To all our customers Regarding the change of names mentioned in the document, such as Hitachi Electric and Hitachi XX, to Renesas Technology Corp. The semiconductor operations of Mitsubishi Electric and Hitachi were transferred to Renesas Technology Corporation on April 1st 2003. These operations include microcomputer, logic, analog and discrete devices, and memory chips other than DRAMs (flash memory, SRAMs etc.) Accordingly, although Hitachi, Hitachi, Ltd., Hitachi Semiconductors, and other Hitachi brand names are mentioned in the document, these names have in fact all been changed to Renesas Technology Corp. Thank you for your understanding. Except for our corporate trademark, logo and corporate statement, no changes whatsoever have been made to the contents of the document, and these changes do not constitute any alteration to the contents of the document itself. Renesas Technology Home Page: http://www.renesas.com Renesas Technology Corp. Customer Support Dept. April 1, 2003 Cautions Keep safety first in your circuit designs! 1. Renesas Technology Corporation puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead to personal injury, fire or property damage. Remember to give due consideration to safety when making your circuit designs, with appropriate measures such as (i) placement of substitutive, auxiliary circuits, (ii) use of nonflammable material or (iii) prevention against any malfunction or mishap. Notes regarding these materials 1. These materials are intended as a reference to assist our customers in the selection of the Renesas Technology Corporation product best suited to the customer's application; they do not convey any license under any intellectual property rights, or any other rights, belonging to Renesas Technology Corporation or a third party. 2. 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Hitachi 16-Bit Microcomputer H8/3008 Hardware Manual ADE-602-221B Rev. 3.0 5/31/02 Hitachi, Ltd. Cautions 1. Hitachi neither warrants nor grants licenses of any rights of Hitachi's or any third party's patent, copyright, trademark, or other intellectual property rights for information contained in this document. Hitachi bears no responsibility for problems that may arise with third party's rights, including intellectual property rights, in connection with use of the information contained in this document. 2. Products and product specifications may be subject to change without notice. Confirm that you have received the latest product standards or specifications before final design, purchase or use. 3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However, contact Hitachi's sales office before using the product in an application that demands especially high quality and reliability or where its failure or malfunction may directly threaten human life or cause risk of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment or medical equipment for life support. 4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly for maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable failure rates or failure modes in semiconductor devices and employ systemic measures such as fail-safes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other consequential damage due to operation of the Hitachi product. 5. This product is not designed to be radiation resistant. 6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without written approval from Hitachi. 7. Contact Hitachi's sales office for any questions regarding this document or Hitachi semiconductor products. Preface The H8/3008 is a high-performance single-chip microcomputer that incorporates the internal 32-bit H8/300H CPU and is also equipped with peripheral functions necessary for configuring a user system. The H8/3008 is built in with a variety of peripheral functions such as ROM, RAM, 16-bit timer, 8-bit timer, programmable timing pattern controller (TPC), watchdog timer (WDT), serial communication interface (SCI), D/A converter, A/D converter and I/O ports. Target Readers: This manual is designed for use by people who design application systems using the H/3008. To use this manual, basic knowledge of electric circuits, logic circuits and microcomputers is required. Purpose: This manual provides the information of the hardware functions and electrical characteristics of the H8/3008. The H8/300H Series Programming Manual contains detailed information of executable instructions. Please read the Programming Manual together with this manual. How to Use the Book: * To understand general functions Read the manual from the beginning. The manual explains the CPU, system control functions, peripheral functions and electrical characteristics in that order. * To understanding CPU functions Refer to the separate H8/300H Series Programming Manual. * To see the detailed functions of registers with known names Refer to Appendix B "Internal I/O Registers" for the summary of addresses, bit description and initialization. Explanatory Note: Bit sequence: upper bit at left, and lower bit at right List of Related Documents: The latest documents are available on our Web site. Please make sure that you have the latest version. (http://www.hitachi.co.jp/Sicd/English/Products/micome.htm) * User manual for H8/3008 Name of Document Document No. H8/3008 Hardware Manual This manual H8/300H Series Programming Manual ADE-602-053 * User manual for development tools Name of Document Document No. C/C++ Compiler, Assembler, Optimizing Linkage Editor User's Manual ADE-702-247 H8S, H8/300 Series Simulator/Debugger User's Manual ADE-702-037 Hitachi Embedded Workshop User's Manual ADE-702-201 H8S, H8/300 Series Hitachi Embedded Workshop, Hitachi Debugging Interface User's Manual ADE-702-231 * Application note Name of Document Document No. H8/300H for CPU Application Note ADE-502-033 H8/300H On-Chip Supporting Modules Application Note ADE-502-035 H8/300H Technical Q&A ADE-502-038 List of Items Revised or Added for This Version Section Page Item 1.3.1 Pin Arrangement 6 Table 1.2 Comparison of Amended table H8/3008 Pin Arrangements 1.3.2 Pin Functions 8 Table 1.3 Pin Functions 1.3.3 Pin Assignments in Each Mode 12 Table 1.4 Pin Assignments (vCL)*3 added to mode 2 in Each Mode (FP-100B, through mode 4 for pin 1 TFP-100B) 14.1.1 Features 397 * High-speed conversion Amended Conversion time 17.2.1 Connecting a Crystal Resonator 431 Table 17.2 Crystal Resonator Parameters Amended table 17.2.2 External Clock Input 433 Table 17.3 Clock Timing (Preliminary) Amended VCC = 3.0 V to 5.5 V to V CC = 3.0 V to 5.6 V, amended external clock input high and low pulse width minimum values from 30 to 15, amended external clock rise and lower time maximum values from 8 to 5 18.4.3 Selection of Waiting Time for Exit from Software Standby Mode 446 Table 18.3 Clock Frequency and Waiting Time for Clock to Settle Incorrect 25 MHz recommended setting time amended Section 19 Electrical Characteristics 451 to 476 19.1 Absolute Maximum Ratings 451 Table 19.1 Absolute Maximum Ratings Amended values for power supply voltage and analog power supply voltage for the 5 V and 3 V versions 19.2 DC Characteristics 455 to 457 Table 19.2 DC Characteristics (2) Amended table and note 3 458 Table 19.3 Permissible Output Currents Amended conditions 459 Table 19.4 Clock Timing Amended condition A, amended clock cycle time and clock pulse low and high width minimum values, as well as clock rise and fall time maximum values, in condition A column 19.3 AC Characteristics Description VCC pin number 1 in table amended Deleted the word preliminary Section Page Item Description 19.3 AC Characteristics 460 Table 19.5 Control Signal Timing Amended condition A, amended RES setup time and NMI, IRQ setup time minimum values, as well as RESO output delay time maximum value, in condition A column 461, 462 Table 19.6 Bus Timing Amended condition A, amended minimum and maximum values in condition A column 463 Table 19.7 Timing of OnChip Supporting Modules Amended condition A, amended output data delay time and timer output delay time maximum values in condition A column 464 19.4 A/D Conversion Characteristics 465, 466 Input clock rise time and input clock fall time values for conditions A, B, and C in table amended Table 19.8 A/D Conversion Characteristics Amended condition A, amended conversion time (single mode) minimum values, maximum values, and units Permissible signal-source impedance, nonlinearity error, offset error, full-scale error, and absolute accuracy max. values for condition A amended. Permissible signal-source impedance entries for 4.0 V AV CC 5.5 V and 3.3 V AV CC < 4.0 V deleted 19.5 D/A Conversion Characteristics 467 H.1 Differences between H8/3067 and H8/3062 Series, H8/3048 Series, H8/3006 and H8/3007, and H8/3008 619 623 H.2 Comparison of Pin Functions of 100-Pin Package Products (FP-100B, TFP100B) Table 19.9 D/A Conversion Characteristics Amended condition A B-mask version notation added to 11 flash memory functions description for H8/3067 Series, H8/3062 Series Table H.1 Pin Arrangement of Each Product (FP-100B, TFP100B) Note *2 description amended to B-mask version Contents Section 1 Overview.............................................................................................................. 1.1 1.2 1.3 Overview............................................................................................................................ Block Diagram................................................................................................................... Pin Description .................................................................................................................. 1.3.1 Pin Arrangement .................................................................................................. 1.3.2 Pin Functions........................................................................................................ 1.3.3 Pin Assignments in Each Mode............................................................................ 1 1 5 6 6 8 12 Section 2 CPU ....................................................................................................................... 17 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Overview............................................................................................................................ 2.1.1 Features ................................................................................................................ 2.1.2 Differences from H8/300 CPU............................................................................. CPU Operating Modes ...................................................................................................... Address Space.................................................................................................................... Register Configuration ...................................................................................................... 2.4.1 Overview .............................................................................................................. 2.4.2 General Registers.................................................................................................. 2.4.3 Control Registers.................................................................................................. 2.4.4 Initial CPU Register Values ................................................................................. Data Formats...................................................................................................................... 2.5.1 General Register Data Formats ............................................................................ 2.5.2 Memory Data Formats.......................................................................................... Instruction Set.................................................................................................................... 2.6.1 Instruction Set Overview...................................................................................... 2.6.2 Instructions and Addressing Modes ..................................................................... 2.6.3 Tables of Instructions Classified by Function...................................................... 2.6.4 Basic Instruction Formats..................................................................................... 2.6.5 Notes on Use of Bit Manipulation Instructions.................................................... Addressing Modes and Effective Address Calculation ..................................................... 2.7.1 Addressing Modes................................................................................................ 2.7.2 Effective Address Calculation.............................................................................. Processing States................................................................................................................ 2.8.1 Overview .............................................................................................................. 2.8.2 Program Execution State ...................................................................................... 2.8.3 Exception-Handling State .................................................................................... 2.8.4 Exception Handling Operation ............................................................................. 2.8.5 Bus-Released State ............................................................................................... 2.8.6 Reset State ............................................................................................................ 2.8.7 Power-Down State................................................................................................ 17 17 18 18 19 20 20 21 22 23 24 24 25 27 27 28 29 38 39 41 41 43 47 47 47 48 49 50 50 51 i 2.9 Basic Operational Timing.................................................................................................. 2.9.1 Overview .............................................................................................................. 2.9.2 On-Chip Memory Access Timing ........................................................................ 2.9.3 On-Chip Supporting Module Access Timing....................................................... 2.9.4 Access to External Address Space ....................................................................... 51 51 51 52 53 Section 3 MCU Operating Modes ................................................................................... 55 3.1 3.2 3.3 3.4 3.5 3.6 Overview............................................................................................................................ 55 3.1.1 Operating Mode Selection.................................................................................... 55 3.1.2 Register Configuration ......................................................................................... 56 Mode Control Register (MDCR) ....................................................................................... 56 System Control Register (SYSCR).................................................................................... 57 Operating Mode Descriptions............................................................................................ 59 3.4.1 Mode 1.................................................................................................................. 59 3.4.2 Mode 2.................................................................................................................. 59 3.4.3 Mode 3.................................................................................................................. 59 3.4.4 Mode 4.................................................................................................................. 60 3.4.5 Modes 5 to 7 ......................................................................................................... 60 Pin Functions in Each Operating Mode............................................................................. 60 Memory Map in Each Operating Mode............................................................................. 61 3.6.1 Reserved Areas..................................................................................................... 61 Section 4 Exception Handling .......................................................................................... 63 4.1 4.2 4.3 4.4 4.5 4.6 Overview............................................................................................................................ 4.1.1 Exception Handling Types and Priority ............................................................... 4.1.2 Exception Handling Operation ............................................................................. 4.1.3 Exception Vector Table........................................................................................ Reset .................................................................................................................................. 4.2.1 Overview .............................................................................................................. 4.2.2 Reset Sequence..................................................................................................... 4.2.3 Interrupts after Reset ............................................................................................ Interrupts............................................................................................................................ Trap Instruction ................................................................................................................. Stack Status after Exception Handling .............................................................................. Notes on Stack Usage........................................................................................................ 63 63 63 64 66 66 66 68 69 69 70 71 Section 5 Interrupt Controller ........................................................................................... 73 5.1 5.2 ii Overview............................................................................................................................ 5.1.1 Features ................................................................................................................ 5.1.2 Block Diagram...................................................................................................... 5.1.3 Pin Configuration ................................................................................................. 5.1.4 Register Configuration ......................................................................................... Register Descriptions......................................................................................................... 73 73 74 75 75 75 5.3 5.4 5.5 5.2.1 System Control Register (SYSCR) ...................................................................... 5.2.2 Interrupt Priority Registers A and B (IPRA, IPRB) ............................................. 5.2.3 IRQ Status Register (ISR) .................................................................................... 5.2.4 IRQ Enable Register (IER) .................................................................................. 5.2.5 IRQ Sense Control Register (ISCR)..................................................................... Interrupt Sources................................................................................................................ 5.3.1 External Interrupts................................................................................................ 5.3.2 Internal Interrupts ................................................................................................. 5.3.3 Interrupt Exception Handling Vector Table ......................................................... Interrupt Operation ............................................................................................................ 5.4.1 Interrupt Handling Process ................................................................................... 5.4.2 Interrupt Exception Handling Sequence .............................................................. 5.4.3 Interrupt Response Time ...................................................................................... Usage Notes ....................................................................................................................... 5.5.1 Contention between Interrupt and Interrupt-Disabling Instruction...................... 5.5.2 Instructions that Inhibit Interrupts........................................................................ 5.5.3 Interrupts during EEPMOV Instruction Execution .............................................. 75 76 81 82 83 84 84 85 85 89 89 94 95 96 96 97 97 Section 6 Bus Controller .................................................................................................... 99 6.1 6.2 6.3 6.4 Overview............................................................................................................................ 6.1.1 Features ................................................................................................................ 6.1.2 Block Diagram...................................................................................................... 6.1.3 Pin Configuration ................................................................................................. 6.1.4 Register Configuration ......................................................................................... Register Descriptions......................................................................................................... 6.2.1 Bus Width Control Register (ABWCR) ............................................................... 6.2.2 Access State Control Register (ASTCR).............................................................. 6.2.3 Wait Control Registers H and L (WCRH, WCRL).............................................. 6.2.4 Bus Release Control Register (BRCR) ................................................................ 6.2.5 Bus Control Register (BCR) ................................................................................ 6.2.6 Chip Select Control Register (CSCR).................................................................. 6.2.7 Address Control Register (ADRCR).................................................................... Operation ........................................................................................................................... 6.3.1 Area Division........................................................................................................ 6.3.2 Bus Specifications ................................................................................................ 6.3.3 Memory Interfaces................................................................................................ 6.3.4 Chip Select Signals............................................................................................... 6.3.5 Address Output Method ....................................................................................... Basic Bus Interface............................................................................................................ 6.4.1 Overview .............................................................................................................. 6.4.2 Data Size and Data Alignment ............................................................................. 6.4.3 Valid Strobes ....................................................................................................... 6.4.4 Memory Areas...................................................................................................... 99 99 100 101 102 102 102 103 104 108 109 111 112 113 113 115 116 116 117 119 119 119 120 121 iii 6.5 6.6 6.7 6.4.5 Basic Bus Control Signal Timing......................................................................... 6.4.6 Wait Control ......................................................................................................... Idle Cycle........................................................................................................................... 6.5.1 Operation .............................................................................................................. 6.5.2 Pin States in Idle Cycle ........................................................................................ Bus Arbiter ........................................................................................................................ 6.6.1 Operation .............................................................................................................. Register and Pin Input Timing .......................................................................................... 6.7.1 Register Write Timing.......................................................................................... 6.7.2 BREQ Pin Input Timing....................................................................................... 122 129 131 131 133 133 134 136 136 137 Section 7 I/O Ports ............................................................................................................... 139 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 Overview............................................................................................................................ Port 4.................................................................................................................................. 7.2.1 Overview .............................................................................................................. 7.2.2 Register Descriptions............................................................................................ Port 6.................................................................................................................................. 7.3.1 Overview .............................................................................................................. 7.3.2 Register Descriptions............................................................................................ Port 7.................................................................................................................................. 7.4.1 Overview .............................................................................................................. 7.4.2 Register Description ............................................................................................. Port 8.................................................................................................................................. 7.5.1 Overview .............................................................................................................. 7.5.2 Register Descriptions............................................................................................ Port 9.................................................................................................................................. 7.6.1 Overview .............................................................................................................. 7.6.2 Register Descriptions............................................................................................ Port A................................................................................................................................. 7.7.1 Overview .............................................................................................................. 7.7.2 Register Descriptions............................................................................................ Port B ................................................................................................................................. 7.8.1 Overview .............................................................................................................. 7.8.2 Register Descriptions............................................................................................ 139 142 142 143 145 145 145 148 148 148 149 149 150 153 153 153 156 156 157 166 166 167 Section 8 16-Bit Timer ....................................................................................................... 171 8.1 8.2 iv Overview............................................................................................................................ 8.1.1 Features ................................................................................................................ 8.1.2 Block Diagrams.................................................................................................... 8.1.3 Pin Configuration ................................................................................................. 8.1.4 Register Configuration ......................................................................................... Register Descriptions......................................................................................................... 8.2.1 Timer Start Register (TSTR)................................................................................ 171 171 173 176 177 178 178 8.3 8.4 8.5 8.6 8.2.2 Timer Synchro Register (TSNC).......................................................................... 8.2.3 Timer Mode Register (TMDR) ............................................................................ 8.2.4 Timer Interrupt Status Register A (TISRA) ......................................................... 8.2.5 Timer Interrupt Status Register B (TISRB).......................................................... 8.2.6 Timer Interrupt Status Register C (TISRC).......................................................... 8.2.7 Timer Counters (16TCNT)................................................................................... 8.2.8 General Registers (GRA, GRB) ........................................................................... 8.2.9 Timer Control Registers (16TCR)........................................................................ 8.2.10 Timer I/O Control Register (TIOR) ..................................................................... 8.2.11 Timer Output Level Setting Register C (TOLR).................................................. CPU Interface .................................................................................................................... 8.3.1 16-Bit Accessible Registers.................................................................................. 8.3.2 8-Bit Accessible Registers.................................................................................... Operation ........................................................................................................................... 8.4.1 Overview .............................................................................................................. 8.4.2 Basic Functions .................................................................................................... 8.4.3 Synchronization.................................................................................................... 8.4.4 PWM Mode .......................................................................................................... 8.4.5 Phase Counting Mode .......................................................................................... 8.4.6 16-Bit Timer Output Timing ................................................................................ Interrupts............................................................................................................................ 8.5.1 Setting of Status Flags.......................................................................................... 8.5.2 Timing of Clearing of Status Flags ...................................................................... 8.5.3 Interrupt Sources .................................................................................................. Usage Notes ....................................................................................................................... 179 180 183 186 189 191 192 193 195 197 199 199 201 202 202 202 210 212 216 218 219 219 221 222 223 Section 9 8-Bit Timers........................................................................................................ 235 9.1 9.2 9.3 9.4 Overview............................................................................................................................ 9.1.1 Features ................................................................................................................ 9.1.2 Block Diagram...................................................................................................... 9.1.3 Pin Configuration ................................................................................................. 9.1.4 Register Configuration ......................................................................................... Register Descriptions......................................................................................................... 9.2.1 Timer Counters (8TCNT)..................................................................................... 9.2.2 Time Constant Registers A (TCORA) ................................................................. 9.2.3 Time Constant Registers B (TCORB).................................................................. 9.2.4 Timer Control Register (8TCR) ........................................................................... 9.2.5 Timer Control/Status Registers (8TCSR) ............................................................ CPU Interface .................................................................................................................... 9.3.1 8-Bit Registers...................................................................................................... Operation ........................................................................................................................... 9.4.1 8TCNT Count Timing.......................................................................................... 9.4.2 Compare Match Timing ....................................................................................... 235 235 237 238 239 240 240 241 242 243 246 251 251 253 253 254 v 9.5 9.6 9.7 9.4.3 Input Capture Signal Timing................................................................................ 9.4.4 Timing of Status Flag Setting............................................................................... 9.4.5 Operation with Cascaded Connection .................................................................. 9.4.6 Input Capture Setting............................................................................................ Interrupt ............................................................................................................................. 9.5.1 Interrupt Sources .................................................................................................. 9.5.2 A/D Converter Activation .................................................................................... 8-Bit Timer Application Example ..................................................................................... Usage Notes ....................................................................................................................... 9.7.1 Contention between 8TCNT Write and Clear...................................................... 9.7.2 Contention between 8TCNT Write and Increment .............................................. 9.7.3 Contention between TCOR Write and Compare Match ...................................... 9.7.4 Contention between TCOR Read and Input Capture ........................................... 9.7.5 Contention between Counter Clearing by Input Capture and Counter Increment.............................................................................................................. 9.7.6 Contention between TCOR Write and Input Capture .......................................... 9.7.7 Contention between 8TCNT Byte Write and Increment in 16-Bit Count Mode (Cascaded Connection) ........................................................................................ 9.7.8 Contention between Compare Matches A and B ................................................. 9.7.9 8TCNT Operation and Internal Clock Source Switchover .................................. 255 256 257 260 261 261 262 262 263 263 264 265 266 267 268 269 270 270 Section 10 Programmable Timing Pattern Controller (TPC).................................. 273 10.1 Overview............................................................................................................................ 10.1.1 Features ................................................................................................................ 10.1.2 Block Diagram...................................................................................................... 10.1.3 Pin Configuration ................................................................................................. 10.1.4 Register Configuration ......................................................................................... 10.2 Register Descriptions......................................................................................................... 10.2.1 Port A Data Direction Register (PADDR) ........................................................... 10.2.2 Port A Data Register (PADR) .............................................................................. 10.2.3 Port B Data Direction Register (PBDDR)............................................................ 10.2.4 Port B Data Register (PBDR)............................................................................... 10.2.5 Next Data Register A (NDRA) ............................................................................ 10.2.6 Next Data Register B (NDRB) ............................................................................. 10.2.7 Next Data Enable Register A (NDERA).............................................................. 10.2.8 Next Data Enable Register B (NDERB) .............................................................. 10.2.9 TPC Output Control Register (TPCR) ................................................................. 10.2.10 TPC Output Mode Register (TPMR) ................................................................... 10.3 Operation ........................................................................................................................... 10.3.1 Overview .............................................................................................................. 10.3.2 Output Timing ...................................................................................................... 10.3.3 Normal TPC Output ............................................................................................. 10.3.4 Non-Overlapping TPC Output ............................................................................. vi 273 273 274 275 276 277 277 277 278 278 279 281 283 284 285 287 289 289 290 291 293 10.3.5 TPC Output Triggering by Input Capture ............................................................ 10.4 Usage Notes ....................................................................................................................... 10.4.1 Operation of TPC Output Pins ............................................................................. 10.4.2 Note on Non-Overlapping Output........................................................................ 295 296 296 296 Section 11 Watchdog Timer ............................................................................................. 299 11.1 Overview............................................................................................................................ 11.1.1 Features ................................................................................................................ 11.1.2 Block Diagram...................................................................................................... 11.1.3 Pin Configuration ................................................................................................. 11.1.4 Register Configuration ......................................................................................... 11.2 Register Descriptions......................................................................................................... 11.2.1 Timer Counter (TCNT) ........................................................................................ 11.2.2 Timer Control/Status Register (TCSR) ................................................................ 11.2.3 Reset Control/Status Register (RSTCSR) ............................................................ 11.2.4 Notes on Register Access ..................................................................................... 11.3 Operation ........................................................................................................................... 11.3.1 Watchdog Timer Operation.................................................................................. 11.3.2 Interval Timer Operation...................................................................................... 11.3.3 Timing of Setting of Overflow Flag (OVF) ......................................................... 11.3.4 Timing of Setting of Watchdog Timer Reset Bit (WRST) .................................. 11.4 Interrupts............................................................................................................................ 11.5 Usage Notes ....................................................................................................................... 299 299 300 300 301 301 301 302 304 305 307 307 308 308 309 310 310 Section 12 Serial Communication Interface ................................................................ 311 12.1 Overview............................................................................................................................ 12.1.1 Features ................................................................................................................ 12.1.2 Block Diagram...................................................................................................... 12.1.3 Pin Configuration ................................................................................................. 12.1.4 Register Configuration ......................................................................................... 12.2 Register Descriptions......................................................................................................... 12.2.1 Receive Shift Register (RSR)............................................................................... 12.2.2 Receive Data Register (RDR) .............................................................................. 12.2.3 Transmit Shift Register (TSR).............................................................................. 12.2.4 Transmit Data Register (TDR) ............................................................................. 12.2.5 Serial Mode Register (SMR)................................................................................ 12.2.6 Serial Control Register (SCR).............................................................................. 12.2.7 Serial Status Register (SSR)................................................................................. 12.2.8 Bit Rate Register (BRR)....................................................................................... 12.3 Operation ........................................................................................................................... 12.3.1 Overview .............................................................................................................. 12.3.2 Operation in Asynchronous Mode........................................................................ 12.3.3 Multiprocessor Communication ........................................................................... 311 311 313 314 315 316 316 316 317 317 318 321 325 330 338 338 341 350 vii 12.3.4 Synchronous Operation ........................................................................................ 12.4 SCI Interrupts .................................................................................................................... 12.5 Usage Notes ....................................................................................................................... 12.5.1 Notes on Use of SCI ............................................................................................. 357 365 366 366 Section 13 Smart Card Interface ...................................................................................... 371 13.1 Overview............................................................................................................................ 13.1.1 Features ................................................................................................................ 13.1.2 Block Diagram...................................................................................................... 13.1.3 Pin Configuration ................................................................................................. 13.1.4 Register Configuration ......................................................................................... 13.2 Register Descriptions......................................................................................................... 13.2.1 Smart Card Mode Register (SCMR) .................................................................... 13.2.2 Serial Status Register (SSR)................................................................................. 13.2.3 Serial Mode Register (SMR)................................................................................ 13.2.4 Serial Control Register (SCR).............................................................................. 13.3 Operation ........................................................................................................................... 13.3.1 Overview .............................................................................................................. 13.3.2 Pin Connections.................................................................................................... 13.3.3 Data Format.......................................................................................................... 13.3.4 Register Settings................................................................................................... 13.3.5 Clock .................................................................................................................... 13.3.6 Transmitting and Receiving Data......................................................................... 13.4 Usage Notes ....................................................................................................................... 371 371 372 372 373 374 374 376 377 378 379 379 379 380 382 384 386 393 Section 14 A/D Converter ................................................................................................. 397 14.1 Overview............................................................................................................................ 14.1.1 Features ................................................................................................................ 14.1.2 Block Diagram...................................................................................................... 14.1.3 Pin Configuration ................................................................................................. 14.1.4 Register Configuration ......................................................................................... 14.2 Register Descriptions......................................................................................................... 14.2.1 A/D Data Registers A to D (ADDRA to ADDRD).............................................. 14.2.2 A/D Control/Status Register (ADCSR)................................................................ 14.2.3 A/D Control Register (ADCR)............................................................................. 14.3 CPU Interface .................................................................................................................... 14.4 Operation ........................................................................................................................... 14.4.1 Single Mode (SCAN = 0) ..................................................................................... 14.4.2 Scan Mode (SCAN = 1) ....................................................................................... 14.4.3 Input Sampling and A/D Conversion Time.......................................................... 14.4.4 External Trigger Input Timing ............................................................................. 14.5 Interrupts............................................................................................................................ 14.6 Usage Notes ....................................................................................................................... viii 397 397 398 399 400 400 400 401 403 404 406 406 408 410 411 412 412 Section 15 D/A Converter ................................................................................................. 417 15.1 Overview............................................................................................................................ 15.1.1 Features ................................................................................................................ 15.1.2 Block Diagram...................................................................................................... 15.1.3 Pin Configuration ................................................................................................. 15.1.4 Register Configuration ......................................................................................... 15.2 Register Descriptions......................................................................................................... 15.2.1 D/A Data Registers 0 and 1 (DADR0, DADR1).................................................. 15.2.2 D/A Control Register (DACR)............................................................................. 15.2.3 D/A Standby Control Register (DASTCR) .......................................................... 15.3 Operation ........................................................................................................................... 15.4 D/A Output Control ........................................................................................................... 417 417 418 419 419 420 420 420 422 422 424 Section 16 RAM ................................................................................................................... 425 16.1 Overview............................................................................................................................ 16.1.1 Block Diagram...................................................................................................... 16.1.2 Register Configuration ......................................................................................... 16.2 System Control Register (SYSCR).................................................................................... 16.3 Operation ........................................................................................................................... 425 426 426 427 428 Section 17 Clock Pulse Generator .................................................................................. 429 17.1 Overview............................................................................................................................ 17.1.1 Block Diagram ..................................................................................................... 17.2 Oscillator Circuit ............................................................................................................... 17.2.1 Connecting a Crystal Resonator ........................................................................... 17.2.2 External Clock Input ............................................................................................ 17.3 Duty Adjustment Circuit.................................................................................................... 17.4 Prescalers ........................................................................................................................... 17.5 Frequency Divider ............................................................................................................. 17.5.1 Register Configuration ......................................................................................... 17.5.2 Division Control Register (DIVCR) .................................................................... 17.5.3 Usage Notes.......................................................................................................... 429 429 430 430 432 434 434 434 435 435 436 Section 18 Power-Down State.......................................................................................... 437 18.1 Overview............................................................................................................................ 437 18.2 Register Configuration ...................................................................................................... 439 18.2.1 System Control Register (SYSCR) ...................................................................... 439 18.2.2 Module Standby Control Register H (MSTCRH)................................................ 441 18.2.3 Module Standby Control Register L (MSTCRL)................................................. 442 18.3 Sleep Mode........................................................................................................................ 444 18.3.1 Transition to Sleep Mode ..................................................................................... 444 18.3.2 Exit from Sleep Mode .......................................................................................... 444 18.4 Software Standby Mode .................................................................................................... 444 ix 18.4.1 Transition to Software Standby Mode.................................................................. 18.4.2 Exit from Software Standby Mode....................................................................... 18.4.3 Selection of Waiting Time for Exit from Software Standby Mode...................... 18.4.4 Sample Application of Software Standby Mode.................................................. 18.4.5 Note ...................................................................................................................... 18.5 Hardware Standby Mode ................................................................................................... 18.5.1 Transition to Hardware Standby Mode ................................................................ 18.5.2 Exit from Hardware Standby Mode ..................................................................... 18.5.3 Timing for Hardware Standby Mode ................................................................... 18.6 Module Standby Function.................................................................................................. 18.6.1 Module Standby Timing....................................................................................... 18.6.2 Read/Write in Module Standby............................................................................ 18.6.3 Usage Notes.......................................................................................................... 18.7 System Clock Output Disabling Function ......................................................................... 444 445 445 447 447 448 448 448 448 449 449 449 449 450 Section 19 Electrical Characteristics .............................................................................. 451 19.1 19.2 19.3 19.4 19.5 19.6 Absolute Maximum Ratings.............................................................................................. DC Characteristics ............................................................................................................. AC Characteristics ............................................................................................................. A/D Conversion Characteristics ........................................................................................ D/A Conversion Characteristics ........................................................................................ Operational Timing............................................................................................................ 19.6.1 Clock Timing........................................................................................................ 19.6.2 Control Signal Timing.......................................................................................... 19.6.3 Bus Timing ........................................................................................................... 19.6.4 TPC and I/O Port Timing ..................................................................................... 19.6.5 Timer Input/Output Timing.................................................................................. 19.6.6 SCI Input/Output Timing ..................................................................................... 451 452 459 465 467 468 468 469 471 475 475 476 Appendix A Instruction Set ............................................................................................... 477 A.1 A.2 A.3 Instruction List................................................................................................................... 477 Operation Code Maps........................................................................................................ 492 Number of States Required for Execution......................................................................... 495 Appendix B Internal I/O Registers.................................................................................. 504 B.1 B.2 Address List ....................................................................................................................... 504 Functions............................................................................................................................ 519 Appendix C I/O Port Block Diagrams ........................................................................... 583 C.1 C.2 C.3 C.4 x Port 4 Block Diagram........................................................................................................ Port 6 Block Diagrams ...................................................................................................... Port 7 Block Diagrams ...................................................................................................... Port 8 Block Diagrams ...................................................................................................... 583 584 588 589 C.5 C.6 C.7 Port 9 Block Diagrams ...................................................................................................... 593 Port A Block Diagrams...................................................................................................... 599 Port B Block Diagrams...................................................................................................... 602 Appendix D Pin States ....................................................................................................... 608 D.1 D.2 Port States in Each Mode .................................................................................................. 608 Pin States at Reset.............................................................................................................. 611 Appendix E Timing of Transition to and Recovery from Hardware Standby Mode .............................................................................................. 613 Appendix F Product Code Lineup ................................................................................. 614 Appendix G Package Dimensions .................................................................................. 615 Appendix H Comparison of H8/300H Series Product Specifications ................. 617 H.1 H.2 Differences between H8/3067 and H8/3062 Series, H8/3048 Series, H8/3006 and H8/3007, and H8/3008................................................................................. 617 Comparison of Pin Functions of 100-Pin Package Products (FP-100B, TFP-100B) ....... 620 xi Figures Figure 1.1 Figure 1.2 Figure 2.1 Figure 2.2 Figure 2.3 Figure 2.4 Figure 2.5 Figure 2.6 Figure 2.7 Figure 2.8 Figure 2.9 Figure 2.10 Figure 2.11 Figure 2.12 Figure 2.13 Figure 2.14 Figure 2.15 Figure 2.16 Figure 2.17 Figure 2.18 Figure 3.1 Figure 4.1 Figure 4.2 Figure 4.3 Figure 4.4 Figure 4.5 Figure 4.6 Figure 5.1 Figure 5.2 Figure 5.3 Figure 5.4 Figure 5.5 Figure 5.6 Figure 5.7 Figure 5.8 Figure 6.1 Figure 6.2 Figure 6.3 Figure 6.4 Figure 6.5 Figure 6.6 xii Block Diagram...................................................................................................... Pin Arrangement of H8/3008 (FP-100B or TFP-100B Package, Top View) ...... CPU Operating Modes ......................................................................................... Memory Map........................................................................................................ CPU Registers ...................................................................................................... Usage of General Registers .................................................................................. Stack ..................................................................................................................... General Register Data Formats ............................................................................ General Register Data Formats ............................................................................ Memory Data Formats.......................................................................................... Instruction Formats .............................................................................................. Memory-Indirect Branch Address Specification.................................................. Processing States .................................................................................................. Classification of Exception Sources..................................................................... State Transitions ................................................................................................... Stack Structure after Exception Handling ............................................................ On-Chip Memory Access Cycle .......................................................................... Pin States during On-Chip Memory Access (Address Update Mode 1).............. Access Cycle for On-Chip Supporting Modules.................................................. Pin States during Access to On-Chip Supporting Modules.................................. Memory Map of H8/3008 in Each Operating Mode ............................................ Exception Sources ................................................................................................ Reset Sequence (Modes 1 and 3).......................................................................... Reset Sequence (Modes 2 and 4).......................................................................... Interrupt Sources and Number of Interrupts ........................................................ Stack after Completion of Exception Handling.................................................... Operation when SP Value is Odd......................................................................... Interrupt Controller Block Diagram ..................................................................... Block Diagram of Interrupts IRQ5 to IRQ0 .......................................................... Timing of Setting of IRQnF ................................................................................. Process Up to Interrupt Acceptance when UE = 1 ............................................... Interrupt Masking State Transitions (Example) ................................................... Process Up to Interrupt Acceptance when UE = 0 ............................................... Interrupt Exception Handling Sequence .............................................................. Contention between Interrupt and Interrupt-Disabling Instruction...................... Block Diagram of Bus Controller ........................................................................ Access Area Map for Each Operating Mode........................................................ Memory Map in 16-Mbyte Mode......................................................................... CSn Signal Output Timing (n = 0 to 7)................................................................ Sample Address Output in Each Address Update Mode (Basic Bus Interface, 3-State Space) .................................................................... Example of Consecutive External Space Accesses in Address Update Mode 2.. 5 7 18 19 20 21 22 24 25 26 39 43 47 48 49 50 52 52 53 53 62 64 67 68 69 70 72 74 84 85 90 92 93 94 96 100 113 114 116 117 118 Figure 6.7 Figure 6.8 Figure 6.9 Figure 6.10 Figure 6.11 Figure 6.12 Figure 6.13 Figure 6.14 Figure 6.15 Figure 6.16 Figure 6.17 Figure 6.18 Figure 6.19 Figure 6.20 Figure 6.21 Figure 6.22 Figure 6.23 Figure 6.24 Figure 7.1 Figure 7.2 Figure 7.3 Figure 7.4 Figure 7.5 Figure 7.6 Figure 7.7 Figure 8.1 Figure 8.2 Figure 8.3 Figure 8.4 Figure 8.5 Figure 8.6 Figure 8.7 Figure 8.8 Figure 8.9 Figure 8.10 Figure 8.11 Figure 8.12 Access Sizes and Data Alignment Control (8-Bit Access Area).......................... Access Sizes and Data Alignment Control (16-Bit Access Area)........................ Bus Control Signal Timing for 8-Bit, Three-State-Access Area.......................... Bus Control Signal Timing for 8-Bit, Two-State-Access Area............................ Bus Control Signal Timing for 16-Bit, Three-State-Access Area (1) (Byte Access to Even Address) ............................................................................ Bus Control Signal Timing for 16-Bit, Three-State-Access Area (2) (Byte Access to Odd Address) ............................................................................. Bus Control Signal Timing for 16-Bit, Three-State-Access Area (3) (Word Access)...................................................................................................... Bus Control Signal Timing for 16-Bit, Two-State-Access Area (1) (Byte Access to Even Address) ............................................................................ Bus Control Signal Timing for 16-Bit, Two-State-Access Area (2) (Byte Access to Odd Address) ............................................................................. Bus Control Signal Timing for 16-Bit, Two-State-Access Area (3) (Word Access)...................................................................................................... Example of Wait State Insertion Timing.............................................................. Example of Idle Cycle Operation (ICIS1 = 1)...................................................... Example of Idle Cycle Operation (ICIS0 = 1)...................................................... Example of Idle Cycle Operation ......................................................................... Example of External Bus Master Operation ........................................................ ASTCR Write Timing .......................................................................................... DDR Write Timing............................................................................................... BRCR Write Timing ............................................................................................ Port 4 Pin Configuration ...................................................................................... Port 6 Pin Configuration ...................................................................................... Port 7 Pin Configuration ...................................................................................... Port 8 Pin Configuration ...................................................................................... Port 9 Pin Configuration ...................................................................................... Port A Pin Configuration...................................................................................... Port B Pin Configuration...................................................................................... 16-bit timer Block Diagram (Overall).................................................................. Block Diagram of Channels 0 and 1 .................................................................... Block Diagram of Channel 2................................................................................ 16TCNT Access Operation [CPU 16TCNT (Word)]...................................... Access to Timer Counter (CPU Reads 16TCNT, Word) ..................................... Access to Timer Counter H (CPU Writes to 16TCNTH, Upper Byte)................ Access to Timer Counter L (CPU Writes to 16TCNTL, Lower Byte) ................ Access to Timer Counter H (CPU Reads 16TCNTH, Upper Byte) ..................... Access to Timer Counter L (CPU Reads 16TCNTL, Lower Byte) ..................... 16TCR Access (CPU Writes to 16TCR).............................................................. 16TCR Access (CPU Reads 16TCR) ................................................................... Counter Setup Procedure (Example).................................................................... 119 120 122 123 124 125 126 127 128 129 130 131 132 132 135 136 136 137 142 145 148 149 153 157 166 173 174 175 199 199 200 200 200 201 201 201 203 xiii Figure 8.13 Figure 8.14 Figure 8.15 Figure 8.16 Figure 8.17 Figure 8.18 Figure 8.19 Figure 8.20 Figure 8.21 Figure 8.22 Figure 8.23 Figure 8.24 Figure 8.25 Figure 8.26 Figure 8.27 Figure 8.28 Figure 8.29 Figure 8.30 Figure 8.31 Figure 8.32 Figure 8.33 Figure 8.34 Figure 8.35 Figure 8.36 Figure 8.37 Figure 8.38 Figure 8.39 Figure 8.40 Figure 8.41 Figure 8.42 Figure 8.43 Figure 8.44 Figure 9.1 Figure 9.2 Figure 9.3 Figure 9.4 Figure 9.5 Figure 9.6 Figure 9.7 Figure 9.8 Figure 9.9 Figure 9.10 xiv Free-Running Counter Operation ......................................................................... Periodic Counter Operation.................................................................................. Count Timing for Internal Clock Sources ............................................................ Count Timing for External Clock Sources (when Both Edges are Detected) ...... Setup Procedure for Waveform Output by Compare Match (Example) .............. 0 and 1 Output (TOA = 1, TOB = 0).................................................................... Toggle Output (TOA = 1, TOB = 0) .................................................................... Output Compare Output Timing .......................................................................... Setup Procedure for Input Capture (Example) ..................................................... Input Capture (Example) ...................................................................................... Input Capture Signal Timing................................................................................ Setup Procedure for Synchronization (Example) ................................................. Synchronization (Example).................................................................................. Setup Procedure for PWM Mode (Example) ....................................................... PWM Mode (Example 1) ..................................................................................... PWM Mode (Example 2) ..................................................................................... Setup Procedure for Phase Counting Mode (Example)........................................ Operation in Phase Counting Mode (Example).................................................... Phase Difference, Overlap, and Pulse Width in Phase Counting Mode .............. Timing for Setting 16-Bit Timer Output Level by Writing to TOLR .................. Timing of Setting of IMFA and IMFB by Compare Match................................. Timing of Setting of IMFA and IMFB by Input Capture .................................... Timing of Setting of OVF .................................................................................... Timing of Clearing of Status Flags ...................................................................... Contention between 16TCNT Write and Clear.................................................... Contention between 16TCNT Word Write and Increment .................................. Contention between 16TCNT Byte Write and Increment.................................... Contention between General Register Write and Compare Match ...................... Contention between 16TCNT Write and Overflow ............................................. Contention between General Register Read and Input Capture........................... Contention between Counter Clearing by Input Capture and Counter Increment.............................................................................................................. Contention between General Register Write and Input Capture.......................... Block Diagram of 8-Bit Timer Unit (Two Channels: Group 0)........................... 8TCNT Access Operation (CPU Writes to 8TCNT, Word) ................................ 8TCNT Access Operation (CPU Reads 8TCNT, Word)...................................... 8TCNT0 Access Operation (CPU Writes to 8TCNT0, Upper Byte) ................... 8TCNT1 Access Operation (CPU Writes to 8TCNT1, Lower Byte) .................. 8TCNT0 Access Operation (CPU Reads 8TCNT0, Upper Byte) ........................ 8TCNT1 Access Operation (CPU Reads 8TCNT1, Lower Byte)........................ Count Timing for Internal Clock Input ................................................................ Count Timing for External Clock Input (Both-Edge Detection).......................... Timing of Timer Output ....................................................................................... 204 204 205 205 206 207 207 208 209 209 210 211 212 213 214 215 216 217 217 218 219 220 221 221 223 224 225 226 227 228 229 230 237 251 251 251 252 252 252 253 254 254 Figure 9.11 Figure 9.12 Figure 9.13 Figure 9.14 Figure 9.15 Figure 9.16 Figure 9.17 Figure 9.18 Figure 9.19 Figure 9.20 Figure 9.21 Figure 9.22 Timing of Clear by Compare Match .................................................................... Timing of Clear by Input Capture ........................................................................ Timing of Input Capture Input Signal .................................................................. CMF Flag Setting Timing when Compare Match Occurs.................................... CMFB Flag Setting Timing when Input Capture Occurs .................................... Timing of OVF Setting ........................................................................................ Example of Pulse Output...................................................................................... Contention between 8TCNT Write and Clear...................................................... Contention between 8TCNT Write and Increment .............................................. Contention between TCOR Write and Compare Match ...................................... Contention between TCOR Read and Input Capture ........................................... Contention between Counter Clearing by Input Capture and Counter Increment.............................................................................................................. Figure 9.23 Contention between TCOR Write and Input Capture .......................................... Figure 9.24 Contention between 8TCNT Byte Write and Increment in 16-Bit Count Mode . Figure 10.1 TPC Block Diagram ............................................................................................. Figure 10.2 TPC Output Operation.......................................................................................... Figure 10.3 Timing of Transfer of Next Data Register Contents and Output (Example) ....... Figure 10.4 Setup Procedure for Normal TPC Output (Example) .......................................... Figure 10.5 Normal TPC Output Example (Five-Phase Pulse Output) ................................... Figure 10.6 Setup Procedure for Non-Overlapping TPC Output (Example) .......................... Figure 10.7 Non-Overlapping TPC Output Example (Four-Phase Complementary Non-Overlapping Pulse Output) ........................... Figure 10.8 TPC Output Triggering by Input Capture (Example) .......................................... Figure 10.9 Non-Overlapping TPC Output ............................................................................. Figure 10.10 Non-Overlapping Operation and NDR Write Timing.......................................... Figure 11.1 WDT Block Diagram ........................................................................................... Figure 11.2 Format of Data Written to TCNT and TCSR ....................................................... Figure 11.3 Format of Data Written to RSTCSR .................................................................... Figure 11.4 Operation in Watchdog Timer Mode ................................................................... Figure 11.5 Interval Timer Operation...................................................................................... Figure 11.6 Timing of Setting of OVF .................................................................................... Figure 11.7 Timing of Setting of WRST Bit and Internal Reset ............................................. Figure 11.8 Contention between TCNT Write and Count up.................................................. Figure 12.1 SCI Block Diagram .............................................................................................. Figure 12.2 Data Format in Asynchronous Communication (Example: 8-Bit Data with Parity and 2 Stop Bits) .............................................. Figure 12.3 Phase Relationship between Output Clock and Serial Data (Asynchronous Mode).......................................................................................... Figure 12.4 Sample Flowchart for SCI Initialization .............................................................. Figure 12.5 Sample Flowchart for Transmitting Serial Data .................................................. Figure 12.6 Example of SCI Transmit Operation in Asynchronous Mode (8-Bit Data with Parity and One Stop Bit) ........................................................... 255 255 256 256 257 257 262 263 264 265 266 267 268 269 274 289 290 291 292 293 294 295 296 297 300 305 306 307 308 308 309 310 313 341 343 344 345 346 xv Figure 12.7 Figure 12.8 Figure 12.9 Figure 12.10 Figure 12.11 Figure 12.12 Figure 12.13 Figure 12.14 Figure 12.15 Figure 12.16 Figure 12.17 Figure 12.18 Figure 12.19 Figure 12.20 Figure 12.21 Figure 12.22 Figure 12.23 Figure 12.24 Figure 13.1 Figure 13.2 Figure 13.3 Figure 13.4 Figure 13.5 Figure 13.6 Figure 13.7 Figure 13.8 Figure 13.9 Figure 13.10 Figure 13.11 Figure 13.12 Figure 13.13 Figure 14.1 Figure 14.2 Figure 14.3 Figure 14.4 Figure 14.5 Figure 14.6 xvi Sample Flowchart for Receiving Serial Data ....................................................... Example of SCI Receive Operation (8-Bit Data with Parity and One Stop Bit) ........................................................... Example of Communication among Processors using Multiprocessor Format (Sending Data H'AA to Receiving Processor A).................................................. Sample Flowchart for Transmitting Multiprocessor Serial Data ......................... Example of SCI Transmit Operation (8-Bit Data with Multiprocessor Bit and One Stop Bit)....................................... Sample Flowchart for Receiving Multiprocessor Serial Data.............................. Example of SCI Receive Operation (8-Bit Data with Multiprocessor Bit and One Stop Bit)....................................... Data Format in Synchronous Communication ..................................................... Sample Flowchart for SCI Initialization .............................................................. Sample Flowchart for Serial Transmitting ........................................................... Example of SCI Transmit Operation.................................................................... Sample Flowchart for Serial Receiving................................................................ Example of SCI Receive Operation ..................................................................... Sample Flowchart for Simultaneous Serial Transmitting and Receiving ............ Receive Data Sampling Timing in Asynchronous Mode ..................................... Example of Synchronous Transmission ............................................................... Operation when Switching from SCK Pin Function to Port Pin Function........... Operation when Switching from SCK Pin Function to Port Pin Function (Example of Preventing Low-Level Output)........................................................ Block Diagram of Smart Card Interface .............................................................. Smart Card Interface Connection Diagram .......................................................... Smart Card Interface Data Format........................................................................ Timing of TEND Flag Setting.............................................................................. Sample Transmission Processing Flowchart........................................................ Relation Between Transmit Operation and Internal Registers ............................. Timing of TEND Flag Setting.............................................................................. Sample Reception Processing Flowchart ............................................................. Timing for Fixing Cock Output............................................................................ Procedure for Stopping and Restarting the Clock ................................................ Receive Data Sampling Timing in Smart Card Interface Mode .......................... Retransmission in SCI Receive Mode.................................................................. Retransmission in SCI Transmit Mode ................................................................ A/D Converter Block Diagram ............................................................................ A/D Data Register Access Operation (Reading H'AA40).................................... Example of A/D Converter Operation (Single Mode, Channel 1 Selected) ........ Example of A/D Converter Operation (Scan Mode, Channels AN0 to AN2 Selected)...................................................... A/D Conversion Timing ....................................................................................... External Trigger Input Timing ............................................................................. 347 350 351 352 353 354 356 357 358 359 360 361 363 364 367 368 369 370 372 380 381 387 388 389 389 390 391 392 393 395 395 398 405 407 409 410 411 Figure 14.7 Figure 14.8 Figure 14.9 Figure 14.10 Figure 14.11 Figure 15.1 Figure 15.2 Figure 16.1 Figure 17.1 Figure 17.2 Figure 17.3 Figure 17.4 Figure 17.5 Figure 17.6 Figure 17.7 Figure 18.1 Figure 18.2 Figure 18.3 Figure 19.1 Figure 19.2 Figure 19.3 Figure 19.4 Figure 19.5 Figure 19.6 Figure 19.7 Figure 19.8 Figure 19.9 Figure 19.10 Figure 19.11 Figure 19.12 Figure 19.13 Figure 19.14 Figure 19.15 Figure C.1 Figure C.2 (a) Figure C.2 (b) Figure C.2 (c) Figure C.2 (d) Figure C.3 (a) Figure C.3 (b) Figure C.4 (a) Figure C.4 (b) Figure C.4 (c) Example of Analog Input Protection Circuit........................................................ Analog Input Pin Equivalent Circuit .................................................................... A/D Converter Accuracy Definitions (1) ............................................................. A/D Converter Accuracy Definitions (2) ............................................................. Analog Input Circuit (Example)........................................................................... D/A Converter Block Diagram ............................................................................ Example of D/A Converter Operation.................................................................. RAM Block Diagram ........................................................................................... Block Diagram of Clock Pulse Generator............................................................ Connection of Crystal Resonator (Example)........................................................ Crystal Resonator Equivalent Circuit................................................................... Oscillator Circuit Block Board Design Precautions............................................. External Clock Input (Examples) ......................................................................... External Clock Input Timing................................................................................ External Clock Output Settling Delay Timing ..................................................... NMI Timing for Software Standby Mode (Example) .......................................... Hardware Standby Mode Timing ......................................................................... Starting and Stopping of System Clock Output ................................................... Darlington Pair Drive Circuit (Example) ............................................................. Output Load Circuit ............................................................................................. Oscillator Settling Timing.................................................................................... Reset Input Timing ............................................................................................... Reset Output Timing ............................................................................................ Interrupt Input Timing.......................................................................................... Basic Bus Cycle: Two-State Access .................................................................... Basic Bus Cycle: Three-State Access .................................................................. Basic Bus Cycle: Three-State Access with One Wait State ................................. Bus-Release Mode Timing ................................................................................... TPC and I/O Port Input/Output Timing................................................................ Timer Input/Output Timing.................................................................................. Timer External Clock Input Timing ..................................................................... SCI Input Clock Timing ....................................................................................... SCI Input/Output Timing in Synchronous Mode ................................................. Port 4 Block Diagram........................................................................................... Port 6 Block Diagram (Pin P60)............................................................................ Port 6 Block Diagram (Pin P61)............................................................................ Port 6 Block Diagram (Pin P62)............................................................................ Port 6 Block Diagram (Pin P67)............................................................................ Port 7 Block Diagram (Pins P70 to P75)................................................................ Port 7 Block Diagram (Pins P76 and P77)............................................................. Port 8 Block Diagram (Pin P80)............................................................................ Port 8 Block Diagram (Pins P81 and P82)............................................................. Port 8 Block Diagram (Pin P83)............................................................................ 413 413 414 415 416 418 423 426 429 430 431 431 432 433 434 447 448 450 458 464 468 469 469 470 472 473 474 474 475 475 476 476 476 583 584 585 586 587 588 588 589 590 591 xvii Figure C.4 (d) Figure C.5 (a) Figure C.5 (b) Figure C.5 (c) Figure C.5 (d) Figure C.5 (e) Figure C.5 (f) Figure C.6 (a) Figure C.6 (b) Figure C.6 (c) Figure C.7 (a) Figure C.7 (b) Figure C.7 (c) Figure C.7 (d) Figure C.7 (e) Figure C.7 (f) Figure D.1 Figure D.2 Figure G.1 Figure G.2 xviii Port 8 Block Diagram (Pin P84)............................................................................ Port 9 Block Diagram (Pin P90)............................................................................ Port 9 Block Diagram (Pin P91)............................................................................ Port 9 Block Diagram (Pin P92)............................................................................ Port 9 Block Diagram (Pin P93)............................................................................ Port 9 Block Diagram (Pin P94)............................................................................ Port 9 Block Diagram (Pin P95)............................................................................ Port A Block Diagram (Pins PA0 and PA1).......................................................... Port A Block Diagram (Pins PA 2 and PA3).......................................................... Port A Block Diagram (Pins PA 4 to PA 7) ............................................................ Port B Block Diagram (Pins PB0 and PB2)........................................................... Port B Block Diagram (Pins PB1 and PB3)........................................................... Port B Block Diagram (Pin PB 4).......................................................................... Port B Block Diagram (Pin PB 5).......................................................................... Port B Block Diagram (Pin PB 6).......................................................................... Port B Block Diagram (Pin PB 7).......................................................................... Reset during Memory Access (Modes 1 and 2).................................................... Reset during Memory Access (Modes 3 and 4) ................................................... Package Dimensions (FP-100B) .......................................................................... Package Dimensions (TFP-100B) ........................................................................ 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 611 612 615 616 Tables Table 1.1 Table 1.2 Table 1.3 Table 1.4 Table 2.1 Table 2.2 Table 2.3 Table 2.4 Table 2.5 Table 2.6 Table 2.7 Table 2.8 Table 2.9 Table 2.10 Table 2.11 Table 2.12 Table 2.13 Table 2.14 Table 3.1 Table 3.2 Table 3.3 Table 4.1 Table 4.2 Table 5.1 Table 5.2 Table 5.3 Table 5.4 Table 5.5 Table 6.1 Table 6.2 Table 6.3 Table 6.4 Table 6.5 Table 7.1 Table 7.2 Table 7.3 Table 7.4 Table 7.5 Table 7.6 Table 7.7 Table 7.8 Table 7.9 Features ................................................................................................................... Comparison of H8/3008 Pin Arrangements............................................................ Pin Functions .......................................................................................................... Pin Assignments in Each Mode (FP-100B, TFP-100B) ......................................... Instruction Classification ........................................................................................ Instructions and Addressing Modes........................................................................ Data Transfer Instructions ...................................................................................... Arithmetic Operation Instructions .......................................................................... Logic Operation Instructions .................................................................................. Shift Instructions..................................................................................................... Bit Manipulation Instructions ................................................................................. Branching Instructions............................................................................................ System Control Instructions.................................................................................... Block Transfer Instruction...................................................................................... Addressing Modes .................................................................................................. Absolute Address Access Ranges........................................................................... Effective Address Calculation ................................................................................ Exception Handling Types and Priority.................................................................. Operating Mode Selection ...................................................................................... Registers.................................................................................................................. Pin Functions in Each Mode ................................................................................... Exception Types and Priority.................................................................................. Exception Vector Table .......................................................................................... Interrupt Pins .......................................................................................................... Interrupt Controller Registers ................................................................................. Interrupt Sources, Vector Addresses, and Priority.................................................. UE, I, and UI Bit Settings and Interrupt Handling ................................................. Interrupt Response Time......................................................................................... Bus Controller Pins ................................................................................................. Bus Controller Registers ......................................................................................... Bus Specifications for Each Area (Basic Bus Interface) ........................................ Data Buses Used and Valid Strobes........................................................................ Pin States in Idle Cycle ........................................................................................... Port Functions ......................................................................................................... Port 4 Registers ....................................................................................................... Input Pull-Up Transistor States (Port 4) ................................................................. Port 6 Registers ....................................................................................................... Port 6 Pin Functions in Modes 1 to 4...................................................................... Port 7 Data Register................................................................................................ Port 8 Registers ....................................................................................................... Port 8 Pin Functions in Modes 1 to 4...................................................................... Port 9 Registers ....................................................................................................... 2 6 8 12 27 28 30 31 33 33 34 36 37 38 41 42 44 48 55 56 60 63 65 75 75 86 89 95 101 102 115 120 133 139 143 144 145 147 148 150 152 153 xix Table 7.10 Port 9 Pin Functions................................................................................................ Table 7.11 Port A Registers...................................................................................................... Table 7.12 Port A Pin Functions (Modes 1 and 2).................................................................... Table 7.13 Port A Pin Functions (Modes 3 and 4).................................................................... Table 7.14 Port A Pin Functions (Modes 1 to 4) ...................................................................... Table 7.15 Port B Registers ...................................................................................................... Table 7.16 Port B Pin Functions (Modes 1 to 4) ...................................................................... Table 8.1 16-bit timer Functions............................................................................................. Table 8.2 16-bit timer Pins...................................................................................................... Table 8.3 16-bit timer Registers.............................................................................................. Table 8.4 PWM Output Pins and Registers ............................................................................ Table 8.5 Up/Down Counting Conditions .............................................................................. Table 8.6 16-bit timer Interrupt Sources................................................................................. Table 8.7 (a) 16-bit timer Operating Modes (Channel 0) ............................................................ Table 8.7 (b) 16-bit timer Operating Modes (Channel 1) ............................................................ Table 8.7 (c) 16-bit timer Operating Modes (Channel 2) ............................................................ Table 9.1 8-Bit Timer Pins...................................................................................................... Table 9.2 8-Bit Timer Registers.............................................................................................. Table 9.3 Operation of Channels 0 and 1 when Bit ICE is Set to 1 in 8TCSR1 Register ...... Table 9.4 Operation of Channels 2 and 3 when Bit ICE is Set to 1 in 8TCSR3 Register ...... Table 9.5 Types of 8-Bit Timer Interrupt Sources and Priority Order ................................... Table 9.6 8-Bit Timer Interrupt Sources................................................................................. Table 9.7 Timer Output Priority Order ................................................................................... Table 9.8 Internal Clock Switchover and 8TCNT Operation ................................................. Table 10.1 TPC Pins ................................................................................................................. Table 10.2 TPC Registers ......................................................................................................... Table 10.3 TPC Operating Conditions...................................................................................... Table 11.1 WDT Pin ................................................................................................................. Table 11.2 WDT Registers........................................................................................................ Table 11.3 Read Addresses of TCNT, TCSR, and RSTCSR ................................................... Table 12.1 SCI Pins .................................................................................................................. Table 12.2 SCI Registers .......................................................................................................... Table 12.3 Examples of Bit Rates and BRR Settings in Asynchronous Mode ........................ Table 12.4 Examples of Bit Rates and BRR Settings in Synchronous Mode .......................... Table 12.5 Maximum Bit Rates for Various Frequencies (Asynchronous Mode) ................... Table 12.6 Maximum Bit Rates with External Clock Input (Asynchronous Mode) ................ Table 12.7 Maximum Bit Rates with External Clock Input (Synchronous Mode) .................. Table 12.8 SMR Settings and Serial Communication Formats ................................................ Table 12.9 SMR and SCR Settings and SCI Clock Source Selection ...................................... Table 12.10 Serial Communication Formats (Asynchronous Mode) ......................................... Table 12.11 Receive Error Conditions........................................................................................ Table 12.12 SCI Interrupt Sources.............................................................................................. Table 12.13 SSR Status Flags and Transfer of Receive Data..................................................... xx 155 157 159 161 163 167 169 172 176 177 212 217 222 232 233 234 238 239 249 249 261 261 270 271 275 276 289 300 301 306 314 315 331 334 336 337 338 340 340 342 349 365 366 Table 13.1 Smart Card Interface Pins ....................................................................................... Table 13.2 Smart Card Interface Registers ............................................................................... Table 13.3 Smart Card Interface Register Settings................................................................... Table 13.4 n-Values of CKS1 and CKS0 Settings.................................................................... Table 13.5 Bit Rates (bits/s) for Various BRR Settings (When n = 0) ..................................... Table 13.6 BRR Settings for Typical Bit Rates (bits/s) (When n = 0) ..................................... Table 13.7 Maximum Bit Rates for Various Frequencies (Smart Card Interface Mode)......... Table 13.8 Smart Card Interface Mode Operating States and Interrupt Sources...................... Table 14.1 A/D Converter Pins................................................................................................. Table 14.2 A/D Converter Registers......................................................................................... Table 14.3 Analog Input Channels and A/D Data Registers (ADDRA to ADDRD) ............... Table 14.4 A/D Conversion Time (Single Mode) .................................................................... Table 14.5 Analog Input Pin Ratings........................................................................................ Table 15.1 D/A Converter Pins................................................................................................. Table 15.2 D/A Converter Registers......................................................................................... Table 16.1 H8/3008 On-Chip RAM Specifications.................................................................. Table 16.2 System Control Register ......................................................................................... Table 17.1 (1) Damping Resistance Value................................................................................... Table 17.1 (2) External Capacitance Values ................................................................................ Table 17.2 Crystal Resonator Parameters ................................................................................. Table 17.3 Clock Timing (Preliminary).................................................................................... Table 17.4 Frequency Division Register .................................................................................. Table 18.1 Power-Down State and Module Standby Function ................................................ Table 18.2 Control Register...................................................................................................... Table 18.3 Clock Frequency and Waiting Time for Clock to Settle ........................................ Table 18.4 Pin State in Various Operating States.................................................................. Table 19.1 Absolute Maximum Ratings ................................................................................... Table 19.2 DC Characteristics (1) ............................................................................................ Table 19.2 DC Characteristics (2) ............................................................................................ Table 19.3 Permissible Output Currents ................................................................................... Table 19.4 Clock Timing .......................................................................................................... Table 19.5 Control Signal Timing ............................................................................................ Table 19.6 Bus Timing ............................................................................................................. Table 19.7 Timing of On-Chip Supporting Modules................................................................ Table 19.8 A/D Conversion Characteristics ............................................................................. Table 19.9 D/A Conversion Characteristics ............................................................................. Table A.1 Instruction Set ......................................................................................................... Table A.2 Operation Code Map (1) ......................................................................................... Table A.2 Operation Code Map (2) ......................................................................................... Table A.2 Operation Code Map (3) ......................................................................................... Table A.3 Number of States per Cycle.................................................................................... Table A.4 Number of Cycles per Instruction........................................................................... Table D.1 Port States ............................................................................................................... 372 373 382 384 384 385 385 391 399 400 401 411 413 419 419 425 426 430 430 431 433 435 438 439 446 450 451 452 455 458 459 460 461 463 465 467 479 492 493 494 496 497 608 xxi Table F.1 Table H.1 xxii H8/3008 Product Code Lineup ............................................................................... 614 Pin Arrangement of Each Product (FP-100B, TFP-100B) ..................................... 620 Section 1 Overview 1.1 Overview The H8/3008 is a microcontroller (MCU) that integrates system supporting functions together with an H8/300H CPU core having an original Hitachi architecture. The H8/300H CPU has a 32-bit internal architecture with sixteen 16-bit general registers, and a concise, optimized instruction set designed for speed. It can address a 16-Mbyte linear address space. Its instruction set is upward-compatible at the object-code level with the H8/300 CPU, enabling easy porting of software from the H8/300 Series. The on-chip system supporting functions include RAM, a 16-bit timer, an 8-bit timer, a programmable timing pattern controller (TPC), a watchdog timer (WDT), a serial communication interface (SCI), an A/D converter, a D/A converter, I/O ports, and other facilities. Six MCU operating modes offer a choice of bus width and address space size. The modes (modes 1 to 4) include four expanded modes. Table 1.1 summarizes the features of the H8/3008. 1 Table 1.1 Features Feature Description CPU Upward-compatible with the H8/300 CPU at the object-code level General-register machine * Sixteen 16-bit general registers (also usable as sixteen 8-bit registers plus eight 16-bit registers, or as eight 32-bit registers) High-speed operation * Maximum clock rate: 25 MHz * Add/subtract: 80 ns * Multiply/divide: 560 ns 16-Mbyte address space Instruction features * 8/16/32-bit data transfer, arithmetic, and logic instructions * Signed and unsigned multiply instructions (8 bits x 8 bits, 16 bits x 16 bits) * Signed and unsigned divide instructions (16 bits / 8 bits, 32 bits / 16 bits) * Bit accumulator function Bit manipulation instructions with register-indirect specification of bit positions Memory Interrupt controller Bus controller 2 H8/3008 * RAM: 4 kbytes * Seven external interrupt pins: NMI, IRQ0 to IRQ5 * 27 internal interrupts * Three selectable interrupt priority levels * Address space can be partitioned into eight areas, with independent bus specifications in each area * Chip select output available for areas 0 to 7 * 8-bit access or 16-bit access selectable for each area * Two-state or three-state access selectable for each area * Selection of two wait modes * Number of program wait states selectable for each area * Bus arbitration function * Two address update modes Feature Description 16-bit timer, 3 channels * Three 16-bit timer channels, capable of processing up to six pulse outputs or six pulse inputs * 16-bit timer counter (channels 0 to 2) * Two multiplexed output compare/input capture pins (channels 0 to 2) * Operation can be synchronized (channels 0 to 2) * PWM mode available (channels 0 to 2) * Phase counting mode available (channel 2) * 8-bit up-counter (external event count capability) * Two time constant registers * Two channels can be connected * Maximum 16-bit pulse output, using 16-bit timer as time base * Up to four 4-bit pulse output groups (or one 16-bit group, or two 8-bit groups) * Non-overlap mode available * Internal reset signal can be generated by overflow * Reset signal can be output externally * Usable as an interval timer * Selection of asynchronous or synchronous mode * Full duplex: can transmit and receive simultaneously * On-chip baud-rate generator * Smart card interface functions added * Resolution: 10 bits * Eight channels, with selection of single or scan mode * Variable analog conversion voltage range * Sample-and-hold function * A/D conversion can be started by an external trigger or 8-bit timer comparematch * Resolution: 8 bits * Two channels * D/A outputs can be sustained in software standby mode * 35 input/output pins * 12 input-only pins 8-bit timer, 4 channels Programmable timing pattern controller (TPC) Watchdog timer (WDT), 1 channel Serial communication interface (SCI), 2 channels A/D converter D/A converter I/O ports 3 Feature Description Operating modes Six MCU operating modes Power-down state Other features Address Space Address Pins Initial Bus Width Max. Bus Width Mode Mode 1 1 Mbyte A19 to A 0 8 bits 16 bits Mode 2 1 Mbyte A19 to A 0 16 bits 16 bits Mode 3 16 Mbytes A23 to A 0 8 bits 16 bits Mode 4 16 Mbytes A23 to A 0 16 bits 16 bits * On-chip ROM is disabled in modes 1 to 4 * Sleep mode * Software standby mode * Hardware standby mode * Module standby function * Programmable system clock frequency division * On-chip clock pulse generator Product lineup Product Type H8/3008 Model 5 V operation HD6413008F HD6413008TE 3 V operation HD6413008VF HD6413008VTE 4 Package (Hitachi Package Code) 100-pin QFP (FP-100B) 100-pin TQFP (TFP-100B) 100-pin QFP (FP-100B) 100-pin TQFP (TFP-100B) 1.2 Block Diagram Port 3 P40 /D0 P41 /D1 P42 /D2 P43 /D3 P44 /D4 P45 /D5 P46 /D6 P47 /D7 D8 D9 D10 D11 D12 D13 D14 D15 VSS VSS VSS VSS VSS VSS VCC VCC VCL* Figure 1.1 shows an internal block diagram. Port 4 Address bus Data bus (upper) MD1 Data bus (lower) A 19 Port 5 MD2 MD0 A 18 A 17 A 16 EXTAL A 15 Clock pulse generator RES RESO A 14 H8/300H CPU A 13 Port 2 XTAL STBY NMI LWR RD AS Port 6 HWR A 11 A 10 Bus controller Interrupt controller /P67 A 12 A9 A8 A7 A6 A5 Port 1 BACK/P62 BREQ/P61 WAIT/P60 A4 A3 A2 RAM A1 CS0/P84 CS3/IRQ1/P81 A0 16-bit timer unit IRQ0/P80 Serial communication interface (SCI) x 2 channels 8-bit timer unit Programmable timing pattern controller (TPC) P95 /SCK 1 /IRQ 5 P94 /SCK 0 /IRQ 4 A/D converter Port 9 CS2/IRQ2/P82 Port 8 ADTRG/CS1/IRQ3/P83 Watchdog timer (WDT) D/A converter P93 /RxD1 P92 /RxD0 P91 /TxD 1 P90 /TxD 0 AN0/P70 AN1/P71 AN2/P72 AN3/P73 AN4/P74 AN5/P75 DA0/AN6/P76 DA1/AN7/P77 AVSS VREF AVCC TCLKA/TP0/PA0 TCLKB/TP1/PA1 Port 7 TCLKC/TIOCA0/TP2/PA2 TCLKD/TIOCB0/TP3/PA3 A23/TIOCA1/TP4/PA4 A22/TIOCB1/TP5/PA5 A21/TIOCA2/TP6/PA6 A20/TIOCB2/TP7/PA7 CS7/TMO0/TP8/PB0 CS6/TMIO1/TP9/PB1 Port A CS5/TMO2/TP10/PB2 CS4/TMIO3/TP11/PB3 TP12/PB4 TP14/PB6 TP13/PB5 TP15/PB7 Port B Note: * The 5 V operation models have a VCL pin, and require the connection of an external capacitor. Figure 1.1 Block Diagram 5 1.3 Pin Description 1.3.1 Pin Arrangement The pin arrangement of the H8/3008 is shown in figures 1.2 and 1.3. Differences in the H8/3008 pin arrangements are shown in table 1.2. Except for the differences shown in table 1.2, the pin arrangements are the same. Table 1.2 Comparison of H8/3008 Pin Arrangements H8/3064 F-ZTAT B-Mask Version H8/3026 F-ZTAT H8/3062 F-ZTAT A-Mask Version H8/3024 F-ZTAT H8/3008 ROMless Operation Model Package Pin Number 5V 3V 5V 3V 5V 3V FP-100B 1 VCL VCC VCL VCC VCL VCC (TFP-100B) 10 FWE FWE FWE FWE RESO RESO 6 P60 /WAIT VSS A19 58 57 56 A14 P61 /BREQ 59 A15 P62 /BACK 60 51 P67/ 61 A16 STBY 62 52 RES 63 53 NMI 64 A18 VSS 65 A17 EXTAL 66 54 XTAL 67 55 VCC 68 HWR 71 RD LWR 72 AS MD0 73 69 MD1 74 70 MD2 75 D15 TCLKA/TP0/PA0 93 33 D14 TCLKB/TP1/PA1 94 32 D13 TCLKC/TIOCA0/TP2/PA2 95 31 D12 TCLKD/TIOCB0/TP3/PA3 96 30 D11 A23/TIOCA1/TP4/PA4 97 29 D10 A22/TIOCB1/TP5/PA5 98 28 D9 A21/TIOCA2/TP6/PA6 99 27 D8 A20/TIOCB2/TP7/PA7 100 26 D7/P47 25 34 D6 /P46 92 24 VCC VSS 23 35 D5 /P45 91 D4 /P44 A0 CS0/P84 22 36 VSS 90 21 A1 ADTRG/CS1/IRQ3/P83 D3 /P43 37 20 89 D2 /P42 A2 CS2/IRQ2/P82 19 38 D1 /P41 (FP-100B,TFP-100B) 18 88 D0 /P40 A3 CS 3 /IRQ1/P81 17 39 IRQ5 /SCK1 /P95 Top view 16 A4 87 IRQ4 /SCK0 /P94 40 15 86 RxD1 /P93 A5 AV SS IRQ0 /P80 14 41 RxD0 /P92 A6 85 13 42 TxD1 /P91 84 12 A7 P76 /AN6 /DA 0 P77 /AN7 /DA 1 TxD0 /P90 43 11 83 10 VSS P75 /AN5 RESO VSS 44 9 82 8 A8 P74 /AN4 TP15/PB7 45 TP14/PB6 81 7 A9 P73 /AN3 TP13/PB5 46 6 80 TP12/PB4 A10 P72 /AN2 5 A11 47 CS4 /TMIO 3/TP11/PB3 48 79 4 78 P71 /AN1 CS5 /TMO2/TP10/PB2 P70 /AN0 3 A12 CS6 /TMIO 1/TP9/PB1 A13 49 2 50 77 1 76 VREF VCC/VCL* CS7/TMO0/TP8/PB0 AV CC Note: * VCL pin in 5 V operation models, VCC pin in 3 V operation models. An external capacitor must be connected to the VCL pin. 1 0.1 F Figure 1.2 Pin Arrangement of H8/3008 (FP-100B or TFP-100B Package, Top View) 7 1.3.2 Pin Functions Table 1.3 summarizes the pin functions. The 5 V operation models have a VCL pin, and require the connection of an external capacitor. Table 1.3 Pin Functions Pin No. Type Symbol FP-100B TFP-100B I/O Name and Function Power VCC 1*, 35, 68 Input Power: For connection to the power supply. Connect all V CC pins to the system power supply. VSS 11, 22, 44, 57, 65, 92 Input Ground: For connection to ground (0 V). Connect all V SS pins to the 0-V system power supply. Internal step-down pin VCL 1* Output Connect an external capacitor between this pin and GND (0 V). Do not connect to V CC. Clock XTAL 67 Input For connection to a crystal resonator. For examples of crystal resonator and external clock input, see section 20, Clock Pulse Generator. EXTAL 66 Input For connection to a crystal resonator or input of an external clock signal. For examples of crystal resonator and external clock input, see section 20, Clock Pulse Generator. 61 Output System clock: Supplies the system clock to external devices. MD2 to MD0 75 to 73 Input Mode 2 to mode 0: For setting the operating mode, as follows. Inputs at these pins must not be changed during operation. Operating mode control 8 VCL 0.1 F MD2 MD1 MD0 Operating Mode 0 0 0 Setting prohibited 0 0 1 Mode 1 0 1 0 Mode 2 0 1 1 Mode 3 1 0 0 Mode 4 1 0 1 Setting prohibited 1 1 0 Setting prohibited 1 1 1 Setting prohibited Pin No. Type Symbol FP-100B TFP-100B I/O Name and Function System control RES 63 Input Reset input: When driven low, this pin resets the chip. This pin must be driven low at power-up. RESO 10 Output Reset output: Outputs the reset signal generated by the watchdog timer to external devices STBY 62 Input Standby: When driven low, this pin forces a transition to hardware standby mode BREQ 59 Input Bus request: Used by an external bus master to request the bus right BACK 60 Output Bus request acknowledge: Indicates that the bus has been granted to an external bus master NMI 64 Input Nonmaskable interrupt: Requests a nonmaskable interrupt IRQ5 to IRQ0 17, 16, 90 to 87 Input Interrupt request 5 to 0: Maskable interrupt request pins Address bus A23 to A 0 97 to 100, 56 to 45, 43 to 36 Output Address bus: Outputs address signals Data bus D15 to D0 34 to 23, 21 to 18 Input/ output Data bus: Bidirectional data bus Bus control CS 7 to CS 0 2 to 5, 88 to 91 Output Chip select: Select signals for areas 7 to 0 AS 69 Output Address strobe: Goes low to indicate valid address output on the address bus RD 70 Output Read: Goes low to indicate reading from the external address space HWR 71 Output High write: Goes low to indicate writing to the external address space; indicates valid data on the upper data bus (D15 to D8). LWR 72 Output Low write: Goes low to indicate writing to the external address space; indicates valid data on the lower data bus (D 7 to D0). WAIT 58 Input Wait: Requests insertion of wait states in bus cycles during access to the external address space Interrupts 9 Pin No. FP-100B TFP-100B I/O Name and Function TCLKD to TCLKA 96 to 93 Input Clock input D to A: External clock inputs TIOCA2 to TIOCA0 99, 97, 95 Input/ output Input capture/output compare A2 to A0: GRA2 to GRA0 output compare or input capture, or PWM output TIOCB2 to TIOCB0 100, 98, 96 Input/ output Input capture/output compare B2 to B0: GRB2 to GRB0 output compare or input capture TMO0, TMO2 2, 4 Output Compare match output: Compare match output pins TMIO1, TMIO3 3, 5 Input/ output Input capture input/compare match output: Input capture input or compare match output pins TCLKD to TCLKA 96 to 93 Input Counter external clock input: These pins input an external clock to the counters. TP 15 to Programmable timing TP 0 pattern controller (TPC) 9 to 2, 100 to 93 Output TPC output 15 to 0: Pulse output Serial communication interface (SCI) TxD1, TxD0 13, 12 Output Transmit data (channels 0, 1): SCI data output RxD1, RxD0 15, 14 Input Receive data (channels 0, 1): SCI data input SCK 1, SCK 0 17, 16 Input/ output Serial clock (channels 0, 1): SCI clock input/output AN 7 to AN 0 85 to 78 Input Analog 7 to 0: Analog input pins ADTRG 90 Input A/D conversion external trigger input: External trigger input for starting A/D conversion D/A converter DA 1, DA 0 85, 84 Output Analog output: Analog output from the D/A converter Analog power supply AVCC 76 Input Power supply pin for the A/D and D/A converters. Connect to the system power supply when not using the A/D and D/A converters. AVSS 86 Input Ground pin for the A/D and D/A converters. Connect to system ground (0 V). VREF 77 Input Reference voltage input pin for the A/D and D/A converters. Connect to the system power supply when not using the A/D and D/A converters. Type Symbol 16-bit timer 8-bit timer A/D converter 10 Pin No. FP-100B TFP-100B I/O Name and Function P47 to P4 0 26 to 23, 21 to 18 Input/ output Port 4: Eight input/output pins. The direction of each pin can be selected in the port 4 data direction register (P4DDR). P67, P65 to P6 0 61, 60 to 58 Input/ output Port 6: Eight input/output pins. The direction of each pin can be selected in the port 6 data direction register (P6DDR). P77 to P7 0 85 to 78 Input Port 7: Eight input pins P84 to P8 0 91 to 87 Input/ output Port 8: Five input/output pins. The direction of each pin can be selected in the port 8 data direction register (P8DDR). P95 to P9 0 17 to 12 Input/ output Port 9: Six input/output pins. The direction of each pin can be selected in the port 9 data direction register (P9DDR). PA7 to PA 0 100 to 93 Input/ output Port A: Eight input/output pins. The direction of each pin can be selected in the port A data direction register (PADDR). PB7 to PB 0 9 to 2 Input/ output Port B: Eight input/output pins. The direction of each pin can be selected in the port B data direction register (PBDDR). Type Symbol I/O ports Note: * In 5 V operation models. This is a VCC pin in 3 V operation models. 11 1.3.3 Pin Assignments in Each Mode Table 1.4 lists the pin assignments in each mode. Table 1.4 Pin Assignments in Each Mode (FP-100B, TFP-100B) Pin No. FP-100B TFP-100B Pin Name Mode 1 Mode 2 3 Mode 3 Mode 4 1 vCC (v CL)* vCC (v CL)* vCC (v CL)* vCC (v CL)*3 2 PB 0/TP8/TMO0/CS7 PB 0/TP8/TMO0/CS7 PB 0/TP8/TMO0/CS7 PB 0/TP8/TMO0/CS7 3 PB 1/TP9/TMIO1/CS6 PB 1/TP9/TMIO1/CS6 PB 1/TP9/TMIO1/CS6 PB 1/TP9/TMIO1/CS6 4 PB 2/TP10/TMO2/CS5 PB 2/TP10/TMO2/CS5 PB 2/TP10/TMO2/CS5 PB 2/TP10/TMO2/CS5 5 PB 3/TP11/TMIO3/CS4 PB 3/TP11/TMIO3/CS4 PB 3/TP11/TMIO3/CS4 PB 3/TP11/TMIO3/CS4 6 PB 4/TP12 PB 4/TP12 PB 4/TP12 PB 4/TP12 7 PB 5/TP13 PB 5/TP13 PB 5/TP13 PB 5/TP13 8 PB 6/TP14 PB 6/TP14 PB 6/TP14 PB 6/TP14 9 PB 7/TP15 PB 7/TP15 PB 7/TP15 PB 7/TP15 10 RESO RESO RESO RESO 11 VSS VSS VSS VSS 12 P90/TxD0 P90/TxD0 P90/TxD0 P90/TxD0 13 P91/TxD1 P91/TxD1 P91/TxD1 P91/TxD1 14 P92/RxD0 P92/RxD0 P92/RxD0 P92/RxD0 15 P93/RxD1 P93/RxD1 P93/RxD1 P93/RxD1 16 P94/SCK 0/IRQ4 P94/SCK 0/IRQ4 P94/SCK 0/IRQ4 P94/SCK 0/IRQ4 17 P95/SCK 1/IRQ5 P95/SCK 1/IRQ5 P95/SCK 1/IRQ5 P95/SCK 1/IRQ5 18 P40/D0*1 P40/D0*2 P40/D0*1 P40/D0*2 19 1 P41/D1* 2 P41/D1* 1 P41/D1* P41/D1*2 20 P42/D2*1 P42/D2*2 P42/D2*1 P42/D2*2 21 P43/D3*1 P43/D3*2 P43/D3*1 P43/D3*2 22 VSS VSS VSS VSS 2 3 23 P44/D4* P44/D4* P44/D4* P44/D4*2 24 P45/D5*1 P45/D5*2 P45/D5*1 P45/D5*2 25 P46/D6*1 P46/D6*2 P46/D6*1 P46/D6*2 26 P47/D7*1 P47/D7*2 P47/D7*1 P47/D7*2 27 D8 D8 D8 D8 28 D9 D9 D9 D9 29 D10 D10 D10 D10 12 1 3 1 Pin No. Pin Name FP-100B TFP-100B Mode 1 Mode 2 Mode 3 Mode 4 30 D11 D11 D11 D11 31 D12 D12 D12 D12 32 D13 D13 D13 D13 33 D14 D14 D14 D14 34 D15 D15 D15 D15 35 VCC VCC VCC VCC 36 A0 A0 A0 A0 37 A1 A1 A1 A1 38 A2 A2 A2 A2 39 A3 A3 A3 A3 40 A4 A4 A4 A4 41 A5 A5 A5 A5 42 A6 A6 A6 A6 43 A7 A7 A7 A7 44 VSS VSS VSS VSS 45 A8 A8 A8 A8 46 A9 A9 A9 A9 47 A10 A10 A10 A10 48 A11 A11 A11 A11 49 A12 A12 A12 A12 50 A13 A13 A13 A13 51 A14 A14 A14 A14 52 A15 A15 A15 A15 53 A16 A16 A16 A16 54 A17 A17 A17 A17 55 A18 A18 A18 A18 56 A19 A19 A19 A19 57 VSS VSS VSS VSS 58 P60/WAIT P60/WAIT P60/WAIT P60/WAIT 59 P61/BREQ P61/BREQ P61/BREQ P61/BREQ 60 P62/BACK P62/BACK P62/BACK P62/BACK 61 62 STBY STBY STBY STBY 63 RES RES RES RES 13 Pin No. Pin Name FP-100B TFP-100B Mode 1 Mode 2 Mode 3 Mode 4 64 NMI NMI NMI NMI 65 VSS VSS VSS VSS 66 EXTAL EXTAL EXTAL EXTAL 67 XTAL XTAL XTAL XTAL 68 VCC VCC VCC VCC 69 AS AS AS AS 70 RD RD RD RD 71 HWR HWR HWR HWR 72 LWR LWR LWR LWR 73 MD0 MD0 MD0 MD0 74 MD1 MD1 MD1 MD1 75 MD2 MD2 MD2 MD2 76 AV CC AV CC AV CC AV CC 77 VREF VREF VREF VREF 78 P70/AN0 P70/AN0 P70/AN0 P70/AN0 79 P71/AN1 P71/AN1 P71/AN1 P71/AN1 80 P72/AN2 P72/AN2 P72/AN2 P72/AN2 81 P73/AN3 P73/AN3 P73/AN3 P73/AN3 82 P74/AN4 P74/AN4 P74/AN4 P74/AN4 83 P75/AN5 P75/AN5 P75/AN5 P75/AN5 84 P76/AN6/DA0 P76/AN6/DA0 P76/AN6/DA0 P76/AN6/DA0 85 P77/AN7/DA1 P77/AN7/DA1 P77/AN7/DA1 P77/AN7/DA1 86 AV SS AV SS AV SS AV SS 87 P80/IRQ0 P80/IRQ0 P80/IRQ0 P80/IRQ0 88 P81/IRQ1/CS3 P81/IRQ1/CS3 P81/IRQ1/CS3 P81/IRQ1/CS3 89 P82/IRQ2/CS2 P82/IRQ2/CS2 P82/IRQ2/CS2 P82/IRQ2/CS2 90 P83/IRQ3/CS1/ADTRG P83/IRQ3/CS1/ADTRG P83/IRQ3/CS1/ADTRG P83/IRQ3/CS1/ADTRG 91 P84/CS0 P84/CS0 P84/CS0 P84/CS0 92 VSS VSS VSS VSS 93 PA 0/TP0/TCLKA PA 0/TP0/TCLKA PA 0/TP0/TCLKA PA 0/TP0/TCLKA 94 PA 1/TP1/TCLKB PA 1/TP1/TCLKB PA 1/TP1/TCLKB PA 1/TP1/TCLKB 95 PA 2/TP2/TIOCA 0/ TCLKC PA 2/TP2/TIOCA 0/ TCLKC PA 2/TP2/TIOCA 0/ TCLKC PA 2/TP2/TIOCA 0/ TCLKC 96 PA 3/TP3/TIOCB 0/ TCLKD PA 3/TP3/TIOCB 0/ TCLKD PA 3/TP3/TIOCB 0/ TCLKD PA 3/TP3/TIOCB 0/ TCLKD 14 Pin No. Pin Name FP-100B TFP-100B Mode 1 Mode 2 Mode 3 Mode 4 97 PA 4/TP4/TIOCA 1 PA 4/TP4/TIOCA 1 PA 4/TP4/TIOCA 1/A 23 PA 4/TP4/TIOCA 1/A 23 98 PA 5/TP5/TIOCB 1 PA 5/TP5/TIOCB 1 PA 5/TP5/TIOCB 1/A 22 PA 5/TP5/TIOCB 1/A 22 99 PA 6/TP6/TIOCA 2 PA 6/TP6/TIOCA 2 PA 6/TP6/TIOCA 2/A 21 PA 6/TP6/TIOCA 2/A 21 100 PA 7/TP7/TIOCB 2 PA 7/TP7/TIOCB 2 A20 A20 Notes: *1 In modes 1 and 3 the P40 to P4 7 functions of pins P40/D0 to P4 7/D7 are selected after a reset, but they can be changed by software. *2 In modes 2 and 4 the D 0 to D7 functions of pins P40/D0 to P4 7/D7 are selected after a reset, but they can be changed by software. *3 This pin functions as V CL in 5 V operation models, and as VCC in 3 V operation models. 15 16 Section 2 CPU 2.1 Overview The H8/300H CPU is a high-speed central processing unit with an internal 32-bit architecture that is upward-compatible with the H8/300 CPU. The H8/300H CPU has sixteen 16-bit general registers, can address a 16-Mbyte linear address space, and is ideal for realtime control. 2.1.1 Features The H8/300H CPU has the following features. * Upward compatibility with H8/300 CPU Can execute H8/300 Series object programs * General-register architecture Sixteen 16-bit general registers (also usable as sixteen 8-bit registers or eight 32-bit registers) * 64 basic instructions 8/16/32-bit arithmetic and logic instructions Multiply and divide instructions Powerful bit-manipulation instructions * Eight addressing modes Register direct [Rn] Register indirect [@ERn] Register indirect with displacement [@(d:16, ERn) or @(d:24, ERn)] Register indirect with post-increment or pre-decrement [@ERn+ or @-ERn] Absolute address [@aa:8, @aa:16, or @aa:24] Immediate [#xx:8, #xx:16, or #xx:32] Program-counter relative [@(d:8, PC) or @(d:16, PC)] Memory indirect [@@aa:8] * 16-Mbyte linear address space * High-speed operation All frequently-used instructions execute in two to four states Maximum clock frequency: 25 MHz 8/16/32-bit register-register add/subtract: 80 ns@25 MHz 8 x 8-bit register-register multiply: 560 ns@25 MHz 16 / 8-bit register-register divide: 560 ns@25 MHz 16 x 16-bit register-register multiply: 880 ns@25 MHz 32 / 16-bit register-register divide: 880 ns@25 MHz 17 * Two CPU operating modes Normal mode Advanced mode * Low-power mode Transition to power-down state by SLEEP instruction 2.1.2 Differences from H8/300 CPU In comparison to the H8/300 CPU, the H8/300H has the following enhancements. * More general registers Eight 16-bit registers have been added. * Expanded address space Advanced mode supports a maximum 16-Mbyte address space. Normal mode supports the same 64-kbyte address space as the H8/300 CPU. * Enhanced addressing The addressing modes have been enhanced to make effective use of the 16-Mbyte address space. * Enhanced instructions Data transfer, arithmetic, and logic instructions can operate on 32-bit data. Signed multiply/divide instructions and other instructions have been added. 2.2 CPU Operating Modes The H8/300H CPU has two operating modes: normal and advanced. Normal mode supports a maximum 64-kbyte address space. Advanced mode supports up to 16 Mbytes. Normal mode Maximum 64 kbytes, program and data areas combined Advanced mode Maximum 16 Mbytes, program and data areas combined CPU operating modes Figure 2.1 CPU Operating Modes 18 2.3 Address Space Figure 2.2 shows a simple memory map for the H8/3008. The H8/300H CPU can address a linear address space with a maximum size of 64 kbytes in normal mode, and 16 Mbytes in advanced mode. For further details see section 3.6, Memory Map in Each Operating Mode. The 1-Mbyte operating modes use 20-bit addressing. The upper 4 bits of effective addresses are ignored. H'0000 H'00000 H'000000 H'FFFF H'FFFFF H'FFFFFF a. 1-Mbyte mode Normal mode b. 16-Mbyte mode Advanced mode Figure 2.2 Memory Map 19 2.4 Register Configuration 2.4.1 Overview The H8/300H CPU has the internal registers shown in figure 2.3. There are two types of registers: general registers and control registers. General Registers (ERn) 15 0 7 0 7 0 ER0 E0 R0H R0L ER1 E1 R1H R1L ER2 E2 R2H R2L ER3 E3 R3H R3L ER4 E4 R4H R4L ER5 E5 R5H R5L ER6 E6 R6H R6L ER7 E7 R7H R7L (SP) Control Registers (CR) 23 0 PC 7 6 5 4 3 2 1 0 CCR I UI H U N Z V C Legend: SP: Stack pointer PC: Program counter CCR: Condition code register Interrupt mask bit I: User bit or interrupt mask bit UI: Half-carry flag H: User bit U: Negative flag N: Zero flag Z: Overflow flag V: Carry flag C: Figure 2.3 CPU Registers 20 2.4.2 General Registers The H8/300H CPU has eight 32-bit general registers. These general registers are all functionally alike and can be used without distinction between data registers and address registers. When a general register is used as a data register, it can be accessed as a 32-bit, 16-bit, or 8-bit register. When the general registers are used as 32-bit registers or as address registers, they are designated by the letters ER (ER0 to ER7). The ER registers divide into 16-bit general registers designated by the letters E (E0 to E7) and R (R0 to R7). These registers are functionally equivalent, providing a maximum sixteen 16-bit registers. The E registers (E0 to E7) are also referred to as extended registers. The R registers divide into 8-bit general registers designated by the letters RH (R0H to R7H) and RL (R0L to R7L). These registers are functionally equivalent, providing a maximum sixteen 8-bit registers. Figure 2.4 illustrates the usage of the general registers. The usage of each register can be selected independently. * Address registers * 32-bit registers * 16-bit registers * 8-bit registers E registers (extended registers) E0 to E7 RH registers R0H to R7H ER registers ER0 to ER7 R registers R0 to R7 RL registers R0L to R7L Figure 2.4 Usage of General Registers General register ER7 has the function of stack pointer (SP) in addition to its general-register function, and is used implicitly in exception handling and subroutine calls. Figure 2.5 shows the stack. 21 Free area SP (ER7) Stack area Figure 2.5 Stack 2.4.3 Control Registers The control registers are the 24-bit program counter (PC) and the 8-bit condition code register (CCR). Program Counter (PC): This 24-bit counter indicates the address of the next instruction the CPU will execute. The length of all CPU instructions is 2 bytes (one word), so the least significant PC bit is ignored. When an instruction is fetched, the least significant PC bit is regarded as 0. Condition Code Register (CCR): This 8-bit register contains internal CPU status information, including the interrupt mask bit (I) and half-carry (H), negative (N), zero (Z), overflow (V), and carry (C) flags. Bit 7--Interrupt Mask Bit (I): Masks interrupts other than NMI when set to 1. NMI is accepted regardless of the I bit setting. The I bit is set to 1 at the start of an exception-handling sequence. Bit 6--User Bit or Interrupt Mask Bit (UI): Can be written and read by software using the LDC, STC, ANDC, ORC, and XORC instructions. This bit can also be used as an interrupt mask bit. For details see section 5, Interrupt Controller. Bit 5--Half-Carry Flag (H): When the ADD.B, ADDX.B, SUB.B, SUBX.B, CMP.B, or NEG.B instruction is executed, this flag is set to 1 if there is a carry or borrow at bit 3, and cleared to 0 otherwise. When the ADD.W, SUB.W, CMP.W, or NEG.W instruction is executed, the H flag is set to 1 if there is a carry or borrow at bit 11, and cleared to 0 otherwise. When the ADD.L, SUB.L, CMP.L, or NEG.L instruction is executed, the H flag is set to 1 if there is a carry or borrow at bit 27, and cleared to 0 otherwise. Bit 4--User Bit (U): Can be written and read by software using the LDC, STC, ANDC, ORC, and XORC instructions. Bit 3--Negative Flag (N): Stores the value of the most significant bit of data, regarded as the sign bit. Bit 2--Zero Flag (Z): Set to 1 to indicate zero data, and cleared to 0 to indicate non-zero data. 22 Bit 1--Overflow Flag (V): Set to 1 when an arithmetic overflow occurs, and cleared to 0 at other times. Bit 0--Carry Flag (C): Set to 1 when a carry is generated by execution of an operation, and cleared to 0 otherwise. Used by: * Add instructions, to indicate a carry * Subtract instructions, to indicate a borrow * Shift and rotate instructions The carry flag is also used as a bit accumulator by bit manipulation instructions. Some instructions leave flag bits unchanged. Operations can be performed on CCR by the LDC, STC, ANDC, ORC, and XORC instructions. The N, Z, V, and C flags are used by conditional branch (Bcc) instructions. For the action of each instruction on the flag bits, see appendix A.1, Instruction List. For the I and UI bits, see section 5, Interrupt Controller. 2.4.4 Initial CPU Register Values In reset exception handling, PC is initialized to a value loaded from the vector table, and the I bit in CCR is set to 1. The other CCR bits and the general registers are not initialized. In particular, the initial value of the stack pointer (ER7) is also undefined. The stack pointer (ER7) must therefore be initialized by an MOV.L instruction executed immediately after a reset. 23 2.5 Data Formats The H8/300H CPU can process 1-bit, 4-bit (BCD), 8-bit (byte), 16-bit (word), and 32-bit (longword) data. Bit-manipulation instructions operate on 1-bit data by accessing bit n (n = 0, 1, 2, ..., 7) of byte operand data. The DAA and DAS decimal-adjust instructions treat byte data as two digits of 4-bit BCD data. 2.5.1 General Register Data Formats Figures 2.6 and 2.7 show the data formats in general registers. Data Type General Register 1-bit data RnH 7 6 5 4 3 2 1 0 1-bit data RnL Don't care 4-bit BCD data RnH Upper digit Lower digit 4-bit BCD data RnL Don't care Byte data RnH Data Format 7 0 Don't care 7 7 4 3 0 Don't care 7 7 Byte data 0 Don't care LSB 7 0 MSB LSB Don't care Legend: RnH: General register RH RnL: General register RL Figure 2.6 General Register Data Formats 24 4 3 Upper digit Lower digit 0 MSB RnL 0 7 6 5 4 3 2 1 0 Data Type General Register Word data Rn Word data Data Format 15 0 MSB LSB 15 0 MSB LSB En 31 16 15 0 Longword data ERn MSB LSB Legend: ERn: General register En: General register E Rn: General register R MSB: Most significant bit LSB: Least significant bit Figure 2.7 General Register Data Formats 2.5.2 Memory Data Formats Figure 2.8 shows the data formats on memory. The H8/300H CPU can access word data and longword data on memory, but word or longword data must begin at an even address. If an attempt is made to access word or longword data at an odd address, no address error occurs but the least significant bit of the address is regarded as 0, so the access starts at the preceding address. This also applies to instruction fetches. 25 Data Type Address Data Format 1-bit data Address L 7 Byte data Address L MSB Word data Address 2M MSB 7 0 6 5 4 Address 2M + 1 Address 2N Longword data 3 2 1 0 LSB LSB MSB Address 2N + 1 Address 2N + 2 Address 2N + 3 LSB Figure 2.8 Memory Data Formats When ER7 (SP) is used as an address register to access the stack, the operand size should be word size or longword size. 26 2.6 Instruction Set 2.6.1 Instruction Set Overview The H8/300H CPU has 64 types of instructions, which are classified in table 2.1. Table 2.1 Instruction Classification Function Instruction Types 1 1 2 2 Data transfer MOV, PUSH* , POP* , MOVTPE* , MOVFPE* 5 Arithmetic operations ADD, SUB, ADDX, SUBX, INC, DEC, ADDS, SUBS, DAA, DAS, 18 MULXU, MULXS, DIVXU, DIVXS, CMP, NEG, EXTS, EXTU Logic operations AND, OR, XOR, NOT 4 Shift operations SHAL, SHAR, SHLL, SHLR, ROTL, ROTR, ROTXL, ROTXR 8 Bit manipulation BSET, BCLR, BNOT, BTST, BAND, BIAND, BOR, BIOR, BXOR, 14 BIXOR, BLD, BILD, BST, BIST Branch Bcc* 3, JMP, BSR, JSR, RTS 5 System control TRAPA, RTE, SLEEP, LDC, STC, ANDC, ORC, XORC, NOP 9 Block data transfer EEPMOV 1 Total 64 types Notes: *1 POP.W Rn is identical to MOV.W @SP+, Rn. PUSH.W Rn is identical to MOV.W Rn, @-SP. POP.L ERn is identical to MOV.L @SP+, Rn. PUSH.L ERn is identical to MOV.L Rn, @-SP. *2 Not available in the H8/3008. *3 Bcc is a generic branching instruction. 27 2.6.2 Instructions and Addressing Modes Table 2.2 indicates the instructions available in the H8/300H CPU. Table 2.2 Instructions and Addressing Modes Addressing Modes @ (d:24, ERn) @ERn+/ @-ERn @ aa:8 @ aa:16 @ aa:24 @ (d:8, PC) @ (d:16, PC) @@ aa:8 -- -- Function Instruction #xx Rn @ERn @ (d:16, ERn) Data transfer MOV BWL BWL BWL BWL BWL BWL B BWL BWL -- -- -- POP, PUSH -- -- -- -- -- -- -- -- -- -- -- -- WL MOVFPE, -- -- -- -- -- -- -- -- -- -- -- -- -- ADD, CMP BWL BWL -- -- -- -- -- -- -- -- -- -- -- SUB WL BWL -- -- -- -- -- -- -- -- -- -- -- ADDX, SUBX B B -- -- -- -- -- -- -- -- -- -- -- ADDS, SUBS -- L -- -- -- -- -- -- -- -- -- -- -- INC, DEC -- BWL -- -- -- -- -- -- -- -- -- -- -- DAA, DAS -- B -- -- -- -- -- -- -- -- -- -- -- MULXU, -- BW -- -- -- -- -- -- -- -- -- -- -- NEG -- BWL -- -- -- -- -- -- -- -- -- -- -- EXTU, EXTS -- MOVTPE Arithmetic operations MULXS, DIVXU, DIVXS Logic operations WL -- -- -- -- -- -- -- -- -- -- -- AND, OR, XOR -- BWL -- -- -- -- -- -- -- -- -- -- -- NOT -- BWL -- -- -- -- -- -- -- -- -- -- -- Shift instructions -- BWL -- -- -- -- -- -- -- -- -- -- -- Bit manipulation -- B B -- -- -- B -- -- -- -- -- -- Branch Bcc, BSR -- -- -- -- -- -- -- -- -- -- -- -- -- JMP, JSR -- -- -- -- -- -- -- -- -- -- RTS -- -- -- -- -- -- -- System control -- -- -- -- TRAPA -- -- -- -- -- -- -- -- -- -- -- RTE -- -- -- -- -- -- -- -- -- -- -- -- SLEEP -- -- -- -- -- -- -- -- -- -- -- -- LDC B B W W W W -- W W -- -- -- STC -- B W W W W -- W W -- -- -- -- ANDC, ORC, XORC B -- -- -- -- -- -- -- -- -- -- -- -- NOP -- -- -- -- -- -- -- -- -- -- -- -- Block data transfer -- -- -- -- -- -- -- -- -- -- -- -- 28 -- BW 2.6.3 Tables of Instructions Classified by Function Tables 2.3 to 2.10 summarize the instructions in each functional category. The operation notation used in these tables is defined next. Operation Notation Rd General register (destination)* Rs General register (source)* Rn General register* ERn General register (32-bit register or address register)* (EAd) Destination operand (EAs) Source operand CCR Condition code register N N (negative) flag of CCR Z Z (zero) flag of CCR V V (overflow) flag of CCR C C (carry) flag of CCR PC Program counter SP Stack pointer #IMM Immediate data disp Displacement + Addition - Subtraction x Multiplication / Division AND logical OR logical Exclusive OR logical Move NOT (logical complement) :3/:8/:16/:24 3-, 8-, 16-, or 24-bit length Note: * General registers include 8-bit registers (R0H to R7H, R0L to R7L), 16-bit registers (R0 to R7, E0 to E7), and 32-bit data or address registers (ER0 to ER7). 29 Table 2.3 Data Transfer Instructions Instruction Size* Function MOV (EAs) Rd, Rs (EAd) B/W/L Moves data between two general registers or between a general register and memory, or moves immediate data to a general register. MOVFPE B (EAs) Rd Cannot be used in the H8/3008. MOVTPE B Rs (EAs) Cannot be used in the H8/3008. POP W/L @SP+ Rn Pops a general register from the stack. POP.W Rn is identical to MOV.W @SP+, Rn. Similarly, POP.L ERn is identical to MOV.L @SP+, ERn. PUSH W/L Rn @-SP Pushes a general register onto the stack. PUSH.W Rn is identical to MOV.W Rn, @-SP. Similarly, PUSH.L ERn is identical to MOV.L ERn, @-SP. Note: * Size refers to the operand size. B: Byte W: Word L: Longword 30 Table 2.4 Arithmetic Operation Instructions Instruction Size* Function ADD,SUB Rd Rs Rd, Rd #IMM Rd B/W/L Performs addition or subtraction on data in two general registers, or on immediate data and data in a general register. (Immediate byte data cannot be subtracted from data in a general register. Use the SUBX or ADD instruction.) ADDX, SUBX B INC, DEC B/W/L ADDS, SUBS L DAA, DAS B MULXU B/W Rd Rs C Rd, Rd #IMM C Rd Performs addition or subtraction with carry or borrow on data in two general registers, or on immediate data and data in a general register. Rd 1 Rd, Rd 2 Rd Increments or decrements a general register by 1 or 2. (Byte operands can be incremented or decremented by 1 only.) Rd 1 Rd, Rd 2 Rd, Rd 4 Rd Adds or subtracts the value 1, 2, or 4 to or from data in a 32-bit register. Rd decimal adjust Rd Decimal-adjusts an addition or subtraction result in a general register by referring to CCR to produce 4-bit BCD data. Rd x Rs Rd Performs unsigned multiplication on data in two general registers: either 8 bits x 8 bits 16 bits or 16 bits x 16 bits 32 bits. MULXS B/W Rd x Rs Rd Performs signed multiplication on data in two general registers: either 8 bits x 8 bits 16 bits or 16 bits x 16 bits 32 bits. 31 Instruction Size* Function DIVXU Rd / Rs Rd B/W Performs unsigned division on data in two general registers: either 16 bits / 8 bits 8-bit quotient and 8-bit remainder or 32 bits / 16 bits 16-bit quotient and 16-bit remainder DIVXS B/W Rd / Rs Rd Performs signed division on data in two general registers: either 16 bits / 8 bits 8-bit quotient and 8-bit remainder, or 32 bits / 16 bits 16-bit quotient and 16-bit remainder CMP B/W/L Rd - Rs, Rd - #IMM Compares data in a general register with data in another general register or with immediate data, and sets CCR according to the result. NEG B/W/L 0 - Rd Rd Takes the two's complement (arithmetic complement) of data in a general register. EXTS W/L Rd (sign extension) Rd Extends byte data in the lower 8 bits of a 16-bit register to word data, or extends word data in the lower 16 bits of a 32-bit register to longword data, by extending the sign bit. EXTU W/L Rd (zero extension) Rd Extends byte data in the lower 8 bits of a 16-bit register to word data, or extends word data in the lower 16 bits of a 32-bit register to longword data, by padding with zeros. Note: * Size refers to the operand size. B: Byte W: Word L: Longword 32 Table 2.5 Logic Operation Instructions Instruction Size* Function AND Rd Rs Rd, Rd #IMM Rd B/W/L Performs a logical AND operation on a general register and another general register or immediate data. OR B/W/L Rd Rs Rd, Rd #IMM Rd Performs a logical OR operation on a general register and another general register or immediate data. XOR B/W/L Rd Rs Rd, Rd #IMM Rd Performs a logical exclusive OR operation on a general register and another general register or immediate data. NOT B/W/L Rd Rd Takes the one's complement (logical complement) of general register contents. Note: * Size refers to the operand size. B: Byte W: Word L: Longword Table 2.6 Shift Instructions Instruction Size* Function SHAL, SHAR B/W/L Rd (shift) Rd SHLL, SHLR B/W/L ROTL, ROTR B/W/L ROTXL, ROTXR B/W/L Performs an arithmetic shift on general register contents. Rd (shift) Rd Performs a logical shift on general register contents. Rd (rotate) Rd Rotates general register contents. Rd (rotate) Rd Rotates general register contents, including the carry bit. Note: * Size refers to the operand size. B: Byte W: Word L: Longword 33 Table 2.7 Bit Manipulation Instructions Instruction Size* Function BSET 1 (<bit-No.> of <EAd>) B Sets a specified bit in a general register or memory operand to 1. The bit number is specified by 3-bit immediate data or the lower 3 bits of a general register. BCLR B 0 (<bit-No.> of <EAd>) Clears a specified bit in a general register or memory operand to 0. The bit number is specified by 3-bit immediate data or the lower 3 bits of a general register. BNOT B (<bit-No.> of <EAd>) (<bit-No.> of <EAd>) Inverts a specified bit in a general register or memory operand. The bit number is specified by 3-bit immediate data or the lower 3 bits of a general register. BTST B (<bit-No.> of <EAd>) Z Tests a specified bit in a general register or memory operand and sets or clears the Z flag accordingly. The bit number is specified by 3-bit immediate data or the lower 3 bits of a general register. BAND B C (<bit-No.> of <EAd>) C ANDs the carry flag with a specified bit in a general register or memory operand and stores the result in the carry flag. The bit number is specified by 3-bit immediate data. BIAND B C [ (<bit-No.> of <EAd>)] C ANDs the carry flag with the inverse of a specified bit in a general register or memory operand and stores the result in the carry flag. The bit number is specified by 3-bit immediate data. 34 Instruction Size* Function BOR C (<bit-No.> of <EAd>) C B ORs the carry flag with a specified bit in a general register or memory operand and stores the result in the carry flag. The bit number is specified by 3-bit immediate data. BIOR B C [ (<bit-No.> of <EAd>)] C ORs the carry flag with the inverse of a specified bit in a general register or memory operand and stores the result in the carry flag. The bit number is specified by 3-bit immediate data. BXOR B C (<bit-No.> of <EAd>) C Exclusive-ORs the carry flag with a specified bit in a general register or memory operand and stores the result in the carry flag. The bit number is specified by 3-bit immediate data. BIXOR B C [ (<bit-No.> of <EAd>)] C Exclusive-ORs the carry flag with the inverse of a specified bit in a general register or memory operand and stores the result in the carry flag. The bit number is specified by 3-bit immediate data. BLD B (<bit-No.> of <EAd>) C Transfers a specified bit in a general register or memory operand to the carry flag. The bit number is specified by 3-bit immediate data. BILD B (<bit-No.> of <EAd>) C Transfers the inverse of a specified bit in a general register or memory operand to the carry flag. The bit number is specified by 3-bit immediate data. BST B C (<bit-No.> of <EAd>) Transfers the carry flag value to a specified bit in a general register or memory operand. The bit number is specified by 3-bit immediate data. BIST B C (<bit-No.> of <EAd>) Transfers the inverse of the carry flag value to a specified bit in a general register or memory operand. The bit number is specified by 3-bit immediate data. Note: * Size refers to the operand size. B: Byte 35 Table 2.8 Branching Instructions Instruction Size Function Bcc Branches to a specified address if address specified condition is met. The branching conditions are listed below. -- Mnemonic Description Condition BRA (BT) Always (true) Always BRN (BF) Never (false) Never BHI High CZ=0 BLS Low or same CZ=1 Bcc (BHS) Carry clear (high or same) C = 0 BCS (BLO) Carry set (low) C=1 BNE Not equal Z=0 BEQ Equal Z=1 BVC Overflow clear V=0 BVS Overflow set V=1 BPL Plus N=0 BMI Minus N=1 BGE Greater or equal NV=0 BLT Less than NV=1 BGT Greater than Z (N V) = 0 BLE Less or equal Z (N V) = 1 JMP -- Branches unconditionally to a specified address BSR -- Branches to a subroutine at a specified address JSR -- Branches to a subroutine at a specified address RTS -- Returns from a subroutine 36 Table 2.9 System Control Instructions Instruction Size* Function TRAPA -- Starts trap-instruction exception handling RTE -- Returns from an exception-handling routine SLEEP -- Causes a transition to the power-down state LDC B/W (EAs) CCR Moves the source operand contents to the condition code register. The condition code register size is one byte, but in transfer from memory, data is read by word access. STC B/W CCR (EAd) Transfers the CCR contents to a destination location. The condition code register size is one byte, but in transfer to memory, data is written by word access. ANDC B CCR #IMM CCR Logically ANDs the condition code register with immediate data. ORC B CCR #IMM CCR Logically ORs the condition code register with immediate data. XORC B CCR #IMM CCR Logically exclusive-ORs the condition code register with immediate data. NOP -- PC + 2 PC Only increments the program counter. Note: * Size refers to the operand size. B: Byte W: Word 37 Table 2.10 Block Transfer Instruction Instruction Size Function EEPMOV.B -- if R4L 0 then repeat @ER5+ @ER6+, R4L - 1 R4L until R4L = 0 else next; EEPMOV.W -- if R4 0 then repeat @ER5+ @ER6+, R4 - 1 R4 until R4 = 0 else next; Block transfer instruction. This instruction transfers the number of data bytes specified by R4L or R4, starting from the address indicated by ER5, to the location starting at the address indicated by ER6. At the end of the transfer, the next instruction is executed. 2.6.4 Basic Instruction Formats The H8/300H instructions consist of 2-byte (word) units. An instruction consists of an operation field (OP field), a register field (r field), an effective address extension (EA field), and a condition field (cc). Operation Field: Indicates the function of the instruction, the addressing mode, and the operation to be carried out on the operand. The operation field always includes the first 4 bits of the instruction. Some instructions have two operation fields. Register Field: Specifies a general register. Address registers are specified by 3 bits, data registers by 3 bits or 4 bits. Some instructions have two register fields. Some have no register field. Effective Address Extension: Eight, 16, or 32 bits specifying immediate data, an absolute address, or a displacement. A 24-bit address or displacement is treated as 32-bit data in which the first 8 bits are 0 (H'00). Condition Field: Specifies the branching condition of Bcc instructions. Figure 2.9 shows examples of instruction formats. 38 Operation field only op NOP, RTS, etc. Operation field and register fields op rn rm ADD.B Rn, Rm, etc. Operation field, register fields, and effective address extension op rn rm MOV.B @(d:16, Rn), Rm EA (disp) Operation field, effective address extension, and condition field op cc EA (disp) BRA d:8 Figure 2.9 Instruction Formats 2.6.5 Notes on Use of Bit Manipulation Instructions The BSET, BCLR, BNOT, BST, and BIST instructions read a byte of data, modify a bit in the byte, then write the byte back. Care is required when these instructions are used to access registers with write-only bits, or to access ports. Step Description 1 Read Read one data byte at the specified address 2 Modify Modify one bit in the data byte 3 Write Write the modified data byte back to the specified address Example 1: BCLR is executed to clear bit 0 in the port 4 data direction register (P4DDR) under the following conditions. P4 7, P4 6: Input pins P4 5 - P4 0: Output pins The intended purpose of this BCLR instruction is to switch P40 from output to input. 39 Before Execution of BCLR Instruction P47 P46 P45 P44 P43 P42 P41 P40 Input/output Input Input Output Output Output Output Output Output DDR 0 0 1 1 1 1 1 1 Execution of BCLR Instruction BCLR ; Execute BCLR instruction on DDR #0, P4DDR After Execution of BCLR Instruction P47 P46 P45 P44 P43 P42 P41 P40 Input/output Output Output Output Output Output Output Output Input DDR 1 1 1 1 1 1 1 0 Explanation: To execute the BCLR instruction, the CPU begins by reading P4DDR. Since P4DDR is a write-only register, it is read as H'FF, even though its true value is H'3F. Next the CPU clears bit 0 of the read data, changing the value to H'FE. Finally, the CPU writes this value (H'FE) back to P4DDR to complete the BCLR instruction. As a result, P40DDR is cleared to 0, making P40 an input pin. In addition, P47DDR and P46DDR are set to 1, making P4 7 and P46 output pins. The BCLR instruction can be used to clear flags in the on-chip registers to 0. In the case of the IRQ status register (ISR), for example, a flag must be read as a condition for clearing it, but when using the BCLR instruction, if it is known that a flag has been set to 1 in an interrupt-handling routine, for instance, it is not necessary to read the flag ahead of time. 40 2.7 Addressing Modes and Effective Address Calculation 2.7.1 Addressing Modes The H8/300H CPU supports the eight addressing modes listed in table 2.11. Each instruction uses a subset of these addressing modes. Arithmetic and logic instructions can use the register direct and immediate modes. Data transfer instructions can use all addressing modes except programcounter relative and memory indirect. Bit manipulation instructions use register direct, register indirect, or absolute (@aa:8) addressing mode to specify an operand, and register direct (BSET, BCLR, BNOT, and BTST instructions) or immediate (3-bit) addressing mode to specify a bit number in the operand. Table 2.11 Addressing Modes No. Addressing Mode Symbol 1 Register direct Rn 2 Register indirect @ERn 3 Register indirect with displacement @(d:16, ERn)/@(d:24, ERn) 4 Register indirect with post-increment Register indirect with pre-decrement @ERn+ @-ERn 5 Absolute address @aa:8/@aa:16/@aa:24 6 Immediate #xx:8/#xx:16/#xx:32 7 Program-counter relative @(d:8, PC)/@(d:16, PC) 8 Memory indirect @@aa:8 1 Register Direct--Rn: The register field of the instruction code specifies an 8-, 16-, or 32-bit register containing the operand. R0H to R7H and R0L to R7L can be specified as 8-bit registers. R0 to R7 and E0 to E7 can be specified as 16-bit registers. ER0 to ER7 can be specified as 32-bit registers. 2 Register Indirect--@ERn: The register field of the instruction code specifies an address register (ERn), the lower 24 bits of which contain the address of the operand. 3 Register Indirect with Displacement--@(d:16, ERn) or @(d:24, ERn): A 16-bit or 24-bit displacement contained in the instruction code is added to the contents of an address register (ERn) specified by the register field of the instruction, and the lower 24 bits of the sum specify the address of a memory operand. A 16-bit displacement is sign-extended when added. 41 4 Register Indirect with Post-Increment or Pre-Decrement--@ERn+ or @-ERn: * Register indirect with post-increment--@ERn+ The register field of the instruction code specifies an address register (ERn) the lower 24 bits of which contain the address of a memory operand. After the operand is accessed, 1, 2, or 4 is added to the address register contents (32 bits) and the sum is stored in the address register. The value added is 1 for byte access, 2 for word access, or 4 for longword access. For word or longword access, the register value should be even. * Register indirect with pre-decrement--@-ERn The value 1, 2, or 4 is subtracted from an address register (ERn) specified by the register field in the instruction code, and the lower 24 bits of the result become the address of a memory operand. The result is also stored in the address register. The value subtracted is 1 for byte access, 2 for word access, or 4 for longword access. For word or longword access, the resulting register value should be even. 5 Absolute Address--@aa:8, @aa:16, or @aa:24: The instruction code contains the absolute address of a memory operand. The absolute address may be 8 bits long (@aa:8), 16 bits long (@aa:16), or 24 bits long (@aa:24). For an 8-bit absolute address, the upper 16 bits are all assumed to be 1 (H'FFFF). For a 16-bit absolute address the upper 8 bits are a sign extension. A 24-bit absolute address can access the entire address space. Table 2.12 indicates the accessible address ranges. Table 2.12 Absolute Address Access Ranges Absolute Address 1-Mbyte Modes 16-Mbyte Modes 8 bits (@aa:8) H'FFF00 to H'FFFFF (1048320 to 1048575) H'FFFF00 to H'FFFFFF (16776960 to 16777215) 16 bits (@aa:16) H'00000 to H'07FFF, H'F8000 to H'FFFFF (0 to 32767, 1015808 to 1048575) H'000000 to H'007FFF, H'FF8000 to H'FFFFFF (0 to 32767, 16744448 to 16777215) 24 bits (@aa:24) H'00000 to H'FFFFF (0 to 1048575) H'000000 to H'FFFFFF (0 to 16777215) 6 Immediate--#xx:8, #xx:16, or #xx:32: The instruction code contains 8-bit (#xx:8), 16-bit (#xx:16), or 32-bit (#xx:32) immediate data as an operand. The instruction codes of the ADDS, SUBS, INC, and DEC instructions contain immediate data implicitly. The instruction codes of some bit manipulation instructions contain 3-bit immediate data specifying a bit number. The TRAPA instruction code contains 2-bit immediate data specifying a vector address. 7 Program-Counter Relative--@(d:8, PC) or @(d:16, PC): This mode is used in the Bcc and BSR instructions. An 8-bit or 16-bit displacement contained in the instruction code is sign42 extended to 24 bits and added to the 24-bit PC contents to generate a 24-bit branch address. The PC value to which the displacement is added is the address of the first byte of the next instruction, so the possible branching range is -126 to +128 bytes (-63 to +64 words) or -32766 to +32768 bytes (-16383 to +16384 words) from the branch instruction. The resulting value should be an even number. 8 Memory Indirect--@@aa:8: This mode can be used by the JMP and JSR instructions. The instruction code contains an 8-bit absolute address specifying a memory operand. This memory operand contains a branch address. The memory operand is accessed by longword access. The first byte of the memory operand is ignored, generating a 24-bit branch address. See figure 2.10. The upper bits of the 8-bit absolute address are assumed to be 0 (H'0000), so the address range is 0 to 255 (H'000000 to H'0000FF). Note that the first part of this range is also the exception vector area. For further details see section 5, Interrupt Controller. Specified by @aa:8 Reserved Branch address Figure 2.10 Memory-Indirect Branch Address Specification When a word-size or longword-size memory operand is specified, or when a branch address is specified, if the specified memory address is odd, the least significant bit is regarded as 0. The accessed data or instruction code therefore begins at the preceding address. See section 2.5.2, Memory Data Formats. 2.7.2 Effective Address Calculation Table 2.13 explains how an effective address is calculated in each addressing mode. In the 1-Mbyte operating modes the upper 4 bits of the calculated address are ignored in order to generate a 20-bit effective address. 43 44 4 3 2 r r r op r Register indirect with pre-decrement @-ERn op Register indirect with post-increment @ERn+ Register indirect with post-increment or pre-decrement op Register indirect with displacement @(d:16, ERn)/@(d:24, ERn) op Register indirect (@ERn) rm rn Register direct (Rn) 1 op Addressing Mode and Instruction Format No. 31 31 1 for a byte operand, 2 for a word operand, 4 for a longword operand 1, 2, or 4 General register contents 1, 2, or 4 General register contents disp General register contents General register contents Sign extension 31 31 Effective Address Calculation 0 0 0 0 23 23 23 23 Operand is general register contents Effective Address 0 0 0 0 Table 2.13 Effective Address Calculation 45 7 6 5 No. abs abs abs IMM op disp Program-counter relative @(d:8, PC) or @(d:16, PC) op Immediate #xx:8, #xx:16, or #xx:32 op @aa:24 op @aa:16 op Absolute address @aa:8 Addressing Mode and Instruction Format disp PC contents Sign extension 23 Effective Address Calculation 0 16 15 H'FFFF 8 7 23 Operand is immediate data 23 Sign extension 23 23 Effective Address 0 0 0 0 46 Memory indirect @@aa:8 8 abs Legend: r, rm, rn: op: disp: IMM: abs: abs Register field Operation field Displacement Immediate data Absolute address op Advanced mode op Normal mode Addressing Mode and Instruction Format No. 31 8 7 abs 0 H'0000 8 7 abs 0 0 15 0 Memory contents H'0000 Memory contents 23 23 Effective Address Calculation 23 23 16 15 H'00 Effective Address 0 0 2.8 Processing States 2.8.1 Overview The H8/300H CPU has five processing states: the program execution state, exception-handling state, power-down state, reset state, and bus-released state. The power-down state includes sleep mode, software standby mode, and hardware standby mode. Figure 2.11 classifies the processing states. Figure 2.13 indicates the state transitions. Processing states Program execution state The CPU executes program instructions in sequence Exception-handling state A transient state in which the CPU executes a hardware sequence (saving PC and CCR, fetching a vector, etc.) in response to a reset, interrupt, or other exception Bus-released state The external bus has been released in response to a bus request signal from a bus master other than the CPU Reset state The CPU and all on-chip supporting modules are initialized and halted Power-down state Sleep mode The CPU is halted to conserve power Software standby mode Hardware standby mode Figure 2.11 Processing States 2.8.2 Program Execution State In this state the CPU executes program instructions in normal sequence. 47 2.8.3 Exception-Handling State The exception-handling state is a transient state that occurs when the CPU alters the normal program flow due to a reset, interrupt, or trap instruction. The CPU fetches a starting address from the exception vector table and branches to that address. In interrupt and trap exception handling the CPU references the stack pointer (ER7) and saves the program counter and condition code register. Types of Exception Handling and Their Priority: Exception handling is performed for resets, interrupts, and trap instructions. Table 2.14 indicates the types of exception handling and their priority. Trap instruction exceptions are accepted at all times in the program execution state. Table 2.14 Exception Handling Types and Priority Priority Type of Exception Detection Timing Start of Exception Handling High Reset Synchronized with clock Exception handling starts immediately when RES changes from low to high Interrupt End of instruction execution or end of exception handling* When an interrupt is requested, exception handling starts at the end of the current instruction or current exception-handling sequence Trap instruction When TRAPA instruction Exception handling starts when a trap is executed (TRAPA) instruction is executed Low Note: * Interrupts are not detected at the end of the ANDC, ORC, XORC, and LDC instructions, or immediately after reset exception handling. Figure 2.12 classifies the exception sources. For further details about exception sources, vector numbers, and vector addresses, see section 4, Exception Handling, and section 5, Interrupt Controller. Reset External interrupts Exception sources Interrupt Internal interrupts (from on-chip supporting modules) Trap instruction Figure 2.12 Classification of Exception Sources 48 Bus request End of bus release Program execution state End of bus release Bus request Exception handling source Bus-released state End of exception handling Interrupt source Exception-handling state NMI, IRQ 0 , IRQ 1, or IRQ 2 interrupt SLEEP instruction with SSBY = 0 Sleep mode SLEEP instruction with SSBY = 1 Software standby mode RES = "High" Reset state *1 STBY="High", RES ="Low" Hardware standby mode *2 Power-down state Notes: *1 From any state except hardware standby mode, a transition to the reset state occurs whenever RES goes low. *2 From any state, a transition to hardware standby mode occurs when STBY goes low. Figure 2.13 State Transitions 2.8.4 Exception Handling Operation Reset Exception Handling: Reset exception handling has the highest priority. The reset state is entered when the RES signal goes low. Reset exception handling starts after that, when RES changes from low to high. When reset exception handling starts the CPU fetches a start address from the exception vector table and starts program execution from that address. All interrupts, including NMI, are disabled during the reset exception-handling sequence and immediately after it ends. Interrupt Exception Handling and Trap Instruction Exception Handling: When these exception-handling sequences begin, the CPU references the stack pointer (ER7) and pushes the program counter and condition code register on the stack. Next, if the UE bit in the system control register (SYSCR) is set to 1, the CPU sets the I bit in the condition code register to 1. If the UE bit is cleared to 0, the CPU sets both the I bit and the UI bit in the condition code register to 1. Then the CPU fetches a start address from the exception vector table and execution branches to that address. 49 Figure 2.14 shows the stack after the exception-handling sequence. SP-4 SP (ER7) SP-3 SP+1 SP-2 SP+2 SP-1 SP+3 Stack area SP (ER7) Before exception handling starts CCR PC SP+4 Pushed on stack Even address After exception handling ends Legend: CCR: Condition code register SP: Stack pointer Notes: 1. PC is the address of the first instruction executed after the return from the exception-handling routine. 2. Registers must be saved and restored by word access or longword access, starting at an even address. Figure 2.14 Stack Structure after Exception Handling 2.8.5 Bus-Released State In this state the bus is released to a bus master other than the CPU, in response to a bus request. The bus masters other than the CPU is an external bus master. While the bus is released, the CPU halts except for internal operations. Interrupt requests are not accepted. For details see section 6.6, Bus Arbiter. 2.8.6 Reset State When the RES input goes low all current processing stops and the CPU enters the reset state. The I bit in the condition code register is set to 1 by a reset. All interrupts are masked in the reset state. Reset exception handling starts when the RES signal changes from low to high. The reset state can also be entered by a watchdog timer overflow. For details see section 11, Watchdog Timer. 50 2.8.7 Power-Down State In the power-down state the CPU stops operating to conserve power. There are three modes: sleep mode, software standby mode, and hardware standby mode. Sleep Mode: A transition to sleep mode is made if the SLEEP instruction is executed while the SSBY bit is cleared to 0 in the system control register (SYSCR). CPU operations stop immediately after execution of the SLEEP instruction, but the contents of CPU registers are retained. Software Standby Mode: A transition to software standby mode is made if the SLEEP instruction is executed while the SSBY bit is set to 1 in SYSCR. The CPU and clock halt and all on-chip supporting modules stop operating. The on-chip supporting modules are reset, but as long as a specified voltage is supplied the contents of CPU registers and on-chip RAM are retained. The I/O ports also remain in their existing states. Hardware Standby Mode: A transition to hardware standby mode is made when the STBY input goes low. As in software standby mode, the CPU and all clocks halt and the on-chip supporting modules are reset, but as long as a specified voltage is supplied, on-chip RAM contents are retained. For further information see section 18, Power-Down State. 2.9 Basic Operational Timing 2.9.1 Overview The H8/300H CPU operates according to the system clock (o). The interval from one rise of the system clock to the next rise is referred to as a "state." A memory cycle or bus cycle consists of two or three states. The CPU uses different methods to access on-chip memory, the on-chip supporting modules, and the external address space. Access to the external address space can be controlled by the bus controller. 2.9.2 On-Chip Memory Access Timing On-chip memory is accessed in two states. The data bus is 16 bits wide, permitting both byte and word access. Figure 2.15 shows the on-chip memory access cycle. Figure 2.16 indicates the pin states. The H8/3008 has a function for changing the method of outputting addresses from the address pins. For details see section 6.3.5, Address Output Method. 51 Bus cycle T1 state T2 state Internal address bus Address Internal read signal Internal data bus (read access) Read data Internal write signal Internal data bus (write access) Write data Figure 2.15 On-Chip Memory Access Cycle T1 T2 Address bus AS , RD, HWR , LWR Address High High impedance D15 to D0 Figure 2.16 Pin States during On-Chip Memory Access (Address Update Mode 1) 2.9.3 On-Chip Supporting Module Access Timing The on-chip supporting modules are accessed in three states. The data bus is 8 or 16 bits wide, depending on the internal I/O register being accessed. Figure 2.17 shows the on-chip supporting module access timing. Figure 2.18 indicates the pin states. 52 Bus cycle T1 state T2 state T3 state Address Address bus Read access Internal read signal Internal data bus Read data Internal write signal Write access Internal data bus Write data Figure 2.17 Access Cycle for On-Chip Supporting Modules T1 T2 T3 Address bus AS , RD, HWR , LWR Address High High impedance D15 to D0 Figure 2.18 Pin States during Access to On-Chip Supporting Modules 2.9.4 Access to External Address Space The external address space is divided into eight areas (areas 0 to 7). Bus-controller settings determine whether each area is accessed via an 8-bit or 16-bit data bus, and whether it is accessed in two or three states. For details see section 6, Bus Controller. 53 54 Section 3 MCU Operating Modes 3.1 Overview 3.1.1 Operating Mode Selection The H8/3008 has four operating modes (modes 1 to 4) that are selected by the mode pins (MD2 to MD0) as indicated in table 3.1. The input at these pins determines the size of the address space and the initial bus mode. Table 3.1 Operating Mode Selection Description Mode Pins Operating Mode MD2 MD1 MD0 Address Space Initial Bus Mode*1 On-Chip ROM On-Chip RAM -- 0 0 0 Setting prohibited Setting prohibited Setting prohibited Setting prohibited Mode 1 0 0 1 Expanded mode 8 bits Disabled Enabled* 2 Mode 2 0 1 0 Expanded mode 16 bits Disabled Enabled* 2 Mode 3 0 1 1 Expanded mode 8 bits Disabled Enabled* 2 Mode 4 1 0 0 Expanded mode 16 bits Disabled Enabled* 2 -- 1 0 1 Setting prohibited Setting prohibited Setting prohibited Setting prohibited -- 1 1 0 Setting prohibited Setting prohibited Setting prohibited Setting prohibited -- 1 1 1 Setting prohibited Setting prohibited Setting prohibited Setting prohibited Notes: *1 In modes 1 to 4, an 8-bit or 16-bit data bus can be selected on a per-area basis by settings made in the area bus width control register (ABWCR). For details see section 6, Bus Controller. *2 If the RAME bit in SYSCR is cleared to 0, these addresses become external addresses. For the address space size there are three choices: 1 Mbyte or 16 Mbyte. The external data bus is either 8 or 16 bits wide depending on ABWCR settings. 8-bit bus mode is used only if 8-bit access is selected for all areas. For details see section 6, Bus Controller. 55 Modes 1 to 4 are externally expanded modes that enable access to external memory and peripheral devices and disable access to the on-chip ROM. Modes 1 and 2 support a maximum address space of 1 Mbyte. Modes 3 and 4 support a maximum address space of 16 Mbytes. The H8/3008 can be used only in modes 1 to 4. The inputs at the mode pins must select one of these four modes. The inputs at the mode pins must not be changed during operation. Set the reset state before changing the inputs at these pins. 3.1.2 Register Configuration The H8/3008 has a mode control register (MDCR) that indicates the inputs at the mode pins (MD2 to MD0), and a system control register (SYSCR). Table 3.2 summarizes these registers. Table 3.2 Registers Address* Name Abbreviation R/W Initial Value H'EE011 Mode control register MDCR R Undetermined H'EE012 System control register SYSCR R/W H'09 Note: * Lower 20 bits of the address in advanced mode. 3.2 Mode Control Register (MDCR) MDCR is an 8-bit read-only register that indicates the current operating mode of the H8/3008. Bit 7 6 5 4 3 2 1 0 -- -- -- -- -- MDS2 MDS1 MDS0 Initial value 1 1 0 0 0 --* --* --* Read/Write -- -- -- -- -- R R R Reserved bits Mode select 2 to 0 Bits indicating the current operating mode Note: * Determined by pins MD 2 to MD 0 . Bits 7 and 6--Reserved: These bits can not be modified and are always read as 1. Bits 5 to 3--Reserved: These bits can not be modified and are always read as 0. Bits 2 to 0--Mode Select 2 to 0 (MDS2 to MDS0): These bits indicate the logic levels at pins MD2 to MD0 (the current operating mode). MDS2 to MDS0 correspond to MD2 to MD0. MDS2 to 56 MDS0 are read-only bits. The mode pin (MD 2 to MD0) levels are latched into these bits when MDCR is read. 3.3 System Control Register (SYSCR) SYSCR is an 8-bit register that controls the operation of the H8/3008. Bit 7 6 5 4 3 2 1 0 SSBY STS2 STS1 STS0 UE NMIEG SSOE RAME Initial value 0 0 0 0 1 0 0 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W RAM enable Enables or disables on-chip RAM Software standby output port enable Selects the output state of the address bus and bus control signals in software standby mode NMI edge select Selects the valid edge of the NMI input User bit enable Selects whether to use the UI bit in CCR as a user bit or an interrupt mask bit Standby timer select 2 to 0 These bits select the waiting time at recovery from software standby mode Software standby Enables transition to software standby mode Bit 7--Software Standby (SSBY): Enables transition to software standby mode. (For further information about software standby mode see section 18, Power-Down State.) When software standby mode is exited by an external interrupt, and a transition is made to normal operation, this bit remains set to 1. To clear this bit, write 0. Bit 7 SSBY Description 0 SLEEP instruction causes transition to sleep mode 1 SLEEP instruction causes transition to software standby mode (Initial value) 57 Bits 6 to 4--Standby Timer Select 2 to 0 (STS2 to STS0): These bits select the length of time the CPU and on-chip supporting modules wait for the internal clock oscillator to settle when software standby mode is exited by an external interrupt. When using a crystal oscillator, set these bits so that the waiting time will be at least 7 ms at the system clock rate. For further information about waiting time selection, see section 18.4.3, Selection of Waiting Time for Exit from Software Standby Mode. Bit 6 STS2 Bit 5 STS1 Bit 4 STS0 Description 0 0 0 Waiting time = 8,192 states 0 0 1 Waiting time = 16,384 states 0 1 0 Waiting time = 32,768 states 0 1 1 Waiting time = 65,536 states 1 0 0 Waiting time = 131,072 states 1 0 1 Waiting time = 262,144 states 1 1 0 Waiting time = 1,024 states 1 1 1 Illegal setting (Initial value) Bit 3--User Bit Enable (UE): Selects whether to use the UI bit in the condition code register as a user bit or an interrupt mask bit. Bit 3 UE Description 0 UI bit in CCR is used as an interrupt mask bit 1 UI bit in CCR is used as a user bit (Initial value) Bit 2--NMI Edge Select (NMIEG): Selects the valid edge of the NMI input. Bit 2 NMIEG Description 0 An interrupt is requested at the falling edge of NMI 1 An interrupt is requested at the rising edge of NMI 58 (Initial value) Bit 1--Software Standby Output Port Enable (SSOE): Specifies whether the address bus and bus control signals (CS0 to CS7, AS, RD, HWR, LWR) are kept as outputs or fixed high, or placed in the high-impedance state in software standby mode. Bit 1 SSOE Description 0 In software standby mode, the address bus and bus control signals are all highimpedance (Initial value) 1 In software standby mode, the address bus retains its output state and bus control signals are fixed high Bit 0--RAM Enable (RAME): Enables or disables the on-chip RAM. The RAME bit is initialized by the rising edge of the RES signal. It is not initialized in software standby mode. Bit 0 RAME Description 0 On-chip RAM is disabled 1 On-chip RAM is enabled 3.4 Operating Mode Descriptions 3.4.1 Mode 1 (Initial value) Ports 1, 2, and 5 function as address pins A19 to A0, permitting access to a maximum 1-Mbyte address space. The initial bus mode after a reset is 8 bits, with 8-bit access to all areas. If at least one area is designated for 16-bit access in ABWCR, the bus mode switches to 16 bits. 3.4.2 Mode 2 Ports 1, 2, and 5 function as address pins A19 to A0, permitting access to a maximum 1-Mbyte address space. The initial bus mode after a reset is 16 bits, with 16-bit access to all areas. If all areas are designated for 8-bit access in ABWCR, the bus mode switches to 8 bits. 3.4.3 Mode 3 Ports 1, 2, and 5 and part of port A function as address pins A23 to A0, permitting access to a maximum 16-Mbyte address space. The initial bus mode after a reset is 8 bits, with 8-bit access to all areas. If at least one area is designated for 16-bit access in ABWCR, the bus mode switches to 16 bits. A23 to A21 are valid when 0 is written in bits 7 to 5 of the bus release control register (BRCR). (In this mode A20 is always used for address output.) 59 3.4.4 Mode 4 Ports 1, 2, and 5 and part of port A function as address pins A23 to A0, permitting access to a maximum 16-Mbyte address space. The initial bus mode after a reset is 16 bits, with 16-bit access to all areas. If all areas are designated for 8-bit access in ABWCR, the bus mode switches to 8 bits. A23 to A21 are valid when 0 is written in bits 7 to 5 of BRCR. (In this mode A20 is always used for address output.) 3.4.5 Modes 5 to 7 These modes cannot be used in the H8/3008. Pin settings must not be made for these modes. 3.5 Pin Functions in Each Operating Mode The pin functions of ports 1 to 5 and port A vary depending on the operating mode. Table 3.3 indicates their functions in each operating mode. Table 3.3 Pin Functions in Each Mode Port Mode 1 Mode 2 Mode 3 Mode 4 Port 1 A7 to A0 A7 to A0 A7 to A0 A7 to A0 Port 2 A15 to A8 A15 to A8 A15 to A8 A15 to A8 Port 3 D15 to D8 D15 to D8 1 D15 to D8 1 D15 to D8 1 Port 4 P47 to P40* D7 to D0* P47 to P40* D7 to D0*1 Port 5 A19 to A16 A19 to A16 A19 to A16 A19 to A16 Port A PA 7 to PA4 PA 7 to PA4 PA 6 to PA4, A20 *2 PA 6 to PA4, A20 *2 Notes: *1 Initial state. The bus mode can be switched by settings in ABWCR. These pins function as P47 to P4 0 in 8-bit bus mode, and as D 7 to D0 in 16-bit bus mode. *2 Initial state. A20 is always an address output pin. PA6 to PA 4 are switched over to A 23 to A21 output by writing 0 in bits 7 to 5 of BRCR. 60 3.6 Memory Map in Each Operating Mode Figures 3.1 and 3.2 show memory maps of the H8/3008. In the expanded modes, the address space is divided into eight areas. The initial bus mode differs between modes 1 and 2, and also between modes 3 and 4. The address locations of the on-chip RAM and on-chip registers differ between the 1-Mbyte modes (modes 1 and 2) and the 16-Mbyte modes (modes 3 and 4). The address range specifiable by the CPU in the 8- and 16-bit absolute addressing modes (@aa:8 and @aa:16) also differs. 3.6.1 Reserved Areas The H8/3008 memory map includes reserved areas to which access (reading or writing) is prohibited. Normal operation cannot be guaranteed if the following reserved areas are accessed. Reserved Area in Internal I/O Register Space: The H8/3008 internal I/O register space includes a reserved area to which access is prohibited. For details see Appendix B, Internal I/O Registers. 61 H'1FFFF H'20000 H'3FFFF H'40000 H'5FFFF H'60000 External H'7FFFF address space H'80000 H'9FFFF H'A0000 H'BFFFF H'C0000 H'DFFFF H'E0000 H'EE0FF H'F8000 H'FEF1F H'FEF20 H'FFF1F H'FFF20 H'FFFE9 H'FFFEA H'FFFFF H'1FFFFF H'200000 Area 1 Area 1 Area 2 H'3FFFFF H'400000 Area 3 Area 2 Area 4 H'5FFFFF H'600000 Area 5 Area 6 Internal I/O registers (2) External address space External Area 3 address space H'7FFFFF H'800000 Area 7 Area 4 H'9FFFFF H'A00000 External address space On-chip RAM* 16-bit absolute addresses Area 0 Area 0 Internal I/O registers (1) H'FFF00 H'0000FF H'007FFF Area 5 16-bit absolute addresses H'EE000 Vector area H'BFFFFF H'C00000 Area 6 H'DFFFFF H'E00000 H'FEE000 Area 7 Internal I/O registers (1) H'FEE0FF H'FF8000 External address space On-chip RAM* H'FFFF00 H'FFFF1F H'FFFF20 H'FFFFE9 H'FFFFEA Internal I/O registers (2) External address space H'FFFFFF 8-bit absolute addresses H'FFEF1F H'FFEF20 16-bit absolute addresses H'07FFF H'000000 Memory-indirect branch addresses H'000FF Modes 3 and 4 (16-Mbyte expanded modes with on-chip ROM disabled) 16-bit absolute addresses Vector area 8-bit absolute addresses H'00000 Memory-indirect branch addresses Modes 1 and 2 (1-Mbyte expanded modes with on-chip ROM disabled) Note: * External addresses can be accessed by disabling on-chip RAM. Figure 3.1 Memory Map of H8/3008 in Each Operating Mode 62 Section 4 Exception Handling 4.1 Overview 4.1.1 Exception Handling Types and Priority As table 4.1 indicates, exception handling may be caused by a reset, interrupt, or trap instruction. Exception handling is prioritized as shown in table 4.1. If two or more exceptions occur simultaneously, they are accepted and processed in priority order. Trap instruction exceptions are accepted at all times in the program execution state. Table 4.1 Exception Types and Priority Priority Exception Type Start of Exception Handling High Reset Starts immediately after a low-to-high transition at the RES pin Interrupt Interrupt requests are handled when execution of the current instruction or handling of the current exception is completed Low 4.1.2 Trap instruction (TRAPA) Started by execution of a trap instruction (TRAPA) Exception Handling Operation Exceptions originate from various sources. Trap instructions and interrupts are handled as follows. 1. The program counter (PC) and condition code register (CCR) are pushed onto the stack. 2. The CCR interrupt mask bit is set to 1. 3. A vector address corresponding to the exception source is generated, and program execution starts from that address. Note: For a reset exception, steps 2 and 3 above are carried out. 63 4.1.3 Exception Vector Table The exception sources are classified as shown in figure 4.1. Different vectors are assigned to different exception sources. Table 4.2 lists the exception sources and their vector addresses. * Reset External interrupts: NMI, IRQ 0 to IRQ5 Exception sources * Interrupts * Trap instruction Internal interrupts: 27 interrupts from on-chip supporting modules Figure 4.1 Exception Sources 64 Table 4.2 Exception Vector Table Vector Address*1 Exception Source Vector Number Advanced Mode Normal Mode Reset 0 H'0000 to H'0003 H'0000 to H'0001 Reserved for system use 1 H'0004 to H'0007 H'0002 to H'0003 2 H'0008 to H'000B H'0004 to H'0005 3 H'000C to H'000F H'0006 to H'0007 4 H'0010 to H'0013 H'0008 to H'0009 5 H'0014 to H'0017 H'000A to H'000B 6 H'0018 to H'001B H'000C to H'000D External interrupt (NMI) 7 H'001C to H'001F H'000E to H'000F Trap instruction (4 sources) 8 H'0020 to H'0023 H'0010 to H'0011 9 H'0024 to H'0027 H'0012 to H'0013 10 H'0028 to H'002B H'0014 to H'0015 11 H'002C to H'002F H'0016 to H'0017 External interrupt IRQ0 12 H'0030 to H'0033 H'0018 to H'0019 External interrupt IRQ1 13 H'0034 to H'0037 H'001A to H'001B External interrupt IRQ2 14 H'0038 to H'003B H'001C to H'001D External interrupt IRQ3 15 H'003C to H'003F H'001E to H'001F External interrupt IRQ4 16 H'0040 to H'0043 H'0020 to H'0021 External interrupt IRQ5 17 H'0044 to H'0047 H'0022 to H'0023 Reserved for system use 18 H'0048 to H'004B H'0024 to H'0025 19 H'004C to H'004F H'0026 to H'0027 20 to 63 H'0050 to H'0053 to H'00FC to H'00FF H'0028 to H'0029 to H'007E to H'007F 2 Internal interrupts* Notes: *1 Lower 16 bits of the address. *2 For the internal interrupt vectors, see section 5.3.3, Interrupt Vector Table. 65 4.2 Reset 4.2.1 Overview A reset is the highest-priority exception. When the RES pin goes low, all processing halts and the chip enters the reset state. A reset initializes the internal state of the CPU and the registers of the on-chip supporting modules. Reset exception handling begins when the RES pin changes from low to high. The chip can also be reset by overflow of the watchdog timer. For details see section 11, Watchdog Timer. 4.2.2 Reset Sequence The chip enters the reset state when the RES pin goes low. To ensure that the chip is reset, hold the RES pin low for at least 20 ms at power-up. To reset the chip during operation, hold the RES pin low for at least 10 system clock (o) cycles. In the versions with on-chip flash memory, the RES pin must be held low for at least 20 system clock cycles. See appendix D.2, Pin States at Reset, for the states of the pins in the reset state. When the RES pin goes high after being held low for the necessary time, the chip starts reset exception handling as follows. * The internal state of the CPU and the registers of the on-chip supporting modules are initialized, and the I bit is set to 1 in CCR. * The contents of the reset vector address (H'0000 to H'0003 in advanced mode, H'0000 to H'0001 in normal mode) are read, and program execution starts from the address indicated in the vector address. Figure 4.2 shows the reset sequence in modes 1 and 3. Figure 4.3 shows the reset sequence in modes 2 and 4. 66 Figure 4.2 Reset Sequence (Modes 1 and 3) 67 (2) (4) (3) (6) (5) (8) (7) Internal processing (10) (9) Prefetch of first program instruction Address of reset exception handling vector: (1) = H'000000, (3) = H'000001, (5) = H'000002, (7) = H'000003 Start address (contents of reset exception handling vector address) Start address First instruction of program High (1) Note: After a reset, the wait-state controller inserts three wait states in every bus cycle. (1), (3), (5), (7) (2), (4), (6), (8) (9) (10) D15 to D8 HWR , LWR RD Address bus RES Vector fetch Internal processing Vector fetch Prefetch of first program instruction RES Address bus (1) (3) (5) RD HWR , LWR High (2) D15 to D0 (1), (3) (2), (4) (5) (6) (4) (6) Address of reset exception handling vector: (1) = H'000000, (3) = H'000002 Start address (contents of reset exception handling vector address) Start address First instruction of program Note: After a reset, the wait-state controller inserts three wait states in every bus cycle. Figure 4.3 Reset Sequence (Modes 2 and 4) 4.2.3 Interrupts after Reset If an interrupt is accepted after a reset but before the stack pointer (SP) is initialized, PC and CCR will not be saved correctly, leading to a program crash. To prevent this, all interrupt requests, including NMI, are disabled immediately after a reset exception handling. The first instruction of the program is always executed immediately after the reset state ends. This instruction should initialize the stack pointer (example: MOV.L #xx:32, SP). 68 4.3 Interrupts Interrupt exception handling can be requested by seven external sources (NMI, IRQ0 to IRQ5), and 27 internal sources in the on-chip supporting modules. Figure 4.4 classifies the interrupt sources and indicates the number of interrupts of each type. The on-chip supporting modules that can request interrupts are the watchdog timer (WDT), 16-bit timer, 8-bit timer, serial communication interface (SCI), and A/D converter. Each interrupt source has a separate vector address. NMI is the highest-priority interrupt and is always accepted. Interrupts are controlled by the interrupt controller. The interrupt controller can assign interrupts other than NMI to two priority levels, and arbitrate between simultaneous interrupts. Interrupt priorities are assigned in interrupt priority registers A and B (IPRA and IPRB) in the interrupt controller. For details on interrupts see section 5, Interrupt Controller. External interrupts NMI (1) IRQ 0 to IRQ 5 (6) Internal interrupts WDT* (1) 16-bit timer (9) 8-bit timer (8) SCI (8) A/D converter (1) Interrupts Notes: Numbers in parentheses are the number of interrupt sources. * When the watchdog timer is used as an interval timer, it generates an interrupt request at every counter overflow. Figure 4.4 Interrupt Sources and Number of Interrupts 4.4 Trap Instruction Trap instruction exception handling starts when a TRAPA instruction is executed. If the UE bit is set to 1 in the system control register (SYSCR), the exception handling sequence sets the I bit to 1 in CCR. If the UE bit is 0, the I and UI bits are both set to 1 in CCR. The TRAPA instruction fetches a start address from a vector table entry corresponding to a vector number from 0 to 3, which is specified in the instruction code. 69 4.5 Stack Status after Exception Handling Figure 4.5 shows the stack after completion of trap instruction exception handling and interrupt exception handling. SP-4 SP-3 SP-2 SP-1 SP (ER7) SP (ER7) SP+1 SP+2 SP+3 SP+4 Stack area Before exception handling CCR CCR * PC H PC L Even address After exception handling Pushed on stack a. Normal mode SP-4 SP-3 SP-2 SP-1 SP (ER7) SP (ER7) SP+1 SP+2 SP+3 SP+4 Stack area Before exception handling CCR PC E PC H PC L Even address After exception handling Pushed on stack b. Advanced mode Legend PCE: Bits 23 to 16 of program counter (PC) PCH: Bits 15 to 8 of program counter (PC) PCL: Bits 7 to 0 of program counter (PC) CCR: Condition code register SP: Stack pointer Notes: * Ignored at return. 1. PC indicates the address of the first instruction that will be executed after return. 2. Registers must be saved in word or longword size at even addresses. Figure 4.5 Stack after Completion of Exception Handling 70 4.6 Notes on Stack Usage When accessing word data or longword data, the H8/3008 regards the lowest address bit as 0. The stack should always be accessed by word access or longword access, and the value of the stack pointer (SP:ER7) should always be kept even. Use the following instructions to save registers: PUSH.W Rn PUSH.L ERn (or MOV.W Rn, @-SP) (or MOV.L ERn, @-SP) Use the following instructions to restore registers: POP.W Rn POP.L ERn (or MOV.W @SP+, Rn) (or MOV.L @SP+, ERn) Setting SP to an odd value may lead to a malfunction. Figure 4.6 shows an example of what happens when the SP value is odd. 71 CCR SP R1L SP H'FFFEFA H'FFFEFB PC PC H'FFFEFC H'FFFEFD H'FFFEFE H'FFFEFF SP TRAPA instruction executed SP set to H'FFFEFF MOV. B R1L, @-ER7 Data saved above SP CCR contents lost Legend CCR: Condition code register PC: Program counter R1L: General register R1L SP: Stack pointer Note: The diagram illustrates modes 3 and 4. Figure 4.6 Operation when SP Value is Odd 72 Section 5 Interrupt Controller 5.1 Overview 5.1.1 Features The interrupt controller has the following features: * Interrupt priority registers (IPRs) for setting interrupt priorities Interrupts other than NMI can be assigned to two priority levels on a module-by-module basis in interrupt priority registers A and B (IPRA and IPRB). * Three-level enabling/disabling by the I and UI bits in the CPU's condition code register (CCR) and the UE bit in the system control register (SYSCR) * Seven external interrupt pins NMI has the highest priority and is always accepted; either the rising or falling edge can be selected. For each of IRQ5 to IRQ0, sensing of the falling edge or level sensing can be selected independently. 73 5.1.2 Block Diagram Figure 5.1 shows a block diagram of the interrupt controller. CPU ISCR IER IPRA, IPRB NMI input IRQ input section ISR IRQ input OVF TME . . . . . . . TEI TEIE Priority decision logic Interrupt request Vector number . . . I UI Interrupt controller UE Legend: ISCR: IER: ISR: IPRA: IPRB: SYSCR: SYSCR IRQ sense control register IRQ enable register IRQ status register Interrupt priority register A Interrupt priority register B System control register Figure 5.1 Interrupt Controller Block Diagram 74 CCR 5.1.3 Pin Configuration Table 5.1 lists the interrupt pins. Table 5.1 Interrupt Pins Name Abbreviation I/O Nonmaskable interrupt NMI Input Nonmaskable interrupt, rising edge or falling edge selectable External interrupt request 5 to 0 IRQ5 to IRQ0 Input Maskable interrupts, falling edge or level sensing selectable 5.1.4 Function Register Configuration Table 5.2 lists the registers of the interrupt controller. Table 5.2 Interrupt Controller Registers Address* 1 Name Abbreviation R/W Initial Value H'EE012 System control register SYSCR R/W H'09 H'EE014 IRQ sense control register ISCR R/W H'00 H'EE015 IRQ enable register IER R/W H'00 2 H'EE016 IRQ status register ISR R/(W)* H'00 H'EE018 Interrupt priority register A IPRA R/W H'00 H'EE019 Interrupt priority register B IPRB R/W H'00 Notes: *1 Lower 20 bits of the address in advanced mode. *2 Only 0 can be written, to clear flags. 5.2 Register Descriptions 5.2.1 System Control Register (SYSCR) SYSCR is an 8-bit readable/writable register that controls software standby mode, selects the action of the UI bit in CCR, selects the NMI edge, and enables or disables the on-chip RAM. Only bits 3 and 2 are described here. For the other bits, see section 3.3, System Control Register (SYSCR). 75 SYSCR is initialized to H'09 by a reset and in hardware standby mode. It is not initialized in software standby mode. Bit 7 6 5 4 3 2 1 0 SSBY STS2 STS1 STS0 UE NMIEG SSOE RAME Initial value 0 0 0 0 1 0 0 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W RAM enable Software standby output port enable NMI edge select Selects the NMI input edge Standby timer select 2 to 0 Software standby User bit enable Selects whether to use the UI bit in CCR as a user bit or interrupt mask bit Bit 3--User Bit Enable (UE): Selects whether to use the UI bit in CCR as a user bit or an interrupt mask bit. Bit 3 UE Description 0 UI bit in CCR is used as interrupt mask bit 1 UI bit in CCR is used as user bit (Initial value) Bit 2--NMI Edge Select (NMIEG): Selects the NMI input edge. Bit 2 NMIEG Description 0 Interrupt is requested at falling edge of NMI input 1 Interrupt is requested at rising edge of NMI input 5.2.2 Interrupt Priority Registers A and B (IPRA, IPRB) IPRA and IPRB are 8-bit readable/writable registers that control interrupt priority. 76 (Initial value) Interrupt Priority Register A (IPRA): IPRA is an 8-bit readable/writable register in which interrupt priority levels can be set. Bit 7 6 5 4 3 2 1 0 IPRA7 IPRA6 IPRA5 IPRA4 IPRA3 IPRA2 IPRA1 IPRA0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Priority level A0 Selects the priority level of 16-bit timer channel 2 interrupt requests Priority level A1 Selects the priority level of 16-bit timer channel 1 interrupt requests Priority level A2 Selects the priority level of 16-bit timer channel 0 interrupt requests Priority level A3 Selects the priority level of WDT, and A/D converter interrupt requests Priority level A4 Selects the priority level of IRQ4 and IRQ 5 interrupt requests Priority level A5 Selects the priority level of IRQ 2 and IRQ 3 interrupt requests Priority level A6 Selects the priority level of IRQ1 interrupt requests Priority level A7 Selects the priority level of IRQ 0 interrupt requests IPRA is initialized to H'00 by a reset and in hardware standby mode. 77 Bit 7--Priority Level A7 (IPRA7): Selects the priority level of IRQ 0 interrupt requests. Bit 7 IPRA7 Description 0 IRQ0 interrupt requests have priority level 0 (low priority) 1 IRQ0 interrupt requests have priority level 1 (high priority) (Initial value) Bit 6--Priority Level A6 (IPRA6): Selects the priority level of IRQ 1 interrupt requests. Bit 6 IPRA6 Description 0 IRQ1 interrupt requests have priority level 0 (low priority) 1 IRQ1 interrupt requests have priority level 1 (high priority) (Initial value) Bit 5--Priority Level A5 (IPRA5): Selects the priority level of IRQ 2 and IRQ 3 interrupt requests. Bit 5 IPRA5 Description 0 IRQ2 and IRQ3 interrupt requests have priority level 0 (low priority) 1 IRQ2 and IRQ3 interrupt requests have priority level 1 (high priority) (Initial value) Bit 4--Priority Level A4 (IPRA4): Selects the priority level of IRQ 4 and IRQ 5 interrupt requests. Bit 4 IPRA4 Description 0 IRQ4 and IRQ5 interrupt requests have priority level 0 (low priority) 1 IRQ4 and IRQ5 interrupt requests have priority level 1 (high priority) (Initial value) Bit 3--Priority Level A3 (IPRA3): Selects the priority level of WDT, and A/D converter interrupt requests. Bit 3 IPRA3 Description 0 WDT, and A/D converter interrupt requests have priority level 0 (low priority) (Initial value) 1 WDT, and A/D converter interrupt requests have priority level 1 (high priority) 78 Bit 2--Priority Level A2 (IPRA2): Selects the priority level of 16-bit timer channel 0 interrupt requests. Bit 2 IPRA2 Description 0 16-bit timer channel 0 interrupt requests have priority level 0 (low priority) (Initial value) 1 16-bit timer channel 0 interrupt requests have priority level 1 (high priority) Bit 1--Priority Level A1 (IPRA1): Selects the priority level of 16-bit timer channel 1 interrupt requests. Bit 1 IPRA1 Description 0 16-bit timer channel 1 interrupt requests have priority level 0 (low priority) (Initial value) 1 16-bit timer channel 1 interrupt requests have priority level 1 (high priority) Bit 0--Priority Level A0 (IPRA0): Selects the priority level of 16-bit timer channel 2 interrupt requests. Bit 0 IPRA0 Description 0 16-bit timer channel 2 interrupt requests have priority level 0 (low priority) (Initial value) 1 16-bit timer channel 2 interrupt requests have priority level 1 (high priority) 79 Interrupt Priority Register B (IPRB): IPRB is an 8-bit readable/writable register in which interrupt priority levels can be set. Bit 7 6 5 4 3 2 1 0 IPRB7 IPRB6 -- -- IPRB3 IPRB2 -- -- Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reserved bit Priority level B2 Selects the priority level of SCI channel 1 interrupt requests Priority level B3 Selects the priority level of SCI channel 0 interrupt requests Reserved bits Priority level B6 Selects the priority level of 8-bit timer channel 2, 3 interrupt requests Priority level B7 Selects the priority level of 8-bit timer channel 0, 1 interrupt requests IPRB is initialized to H'00 by a reset and in hardware standby mode. Bit 7--Priority Level B7 (IPRB7): Selects the priority level of 8-bit timer channel 0, 1 interrupt requests. Bit 7 IPRB7 Description 0 8-bit timer channel 0 and 1 interrupt requests have priority level 0 (low priority) (Initial value) 1 8-bit timer channel 0 and 1 interrupt requests have priority level 1 (high priority) 80 Bit 6--Priority Level B6 (IPRB6): Selects the priority level of 8-bit timer channel 2, 3 interrupt requests. Bit 6 IPRB6 Description 0 8-bit timer channel 2 and 3 interrupt requests have priority level 0 (low priority) (Initial value) 1 8-bit timer channel 2 and 3 interrupt requests have priority level 1 (high priority) Bits 5 and 4--Reserved: These bits can be written and read, but they do not affect interrupt priority. Bit 3--Priority Level B3 (IPRB3): Selects the priority level of SCI channel 0 interrupt requests. Bit 3 IPRB3 Description 0 SCI0 channel 0 interrupt requests have priority level 0 (low priority) 1 SCI0 channel 0 interrupt requests have priority level 1 (high priority) (Initial value) Bit 2--Priority Level B2 (IPRB2): Selects the priority level of SCI channel 1 interrupt requests. Bit 2 IPRB2 Description 0 SCI1 channel 1 interrupt requests have priority level 0 (low priority) 1 SCI1 channel 1 interrupt requests have priority level 1 (high priority) (Initial value) Bits 1 and 0--Reserved: These bits can be written and read, but they do not affect interrupt priority. 5.2.3 IRQ Status Register (ISR) ISR is an 8-bit readable/writable register that indicates the status of IRQ5 to IRQ0 interrupt requests. 81 Bit 7 6 5 4 3 2 1 0 -- -- IRQ5F IRQ4F IRQ3F IRQ2F IRQ1F IRQ0F Initial value 0 0 0 0 0 0 0 0 Read/Write -- -- R/(W)* R/(W)* R/(W)* R/(W)* R/(W)* R/(W)* Reserved bits IRQ 5 to IRQ0 flags These bits indicate IRQ 5 to IRQ 0 flag interrupt request status Note: * Only 0 can be written, to clear flags. ISR is initialized to H'00 by a reset and in hardware standby mode. Bits 7 and 6--Reserved: These bits can not be modified and are always read as 0. Bits 5 to 0--IRQ5 to IRQ0 Flags (IRQ5F to IRQ0F): These bits indicate the status of IRQ5 to IRQ0 interrupt requests. Bits 5 to 0 IRQ5F to IRQ0F Description 0 [Clearing conditions] (Initial value) 0 is written in IRQnF after reading the IRQnF flag when IRQnF = 1. IRQnSC = 0, IRQn input is high, and interrupt exception handling is carried out. IRQnSC = 1 and IRQn interrupt exception handling is carried out. 1 [Setting conditions] IRQnSC = 0 and IRQn input is low. IRQnSC = 1 and IRQn input changes from high to low. Note: n = 5 to 0 5.2.4 IRQ Enable Register (IER) IER is an 8-bit readable/writable register that enables or disables IRQ5 to IRQ0 interrupt requests. Bit 7 6 5 4 3 2 1 0 -- -- IRQ5E IRQ4E IRQ3E IRQ2E IRQ1E IRQ0E Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reserved bits IRQ 5 to IRQ0 enable These bits enable or disable IRQ 5 to IRQ 0 interrupts IER is initialized to H'00 by a reset and in hardware standby mode. 82 Bits 7 and 6--Reserved: These bits can be written and read, but they do not enable or disable interrupts. Bits 5 to 0--IRQ5 to IRQ0 Enable (IRQ5E to IRQ0E): These bits enable or disable IRQ5 to IRQ0 interrupts. Bits 5 to 0 IRQ5E to IRQ0E Description 0 IRQ5 to IRQ 0 interrupts are disabled 1 IRQ5 to IRQ 0 interrupts are enabled 5.2.5 (Initial value) IRQ Sense Control Register (ISCR) ISCR is an 8-bit readable/writable register that selects level sensing or falling-edge sensing of the inputs at pins IRQ5 to IRQ0. Bit 7 6 -- -- 5 4 3 2 1 0 IRQ5SC IRQ4SC IRQ3SC IRQ2SC IRQ1SC IRQ0SC Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Reserved bits IRQ 5 to IRQ0 sense control These bits select level sensing or falling-edge sensing for IRQ 5 to IRQ 0 interrupts ISCR is initialized to H'00 by a reset and in hardware standby mode. Bits 7 and 6--Reserved: These bits can be written and read, but they do not select level or falling-edge sensing. Bits 5 to 0--IRQ5 to IRQ0 Sense Control (IRQ5SC to IRQ0SC): These bits select whether interrupts IRQ5 to IRQ0 are requested by level sensing of pins IRQ5 to IRQ0, or by falling-edge sensing. Bits 5 to 0 IRQ5SC to IRQ0SC Description 0 Interrupts are requested when IRQ5 to IRQ0 inputs are low 1 Interrupts are requested by falling-edge input at IRQ5 to IRQ0 (Initial value) 83 5.3 Interrupt Sources The interrupt sources include external interrupts (NMI, IRQ5 to IRQ0) and 27 internal interrupts. 5.3.1 External Interrupts There are seven external interrupts: NMI, and IRQ5 to IRQ0. Of these, NMI, IRQ2, IRQ1, and IRQ0 can be used to exit software standby mode. NMI: NMI is the highest-priority interrupt and is always accepted, regardless of the states of the I and UI bits in CCR. The NMIEG bit in SYSCR selects whether an interrupt is requested by the rising or falling edge of the input at the NMI pin. NMI interrupt exception handling has vector number 7. IRQ5 to IRQ0 Interrupts: These interrupts are requested by input signals at pins IRQ5 to IRQ0. The IRQ5 to IRQ0 interrupts have the following features. * ISCR settings can select whether an interrupt is requested by the low level of the input at pins IRQ5 to IRQ0, or by the falling edge. * IER settings can enable or disable the IRQ5 to IRQ0 interrupts. Interrupt priority levels can be assigned by four bits in IPRA (IPRA7 to IPRA4). * The status of IRQ5 to IRQ0 interrupt requests is indicated in ISR. The ISR flags can be cleared to 0 by software. Figure 5.2 shows a block diagram of interrupts IRQ5 to IRQ0. IRQnSC IRQnE IRQnF Edge/level sense circuit IRQn input S Q R Clear signal Note: n = 5 to 0 Figure 5.2 Block Diagram of Interrupts IRQ5 to IRQ0 84 IRQn interrupt request Figure 5.3 shows the timing of the setting of the interrupt flags (IRQnF). IRQn input pin IRQnF Note: n = 5 to 0 Figure 5.3 Timing of Setting of IRQnF Interrupts IRQ 0 to IRQ5 have vector numbers 12 to 17. These interrupts are detected regardless of whether the corresponding pin is set for input or output. When using a pin for external interrupt input, clear its DDR bit to 0 and do not use the pin for chip select output, SCI input/output, or A/D external trigger input. 5.3.2 Internal Interrupts Twenty-Seven internal interrupts are requested from the on-chip supporting modules. * Each on-chip supporting module has status flags for indicating interrupt status, and enable bits for enabling or disabling interrupts. * Interrupt priority levels can be assigned in IPRA and IPRB. 5.3.3 Interrupt Exception Handling Vector Table Table 5.3 lists the interrupt exception handling sources, their vector addresses, and their default priority order. In the default priority order, smaller vector numbers have higher priority. The priority of interrupts other than NMI can be changed in IPRA and IPRB. The priority order after a reset is the default order shown in table 5.3. 85 Table 5.3 Interrupt Sources, Vector Addresses, and Priority Interrupt Source Origin NMI External pins Vector Address* Vector Number Advanced Mode Normal Mode 7 IPR H'001C to H'001F H'000E to H'000F -- 12 H'0030 to H'0033 H'0018 to H'0019 IRQ1 13 H'0034 to H0037 H'001A to H'001B IPRA6 IRQ2 IRQ3 14 15 H'0038 to H'003B H'001C to H'001D IPRA5 H'003C to H'003F H'001E to H'001F IRQ4 IRQ5 16 17 H'0040 to H'0043 H'0044 to H'0047 IRQ0 H'0020 to H'0021 H'0022 to H'0023 Reserved -- 18 19 H'0048 to H'004B H'0024 to H'0025 H'004C to H'004F H'0026 to H'0027 WOVI (interval timer) Watchdog timer 20 H'0050 to H'0053 Reserved -- 21 22 H'0054 to H'0057 H'002A to H'002B H'0058 to H'005B H'002C to H'002D ADI (A/D end) A/D 23 H'005C to H'005F H'002E to H'002F IMIA0 (compare match/ input capture A0) IMIB0 (compare match/ input capture B0) OVI0 (overflow 0) 16-bit timer 24 channel 0 H'0060 to H'0063 H'0030 to H'0031 25 H'0064 to H'0067 H'0032 to H'0033 26 H'0068 to H'006B H'0034 to H'0035 Reserved -- 27 H'006C to H'006F H'0036 to H'0037 IMIA1 (compare match/ inputcapture A1) IMIB1 (compare match/ input capture B1) OVI1 (overflow 1) 16-bit timer 28 channel 1 H'0070 to H'0073 H'0038 to H'0039 29 H'0074 to H'0077 H'003A to H'003B 30 H'0078 to H'007B H'003C to H'003D Reserved -- 31 H'007C to H'007F H'003E to H'003F 86 H'0028 to H'0029 Priority High IPRA7 IPRA4 IPRA3 IPRA2 IPRA1 Low Vector Address* Vector Number Advanced Mode Normal Mode Interrupt Source Origin IMIA2 (compare match/ input capture A2) IMIB2 (compare match/ input capture B2) OVI2 (overflow 2) 16-bit timer 32 channel 2 H'0080 to H'0083 H'0040 to H'0041 33 H'0084 to H'0087 H'0042 to H'0043 34 H'0088 to H'008B H'0044 to H'0045 Reserved -- 35 H'008C to H'008F H'0046 to H'0047 CMIA0 (compare match A0) CMIB0 (compare match B0) CMIA1/CMIB1 (compare match A1/B1) TOVI0/TOVI1 (overflow 0/1) 8-bit timer 36 channel 0/1 H'0090 to H'0093 H'0048 to H'0049 37 H'0094 to H'0097 H'004A to H'004B 38 H'0098 to H'009B H'004C to H'004D 39 H'009C to H'009F H'004E to H'004F CMIA2 (compare match A2) CMIB2 (compare match B2) CMIA3/CMIB3 (compare match A3/B3) TOVI2/TOVI3 (overflow 2/3) 8-bit timer 40 channel 2/3 H'00A0 to H'00A3 H'0050 to H'0051 41 H'00A4 to H'00A7 H'0052 to H'0053 42 H'00A8 to H'00AB H'0054 to H'0055 43 H'00AC to H'00AF H'0056 to H'0057 Reserved -- 44 45 46 47 48 49 50 51 H'00B0 to H'00B3 H'00B4 to H'00B7 H'00B8 to H'00BB H'00BC to H'00BF H'00C0 to H'00C3 H'00C4 to H'00C7 H'00C8 to H'00CB H'00CC to H'00CF IPR Priority IPRA0 High IPRB7 IPRB6 H'0058 to H'0059 -- H'005A to H'005B H'005C to H'005D H'005E to H'005F H'0060 to H'0061 H'0062 to H'0063 H'0064 to H'0065 H'0066 to H'0067 Low 87 Interrupt Source Origin ERI0 (receive error 0) RXI0 (receive data full 0) TXI0 (transmit data empty 0) TEI0 (transmit end 0) SCI channel 0 ERI1 (receive error 1) RXI1 (receive data full 1) TXI1 (transmit data empty 1) TEI1 (transmit end 1) SCI channel 1 Reserved -- Vector Address* Vector Number Advanced Mode Normal Mode 52 H'00D0 to H'00D3 H'0068 to H'0069 53 H'00D4 to H'00D7 H'006A to H'006B 54 H'00D8 to H'00DB H'006C to H'006D 55 H'00DC to H'00DF H'006E to H'006F 56 H'00E0 to H'00E3 H'0070 to H'0071 57 H'00E4 to H'00E7 H'0072 to H'0073 58 H'00E8 to H'00EB H'0074 to H'0075 59 H'00EC to H'00EF H'0076 to H'0077 60 H'00F0 to H'00F3 H'0078 to H'0079 61 H'00F4 to H'00F7 H'007A to H'007B 62 H'00F8 to H'00FB H'007C to H'007D 63 H'00FC to H'00FF H'007E to H'007F IPR Priority IPRB3 High IPRB2 -- Low Note: * Lower 16 bits of the address. 88 5.4 Interrupt Operation 5.4.1 Interrupt Handling Process The H8/3008 handles interrupts differently depending on the setting of the UE bit. When UE = 1, interrupts are controlled by the I bit. When UE = 0, interrupts are controlled by the I and UI bits. Table 5.4 indicates how interrupts are handled for all setting combinations of the UE, I, and UI bits. NMI interrupts are always accepted except in the reset and hardware standby states. IRQ interrupts and interrupts from the on-chip supporting modules have their own enable bits. Interrupt requests are ignored when the enable bits are cleared to 0. Table 5.4 UE, I, and UI Bit Settings and Interrupt Handling SYSCR CCR UE I UI Description 1 0 -- All interrupts are accepted. Interrupts with priority level 1 have higher priority. 1 -- No interrupts are accepted except NMI. 0 -- All interrupts are accepted. Interrupts with priority level 1 have higher priority. 1 0 NMI and interrupts with priority level 1 are accepted. 1 No interrupts are accepted except NMI. 0 UE = 1: Interrupts IRQ5 to IRQ0 and interrupts from the on-chip supporting modules can all be masked by the I bit in the CPU's CCR. Interrupts are masked when the I bit is set to 1, and unmasked when the I bit is cleared to 0. Interrupts with priority level 1 have higher priority. Figure 5.4 is a flowchart showing how interrupts are accepted when UE = 1. 89 Program execution state No Interrupt requested? Yes Yes NMI No No Pending Priority level 1? Yes IRQ 0 No Yes IRQ 1 IRQ 0 No Yes No IRQ 1 Yes No Yes TEI1 TEI1 Yes Yes No I=0 Yes Save PC and CCR I 1 Read vector address Branch to interrupt service routine Figure 5.4 Process Up to Interrupt Acceptance when UE = 1 90 * If an interrupt condition occurs and the corresponding interrupt enable bit is set to 1, an interrupt request is sent to the interrupt controller. * When the interrupt controller receives one or more interrupt requests, it selects the highestpriority request, following the IPR interrupt priority settings, and holds other requests pending. If two or more interrupts with the same IPR setting are requested simultaneously, the interrupt controller follows the priority order shown in table 5.3. * The interrupt controller checks the I bit. If the I bit is cleared to 0, the selected interrupt request is accepted. If the I bit is set to 1, only NMI is accepted; other interrupt requests are held pending. * When an interrupt request is accepted, interrupt exception handling starts after execution of the current instruction has been completed. * In interrupt exception handling, PC and CCR are saved to the stack area. The PC value that is saved indicates the address of the first instruction that will be executed after the return from the interrupt service routine. * Next the I bit is set to 1 in CCR, masking all interrupts except NMI. * The vector address of the accepted interrupt is generated, and the interrupt service routine starts executing from the address indicated by the contents of the vector address. UE = 0: The I and UI bits in the CPU's CCR and the IPR bits enable three-level masking of IRQ0 to IRQ5 interrupts and interrupts from the on-chip supporting modules. * Interrupt requests with priority level 0 are masked when the I bit is set to 1, and are unmasked when the I bit is cleared to 0. * Interrupt requests with priority level 1 are masked when the I and UI bits are both set to 1, and are unmasked when either the I bit or the UI bit is cleared to 0. For example, if the interrupt enable bits of all interrupt requests are set to 1, IPRA is set to H'20, and IPRB is set to H'00 (giving IRQ2 and IRQ 3 interrupt requests priority over other interrupts), interrupts are masked as follows: a. If I = 0, all interrupts are unmasked (priority order: NMI > IRQ2 > IRQ3 >IRQ0 ...). b. If I = 1 and UI = 0, only NMI, IRQ 2, and IRQ3 are unmasked. c. If I = 1 and UI = 1, all interrupts are masked except NMI. Figure 5.5 shows the transitions among the above states. 91 I0 a. All interrupts are unmasked I0 b. Only NMI, IRQ 2 , and IRQ 3 are unmasked I 1, UI 0 Exception handling, or I 1, UI 1 UI 0 Exception handling, or UI 1 c. All interrupts are masked except NMI Figure 5.5 Interrupt Masking State Transitions (Example) Figure 5.6 is a flowchart showing how interrupts are accepted when UE = 0. * If an interrupt condition occurs and the corresponding interrupt enable bit is set to 1, an interrupt request is sent to the interrupt controller. * When the interrupt controller receives one or more interrupt requests, it selects the highestpriority request, following the IPR interrupt priority settings, and holds other requests pending. If two or more interrupts with the same IPR setting are requested simultaneously, the interrupt controller follows the priority order shown in table 5.3. * The interrupt controller checks the I bit. If the I bit is cleared to 0, the selected interrupt request is accepted regardless of its IPR setting, and regardless of the UI bit. If the I bit is set to 1 and the UI bit is cleared to 0, only interrupts with priority level 1 are accepted; interrupt requests with priority level 0 are held pending. If the I bit and UI bit are both set to 1, all other interrupt requests are held pending. * When an interrupt request is accepted, interrupt exception handling starts after execution of the current instruction has been completed. * In interrupt exception handling, PC and CCR are saved to the stack area. The PC value that is saved indicates the address of the first instruction that will be executed after the return from the interrupt service routine. * The I and UI bits are set to 1 in CCR, masking all interrupts except NMI. * The vector address of the accepted interrupt is generated, and the interrupt service routine starts executing from the address indicated by the contents of the vector address. 92 Program execution state No Interrupt requested? Yes Yes NMI No No Pending Priority level 1? Yes IRQ 0 No IRQ 0 Yes IRQ 1 No Yes No IRQ 1 Yes No Yes TEI1 TEI1 Yes Yes No I=0 No I=0 Yes Yes No UI = 0 Yes Save PC and CCR I 1, UI 1 Read vector address Branch to interrupt service routine Figure 5.6 Process Up to Interrupt Acceptance when UE = 0 93 94 (2) (1) (4) High (3) Instruction Internal prefetch processing Figure 5.7 Interrupt Exception Handling Sequence (8) (7) (10) (9) (12) (11) Vector fetch (14) (13) (6), (8) PC and CCR saved to stack (9), (11) Vector address (10), (12) Starting address of interrupt service routine (contents of vector address) (13) Starting address of interrupt service routine; (13) = (10), (12) (14) First instruction of interrupt service routine (6) (5) Stack Prefetch of interrupt Internal service routine processing instruction Note: Mode 2, with program code and stack in external memory area accessed in two states via 16-bit bus. Instruction prefetch address (not executed; return address, same as PC contents) (2), (4) Instruction code (not executed) (3) Instruction prefetch address (not executed) (5) SP - 2 (7) SP - 4 (1) D15 to D8 HWR , LWR RD Address bus Interrupt request signal Interrupt level decision and wait for end of instruction Interrupt accepted 5.4.2 Interrupt Exception Handling Sequence Figure 5.7 shows the interrupt exception handling sequence in mode 2 when the program code and stack are in an external memory area accessed in two states via a 16-bit bus. 5.4.3 Interrupt Response Time Table 5.5 indicates the interrupt response time from the occurrence of an interrupt request until the first instruction of the interrupt service routine is executed. Table 5.5 Interrupt Response Time External Memory No. Item On-Chip Memory 1 8-Bit Bus 2 States 3 States 2* 1 2 States 2* 1 3 States 2* 1 1 Interrupt priority decision 2* 2 Maximum number of states until end of current instruction 1 to 23 1 to 27 1 to 31*4 1 to 23 1 to 25*4 3 Saving PC and CCR to stack 4 8 12* 4 4 6* 4 4 Vector fetch 4 8 12* 4 4 6* 4 5 Instruction fetch*2 4 8 12* 4 4 6* 4 6 Internal processing* 3 4 4 4 4 4 19 to 41 31 to 57 43 to 73 19 to 41 25 to 49 Total 2* 1 16-Bit Bus Notes: *1 1 state for internal interrupts. *2 Prefetch after the interrupt is accepted and prefetch of the first instruction in the interrupt service routine. *3 Internal processing after the interrupt is accepted and internal processing after vector fetch. *4 The number of states increases if wait states are inserted in external memory access. 95 5.5 Usage Notes 5.5.1 Contention between Interrupt and Interrupt-Disabling Instruction When an instruction clears an interrupt enable bit to 0 to disable the interrupt, the interrupt is not disabled until after execution of the instruction is completed. If an interrupt occurs while a BCLR, MOV, or other instruction is being executed to clear its interrupt enable bit to 0, at the instant when execution of the instruction ends the interrupt is still enabled, so its interrupt exception handling is carried out. If a higher-priority interrupt is also requested, however, interrupt exception handling for the higher-priority interrupt is carried out, and the lower-priority interrupt is ignored. This also applies to the clearing of an interrupt flag to 0. Figure 5.8 shows an example in which an IMIEA bit is cleared to 0 in the 16-bit timer's TISRA register. TISRA write cycle by CPU IMIA exception handling Internal address bus TISRA address Internal write signal IMIEA IMIA IMFA interrupt signal Figure 5.8 Contention between Interrupt and Interrupt-Disabling Instruction This type of contention will not occur if the interrupt is masked when the interrupt enable bit or flag is cleared to 0. 96 5.5.2 Instructions that Inhibit Interrupts The LDC, ANDC, ORC, and XORC instructions inhibit interrupts. When an interrupt occurs, after determining the interrupt priority, the interrupt controller requests a CPU interrupt. If the CPU is currently executing one of these interrupt-inhibiting instructions, however, when the instruction is completed the CPU always continues by executing the next instruction. 5.5.3 Interrupts during EEPMOV Instruction Execution The EEPMOV.B and EEPMOV.W instructions differ in their reaction to interrupt requests. When the EEPMOV.B instruction is executing a transfer, no interrupts are accepted until the transfer is completed, not even NMI. When the EEPMOV.W instruction is executing a transfer, interrupt requests other than NMI are not accepted until the transfer is completed. If NMI is requested, NMI exception handling starts at a transfer cycle boundary. The PC value saved on the stack is the address of the next instruction. Programs should be coded as follows to allow for NMI interrupts during EEPMOV.W execution: L1: EEPMOV.W MOV.W R4,R4 BNE L1 97 98 Section 6 Bus Controller 6.1 Overview The H8/3008 has an on-chip bus controller (BSC) that manages the external address space divided into eight areas. The bus specifications, such as bus width and number of access states, can be set independently for each area, enabling multiple memories to be connected easily. The bus controller also has a bus arbitration function that controls the operation of the internal bus masters--the CPU can release the bus to an external device. 6.1.1 Features The features of the bus controller are listed below. * Manages external address space in area units Manages the external space as eight areas (0 to 7) of 128 kbytes in 1M-byte modes, or 2 Mbytes in 16-Mbyte modes Bus specifications can be set independently for each area * Basic bus interface Chip select (CS0 to CS7) can be output for areas 0 to 7 8-bit access or 16-bit access can be selected for each area Two-state access or three-state access can be selected for each area Program wait states can be inserted for each area Pin wait insertion capability is provided * Idle cycle insertion An idle cycle can be inserted in case of an external read cycle between different areas An idle cycle can be inserted when an external read cycle is immediately followed by an external write cycle * Bus arbitration function A built-in bus arbiter grants the bus right to the CPU, or an external bus master * Other features Choice of two address update modes 99 6.1.2 Block Diagram Figure 6.1 shows a block diagram of the bus controller. CS0 to CS7 ABWCR ASTCR BCR Internal address bus Area decoder Chip select control signals Bus mode control signal Bus size control signal Access state control signal Internal data bus Bus control circuit Wait state controller WAIT Internal signals CSCR ADRCR WCRH WCRL Internal signals CPU bus request signal CPU bus acknowledge signal BRCR Bus arbiter BACK BREQ Legend: ABWCR: ASTCR: WCRH: WCRL: BRCR: CSCR: ADRCR: BCR: Bus width control register Access state control register Wait control register H Wait control register L Bus release control register Chip select control register Address control register Bus control register Figure 6.1 Block Diagram of Bus Controller 100 Wait request signal 6.1.3 Pin Configuration Table 6.1 summarizes the input/output pins of the bus controller. Table 6.1 Bus Controller Pins Name Abbreviation I/O Function Chip select 0 to 7 CS 0 to CS 7 Output Strobe signals selecting areas 0 to 7 Address strobe AS Output Strobe signal indicating valid address output on the address bus Read RD Output Strobe signal indicating reading from the external address space High write HWR Output Strobe signal indicating writing to the external address space, with valid data on the upper data bus (D 15 to D8) Low write LWR Output Strobe signal indicating writing to the external address space, with valid data on the lower data bus (D 7 to D0) Wait WAIT Input Wait request signal for access to external three-state access areas Bus request BREQ Input Request signal for releasing the bus to an external device Bus acknowledge BACK Output Acknowledge signal indicating release of the bus to an external device 101 6.1.4 Register Configuration Table 6.2 summarizes the bus controller's registers. Table 6.2 Bus Controller Registers Address* 1 Name Abbreviation R/W Initial Value H'EE020 Bus width control register ABWCR R/W H'FF* 2 H'EE021 Access state control register ASTCR R/W H'FF H'EE022 Wait control register H WCRH R/W H'FF H'EE023 Wait control register L WCRL R/W H'FF H'EE013 Bus release control register BRCR R/W H'FE*3 H'EE01F Chip select control register CSCR R/W H'0F H'EE01E Address control register ADRCR R/W H'FF H'EE024 Bus control register BCR R/W H'C6 Notes: *1 Lower 20 bits of the address in advanced mode. *2 In modes 2 and 4, the initial value is H'00. *3 In modes 3 and 4, the initial value is H'EE. 6.2 Register Descriptions 6.2.1 Bus Width Control Register (ABWCR) ABWCR is an 8-bit readable/writable register that selects 8-bit or 16-bit access for each area. Bit Modes 1 and 3 Initial value Modes 2 and 4 Initial value 7 6 5 4 3 2 1 0 ABW7 ABW6 ABW5 ABW4 ABW3 ABW2 ABW1 ABW0 1 1 1 1 1 1 1 1 R/W R/W R/W R/W R/W R/W R/W Read/Write R/W 0 Read/Write R/W 0 0 0 0 0 0 0 R/W R/W R/W R/W R/W R/W R/W When ABWCR contains H'FF (selecting 8-bit access for all areas), the chip operates in 8-bit bus mode: the upper data bus (D 15 to D8) is valid, and port 4 is an input/output port. When at least one bit is cleared to 0 in ABWCR, the chip operates in 16-bit bus mode with a 16-bit data bus (D15 to D0). In modes 1 and 3, ABWCR is initialized to H'FF by a reset and in hardware standby mode. In modes 2 and 4, ABWCR is initialized to H'00 by a reset and in hardware standby mode. It is not initialized in software standby mode. 102 Bits 7 to 0--Area 7 to 0 Bus Width Control (ABW7 to ABW0): These bits select 8-bit access or 16-bit access for the corresponding areas. Bits 7 to 0 ABW7 to ABW0 Description 0 Areas 7 to 0 are 16-bit access areas 1 Areas 7 to 0 are 8-bit access areas ABWCR specifies the data bus width of external memory areas. The data bus width of on-chip memory and registers is fixed, and does not depend on ABWCR settings. 6.2.2 Access State Control Register (ASTCR) ASTCR is an 8-bit readable/writable register that selects whether each area is accessed in two states or three states. 7 6 5 4 3 2 1 0 AST7 AST6 AST5 AST4 AST3 AST2 AST1 AST0 Initial value 1 1 1 1 1 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W Bit R/W R/W Bits selecting number of states for access to each area ASTCR is initialized to H'FF by a reset and in hardware standby mode. It is not initialized in software standby mode. Bits 7 to 0--Area 7 to 0 Access State Control (AST7 to AST0): These bits select whether the corresponding area is accessed in two or three states. Bits 7 to 0 AST7 to AST0 Description 0 Areas 7 to 0 are accessed in two states 1 Areas 7 to 0 are accessed in three states (Initial value) ASTCR specifies the number of states in which external areas are accessed. On-chip memory and registers are accessed in a fixed number of states that does not depend on ASTCR settings. 103 6.2.3 Wait Control Registers H and L (WCRH, WCRL) WCRH and WCRL are 8-bit readable/writable registers that select the number of program wait states for each area. On-chip memory and registers are accessed in a fixed number of states that does not depend on WCRH/WCRL settings. WCRH and WCRL are initialized to H'FF by a reset and in hardware standby mode. They are not initialized in software standby mode. WCRH 7 6 5 4 3 2 1 0 W71 W70 W61 W60 W51 W50 W41 W40 Initial value 1 1 1 1 1 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W Bit R/W R/W Bits 7 and 6--Area 7 Wait Control 1 and 0 (W71, W70): These bits select the number of program wait states when area 7 in external space is accessed while the AST7 bit in ASTCR is set to 1. Bit 7 W71 Bit 6 W70 Description 0 0 Program wait not inserted when external space area 7 is accessed 1 1 program wait state inserted when external space area 7 is accessed 0 2 program wait states inserted when external space area 7 is accessed 1 3 program wait states inserted when external space area 7 is accessed (Initial value) 1 104 Bits 5 and 4--Area 6 Wait Control 1 and 0 (W61, W60): These bits select the number of program wait states when area 6 in external space is accessed while the AST6 bit in ASTCR is set to 1. Bit 5 W61 Bit 4 W60 Description 0 0 Program wait not inserted when external space area 6 is accessed 1 1 program wait state inserted when external space area 6 is accessed 0 2 program wait states inserted when external space area 6 is accessed 1 3 program wait states inserted when external space area 6 is accessed (Initial value) 1 Bits 3 and 2--Area 5 Wait Control 1 and 0 (W51, W50): These bits select the number of program wait states when area 5 in external space is accessed while the AST5 bit in ASTCR is set to 1. Bit 3 W51 Bit 2 W50 Description 0 0 Program wait not inserted when external space area 5 is accessed 1 1 program wait state inserted when external space area 5 is accessed 0 2 program wait states inserted when external space area 5 is accessed 1 3 program wait states inserted when external space area 5 is accessed (Initial value) 1 Bits 1 and 0--Area 4 Wait Control 1 and 0 (W41, W40): These bits select the number of program wait states when area 4 in external space is accessed while the AST4 bit in ASTCR is set to 1. Bit 1 W41 Bit 0 W40 Description 0 0 Program wait not inserted when external space area 4 is accessed 1 1 program wait state inserted when external space area 4 is accessed 0 2 program wait states inserted when external space area 4 is accessed 1 3 program wait states inserted when external space area 4 is accessed (Initial value) 1 105 WCRL 7 6 5 4 3 2 1 0 W31 W30 W21 W20 W11 W10 W01 W00 Initial value 1 1 1 1 1 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W Bit R/W R/W Bits 7 and 6--Area 3 Wait Control 1 and 0 (W31, W30): These bits select the number of program wait states when area 3 in external space is accessed while the AST3 bit in ASTCR is set to 1. Bit 7 W31 Bit 6 W30 Description 0 0 Program wait not inserted when external space area 3 is accessed 1 1 program wait state inserted when external space area 3 is accessed 0 2 program wait states inserted when external space area 3 is accessed 1 3 program wait states inserted when external space area 3 is accessed (Initial value) 1 Bits 5 and 4--Area 2 Wait Control 1 and 0 (W21, W20): These bits select the number of program wait states when area 2 in external space is accessed while the AST2 bit in ASTCR is set to 1. Bit 5 W21 Bit 4 W20 Description 0 0 Program wait not inserted when external space area 2 is accessed 1 1 program wait state inserted when external space area 2 is accessed 0 2 program wait states inserted when external space area 2 is accessed 1 3 program wait states inserted when external space area 2 is accessed (Initial value) 1 106 Bits 3 and 2--Area 1 Wait Control 1 and 0 (W11, W10): These bits select the number of program wait states when area 1 in external space is accessed while the AST1 bit in ASTCR is set to 1. Bit 3 W11 Bit 2 W10 Description 0 0 Program wait not inserted when external space area 1 is accessed 1 1 program wait state inserted when external space area 1 is accessed 0 2 program wait states inserted when external space area 1 is accessed 1 3 program wait states inserted when external space area 1 is accessed (Initial value) 1 Bits 1 and 0--Area 0 Wait Control 1 and 0 (W01, W00): These bits select the number of program wait states when area 0 in external space is accessed while the AST0 bit in ASTCR is set to 1. Bit 1 W01 Bit 0 W00 Description 0 0 Program wait not inserted when external space area 0 is accessed 1 1 program wait state inserted when external space area 0 is accessed 0 2 program wait states inserted when external space area 0 is accessed 1 3 program wait states inserted when external space area 0 is accessed (Initial value) 1 107 6.2.4 Bus Release Control Register (BRCR) BRCR is an 8-bit readable/writable register that enables address output on bus lines A23 to A20 and enables or disables release of the bus to an external device. Bit 7 6 5 4 3 2 1 0 A23E A22E A21E A20E -- -- -- BRLE Modes Initial value 1 1 and 2 Read/Write -- Modes Initial value 1 3 and 4 Read/Write R/W 1 1 1 1 1 1 0 -- -- -- -- -- -- R/W 1 1 0 1 1 1 0 R/W R/W -- -- -- -- R/W Reserved bits Address 23 to 20 enable These bits enable PA7 to PA4 to be used for A23 to A20 address output Bus release enable Enables or disables release of the bus to an external device BRCR is initialized to H'FE in modes 1 and 2, and to H'EE in modes 3 and 4, by a reset and in hardware standby mode. It is not initialized in software standby mode. Bit 7--Address 23 Enable (A23E): Enables PA4 to be used as the A23 address output pin. Writing 0 in this bit enables A23 output from PA4. In modes other than 3 and 4, this bit cannot be modified and PA4 has its ordinary port functions. Bit 7 A23E Description 0 PA4 is the A 23 address output pin 1 PA4 is an input/output pin (Initial value) Bit 6--Address 22 Enable (A22E): Enables PA5 to be used as the A22 address output pin. Writing 0 in this bit enables A22 output from PA5. In modes other than 3 and 4, this bit cannot be modified and PA5 has its ordinary port functions. Bit 6 A22E Description 0 PA5 is the A 22 address output pin 1 PA5 is an input/output pin 108 (Initial value) Bit 5--Address 21 Enable (A21E): Enables PA6 to be used as the A21 address output pin. Writing 0 in this bit enables A21 output from PA6. In modes other than 3 and 4, this bit cannot be modified and PA6 has its ordinary port functions. Bit 5 A21E Description 0 PA6 is the A 21 address output pin 1 PA6 is an input/output pin (Initial value) Bit 4--Address 20 Enable (A20E): Enables PA7 to be used as an address output pin. When 0 is written to this bit, PA7 functions as address output A20. In modes 3 and 4, PA 7 functions as an address output pin, and in modes 1 and 2, as a normal port pin. Bit 4 A20E Description 0 PA7 is the A 20 address output pin (In mode 3 or 4) 1 PA7 is an input/output pin (In mode 1 or 2) Bits 3 to 1--Reserved: These bits cannot be modified and are always read as 1. Bit 0--Bus Release Enable (BRLE): Enables or disables release of the bus to an external device. Bit 0 BRLE Description 0 The bus cannot be released to an external device BREQ and BACK can be used as input/output pins 1 6.2.5 (Initial value) The bus can be released to an external device Bus Control Register (BCR) 7 6 5 4 3 2 1 0 ICIS1 ICIS0 -- -- -- -- RDEA WAITE Initial value 1 1 0*1 0*1 0*1 1*2 1 0 Read/Write R/W R/W -- -- -- -- R/W Bit R/W Notes: *1 1 must not be written in bits 5 to 3. *2 0 must not be written in bit 2. BCR is an 8-bit readable/writable register that enables or disables idle cycle insertion, selects the area division unit, selects the extended memory map, and enables or disables WAIT pin input. 109 BCR is initialized to H'C6 by a reset and in hardware standby mode. It is not initialized in software standby mode. Bit 7--Idle Cycle Insertion 1 (ICIS1): Selects whether one idle cycle state is to be inserted between bus cycles in case of consecutive external read cycles for different areas. Bit 7 ICIS1 Description 0 No idle cycle inserted in case of consecutive external read cycles for different areas 1 Idle cycle inserted in case of consecutive external read cycles for different areas (Initial value) Bit 6--Idle Cycle Insertion 0 (ICIS0): Selects whether one idle cycle state is to be inserted between bus cycles in case of consecutive external read and write cycles. Bit 6 ICIS0 Description 0 No idle cycle inserted in case of consecutive external read and write cycles 1 Idle cycle inserted in case of consecutive external read and write cycles (Initial value) Bits 5 to 3--Reserved (must not be set to 1): These bits can be read and written, but must not be set to 1. Normal operation cannot be guaranteed if 1 is written in these bits. Bit 2-- Reserved (must not be set to 0): This bit can be read and written, but must not be set to 0. Normal operation cannot be guaranteed if 0 is written in this bit. Bit 1--Area Division Unit Select (RDEA): Selects the memory map area division units. This bit is valid in modes 3 and 4, and is invalid in modes 1 and 2. Bit 1 RDEA Description 0 Area divisions are as follows: 1 110 Area 0: 2 Mbytes Area 4: 1.93 Mbytes Area 1: 2 Mbytes Area 5: 4 kbytes Area 2: 8 Mbytes Area 6: 23.75 kbytes Area 3: 2 Mbytes Area 7: 22 bytes Areas 0 to 7 are the same size (2 Mbytes) (Initial value) Bit 0--WAIT Pin Enable (WAITE): Enables or disables wait insertion by means of the WAIT pin. Bit 0 WAITE Description 0 WAIT pin wait input is disabled, and the WAIT pin can be used as an input/output port (Initial value) 1 WAIT pin wait input is enabled 6.2.6 Chip Select Control Register (CSCR) CSCR is an 8-bit readable/writable register that enables or disables output of chip select signals (CS7 to CS4). If output of a chip select signal CS7 to CS4 is enabled by a setting in this register, the corresponding pin functions a chip select signal (CS7 to CS4) output regardless of any other settings. Bit 7 6 5 4 3 2 1 0 CS7E CS6E CS5E CS4E -- -- -- -- Initial value 0 0 0 0 1 1 1 1 Read/Write R/W R/W R/W -- -- -- -- R/W Chip select 7 to 4 enable These bits enable or disable chip select signal output Reserved bits CSCR is initialized to H'0F by a reset and in hardware standby mode. It is not initialized in software standby mode. Bits 7 to 4--Chip Select 7 to 4 Enable (CS7E to CS4E): These bits enable or disable output of the corresponding chip select signal. Bit n CSnE Description 0 Output of chip select signal CSn is disabled 1 Output of chip select signal CSn is enabled (Initial value) Note: n = 7 to 4 Bits 3 to 0--Reserved: These bits cannot be modified and are always read as 1. 111 6.2.7 Address Control Register (ADRCR) ADRCR is an 8-bit readable/writable register that selects either address update mode 1 or address update mode 2 as the address output method. Bit 7 6 5 4 3 2 1 0 -- -- -- -- -- -- -- ADRCTL Initial value 1 1 1 1 1 1 1 1 Read/Write -- -- -- -- -- -- -- Reserved bits R/W Address control Selects address update mode 1 or address update mode 2 ADRCR is initialized to H'FF by a reset and in hardware standby mode. It is not initialized in software standby mode. Bits 7 to 1--Reserved: Read-only bits, always read as 1. Bit 0--Address Control (ADRCTL): Selects the address output method. Bit 0 ADRCTL Description 0 Address update mode 2 is selected 1 Address update mode 1 is selected 112 (Initial value) 6.3 Operation 6.3.1 Area Division The external address space is divided into areas 0 to 7. Each area has a size of 128 kbytes in the 1Mbyte modes, or 2 Mbytes in the 16-Mbyte modes. Figure 6.2 shows a general view of the memory map. H' 00000 H' 000000 Area 0 (128 kbytes) H' 1FFFF Area 0 (2 Mbytes) H' 1FFFFF H' 20000 H' 200000 Area 1 (128 kbytes) H' 3FFFF Area 1 (2 Mbytes) H' 3FFFFF H' 40000 H' 400000 Area 2 (128 kbytes) H' 5FFFF Area 2 (2 Mbytes) H' 5FFFFF H' 60000 H' 600000 Area 3 (128 kbytes) H' 7FFFF Area 3 (2 Mbytes) H' 7FFFFF H' 80000 H' 800000 Area 4 (128 kbytes) H' 9FFFF Area 4 (2 Mbytes) H' 9FFFFF H' A0000 H' A00000 Area 5 (128 kbytes) H' BFFFF H' C0000 H' DFFFF H' E0000 Area 5 (2 Mbytes) H' BFFFFF H' C00000 Area 6 (128 kbytes) Area 7 (128 Mbytes) H' DFFFFF H' E00000 Area 6 (2 Mbytes) Area 7 (2 Mbytes) H' FFFFF H' FFFFFF (a) 1-Mbyte modes (modes 1 and 2) (b) 16-Mbyte modes (modes 3 and 4) Figure 6.2 Access Area Map for Each Operating Mode Chip select signals (CS0 to CS7) can be output for areas 0 to 7. The bus specifications for each area are selected in ABWCR, ASTCR, WCRH, and WCRL. In 16-Mbyte mode, the area division units can be selected with the RDEA bit in BCR. 113 Area 0 2 Mbytes Area 0 2 Mbytes Area 1 2 Mbytes Area 1 2 Mbytes 2 Mbytes H'000000 H'1FFFFF 2 Mbytes H'200000 H'3FFFFF Area 2 2 Mbytes H'5FFFFF 2 Mbytes H'400000 Area 2 8 Mbytes 2 Mbytes H'600000 Area 3 2 Mbytes H'7FFFFF 2 Mbytes H'800000 Area 4 2 Mbytes H'9FFFFF 2 Mbytes H'A00000 Area 5 2 Mbytes H'BFFFFF Area 6 2 Mbytes Area 3 2 Mbytes Area 7 1.93 Mbytes Area 4 1.93 Mbytes Internal I/O registers (1) Internal I/O registers (1) 2 Mbytes H'C00000 H'DFFFFF H'E00000 H'FEE000 H'FEE0FF H'FEE100 Reserved 39.75 kbytes H'FF7FFF H'FF8000 Area 6 23.75 kbytes On-chip RAM 4 kbytes On-chip RAM 4 kbytes* Internal I/O registers (2) Internal I/O registers (2) Area 7 22 bytes Area 7 22 bytes (A) Memory map when RDEA = 1 (b) Memory map when RDEA = 0 H'FFEF1F H'FFEF20 H'FFFF1F H'FFFF20 H'FFFFE9 H'FFFFEA H'FFFFFF Note: * Area 6 when the RAME bit is cleared. Figure 6.3 Memory Map in 16-Mbyte Mode 114 Absolute address 8 bits H'FFFEFF H'FFFF00 2 Mbytes Area 7 67.5 kbytes Absolute address 16 bits Area 5 4 kbytes H'FF8FFF H'FF9000 6.3.2 Bus Specifications The external space bus specifications consist of three elements: bus width, number of access states, and number of program wait states. The bus width and number of access states for on-chip memory and internal I/O registers are fixed, and are not affected by the bus controller. Bus Width: A bus width of 8 or 16 bits can be selected with ABWCR. An area for which an 8-bit bus is selected functions as an 8-bit access space, and an area for which a 16-bit bus is selected functions as a16-bit access space. If all areas are designated for 8-bit access, 8-bit bus mode is set; if any area is designated for 16bit access, 16-bit bus mode is set. Number of Access States: Two or three access states can be selected with ASTCR. An area for which two-state access is selected functions as a two-state access space, and an area for which three-state access is selected functions as a three-state access space. When two-state access space is designated, wait insertion is disabled. Number of Program Wait States: When three-state access space is designated in ASTCR, the number of program wait states to be inserted automatically is selected with WCRH and WCRL. From 0 to 3 program wait states can be selected. Table 6.3 shows the bus specifications for each basic bus interface area. Table 6.3 Bus Specifications for Each Area (Basic Bus Interface) ABWCR ASTCR WCRH/WCRL Bus Specifications (Basic Bus Interface) ABWn ASTn Wn1 Wn0 Bus Width Access States Program Wait States 0 0 -- -- 16 2 0 1 0 0 3 0 1 1 1 1 0 2 1 3 0 -- -- 1 0 0 1 8 2 0 3 0 1 1 0 2 1 3 Note: n = 0 to 7 115 6.3.3 Memory Interfaces As its memory interface, the H8/3008 has only a basic bus interface that allows direct connection of ROM, SRAM, and so on. It is not possible to select a DRAM interface that allows direct connection of DRAM, or a burst ROM interface that allows direct connection of burst ROM. 6.3.4 Chip Select Signals For each of areas 0 to 7, the H8/3008 can output a chip select signal (CS0 to CS7) that goes low when the corresponding area is selected in expanded mode. Figure 6.4 shows the output timing of a CSn signal. Output of CS0 to CS3: Output of CS0 to CS3 is enabled or disabled in the data direction register (DDR) of the corresponding port. In the expanded modes with on-chip ROM disabled, a reset leaves pin CS0 in the output state and pins CS1 to CS3 in the input state. To output chip select signals CS1 to CS3, the corresponding DDR bits must be set to 1. In the expanded modes with on-chip ROM enabled, a reset leaves pins CS0 to CS3 in the input state. To output chip select signals CS0 to CS3, the corresponding DDR bits must be set to 1. For details, see section 7, I/O Ports. Output of CS4 to CS7: Output of CS4 to CS7 is enabled or disabled in the chip select control register (CSCR). A reset leaves pins CS4 to CS7 in the input state. To output chip select signals CS4 to CS7, the corresponding CSCR bits must be set to 1. For details, see section 7, I/O Ports. Address bus External address in area n CSn Figure 6.4 CSn Signal Output Timing (n = 0 to 7) When the on-chip ROM, on-chip RAM, and internal I/O registers are accessed, CS0 to CS7 remain high. The CSn signals are decoded from the address signals. They can be used as chip select signals for SRAM and other devices. 116 6.3.5 Address Output Method The H8/3008 provides a choice of two address update methods: either the same method as in the previous H8/300H Series (address update mode 1), or a method in which address updating is restricted to external space accesses (address update mode 2). Figure 6.5 shows examples of address output in these two update modes. On-chip memory cycle External read cycle On-chip memory cycle External read cycle On-chip memory cycle Address bus (Address update mode 1) Address bus (Address update mode 2) RD Figure 6.5 Sample Address Output in Each Address Update Mode (Basic Bus Interface, 3-State Space) Address Update Mode 1: Address update mode 1 is compatible with the previous H8/300H Series. Addresses are always updated between bus cycles. Address Update Mode 2: In address update mode 2, address updating is performed only in external space accesses. In this mode, the address can be retained between an external space read cycle and an instruction fetch cycle (on-chip memory) by placing the program in on-chip memory. Address update mode 2 is therefore useful when connecting a device that requires address hold time with respect to the rise of the RD strobe. Switching between address update modes 1 and 2 is performed by means of the ADRCTL bit in ADRCR. The initial value of ADRCR is the address update mode 1 setting, providing compatibility with the previous H8/300H Series. Cautions: The address output methods are designed so that the initial state with the bit selection method is compatible with the H8/3062F-ZTAT (HD64F3062) (i.e. address update mode 1). However, the following points should be noted. 117 * ADRCR is allocated to address H'FEE01E. In the H8/3062F-ZTAT, the corresponding address is empty space, but it is necessary to confirm that no accesses are made to H'FEE01E in the program. * When address update mode 2 is selected, the address in an internal space (on-chip memory or internal I/O) access cycle is not output externally. * In order to secure address holding with respect to the rise of RD, when address update mode 2 is used an external space read access must be completed within a single access cycle. For example, in a word access to 8-bit access space, the bus cycle is split into two as shown in figure 6.6, and so there is not a single access cycle. In this case, address holding is not guaranteed at the rise of RD between the first (even address) and second (odd address) access cycles (area inside the ellipse in the figure). On-chip memory cycle Address update mode 2 External read cycle (8-bit space word access) Even address On-chip memory cycle Odd address RD Figure 6.6 Example of Consecutive External Space Accesses in Address Update Mode 2 118 6.4 Basic Bus Interface 6.4.1 Overview The basic bus interface enables direct connection of ROM, SRAM, and so on. The bus specifications can be selected with ABWCR, ASTCR, WCRH, and WCRL (see table 6.4). 6.4.2 Data Size and Data Alignment Data sizes for the CPU and other internal bus masters are byte, word, and longword. The bus controller has a data alignment function, and when accessing external space, controls whether the upper data bus (D15 to D8) or lower data bus (D7 to D0) is used according to the bus specifications for the area being accessed (8-bit access area or 16-bit access area) and the data size. 8-Bit Access Areas: Figure 6.7 illustrates data alignment control for 8-bit access space. With 8bit access space, the upper data bus (D15 to D8) is always used for accesses. The amount of data that can be accessed at one time is one byte: a word access is performed as two byte accesses, and a longword access, as four byte accesses. Upper data bus Lower data bus D15 D8 D7 D0 Byte size Word size 1st bus cycle 2nd bus cycle 1st bus cycle Longword size 2nd bus cycle 3rd bus cycle 4th bus cycle Figure 6.7 Access Sizes and Data Alignment Control (8-Bit Access Area) 16-Bit Access Areas: Figure 6.8 illustrates data alignment control for 16-bit access areas. With 16-bit access areas, the upper data bus (D15 to D8) and lower data bus (D7 to D0) are used for accesses. The amount of data that can be accessed at one time is one byte or one word, and a longword access is executed as two word accesses. 119 In byte access, whether the upper or lower data bus is used is determined by whether the address is even or odd. The upper data bus is used for an even address, and the lower data bus for an odd address. Upper data bus Lower data bus D15 D8 D7 D0 Byte size * Even address Byte size * Odd address Word size Longword size 1st bus cycle 2nd bus cycle Figure 6.8 Access Sizes and Data Alignment Control (16-Bit Access Area) 6.4.3 Valid Strobes Table 6.4 shows the data buses used, and the valid strobes, for the access spaces. In a read, the RD signal is valid for both the upper and the lower half of the data bus. In a write, the HWR signal is valid for the upper half of the data bus, and the LWR signal for the lower half. Table 6.4 Area Data Buses Used and Valid Strobes Access Size 8-bit access area Byte 16-bit access area Byte Read/ Write Valid Address Strobe Read -- RD Write -- HWR Even RD Read Odd Lower Data Bus (D7 to D0) Valid Invalid Undetermined data Valid Invalid Invalid Valid Undetermined data Even HWR Valid Odd LWR Undetermined data Valid Read -- RD Valid Valid Write -- HWR, LWR Valid Valid Write Word Upper Data Bus (D15 to D8) Notes: 1. Undetermined data means that unpredictable data is output. 2. Invalid means that the bus is in the input state and the input is ignored. 120 6.4.4 Memory Areas The initial state of each area is basic bus interface, three-state access space. The initial bus width is selected according to the operating mode. Areas 0 to 6: In the H8/3008, the entire space of areas 0 to 6 is external space. When area 0 to 6 external space is accessed, the CS0 to CS6 pin signals respectively can be output. The size of areas 0 to 6 is 128 kbytes in modes 1 and 2, and 2 Mbytes in modes 3 and 4. Area 7: Area 7 includes the on-chip RAM and internal I/O registers. In the H8/3008, the space excluding the on-chip RAM and I/O registers is external space. The on-chip RAM is enabled when the RAME bit in the system control register (SYSCR) is set to 1; when the RAME bit is cleared to 0, the on-chip RAM is disabled and the corresponding space becomes external space . When area 7 external space is accessed, the CS7 signal can be output. The size of area 7 is 128 kbytes in modes 1 and 2, and 2 Mbytes in modes 3 and 4. 121 6.4.5 Basic Bus Control Signal Timing 8-Bit, Three-State-Access Areas: Figure 6.9 shows the timing of bus control signals for an 8-bit, three-state-access area. The upper data bus (D 15 to D8) is used in accesses to these areas. The LWR pin is always high. Wait states can be inserted. Bus cycle T1 T2 T3 Address bus External address in area n CSn AS RD Read access D15 to D8 Valid D7 to D0 Invalid HWR LWR High Write access D15 to D8 D7 to D0 Valid Undetermined data Note: n = 7 to 0 Figure 6.9 Bus Control Signal Timing for 8-Bit, Three-State-Access Area 122 8-Bit, Two-State-Access Areas: Figure 6.10 shows the timing of bus control signals for an 8-bit, two-state-access area. The upper data bus (D 15 to D8) is used in accesses to these areas. The LWR pin is always high. Wait states cannot be inserted. Bus cycle T2 T1 Address bus External address in area n CSn AS RD Read access D15 to D8 Valid D7 to D0 Invalid HWR LWR High Write access D15 to D8 Valid D7 to D0 Undetermined data Note: n = 7 to 0 Figure 6.10 Bus Control Signal Timing for 8-Bit, Two-State-Access Area 123 16-Bit, Three-State-Access Areas: Figures 6.11 to 6.13 show the timing of bus control signals for a 16-bit, three-state-access area. In these areas, the upper data bus (D 15 to D8) is used in accesses to even addresses and the lower data bus (D7 to D0) in accesses to odd addresses. Wait states can be inserted. Bus cycle T1 T2 T3 Address bus Even external address in area n CSn AS RD Read access D15 to D8 Valid D7 to D0 Invalid HWR LWR High Write access D15 to D8 Valid D7 to D0 Undetermined data Note: n = 7 to 0 Figure 6.11 Bus Control Signal Timing for 16-Bit, Three-State-Access Area (1) (Byte Access to Even Address) 124 Bus cycle T1 T2 T3 Address bus Odd external address in area n CSn AS RD Read access D15 to D8 Invalid D7 to D0 Valid HWR High LWR Write access D15 to D8 Undetermined data D7 to D0 Valid Note: n = 7 to 0 Figure 6.12 Bus Control Signal Timing for 16-Bit, Three-State-Access Area (2) (Byte Access to Odd Address) 125 Bus cycle T1 T2 T3 Address bus External address in area n CSn AS RD Read access D15 to D8 Valid D7 to D0 Valid HWR LWR Write access D15 to D8 Valid D7 to D0 Valid Note: n = 7 to 0 Figure 6.13 Bus Control Signal Timing for 16-Bit, Three-State-Access Area (3) (Word Access) 126 16-Bit, Two-State-Access Areas: Figures 6.14 to 6.16 show the timing of bus control signals for a 16-bit, two-state-access area. In these areas, the upper data bus (D15 to D8) is used in accesses to even addresses and the lower data bus (D7 to D0) in accesses to odd addresses. Wait states cannot be inserted. Bus cycle T1 T2 Address bus Even external address in area n CSn AS RD Read access D15 to D8 Valid D7 to D0 Invalid HWR LWR High Write access D15 to D8 Valid D7 to D0 Undetermined data Note: n = 7 to 0 Figure 6.14 Bus Control Signal Timing for 16-Bit, Two-State-Access Area (1) (Byte Access to Even Address) 127 Bus cycle T1 T2 Address bus Odd external address in area n CSn AS RD Read access D15 to D8 Invalid D7 to D0 Valid HWR High LWR Write access D15 to D8 Undetermined data D7 to D0 Valid Note: n = 7 to 0 Figure 6.15 Bus Control Signal Timing for 16-Bit, Two-State-Access Area (2) (Byte Access to Odd Address) 128 Bus cycle T1 T2 Address bus External address in area n CSn AS RD Read access D15 to D8 Valid D7 to D0 Valid HWR LWR Write access D15 to D8 Valid D7 to D0 Valid Note: n = 7 to 0 Figure 6.16 Bus Control Signal Timing for 16-Bit, Two-State-Access Area (3) (Word Access) 6.4.6 Wait Control When accessing external space, the H8/3008 can extend the bus cycle by inserting wait states (Tw). There are two ways of inserting wait states: program wait insertion and pin wait insertion using the WAIT pin. Program Wait Insertion: From 0 to 3 wait states can be inserted automatically between the T2 state and T3 state on an individual area basis in three-state access space, according to the settings of WCRH and WCRL. 129 Pin Wait Insertion: Setting the WAITE bit in BCR to 1 enables wait insertion by means of the WAIT pin. When external space is accessed in this state, a program wait is first inserted. If the WAIT pin is low at the falling edge of in the last T2 or TW state, another TW state is inserted. If the WAIT pin is held low, TW states are inserted until it goes high. This is useful when inserting four or more TW states, or when changing the number of T W states for different external devices. The WAITE bit setting applies to all areas. Figure 6.17 shows an example of the timing for insertion of one program wait state in 3-state space. T1 Inserted by program wait Inserted by WAIT pin T2 Tw Tw Tw T3 WAIT Address bus AS RD Read access Data bus Read data HWR, LWR Write access Data bus Note: Write data indicates the timing of WAIT pin sampling. Figure 6.17 Example of Wait State Insertion Timing 130 6.5 Idle Cycle 6.5.1 Operation When the H8/3008 chip accesses external space, it can insert a 1-state idle cycle (Ti) between bus cycles in the following cases: when read accesses between different areas occur consecutively, and when a write cycle occurs immediately after a read cycle. By inserting an idle cycle it is possible, for example, to avoid data collisions between ROM, which has a long output floating time, and high-speed memory, I/O interfaces, and so on. The initial value of the ICIS1 and ICIS0 bits in BCR is 1, so that idle cycle insertion is performed in the initial state. If there are no data collisions, the ICIS bits can be cleared. Consecutive Reads between Different Areas: If consecutive reads between different areas occur while the ICIS1 bit is set to 1 in BCR, an idle cycle is inserted at the start of the second read cycle. Figure 6.18 shows an example of the operation in this case. In this example, bus cycle A is a read cycle from ROM with a long output floating time, and bus cycle B is a read cycle from SRAM, each being located in a different area. In (a), an idle cycle is not inserted, and a collision occurs in bus cycle B between the read data from ROM and that from SRAM. In (b), an idle cycle is inserted, and a data collision is prevented. Bus cycle A Bus cycle B T1 T2 T3 T1 Bus cycle A Bus cycle B T2 Address bus Address bus RD RD Data bus Data bus Data collision Long buffer-off time (a) Idle cycle not inserted T1 T2 T3 Ti T1 T2 (b) Idle cycle inserted Figure 6.18 Example of Idle Cycle Operation (ICIS1 = 1) Write after Read: If an external write occurs after an external read while the ICIS0 bit is set to 1 in BCR, an idle cycle is inserted at the start of the write cycle. Figure 6.19 shows an example of the operation in this case. In this example, bus cycle A is a read cycle from ROM with a long output floating time, and bus cycle B is a CPU write cycle. In (a), an idle cycle is not inserted, and a collision occurs in bus cycle B between the read data from ROM and the CPU write data. In (b), an idle cycle is inserted, and a data collision is prevented. 131 Bus cycle A Bus cycle B T1 T2 T3 T1 Bus cycle A Bus cycle B T2 Address bus T1 T2 T3 T i T1 T2 Address bus RD RD HWR HWR Data bus Data bus Long buffer-off time Data collision (a) Idle cycle not inserted (b) Idle cycle inserted Figure 6.19 Example of Idle Cycle Operation (ICIS0 = 1) Usage Note: When non-insertion of an idle cycle is specified, the rise (negation) of RD and fall (assertion) of CSn may occur simultaneously. Figure 6.20 shows an example of the operation in this case. If consecutive reads to a different external area occur while the ICIS1 bit in BCR is cleared to 0, or if an external read is followed by a write cycle for a different external area while the ICIS0 bit is cleared to 0, negation of RD in the first read cycle and assertion of CSn in the following bus cycle will occur simultaneously. Depending on the output delay time of each signal, therefore, it is possible that the RD low output in the previous read cycle and the CSn low output in the following bus cycle will overlap. As long as RD and CSn do not change simultaneously, or if there is no problem even if they do, non-insertion of an idle cycle can be specified. Bus cycle A Bus cycle B T1 T2 T3 T1 T2 Bus cycle A Bus cycle B Address bus Address bus RD RD CSn CSn T1 T2 T3 T i T1 Simultaneous change of RD and CSn: possibility of mutual overlap (a) Idle cycle not inserted (b) Idle cycle inserted Figure 6.20 Example of Idle Cycle Operation 132 T2 6.5.2 Pin States in Idle Cycle Table 6.5 shows the pin states in an idle cycle. Table 6.5 Pin States in Idle Cycle Pins Pin State A23 to A 0 Next cycle address value D15 to D0 High impedance CSn High AS High RD High HWR High LWR High 6.6 Bus Arbiter The bus controller has a built-in bus arbiter that arbitrates between different bus masters. The bus master can be either the CPU or an external bus master. When a bus master has the bus right it can carry out read and write operations. Each bus master uses a bus request signal to request the bus right. At fixed times the bus arbiter determines priority and uses a bus acknowledge signal to grant the bus to a bus master, which can the operate using the bus. The bus arbiter checks whether the bus request signal from a bus master is active or inactive, and returns an acknowledge signal to the bus master. When two or more bus masters request the bus, the highest-priority bus master receives an acknowledge signal. The bus master that receives an acknowledge signal can continue to use the bus until the acknowledge signal is deactivated. The bus master priority order is: (High) External bus master > CPU (Low) The bus arbiter samples the bus request signals and determines priority at all times, but it does not always grant the bus immediately, even when it receives a bus request from a bus master with higher priority than the current bus master. Each bus master has certain times at which it can release the bus to a higher-priority bus master. 133 6.6.1 Operation CPU: The CPU is the lowest-priority bus master. If an external bus master requests the bus while the CPU has the bus right, the bus arbiter transfers the bus right to the bus master that requested it. The bus right is transferred at the following times: * The bus right is transferred at the boundary of a bus cycle. If word data is accessed by two consecutive byte accesses, however, the bus right is not transferred between the two byte accesses. * If another bus master requests the bus while the CPU is performing internal operations, such as executing a multiply or divide instruction, the bus right is transferred immediately. The CPU continues its internal operations. * If another bus master requests the bus while the CPU is in sleep mode, the bus right is transferred immediately. External Bus Master: When the BRLE bit is set to 1 in BRCR, the bus can be released to an external bus master. The external bus master has highest priority, and requests the bus right from the bus arbiter driving the BREQ signal low. Once the external bus master acquires the bus, it keeps the bus until the BREQ signal goes high. While the bus is released to an external bus master, the H8/3008 chip holds the address bus, data bus, bus control signals (AS, RD, HWR, and LWR), and chip select signals (CSn: n = 7 to 0) in the high-impedance state, and holds the BACK pin in the low output state. The bus arbiter samples the BREQ pin at the rise of the system clock (). If BREQ is low, the bus is released to the external bus master at the appropriate opportunity. The BREQ signal should be held low until the BACK signal goes low. When the BREQ pin is high in two consecutive samples, the BACK pin is driven high to end the bus-release cycle. Figure 6.21 shows the timing when the bus right is requested by an external bus master during a read cycle in a two-state access area. There is a minimum interval of three states from when the BREQ signal goes low until the bus is released. 134 CPU cycles T0 T1 External bus released High-impedance Address Address bus CPU cycles T2 High-impedance Data bus High-impedance AS RD High-impedance High High-impedance HWR, LWR BREQ BACK Minimum 3 cycles (1) (2) (3) (4) (5) (6) Figure 6.21 Example of External Bus Master Operation When making a transition to software standby mode, if there is contention with a bus request from an external bus master, the BACK and strobe states may be indefinite when the transition is made. When using software standby mode, clear the BRLE bit to 0 in BRCR before executing the SLEEP instruction. 135 6.7 Register and Pin Input Timing 6.7.1 Register Write Timing ABWCR, ASTCR, WCRH, and WCRL Write Timing: Data written to ABWCR, ASTCR, WCRH, and WCRL takes effect starting from the next bus cycle. Figure 6.22 shows the timing when an instruction fetched from area 0 changes area 0 from three-state access to two-state access. T1 T2 T3 T1 T2 T3 T1 T2 Address bus ASTCR address 3-state access to area 0 2-state access to area 0 Figure 6.22 ASTCR Write Timing DDR and CSCR Write Timing: Data written to DDR or CSCR for the port corresponding to the CSn pin to switch between CSn output and generic input takes effect starting from the T3 state of the DDR write cycle. Figure 6.23 shows the timing when the CS1 pin is changed from generic input to CS1 output. T1 T2 T3 Address bus P8DDR address CS1 High-impedance Figure 6.23 DDR Write Timing BRCR Write Timing: Data written to BRCR to switch between A23, A22, A21, or A20 output and generic input or output takes effect starting from the T3 state of the BRCR write cycle. Figure 6.24 shows the timing when a pin is changed from generic input to A 23, A22, A21, or A20 output. 136 T1 T2 T3 Address bus BRCR address PA7 to PA4 (A23 to A20) High-impedance Figure 6.24 BRCR Write Timing 6.7.2 BREQ Pin Input Timing After driving the BREQ pin low, hold it low until BACK goes low. If BREQ returns to the high level before BACK goes lows, the bus arbiter may operate incorrectly. To terminate the external-bus-released state, hold the BREQ signal high for at least three states. If BREQ is high for too short an interval, the bus arbiter may operate incorrectly. 137 138 Section 7 I/O Ports 7.1 Overview The H8/3008 has six input/output ports (ports 4, 6, 8, 9, A, and B) and one input-only port (port 7). Table 7.1 summarizes the port functions. The pins in each port are multiplexed as shown in table 7.1. Each port has a data direction register (DDR) for selecting input or output, and a data register (DR) for storing output data. In addition to these registers, port 4 has an input pull-up control register (PCR) for switching input pull-up transistors on and off. Ports 4, 6, and 8 can drive one TTL load and a 90-pF capacitive load. Ports 9, A, and B can drive one TTL load and a 30-pF capacitive load. Ports 4, 6, 8, 9, A, and B can drive a darlington pair. Pins P82 to P80, PA7 to PA 0 have Schmitt-trigger input circuits. For block diagrams of the ports see appendix C, I/O Port Block Diagrams. Table 7.1 Port Functions Expanded Modes Port Description Pins Mode 1 Mode 2 Mode 3 Mode 4 P47 to P40/D7 to D0 Data input/output (D 7 to D0) and 8-bit generic input/output Port 4 * 8-bit I/O port * Built-in input pull8-bit bus mode: generic input/output up transistors 16-bit bus mode: data input/output Port 6 * 8-bit I/O port P67/ Clock output () and generic input P66/LWR Bus control signal output (LWR, HWR, RD, AS) P65/HWR P64/RD P63/AS P62/BACK P61/BREQ Bus control signal input/output (BACK, BREQ, WAIT) and 3bit generic input/output P60/WAIT Port 7 * 8-bit I/O port P77/AN7/DA1 P76/AN6/DA0 P75 to P70/ AN5 to AN0 Analog input (AN 7, AN 6) to A/D converter, analog output (DA 1, DA0) from D/A converter, and generic input Analog input (AN 5 to AN0) to A/D converter, and generic input 139 Expanded Modes Port Description Port 8 * 5-bit I/O port Pins P84/CS0 Mode 1 Mode 2 Mode 3 Mode 4 DDR = 0: generic input DDR = 1 (reset value): CS0 output * P82 to P80 have schmitt inputs P83/IRQ3/CS1/ ADTRG IRQ3 input, CS1 output, external trigger input (ADTRG) to A/D converter, and generic input DDR = 0 (after reset): generic input DDR = 1: CS1 output P82/IRQ2/CS2 IRQ2 and IRQ1 input, CS2 and CS3 output, and generic input P81/IRQ1/CS3 DDR = 0 (after reset): generic input DDR = 1: CS2 and CS3 output Port 9 * 6-bit I/O port P80/IRQ0 IRQ0 input, and generic input/output P95/IRQ5 /SCK1 Input and output (SCK1, SCK0, RxD1, RxD0, TxD1, TxD0) for serial communication interfaces 1 and 0 (SCI1/0), IRQ5 and IRQ4 input, and 6-bit generic input/output P94/IRQ4 /SCK0 P93/RxD1 P92/RxD0 P91/TxD1 P90/TxD0 Port A * 8-bit I/O port * Schmitt inputs PA 7/TP7/ TIOCB2/A 20 Output (TP7) from proAddress output (A20 ) grammable timing pattern controller (TPC), input or output (TIOCB 2) for 16-bit timer and generic input/output PA 6/TP6/TIOCA 2/ A21 TPC output (TP 6 to TP4), 16-bit timer input and output (TIOCA2, TIOCB1, TIOCA1), and generic input/output PA 5/TP5/TIOCB 1/ A22 PA 4/TP4/TIOCA 1/ A23 PA 3/TP3/TIOCB 0/ TCLKD PA 2/TP2/TIOCA 0/ TCLKC PA 1/TP1/TCLKB PA 0/TP0/TCLKA 140 TPC output (TP 3 to TP0), 16-bit timer input and output (TIOCB0, TIOCA0, TCLKD, TCLKC, TCLKB, TCLKA), 8-bit timer input (TCLKD, TCLKC, TCLKB, TCLKA), and generic input/output Expanded Modes Port Description Port B * 8-bit I/O port Pins PB 7/TP15 Mode 1 Mode 2 Mode 3 Mode 4 TPC output (TP 15 to TP12) and generic input/output PB 6/TP14 PB 5/TP13 PB 4/TP12 PB 3/TP11/TMIO3/ CS4 PB 2/TP10/TMO2/ CS5 TPC output (TP 11 to TP8), 8-bit timer input and output (TMIO3, TMO2, TMIO1, TMO0), CS7 to CS4 output, and generic input/output PB 1/TP9/TMIO1/ CS6 PB 0/TP8/TMO0/ CS7 Legend: SCI0: Serial communication interface channel 0 SCI1: Serial communication interface channel 1 TPC: Programmable timing pattern controller 16TIM: 16-bit timer 8TIM: 8-bit timer 141 7.2 Port 4 7.2.1 Overview Port 4 is an 8-bit input/output port which also functions as a data bus. It's pin configuration is shown in figure 7.1. The pin functions differ depending on the operating mode. In the H8/3008, when the bus width control register (ABWCR) designates areas 0 to 7 all as 8-bitaccess areas, the chip operates in 8-bit bus mode and port 4 is a generic input/output port. When at least one of areas 0 to 7 is designated as a 16-bit-access area, the chip operates in 16-bit bus mode and port 4 becomes part of the data bus. Port 4 has software-programmable built-in pull-up transistors. Pins in port 4 can drive one TTL load and a 90-pF capacitive load. They can also drive a darlington transistor pair. Port 4 Port 4 pins Modes 1 to 4 P47 /D7 P47 (input/output)/D7 (input/output) P46 /D6 P46 (input/output)/D6 (input/output) P45 /D5 P45 (input/output)/D5 (input/output) P44 /D4 P44 (input/output)/D4 (input/output) P43 /D3 P43 (input/output)/D3 (input/output) P42 /D2 P42 (input/output)/D2 (input/output) P41 /D1 P41 (input/output)/D1 (input/output) P40 /D0 P40 (input/output)/D0 (input/output) Figure 7.1 Port 4 Pin Configuration 142 7.2.2 Register Descriptions Table 7.2 summarizes the registers of port 4. Table 7.2 Port 4 Registers Address* Name Abbreviation R/W Initial Value H'EE003 Port 4 data direction register P4DDR W H'00 H'FFFD3 Port 4 data register P4DR R/W H'00 H'EE03E Port 4 input pull-up MOS control register P4PCR R/W H'00 Note: * Lower 20 bits of the address in advanced mode. Port 4 Data Direction Register (P4DDR): P4DDR is an 8-bit write-only register that can select input or output for each pin in port 4. Bit 7 6 5 4 3 2 1 0 P4 7 DDR P4 6 DDR P4 5 DDR P4 4 DDR P4 3 DDR P4 2 DDR P4 1 DDR P4 0 DDR Initial value 0 0 0 0 0 0 0 0 Read/Write W W W W W W W W Port 4 data direction 7 to 0 These bits select input or output for port 4 pins When all areas are designated as 8-bit-access areas by the bus controller's bus width control register (ABWCR), selecting 8-bit bus mode, port 4 functions as an input/output port. In this case, a pin in port 4 becomes an output port if the corresponding P4DDR bit is set to 1, and an input port if this bit is cleared to 0. When at least one area is designated as a 16-bit-access area, selecting 16-bit bus mode, port 4 functions as part of the data bus, regardless of the P4DDR settings. P4DDR is a write-only register. Its value cannot be read. All bits return 1 when read. P4DDR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it retains its previous setting. ABWCR and P4DDR are not initialized in software standby mode. Therefore, if a transition is made to software standby mode while port 4 is functioning as an input/output port and a P4DDR bit is set to 1, the corresponding pin maintains its output state. Port 4 Data Register (P4DR): P4DR is an 8-bit readable/writable register that stores output data for port 4. When port 4 functions as an output port, the value of this register is output. When a bit 143 in P4DDR is set to 1, if port 4 is read the value of the corresponding P4DR bit is returned. When a bit in P4DDR is cleared to 0, if port 4 is read the corresponding pin logic level is read. Bit 7 6 5 4 3 2 1 0 P47 P46 P45 P44 P43 P42 P41 P40 Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Port 4 data 7 to 0 These bits store data for port 4 pins P4DR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it retains its previous setting. Port 4 Input Pull-Up MOS Control Register (P4PCR): P4PCR is an 8-bit readable/writable register that controls the MOS input pull-up transistors in port 4. Bit 7 6 5 4 3 2 1 0 P4 7 PCR P4 6 PCR P4 5 PCR P4 4 PCR P4 3 PCR P4 2 PCR P4 1 PCR P4 0 PCR Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Port 4 input pull-up MOS control 7 to 0 These bits control input pull-up transistors built into port 4 In 8-bit bus mode in modes 1 to 4 (expanded modes), when a P4DDR bit is cleared to 0 (selecting generic input), if the corresponding P4PCR bit is set to 1, the input pull-up transistor is turned on. P4PCR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it retains its previous setting. Table 7.3 summarizes the states of the input pull-up MOS in each operating mode. Table 7.3 Input Pull-Up Transistor States (Port 4) Mode 1 to 4 8-bit bus mode 16-bit bus mode Reset Hardware Standby Mode Software Standby Mode Other Modes Off Off On/off On/off Off Off Legend Off: The input pull-up transistor is always off. On/off: The input pull-up transistor is on if P4PCR = 1 and P4DDR = 0. Otherwise, it is off. 144 7.3 Port 6 7.3.1 Overview Port 6 is an 8-bit input/output port that is also used for input and output of bus control signals (LWR, HWR, RD, AS, BACK, BREQ, WAIT) and for clock () output. The port 6 pin configuration is shown in figure 7.2. See table 7.4 for the selection of the pin functions. Pins in port 6 can drive one TTL load and a 90-pF capacitive load. They can also drive a darlington transistor pair. Port 6 Port 6 pins Modes 1 to 4 (expanded modes) P6 7 / P67 (input)/ (output) P6 6 / LWR LWR (output) P6 5 / HWR HWR (output) P6 4 / RD RD (output) P6 3 / AS AS (output) P6 2 / BACK P62 (input/output)/BACK (output) P6 1 / BREQ P61 (input/output)/BREQ (input) P6 0 / WAIT P60 (input/output)/WAIT (input) Figure 7.2 Port 6 Pin Configuration 7.3.2 Register Descriptions Table 7.4 summarizes the registers of port 6. Table 7.4 Port 6 Registers Address* Name Abbreviation R/W Initial Value H'EE005 Port 6 data direction register P6DDR W H'80 H'FFFD5 Port 6 data register P6DR R/W H'80 Note: * Lower 20 bits of the address in advanced mode. Port 6 Data Direction Register (P6DDR): P6DDR is an 8-bit write-only register that can select input or output for each pin in port 6. 145 Bit 7 is reserved. It is fixed at 1, and cannot be modified. Bit 7 -- 6 5 4 3 2 1 0 P6 6 DDR P6 5 DDR P6 4 DDR P6 3 DDR P6 2 DDR P6 1 DDR P6 0 DDR Initial value 1 0 0 0 0 0 0 0 Read/Write -- W W W W W W W Reserved bit Port 6 data direction 6 to 0 These bits select input or output for port 6 pins * Modes 1 to 4 (Expanded Modes) P6 7 functions as the clock output pin () or an input port. P67 is the clock output pin (o) if the PSTOP bit in MSTRCH is cleared to 0 (initial value), and an input port if this bit is set to 1. P6 6 to P63 function as bus control output pins (LWR, HWR, RD, and AS), regardless of the settings of bits P66DDR to P63DDR. P6 2 to P60 function as bus control input/output pins (BACK, BREQ, and WAIT) or input/output ports. For the method of selecting the pin functions, see table 7.7. When P62 to P60 function as input/output ports, the pin becomes an output port if the corresponding P6DDR bit is set to 1, and an input port if this bit is cleared to 0. Port 6 Data Register (P6DR): P6DR is an 8-bit readable/writable register that stores output data for port 6. When port 6 functions as an output port, the value of this register is output. For bit 7, a value of 1 is returned if the bit is read while the PSTOP bit in MSTCRH is cleared to 0, and the P6 7 pin logic level is returned if the bit is read while the PSTOP bit is set to 1. Bit 7 cannot be modified. For bits 6 to 0, the pin logic level is returned if the bit is read while the corresponding bit in P6DDR is cleared to 0, and the P6DR value is returned if the bit is read while the corresponding bit in P6DDR is set to 1. Bit 7 6 5 4 3 2 1 0 P67 P6 6 P6 5 P6 4 P6 3 P6 2 P6 1 P6 0 Initial value 1 0 0 0 0 0 0 0 Read/Write R R/W R/W R/W R/W R/W R/W R/W Port 6 data 7 to 0 These bits store data for port 6 pins P6DR is initialized to H'80 by a reset and in hardware standby mode. In software standby mode it retains its previous setting. 146 Table 7.5 Port 6 Pin Functions in Modes 1 to 4 Pin Pin Functions and Selection Method P67/ Bit PSTOP in MSTCRH selects the pin function. PSTOP Pin function LWR 0 1 output P67 input Functions as LWR regardless of the setting of bit P66DDR P66DDR 0 1 LWR output Pin function HWR Functions as HWR regardless of the setting of bit P65DDR P65DDR 0 1 HWR output Pin function RD Functions as RD regardless of the setting of bit P64DDR P64DDR 0 1 RD output Pin function AS Functions as AS regardless of the setting of bit P63DDR P63DDR 0 1 AS output Pin function P62/BACK Bit BRLE in BRCR and bit P62DDR select the pin function as follows. BRLE 0 P62DDR Pin function P61/BREQ 0 1 -- P62 input P62 output BACK output Bit BRLE in BRCR and bit P61DDR select the pin function as follows. BRLE 0 P61DDR Pin function P60/WAIT 1 1 0 1 -- P61 input P61 output BREQ input Bit WAITE in BCR and bit P6 0DDR select the pin function as follows. WAITE 0 1 P60DDR 0 1 0* Pin function P60 input P60 output WAIT input Note: * Do not set bit P6 0DDR to 1. 147 7.4 Port 7 7.4.1 Overview Port 7 is an 8-bit input port that is also used for analog input to the A/D converter and analog output from the D/A converter. The pin functions are the same in all operating modes. Figure 7.3 shows the pin configuration of port 7. See section 14, A/D Converter, for details of the A/D converter analog input pins, and section 15, D/A Converter, for details of the D/A converter analog output pins. Port 7 pins P77 (input)/AN 7 (input)/DA 1 (output) P76 (input)/AN 6 (input)/DA 0 (output) P75 (input)/AN 5 (input) P74 (input)/AN 4 (input) Port 7 P73 (input)/AN 3 (input) P72 (input)/AN 2 (input) P71 (input)/AN 1 (input) P70 (input)/AN 0 (input) Figure 7.3 Port 7 Pin Configuration 7.4.2 Register Description Table 7.6 summarizes the port 7 register. Port 7 is an input port, and port 7 has no data direction register. Table 7.6 Port 7 Data Register Address* Name Abbreviation R/W Initial Value H'FFFD6 Port 7 data register P7DR R Undetermined Note: * Lower 20 bits of the address in advanced mode. 148 Port 7 Data Register (P7DR) Bit 7 6 5 4 3 2 1 0 P77 P76 P75 P74 P73 P72 P71 P70 Initial value --* --* --* --* --* --* --* --* Read/Write R R R R R R R R Note: * Determined by pins P7 7 to P70 . When port 7 is read, the pin logic levels are always read. P7DR cannot be modified. 7.5 Port 8 7.5.1 Overview Port 8 is a 5-bit input/output port that is also used for CS3 to CS0 output, IRQ3 to IRQ0 input, and A/D converter ADTRG input. Figure 7.4 shows the pin configuration of port 8. In the H8/3008, port 8 can provide CS3 to CS0 output, IRQ3 to IRQ0 input, and ADTRG input. See table 7.8 for the selection of pin functions in expanded modes. See section 14, A/D Converter, for a description of the A/D converter's ADTRG input pin. The IRQ3 to IRQ0 functions are selected by IER settings, regardless of whether the pin is used for input or output. Caution is therefore required. For details see section 5.3.1, External Interrupts. Pins in port 8 can drive one TTL load and a 90-pF capacitive load. They can also drive a darlington transistor pair. Pins P82 to P80 have Schmitt-trigger inputs. Port 8 pins Port 8 P84 / CS 0 P84 (input)/ CS 0 (output) P83 / CS 1 / IRQ 3 / ADTRG P83 (input)/ CS 1 (output)/ IRQ 3 (input) / ADTRG (input) P82 / CS 2 / IRQ 2 P82 (input)/ CS 2 (output)/ IRQ 2 (input) P81 / CS 3 / IRQ 1 P81 (input)/ CS 3 (output)/ IRQ 1 (input) P80 / IRQ 0 P80 (input/output)/ IRQ 0 (input) Figure 7.4 Port 8 Pin Configuration 149 7.5.2 Register Descriptions Table 7.7 summarizes the registers of port 8. Table 7.7 Port 8 Registers Address* Name Abbreviation R/W Initial Value H'EE007 Port 8 data direction register P8DDR W H'F0 H'FFFD7 Port 8 data register P8DR R/W H'E0 Note: * Lower 20 bits of the address in advanced mode. Port 8 Data Direction Register (P8DDR): P8DDR is an 8-bit write-only register that can select input or output for each pin in port 8. Bits 7 to 5 are reserved. They are fixed at 1, and cannot be modified. Bit 7 6 5 -- -- -- Initial value 1 1 1 1 0 0 0 0 Read/Write -- -- -- W W W W W Reserved bits 4 3 2 1 0 P8 4 DDR P8 3 DDR P8 2 DDR P8 1 DDR P8 0 DDR Port 8 data direction 4 to 0 These bits select input or output for port 8 pins When bits in P8DDR bit are set to 1, P84 to P81 become CS0 to CS3 output pins. When bits in P8DDR are cleared to 0, the corresponding pins become input ports. In the H8/3008, following a reset P84 functions as the CS0 output, while CS1 to CS3 are input ports. P8DDR is a write-only register. Its value cannot be read. All bits return 1 when read. P8DDR is initialized to H'F0 by a reset and in hardware standby mode. In software standby mode P8DDR retains its previous setting. Therefore, if a transition is made to software standby mode while port 8 is functioning as an input/output port and a P8DDR bit is set to 1, the corresponding pin maintains its output state. Port 8 Data Register (P8DR): P8DR is an 8-bit readable/writable register that stores output data for port 8. When port 8 functions as an output port, the value of this register is output. When a bit in P8DDR is set to 1, if port 8 is read the value of the corresponding P8DR bit is returned. When a bit in P8DDR is cleared to 0, if port 8 is read the corresponding pin logic level is read. 150 Bits 7 to 5 are reserved. They are fixed at 1, and cannot be modified. Bit 7 6 5 4 3 2 1 0 -- -- -- P84 P83 P82 P81 P80 Initial value 1 1 1 0 0 0 0 0 Read/Write -- -- -- R/W R/W R/W R/W R/W Reserved bits Port 8 data 4 to 0 These bits store data for port 8 pins P8DR is initialized to H'E0 by a reset and in hardware standby mode. In software standby mode it retains its previous setting. 151 Table 7.8 Port 8 Pin Functions in Modes 1 to 4 Pin Pin Functions and Selection Method P84/CS 0 Bit P84DDR selects the pin function as follows. P84DDR Pin function P83/CS 1/IRQ3/ ADTRG 0 1 P84 input CS 0 output Bit P83DDR selects the pin function as follows P83DDR Pin function 0 1 P83 input CS 1 output IRQ3 input ADTRG input P82/CS 2/IRQ2 Bit P82DDR selects the pin function as follows. P82DDR Pin function 0 1 P82 input CS 2 output IRQ2 input P81/CS 3/IRQ1 Bit P81DDR selects the pin function as follows. P81DDR Pin function 0 1 P81 input CS 3 output IRQ1 input P80/IRQ0 Bit P80DDR selects the pin function as follows. P80DDR Pin function 0 1 P80 input P80 output IRQ0 input 152 7.6 Port 9 7.6.1 Overview Port 9 is a 6-bit input/output port that is also used for input and output (TxD0, TxD1, RxD0, RxD1, SCK0, SCK1) by serial communication interface channels 0 and 1 (SCI0 and SCI1), and for IRQ5 and IRQ4 input. See table 7.10 for the selection of pin functions. The IRQ5 and IRQ4 functions are selected by IER settings, regardless of whether the pin is used for input or output. Caution is therefore required. For details see section 5.3.1, External Interrupts. Port 9 has the same set of pin functions in all operating modes. Figure 7.5 shows the pin configuration of port 9. Pins in port 9 can drive one TTL load and a 30-pF capacitive load. They can also drive a darlington transistor pair. Port 9 pins P95 (input/output)/SCK 1 (input/output)/IRQ 5 (input) P94 (input/output)/SCK 0 (input/output)/IRQ 4 (input) P93 (input/output)/RxD1 (input) Port 9 P92 (input/output)/RxD0 (input) P91 (input/output)/TxD1 (output) P90 (input/output)/TxD0 (output) Figure 7.5 Port 9 Pin Configuration 7.6.2 Register Descriptions Table 7.9 summarizes the registers of port 9. Table 7.9 Port 9 Registers Address* Name Abbreviation R/W Initial Value H'EE008 Port 9 data direction register P9DDR W H'C0 H'FFFD8 Port 9 data register P9DR R/W H'C0 Note: * Lower 20 bits of the address in advanced mode. 153 Port 9 Data Direction Register (P9DDR): P9DDR is an 8-bit write-only register that can select input or output for each pin in port 9. Bits 7 and 6 are reserved. They are fixed at 1, and cannot be modified. Bit 7 6 -- -- Initial value 1 1 0 0 0 0 0 0 Read/Write -- -- W W W W W W 5 4 3 2 1 0 P9 5 DDR P9 4 DDR P9 3 DDR P9 2 DDR P9 1 DDR P9 0 DDR Reserved bits Port 9 data direction 5 to 0 These bits select input or output for port 9 pins When port 9 functions as an input/output port, a pin in port 9 becomes an output port if the corresponding P9DDR bit is set to 1, and an input port if this bit is cleared to 0. For the method of selecting the pin functions, see table 7.10. P9DDR is a write-only register. Its value cannot be read. All bits return 1 when read. P9DDR is initialized to H'C0 by a reset and in hardware standby mode. In software standby mode it retains its previous setting. Therefore, if a transition is made to software standby mode while port 9 is functioning as an input/output port and a P9DDR bit is set to 1, the corresponding pin maintains its output state. Port 9 Data Register (P9DR): P9DR is an 8-bit readable/writable register that stores output data for port 9. When port 9 functions as an output port, the value of this register is output. When a bit in P9DDR is set to 1, if port 9 is read the value of the corresponding P9DR bit is returned. When a bit in P9DDR is cleared to 0, if port 9 is read the corresponding pin logic level is read. Bits 7 and 6 are reserved. They are fixed at 1, and cannot be modified. Bit 7 6 5 4 3 2 1 0 -- -- P95 P94 P93 P92 P91 P90 Initial value 1 1 0 0 0 0 0 0 Read/Write -- -- R/W R/W R/W R/W R/W R/W Reserved bits Port 9 data 5 to 0 These bits store data for port 9 pins P9DR is initialized to H'C0 by a reset and in hardware standby mode. In software standby mode it retains its previous setting. 154 Table 7.10 Port 9 Pin Functions Pin Pin Functions and Selection Method P95/SCK1/IRQ5 Bit C/A in SMR of SCI1, bits CKE0 and CKE1 in SCR, and bit P9 5DDR select the pin function as follows. CKE1 0 C/A 0 CKE0 P95DDR Pin function 1 0 1 -- 1 -- -- 0 1 -- -- -- P95 input P95 output SCK 1 output SCK 1 output SCK 1 input IRQ5 input P94/SCK0/IRQ4 Bit C/A in SMR of SCI0, bits CKE0 and CKE1 in SCR, and bit P9 4DDR select the pin function as follows. CKE1 0 C/A 0 CKE0 P94DDR Pin function 1 0 1 -- 1 -- -- 0 1 -- -- -- P94 input P94 output SCK 0 output SCK 0 output SCK 0 input IRQ4 input P93/RxD1 Bit RE in SCR of SCI1, bit SMIF in SCMR, and bit P9 3DDR select the pin function as follows. SMIF 0 RE P93DDR Pin function P92/RxD0 0 1 1 -- 0 1 -- -- P93 input P93 output RxD1 input RxD1 input Bit RE in SCR of SCI0, bit SMIF in SCMR, and bit P9 2DDR select the pin function as follows. SMIF 0 RE P92DDR Pin function 0 1 1 -- 0 1 -- -- P92 input P92 output RxD0 input RxD0 input 155 Pin Pin Functions and Selection Method P91/TxD1 Bit TE in SCR of SCI1, bit SMIF in SCMR, and bit P9 1DDR select the pin function as follows. SMIF 0 TE P91 DDR Pin function 0 0 1 P91 input P91 output 1 1 -- -- -- TxD1 output TxD1 output* Note: * Functions as the TxD1 output pin, but there are two states: one in which the pin is driven, and another in which the pin is at highimpedance. P90/TxD0 Bit TE in SCR of SCI0, bit SMIF in SCMR, and bit P9 0DDR select the pin function as follows. SMIF 0 TE P90DDR Pin function 0 0 1 P90 input P90 output 1 1 -- -- -- TxD0 output TxD0 output* Note: * Functions as the TxD0 output pin, but there are two states: one in which the pin is driven, and another in which the pin is at highimpedance. 7.7 Port A 7.7.1 Overview Port A is an 8-bit input/output port that is also used for output (TP7 to TP0) from the programmable timing pattern controller (TPC), input and output (TIOCB 2, TIOCA 2, TIOCB1, TIOCA 1, TIOCB0, TIOCA 0, TCLKD, TCLKC, TCLKB, TCLKA) by the 16-bit timer, clock input (TCLKD, TCLKC, TCLKB, TCLKA) to the 8-bit timer, and address output (A23 to A20). A reset or hardware standby transition leaves port A as an input port, except that in modes 3 and 4, one pin is always used for A20 output. See tables 7.12 to 7.14 for the selection of pin functions. Usage of pins for TPC, 16-bit timer, and 8-bit timer input and output is described in the sections on those modules. For output of address bits A23 to A20 in modes 3 and 4, see section 6.2.4, Bus Release Control Register (BRCR). Pins not assigned to any of these functions are available for generic input/output. Figure 7.6 shows the pin configuration of port A. Pins in port A can drive one TTL load and a 30-pF capacitive load. They can also drive a darlington transistor pair. Port A has Schmitt-trigger inputs. 156 Port A Port A pins Pin functions in modes 1 and 2 PA 7 /TP7 /TIOCB2 /A20 PA 7 (input/output)/TP 7 (output)/TIOCB 2 (input/output) PA 6 /TP6 /TIOCA2 /A21 PA 6 (input/output)/TP 6 (output)/TIOCA 2 (input/output) PA 5 /TP5 /TIOCB1 /A22 PA 5 (input/output)/TP 5 (output)/TIOCB 1 (input/output) PA 4 /TP4 /TIOCA1 /A23 PA 4 (input/output)/TP 4 (output)/TIOCA 1 (input/output) PA 3 /TP3 /TIOCB0 /TCLKD PA 3 (input/output)/TP 3 (output)/TIOCB 0 (input/output)/TCLKD (input) PA 2 /TP2 /TIOCA0 /TCLKC PA 2 (input/output)/TP 2 (output)/TIOCA 0 (input/output)/TCLKC (input) PA 1 /TP1 /TCLKB PA 1 (input/output)/TP 1 (output)/TCLKB (input) PA 0 /TP0 /TCLKA PA 0 (input/output)/TP 0 (output)/TCLKA (input) Pin functions in modes 3 and 4 A 20 (output) PA 6 (input/output)/TP6 (output)/TIOCA 2 (input/output)/A 21 (output) PA 5 (input/output)/TP5 (output)/TIOCB 1 (input/output)/A 22 (output) PA 4 (input/output)/TP4 (output)/TIOCA 1 (input/output)/A 23 (output) PA 3 (input/output)/TP3 (output)/TIOCB 0 (input/output)/TCLKD (input) PA 2 (input/output)/TP2 (output)/TIOCA 0 (input/output)/TCLKC (input) PA 1 (input/output)/TP1 (output)/TCLKB (input) PA 0 (input/output)/TP0 (output)/TCLKA (input) Figure 7.6 Port A Pin Configuration 7.7.2 Register Descriptions Table 7.11 summarizes the registers of port A. Table 7.11 Port A Registers Initial Value Address* Name H'EE009 Port A data direction register H'FFFD9 Port A data register R/W Modes 1 and 2 Modes 3 and 4 PADDR W H'00 H'80 PADR R/W H'00 H'00 Note: * Lower 20 bits of the address in advanced mode. Port A Data Direction Register (PADDR): PADDR is an 8-bit write-only register that can select input or output for each pin in port A. When pins are used for TPC output, the corresponding PADDR bits must also be set. 157 Bit 7 6 5 4 3 2 1 0 PA 7 DDR PA 6 DDR PA 5 DDR PA 4 DDR PA 3 DDR PA 2 DDR PA 1 DDR PA 0 DDR Modes Initial value 1 3 and 4 Read/Write -- Modes Initial value 0 1 and 2 Read/Write W 0 0 0 0 0 0 0 W W W W W W W 0 0 0 0 0 0 0 W W W W W W W Port A data direction 7 to 0 These bits select input or output for port A pins The pin functions that can be selected for pins PA 7 to PA 4 differ between modes 1 and 2, and modes 3 and 4. For the method of selecting the pin functions, see tables 7.12 and 7.13. The pin functions that can be selected for pins PA 3 to PA 0 are the same in modes 1 to 4. For the method of selecting the pin functions, see table 7.14. When port A functions as an input/output port, a pin in port A becomes an output port if the corresponding PADDR bit is set to 1, and an input port if this bit is cleared to 0. In modes 3 and 4, PA7DDR is fixed at 1 and PA7 functions as the A20 address output pin. PADDR is a write-only register. Its value cannot be read. All bits return 1 when read. PADDR is initialized to H'00 by a reset and in hardware standby mode in modes 1 and 2. It is initialized to H'80 by a reset and in hardware standby mode in modes 3 and 4. In software standby mode it retains its previous setting. Therefore, if a transition is made to software standby mode while port A is functioning as an input/output port and a PADDR bit is set to 1, the corresponding pin maintains its output state. Port A Data Register (PADR): PADR is an 8-bit readable/writable register that stores output data for port A. When port A functions as an output port, the value of this register is output. When a bit in PADDR is set to 1, if port A is read the value of the corresponding PADR bit is returned. When a bit in PADDR is cleared to 0, if port A is read the corresponding pin logic level is read. Bit 7 6 5 4 3 2 1 0 PA7 PA6 PA5 PA4 PA3 PA2 PA1 PA0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Port A data 7 to 0 These bits store data for port A pins PADR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it retains its previous setting. 158 Table 7.12 Port A Pin Functions (Modes 1 and 2) Pin Pin Functions and Selection Method PA7/TP7/ TIOCB2 Bit PWM2 in TMDR, bits IOB2 to IOB0 in TIOR2, bit NDER7 in NDERA, and bit PA7DDR select the pin function as follows. 16-bit timer channel 2 settings (1) in table below (2) in table below PA7DDR -- 0 1 1 NDER7 -- -- 0 1 TIOCB2 output PA7 input PA7 output TP 7 output Pin function TIOCB2 input* Note: * TIOCB 2 input when IOB2 = 1 and PWM2 = 0. 16-bit timer channel 2 settings (2) IOB2 PA6/TP6/ TIOCA2 (1) (2) 0 1 IOB1 0 0 1 -- IOB0 0 1 -- -- Bit PWM2 in TMDR, bits IOA2 to IOA0 in TIOR2, bit NDER6 in NDERA, and bit PA6DDR select the pin function as follows. 16-bit timer channel 2 settings (1) in table below (2) in table below PA6DDR -- 0 1 1 NDER6 -- -- 0 1 TIOCA2 output PA6 input PA6 output TP 6 output Pin function TIOCA2 input* Note: * TIOCA 2 input when IOA2 = 1. 16-bit timer channel 2 settings (2) (1) PWM2 (2) 0 IOA2 (1) 1 0 1 -- IOA1 0 0 1 -- -- IOA0 0 1 -- -- -- 159 Pin Pin Functions and Selection Method PA5/TP5/ TIOCB1 Bit PWM1 in TMDR, bits IOB2 to IOB0 in TIOR1, bit NDER5 in NDERA, and bit PA5DDR select the pin function as follows. 16-bit timer channel 1 settings (1) in table below (2) in table below PA5DDR -- 0 1 1 NDER5 -- -- 0 1 TIOCB1 output PA5 input PA5 output TP 5 output Pin function TIOCB1 input* Note: * TIOCB 1 input when IOB2 = 1 and PWM1 = 0. 16-bit timer channel 1 settings (2) (1) IOB2 PA4/TP4/ TIOCA1 (2) 0 1 IOB1 0 0 1 -- IOB0 0 1 -- -- Bit PWM1 in TMDR, bits IOA2 to IOA0 in TIOR1, bit NDER4 in NDERA, and bit PA4DDR select the pin function as follows. 16-bit timer channel 1 settings (1) in table below (2) in table below PA4DDR -- 0 1 1 NDER4 -- -- 0 1 TIOCA1 output PA4 input PA4 output TP 4 output Pin function TIOCA1 input* Note: * TIOCA 1 input when IOA2 = 1. 16-bit timer channel 1 settings (2) (1) PWM1 0 IOA2 160 (2) (1) 1 0 1 -- IOA1 0 0 1 -- -- IOA0 0 1 -- -- -- Table 7.13 Port A Pin Functions (Modes 3 and 4) Pin Pin Functions and Selection Method A20 Always used as A20 output. Pin function A20 output PA6/TP6/ Bit PWM2 in TMDR, bits IOA2 to IOA0 in TIOR2, bit NDER6 in NDERA, bit A21E in TIOCA2/A 21 BRCR, and bit PA6DDR select the pin function as follows. A21E 16-bit timer channel 2 settings 1 (1) in table below 0 (2) in table below -- PA6DDR -- 0 1 1 -- NDER6 -- -- 0 1 -- TIOCA2 output PA6 input PA6 output TP 6 output A21 output Pin function TIOCA2 input* Note: * TIOCA 2 input when IOA2 = 1. 16-bit timer channel 2 settings (2) (1) PWM2 (2) 0 IOA2 (1) 1 0 1 -- IOA1 0 0 1 -- -- IOA0 0 1 -- -- -- 161 Pin Pin Functions and Selection Method Bit PWM1 in TMDR, bits IOB2 to IOB0 in TIOR1, bit NDER5 in NDERA, bit A22E in PA5/TP5/ TIOCB1/A 22 BRCR, and bit PA5DDR select the pin function as follows. A22E 16-bit timer channel 1 settings 1 (1) in table below 0 (2) in table below -- PA5DDR -- 0 1 1 -- NDER5 -- -- 0 1 -- TIOCB1 output PA5 input PA5 output TP 5 output A22 output Pin function TIOCB1 input* Note: * TIOCB 1 input when IOB2 = 1 and PWM1 = 0. 16-bit timer channel 1 settings (2) (1) IOB2 (2) 0 1 IOB1 0 0 1 -- IOB0 0 1 -- -- PA4/TP4/ Bit PWM1 in TMDR, bits IOA2 to IOA0 in TIOR1, bit NDER4 in NDERA, bit A23E in TIOCA1/A 23 BRCR, and bit PA4DDR select the pin function as follows. A23E 16-bit timer channel 1 settings 1 (1) in table below 0 (2) in table below -- PA4DDR -- 0 1 1 -- NDER4 -- -- 0 1 -- TIOCA1 output PA4 input PA4 output TP 4 output A23 output Pin function TIOCA1 input* Note: * TIOCA 1 input when IOA2 = 1. 16-bit timer channel 1 settings (2) (1) PWM1 0 IOA2 162 (2) (1) 1 0 1 -- IOA1 0 0 1 -- -- IOA0 0 1 -- -- -- Table 7.14 Port A Pin Functions (Modes 1 to 4) Pin Pin Functions and Selection Method PA3/TP3/ TIOCB0/ TCLKD Bit PWM0 in TMDR, bits IOB2 to IOB0 in TIOR0, bits TPSC2 to TPSC0 in 16TCR2 to 16TCR0 of the 16-bit timer, bits CKS2 to CKS0 in 8TCR2 of the 8-bit timer, bit NDER3 in NDERA, and bit PA 3DDR select the pin function as follows. 16-bit timer channel 0 settings (1) in table below (2) in table below PA3DDR -- 0 1 1 NDER3 -- -- 0 1 TIOCB0 output PA3 input PA3 output TP 3 output Pin function TIOCB0 input* 1 TCLKD input*2 Notes: *1 TIOCB0 input when IOB2 = 1 and PWM0 = 0. *2 TCLKD input when TPSC2 = TPSC1 = TPSC0 = 1 in any of 16TCR2 to 16TCR0, or bits CKS2 to CKS0 in 8TCR2 are as shown in (3) in the table below. 16-bit timer channel 0 settings (2) (1) IOB2 (2) 0 1 IOB1 0 0 1 -- IOB0 0 1 -- -- 8-bit timer channel 2 settings (4) CKS2 0 CKS1 -- CKS0 -- (3) 1 0 0 1 1 -- 163 Pin Pin Functions and Selection Method PA2/TP2/ TIOCA0/ TCLKC Bit PWM0 in TMDR, bits IOA2 to IOA0 in TIOR0, bits TPSC2 to TPSC0 in 16TCR2 to 16TCR0 of the 16-bit timer, bits CKS2 to CKS0 in 8TCR0 of the 8-bit timer, bit NDER2 in NDERA, and bit PA 2DDR select the pin function as follows. 16-bit timer channel 0 settings (1) in table below (2) in table below PA2DDR -- 0 1 1 NDER2 -- -- 0 1 TIOCA0 output PA2 input PA2 output TP 2 output Pin function TIOCA0 input* 1 TCLKC input*2 Notes: *1 TIOCA0 input when IOA2 = 1. *2 TCLKC input when TPSC2 = TPSC1 = 1 and TPSC0 = 0 in any of 16TCR2 to 16TCR0, or bits CKS2 to CKS0 in 8TCR0 are as shown in (3) in the table below. 16-bit timer channel 0 settings (2) (1) PWM0 (1) 0 IOA2 1 0 1 -- IOA1 0 0 1 -- -- IOA0 0 1 -- -- -- 8-bit timer channel 0 settings 164 (2) (4) CKS2 0 CKS1 -- CKS0 -- (3) 1 0 0 1 1 -- Pin Pin Functions and Selection Method PA1/TP1/ TCLKB Bit MDF in TMDR, bits TPSC2 to TPSC0 in 16TCR2 to 16TCR0 of the 16-bit timer, bits CKS2 to CKS0 in 8TCR3 of the 8-bit timer, bit NDER1 in NDERA, and bit PA1DDR select the pin function as follows. PA1DDR 0 1 1 NDER1 -- 0 1 PA1 input PA1 output TP 1 output Pin function TCLKB input* Note: * CLKB input when MDF = 1 in TMDR, or TPSC2 = 1, TPSC1 = 0, and TPSC0 = 1 in any of 16TCR2 to 16TCR0, or bits CKS2 to CKS0 in 8TCR3 are as shown in (1) in the table below. 8-bit timer channel 3 settings PA0/TP0/ TCLKA (2) CKS2 0 CKS1 -- CKS0 -- (1) 1 0 0 1 1 -- Bit MDF in TMDR, bits TPSC2 to TPSC0 in 16TCR2 to 16TCR0 of the 16-bit timer, bits CKS2 to CKS0 in 8TCR1 of the 8-bit timer, bit NDER0 in NDERA, and bit PA0DDR select the pin function as follows. PA0DDR 0 NDER0 -- 0 1 PA0 input PA0 output TP 0 output Pin function 1 TCLKA input* Note: * TCLKA input when MDF = 1 in TMDR, or TPSC2 = 1 and TPSC1 = 0, and TPSC0 = 0 in any of 16TCR2 to 16TCR0, or bits CKS2 to CKS0 in 8TCR1 are as shown in (1) in the table below. 8-bit timer channel 1 settings (2) CKS2 0 CKS1 -- CKS0 -- (1) 1 0 0 1 1 -- 165 7.8 Port B 7.8.1 Overview Port B is an 8-bit input/output port that is also used for output (TP15 to TP8) from the programmable timing pattern controller (TPC), input/output (TMIO3, TMO2, TMIO1, TMO0) by the 8-bit timer, and CS7 to CS4 output. See table 7.15 for the selection of pin functions. A reset or hardware standby transition leaves port B as an input/output port. For output of CS7 to CS4 in modes 1 to 4, see section 6.3.4, Chip Select Signals. Pins not assigned to any of these functions are available for generic input/output. Figure 7.7 shows the pin configuration of port B. Pins in port B can drive one TTL load and a 30-pF capacitive load. They can also drive darlington transistor pair. Port B pins PB7/TP15 PB6/TP14 PB5/TP13 PB4/TP12 Port B PB3/TP11 /TMIO3/CS4 PB2/TP10 /TMO2/CS5 PB1/TP9 /TMIO1/CS6 PB0/TP8 /TMO0/CS7 Pin functions in modes 1 to 4 PB7 (input/output)/TP15 (output) PB6 (input/output)/TP14 (output) PB5 (input/output)/TP13 (output) PB4 (input/output)/TP12 (output) PB3 (input/output)/TP11 (output) /TMIO3 (input/output) /CS4 (output) PB2 (input/output)/TP10 (output) /TMO2 (output) /CS5 (output) PB1 (input/output)/TP9 (output) /TMIO1 (input/output) /CS6 (output) PB0 (input/output)/TP8 (output) /TMO0 (output) /CS7 (output) Figure 7.7 Port B Pin Configuration 166 7.8.2 Register Descriptions Table 7.15 summarizes the registers of port B. Table 7.15 Port B Registers Address* Name Abbreviation R/W Initial Value H'EE00A Port B data direction register PBDDR W H'00 H'FFFDA Port B data register PBDR R/W H'00 Note: * Lower 20 bits of the address in advanced mode. Port B Data Direction Register (PBDDR): PBDDR is an 8-bit write-only register that can select input or output for each pin in port B. When pins are used for TPC output, the corresponding PBDDR bits must also be set. Bit 7 6 5 4 3 2 1 0 PB7 DDR PB6 DDR PB5 DDR PB4 DDR PB3 DDR PB2 DDR PB1 DDR PB0 DDR Initial value 0 0 0 0 0 0 0 0 Read/Write W W W W W W W W Port B data direction 7 to 0 These bits select input or output for port B pins For the method of selecting the pin functions, see table 7.16. When port B functions as an input/output port, a pin in port B becomes an output port if the corresponding PBDDR bit is set to 1, and an input port if this bit is cleared to 0. PBDDR is a write-only register. Its value cannot be read. All bits return 1 when read. PBDDR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it retains its previous setting. Therefore, if a transition is made to software standby mode while port B is functioning as an input/output port and a PBDDR bit is set to 1, the corresponding pin maintains its output state. 167 Port B Data Register (PBDR): PBDR is an 8-bit readable/writable register that stores output data for pins port B. When port B functions as an output port, the value of this register is output. When a bit in PBDDR is set to 1, if port B is read the value of the corresponding PBDR bit is returned. When a bit in PBDDR is cleared to 0, if port B is read the corresponding pin logic level is read. Bit 7 6 5 4 3 2 1 0 PB7 PB6 PB5 PB4 PB3 PB2 PB1 PB0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Port B data 7 to 0 These bits store data for port B pins PBDR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it retains its previous setting. 168 Table 7.16 Port B Pin Functions (Modes 1 to 4) Pin Pin Functions and Selection Method PB7/TP15 Bit NDER15 in NDERB and bit PB7DDR select the pin function as follows. PB7DDR 0 1 1 NDER15 -- 0 1 PB7 input PB7 output TP 15 output Pin function PB6/TP14 Bit NDER14 in NDERB and bit PB6DDR select the pin function as follows. PB6DDR 0 1 1 NDER14 -- 0 1 PB6 input PB6 output TP 14 output Pin function PB5/TP13 Bit NDER13 in NDERB and bit PB5DDR select the pin function as follows. PB5DDR 0 1 1 NDER13 -- 0 1 PB5 input PB5 output TP 13 output Pin function PB4/TP12 Bit NDER12 in NDERB and bit PB4DDR select the pin function as follows. PB4DDR 0 1 1 NDER12 -- 0 1 PB4 input PB4 output TP 12 output Pin function PB3/TP11 / TMIO3/CS 4 Bits OIS3/2 and OS1/0 in 8TCSR3, bits CCLR1/0 in 8TCR3, bit CS4E in CSCR, bit NDER11 in NDERB, and bit PB 3DDR select the pin function as follows. OIS3/2 and OS1/0 All 0 CS4E Not all 0 0 1 -- PB3DDR 0 1 1 -- -- NDER11 -- 0 1 -- -- PB3 input PB3 output TP 11 output CS 4 output TMIO3 output Pin function TMIO3 input* Note: * TMIO3 input when bit ICE = 1 in 8TCSR3. 169 Pin Pin Functions and Selection Method PB2/TP10 / TMO2/CS 5 Bits OIS3/2 and OS1/0 in 8TCSR2, bit CS5E in CSCR, bit NDER10 in NDERB, and bit PB2DDR select the pin function as follows. OIS3/2 and OS1/0 All 0 CS5E 0 1 -- PB2DDR 0 1 1 -- -- NDER10 -- 0 1 -- -- PB2 input PB2 output TP 10 output CS 5 output TMIO2 output Pin function PB1/TP9/ TMIO1/CS 6 Not all 0 Bits OIS3/2 and OS1/0 in 8TCSR1, bits CCLR1/0 in 8TCR1, bit CS6E in CSCR, bit NDER9 in NDERB, and bit PB 1DDR select the pin function as follows. OIS3/2 and OS1/0 All 0 CS6E Not all 0 0 1 -- PB1DDR 0 1 1 -- -- NDER9 -- 0 1 -- -- PB1 input PB1 output TP 9 output CS 6 output TMIO1 output Pin function TMIO1 input* Note: * TMIO1 input when bit ICE = 1 in 8TCSR1. PB0/TP8/ TMO0/CS 7 Bits OIS3/2 and OS1/0 in 8TCSR0, bit CS7E in CSCR, bit NDER8 in NDERB, and bit PB0DDR select the pin function as follows. OIS3/2 and OS1/0 All 0 CS7E 0 1 -- PB0DDR 0 1 1 -- -- NDER8 -- 0 1 -- -- PB0 input PB0 output TP 8 output CS 7 output TMO0 output Pin function 170 Not all 0 Section 8 16-Bit Timer 8.1 Overview The H8/3008 has built-in 16-bit timer module with three 16-bit counter channels. 8.1.1 Features 16-bit timer features are listed below. * Capability to process up to 6 pulse outputs or 6 pulse inputs * Six general registers (GRs, two per channel) with independently-assignable output compare or input capture functions * Selection of eight counter clock sources for each channel: Internal clocks: , /2, /4, /8 External clocks: TCLKA, TCLKB, TCLKC, TCLKD * Five operating modes selectable in all channels: Waveform output by compare match Selection of 0 output, 1 output, or toggle output (only 0 or 1 output in channel 2) Input capture function Rising edge, falling edge, or both edges (selectable) Counter clearing function Counters can be cleared by compare match or input capture Synchronization Two or more timer counters (16TCNTs) can be preset simultaneously, or cleared simultaneously by compare match or input capture. Counter synchronization enables synchronous register input and output. PWM mode PWM output can be provided with an arbitrary duty cycle. With synchronization, up to three-phase PWM output is possible * Phase counting mode selectable in channel 2 Two-phase encoder output can be counted automatically. * High-speed access via internal 16-bit bus The 16TCNTs and GRs can be accessed at high speed via a 16-bit bus. * Any initial timer output value can be set * Nine interrupt sources Each channel has two compare match/input capture interrupts and an overflow interrupt. All interrupts can be requested independently. 171 * Output triggering of programmable timing pattern controller (TPC) Compare match/input capture signals from channels 0 to 2 can be used as TPC output triggers. Table 8.1 summarizes the 16-bit timer functions. Table 8.1 16-bit timer Functions Item Channel 0 Channel 1 Clock sources Internal clocks: , /2, /4, /8 Channel 2 External clocks: TCLKA, TCLKB, TCLKC, TCLKD, selectable independently General registers (output compare/input capture registers) GRA0, GRB0 GRA1, GRB1 GRA2, GRB2 Input/output pins TIOCA0, TIOCB0 TIOCA1, TIOCB1 TIOCA2, TIOCB2 Counter clearing function GRA0/GRB0 compare match or input capture GRA1/GRB1 compare match or input capture GRA2/GRB2 compare match or input capture Initial output value setting function Available Available Available Compare match output 0 Available Available Available 1 Available Available Available Toggle Available Available Not available Input capture function Available Available Available Synchronization Available Available Available PWM mode Available Available Available Phase counting mode Not available Not available Available Interrupt sources Three sources Three sources Three sources * Compare match/input * Compare match/input * Compare match/input capture A0 capture A1 capture A2 * Compare match/input * Compare match/input * Compare match/input capture B0 capture B1 capture B2 * Overflow * Overflow * Overflow 172 8.1.2 Block Diagrams 16-bit timer Block Diagram (Overall): Figure 8.1 is a block diagram of the 16-bit timer. TCLKA to TCLKD IMIA0 to IMIA2 IMIB0 to IMIB2 OVI0 to OVI2 Clock selector , /2, /4, /8 Control logic TIOCA0 to TIOCA2 TIOCB0 to TIOCB2 TMDR TOLR TISRA TISRB Internal data bus TSNR Bus interface 16-bit timer channel 0 16-bit timer channel 1 16-bit timer channel 2 TSTR TISRC Module data bus Legend: TSTR: Timer start register (8 bits) TSNR: Timer synchro register (8 bits) TMDR: Timer mode register (8 bits) TOLR: Timer output level setting register (8 bits) TISRA: Timer interrupt status register A (8 bits) TISRB: Timer interrupt status register B (8 bits) TISRC: Timer interrupt status register C (8 bits) Figure 8.1 16-bit timer Block Diagram (Overall) 173 Block Diagram of Channels 0 and 1: 16-bit timer channels 0 and 1 are functionally identical. Both have the structure shown in figure 8.2. TCLKA to TCLKD , /2, /4, /8 TIOCA0 TIOCB0 Clock selector Control logic IMIA0 IMIB0 OVI0 TIOR 16TCR GRB GRA 16TCNT Comparator Module data bus Legend: 16TCNT: GRA, GRB: TCR: TIOR: Timer counter (16 bits) General registers A and B (input capture/output compare registers) (16 bits x 2) Timer control register (8 bits) Timer I/O control register (8 bits) Figure 8.2 Block Diagram of Channels 0 and 1 174 Block Diagram of Channel 2: Figure 8.3 is a block diagram of channel 2 TCLKA to TCLKD , /2, /4, /8 TIOCA2 TIOCB2 Clock selector Control logic IMIA2 IMIB2 OVI2 TIOR2 16TCR2 GRB2 GRA2 16TCNT2 Comparator Module data bus Legend: Timer counter 2 (16 bits) 16TCNT2: GRA2, GRB2: General registers A2 and B2 (input capture/output compare registers) (16 bits x 2) Timer control register 2 (8 bits) TCR2: Timer I/O control register 2 (8 bits) TIOR2: Figure 8.3 Block Diagram of Channel 2 175 8.1.3 Pin Configuration Table 8.2 summarizes the 16-bit timer pins. Table 8.2 16-bit timer Pins Channel Name Abbreviation Input/ Output Common Clock input A TCLKA Input External clock A input pin (phase-A input pin in phase counting mode) Clock input B TCLKB Input External clock B input pin (phase-B input pin in phase counting mode) Clock input C TCLKC Input External clock C input pin Clock input D TCLKD Input External clock D input pin Input capture/output TIOCA0 compare A0 Input/ output GRA0 output compare or input capture pin PWM output pin in PWM mode Input capture/output TIOCB0 compare B0 Input/ output GRB0 output compare or input capture pin Input capture/output TIOCA1 compare A1 Input/ output GRA1 output compare or input capture pin PWM output pin in PWM mode Input capture/output TIOCB1 compare B1 Input/ output GRB1 output compare or input capture pin Input capture/output TIOCA2 compare A2 Input/ output GRA2 output compare or input capture pin PWM output pin in PWM mode Input capture/output TIOCB2 compare B2 Input/ output GRB2 output compare or input capture pin 0 1 2 176 Function 8.1.4 Register Configuration Table 8.3 summarizes the 16-bit timer registers. Table 8.3 16-bit timer Registers Channel Address* 1 Name Abbreviation R/W Initial Value Common H'FFF60 Timer start register TSTR R/W H'F8 H'FFF61 Timer synchro register TSNC R/W H'F8 H'FFF62 Timer mode register TMDR R/W H'98 H'FFF63 Timer output level setting register TOLR W H'FFF64 H'FFF65 0 1 Timer interrupt status register A Timer interrupt status register B TISRA TISRB H'C0 R/(W)* 2 H'88 R/(W)* 2 H'88 2 H'88 H'FFF66 Timer interrupt status register C TISRC R/(W)* H'FFF68 Timer control register 0 16TCR0 R/W H'80 H'FFF69 Timer I/O control register 0 TIOR0 R/W H'88 H'FFF6A Timer counter 0H 16TCNT0H R/W H'00 H'FFF6B Timer counter 0L 16TCNT0L R/W H'00 H'FFF6C General register A0H GRA0H R/W H'FF H'FFF6D General register A0L GRA0L R/W H'FF H'FFF6E General register B0H GRB0H R/W H'FF H'FFF6F General register B0L GRB0L R/W H'FF H'FFF70 Timer control register 1 16TCR1 R/W H'80 H'FFF71 Timer I/O control register 1 TIOR1 R/W H'88 H'FFF72 Timer counter 1H 16TCNT1H R/W H'00 H'FFF73 Timer counter 1L 16TCNT1L R/W H'00 H'FFF74 General register A1H GRA1H R/W H'FF H'FFF75 General register A1L GRA1L R/W H'FF H'FFF76 General register B1H GRB1H R/W H'FF H'FFF77 General register B1L GRB1L R/W H'FF 177 Channel Address* 1 Name Abbreviation R/W Initial Value 2 H'FFF78 Timer control register 2 16TCR2 R/W H'80 H'FFF79 Timer I/O control register 2 TIOR2 R/W H'88 H'FFF7A Timer counter 2H 16TCNT2H R/W H'00 H'FFF7B Timer counter 2L 16TCNT2L R/W H'00 H'FFF7C General register A2H GRA2H R/W H'FF H'FFF7D General register A2L GRA2L R/W H'FF H'FFF7E General register B2H GRB2H R/W H'FF H'FFF7F General register B2L GRB2L R/W H'FF Notes: *1 The lower 20 bits of the address in advanced mode are indicated. *2 Only 0 can be written in bits 3 to 0, to clear the flags. 8.2 Register Descriptions 8.2.1 Timer Start Register (TSTR) TSTR is an 8-bit readable/writable register that starts and stops the timer counter (16TCNT) in channels 0 to 2. Bit 7 6 5 4 3 2 1 0 -- -- -- -- -- STR2 STR1 STR0 Initial value 1 1 1 1 1 0 0 0 Read/Write -- -- -- -- -- R/W R/W R/W Reserved bits Counter start 2 to 0 These bits start and stop 16TCNT2 to 16TCNT0 TSTR is initialized to H'F8 by a reset and in standby mode. Bits 7 to 3--Reserved: These bits cannot be modified and are always read as 1. Bit 2--Counter Start 2 (STR2): Starts and stops timer counter 2 (16TCNT2). Bit 2 STR2 Description 0 16TCNT2 is halted 1 16TCNT2 is counting 178 (Initial value) Bit 1--Counter Start 1 (STR1): Starts and stops timer counter 1 (16TCNT1). Bit 1 STR1 Description 0 16TCNT1 is halted 1 16TCNT1 is counting (Initial value) Bit 0--Counter Start 0 (STR0): Starts and stops timer counter 0 (16TCNT0). Bit 0 STR0 Description 0 16TCNT0 is halted 1 16TCNT0 is counting 8.2.2 (Initial value) Timer Synchro Register (TSNC) TSNC is an 8-bit readable/writable register that selects whether channels 0 to 2 operate independently or synchronously. Channels are synchronized by setting the corresponding bits to 1. Bit 7 6 5 4 3 2 1 0 -- -- -- -- -- SYNC2 SYNC1 SYNC0 Initial value 1 1 1 1 1 0 0 0 Read/Write -- -- -- -- -- R/W R/W R/W Reserved bits Timer sync 2 to 0 These bits synchronize channels 2 to 0 TSNC is initialized to H'F8 by a reset and in standby mode. Bits 7 to 3--Reserved: These bits cannot be modified and are always read as 1. Bit 2--Timer Sync 2 (SYNC2): Selects whether channel 2 operates independently or synchronously. Bit 2 SYNC2 Description 0 Channel 2's timer counter (16TCNT2) operates independently 16TCNT2 is preset and cleared independently of other channels 1 Channel 2 operates synchronously 16TCNT2 can be synchronously preset and cleared (Initial value) 179 Bit 1--Timer Sync 1 (SYNC1): Selects whether channel 1 operates independently or synchronously. Bit 1 SYNC1 Description 0 Channel 1's timer counter (16TCNT1) operates independently 16TCNT1 is preset and cleared independently of other channels 1 Channel 1 operates synchronously 16TCNT1 can be synchronously preset and cleared (Initial value) Bit 0--Timer Sync 0 (SYNC0): Selects whether channel 0 operates independently or synchronously. Bit 0 SYNC0 Description 0 Channel 0's timer counter (16TCNT0) operates independently 16TCNT0 is preset and cleared independently of other channels 1 Channel 0 operates synchronously 16TCNT0 can be synchronously preset and cleared 8.2.3 (Initial value) Timer Mode Register (TMDR) TMDR is an 8-bit readable/writable register that selects PWM mode for channels 0 to 2. It also selects phase counting mode and the overflow flag (OVF) setting conditions for channel 2. Bit 7 6 5 4 3 2 1 0 -- MDF FDIR -- -- PWM2 PWM1 PWM0 Initial value 1 0 0 1 1 0 0 0 Read/Write -- R/W R/W -- -- R/W R/W R/W Reserved bit PWM mode 2 to 0 These bits select PWM mode for channels 2 to 0 Flag direction Selects the setting condition for the overflow flag (OVF) in TISRC Phase counting mode flag Selects phase counting mode for channel 2 Reserved bit TMDR is initialized to H'98 by a reset and in standby mode. 180 Bit 7--Reserved: This bit cannot be modified and is always read as 1. Bit 6--Phase Counting Mode Flag (MDF): Selects whether channel 2 operates normally or in phase counting mode. Bit 6 MDF Description 0 Channel 2 operates normally 1 Channel 2 operates in phase counting mode (Initial value) When MDF is set to 1 to select phase counting mode, 16TCNT2 operates as an up/down-counter and pins TCLKA and TCLKB become counter clock input pins. 16TCNT2 counts both rising and falling edges of TCLKA and TCLKB, and counts up or down as follows. Counting Direction Down-Counting TCLKA pin High Low Low High TCLKB pin Low High High Low Up-Counting In phase counting mode, external clock edge selection by bits CKEG1 and CKEG0 in 16TCR2 and counter clock selection by bits TPSC2 to TPSC0 are invalid, and the above phase counting mode operations take precedence. The counter clearing condition selected by the CCLR1 and CCLR0 bits in 16TCR2 and the compare match/input capture settings and interrupt functions of TIOR2, TISRA, TISRB, TISRC remain effective in phase counting mode. Bit 5--Flag Direction (FDIR): Designates the setting condition for the OVF flag in TISRC. The FDIR designation is valid in all modes in channel 2. Bit 5 FDIR Description 0 OVF is set to 1 in TISRC when 16TCNT2 overflows or underflows 1 OVF is set to 1 in TISRC when 16TCNT2 overflows (Initial value) Bits 4 and 3--Reserved: These bits cannot be modified and are always read as 1. 181 Bit 2--PWM Mode 2 (PWM2): Selects whether channel 2 operates normally or in PWM mode. Bit 2 PWM2 Description 0 Channel 2 operates normally 1 Channel 2 operates in PWM mode (Initial value) When bit PWM2 is set to 1 to select PWM mode, pin TIOCA2 becomes a PWM output pin. The output goes to 1 at compare match with GRA2, and to 0 at compare match with GRB2. Bit 1--PWM Mode 1 (PWM1): Selects whether channel 1 operates normally or in PWM mode. Bit 1 PWM1 Description 0 Channel 1 operates normally 1 Channel 1 operates in PWM mode (Initial value) When bit PWM1 is set to 1 to select PWM mode, pin TIOCA1 becomes a PWM output pin. The output goes to 1 at compare match with GRA1, and to 0 at compare match with GRB1. Bit 0--PWM Mode 0 (PWM0): Selects whether channel 0 operates normally or in PWM mode. Bit 0 PWM0 Description 0 Channel 0 operates normally 1 Channel 0 operates in PWM mode (Initial value) When bit PWM0 is set to 1 to select PWM mode, pin TIOCA0 becomes a PWM output pin. The output goes to 1 at compare match with GRA0, and to 0 at compare match with GRB0. 182 8.2.4 Timer Interrupt Status Register A (TISRA) TISRA is an 8-bit readable/writable register that indicates GRA compare match or input capture and enables or disables GRA compare match and input capture interrupt requests. Bit 7 -- 6 5 4 IMIEA2 IMIEA1 IMIEA0 3 2 1 0 -- IMFA2 IMFA1 IMFA0 Initial value 1 0 0 0 1 0 0 0 Read/Write -- R/W R/W R/W -- R/(W)* R/(W)* R/(W)* Input capture/compare match flags A2 to A0 Status flags indicating GRA compare match or input capture Reserved bit Input capture/compare match interrupt enable A2 to A0 These bits enable or disable interrupts by the IMFA flags Reserved bit Note: * Only 0 can be written, to clear the flag. TISRA is initialized to H'88 by a reset and in standby mode. Bit 7--Reserved: This bit cannot be modified and is always read as 1. Bit 6--Input Capture/Compare Match Interrupt Enable A2 (IMIEA2): Enables or disables the interrupt requested by the IMFA2 when IMFA2 flag is set to 1. Bit 6 IMIEA2 Description 0 IMIA2 interrupt requested by IMFA2 flag is disabled 1 IMIA2 interrupt requested by IMFA2 flag is enabled (Initial value) 183 Bit 5--Input Capture/Compare Match Interrupt Enable A1 (IMIEA1): Enables or disables the interrupt requested by the IMFA1 flag when IMFA1 is set to 1. Bit 5 IMIEA1 Description 0 IMIA1 interrupt requested by IMFA1 flag is disabled 1 IMIA1 interrupt requested by IMFA1 flag is enabled (Initial value) Bit 4--Input Capture/Compare Match Interrupt Enable A0 (IMIEA0): Enables or disables the interrupt requested by the IMFA0 flag when IMFA0 is set to 1. Bit 4 IMIEA0 Description 0 IMIA0 interrupt requested by IMFA0 flag is disabled 1 IMIA0 interrupt requested by IMFA0 flag is enabled (Initial value) Bit 3--Reserved: This bit cannot be modified and is always read as 1. Bit 2--Input Capture/Compare Match Flag A2 (IMFA2): This status flag indicates GRA2 compare match or input capture events. Bit 2 IMFA2 Description 0 [Clearing condition] (Initial value) Read IMFA2 flag when IMFA2 =1, then write 0 in IMFA2 flag 1 184 [Setting conditions] * 16TCNT2 = GRA2 when GRA2 functions as an output compare register * 16TCNT2 value is transferred to GRA2 by an input capture signal when GRA2 functions as an input capture register Bit 1--Input Capture/Compare Match Flag A1 (IMFA1): This status flag indicates GRA1 compare match or input capture events. Bit 1 IMFA1 Description 0 [Clearing condition] (Initial value) Read IMFA1 flag when IMFA1 =1, then write 0 in IMFA1 flag 1 [Setting conditions] * 16TCNT1 = GRA1 when GRA1 functions as an output compare register * 16TCNT1 value is transferred to GRA1 by an input capture signal when GRA1 functions as an input capture register Bit 0--Input Capture/Compare Match Flag A0 (IMFA0): This status flag indicates GRA0 compare match or input capture events. Bit 0 IMFA0 Description 0 [Clearing condition] (Initial value) Read IMFA0 flag when IMFA0 =1, then write 0 in IMFA0 flag 1 [Setting conditions] * 16TCNT0 = GRA0 when GRA0 functions as an output compare register * 16TCNT0 value is transferred to GRA0 by an input capture signal when GRA0 functions as an input capture register 185 8.2.5 Timer Interrupt Status Register B (TISRB) TISRB is an 8-bit readable/writable register that indicates GRB compare match or input capture and enables or disables GRB compare match and input capture interrupt requests. Bit 7 -- 6 5 4 IMIEB2 IMIEB1 IMIEB0 3 2 1 0 -- IMFB2 IMFB1 IMFB0 Initial value 1 0 0 0 1 0 0 0 Read/Write -- R/W R/W R/W -- R/(W)* R/(W)* R/(W)* Input capture/compare match flags B2 to B0 Status flags indicating GRB compare match or input capture Reserved bit Input capture/compare match interrupt enable B2 to B0 These bits enable or disable interrupts by the IMFB flags Reserved bit Note: * Only 0 can be written, to clear the flag. TISRB is initialized to H'88 by a reset and in standby mode. Bit 7--Reserved: This bit cannot be modified and is always read as 1. Bit 6--Input Capture/Compare Match Interrupt Enable B2 (IMIEB2): Enables or disables the interrupt requested by the IMFB2 when IMFB2 flag is set to 1. Bit 6 IMIEB2 Description 0 IMIB2 interrupt requested by IMFB2 flag is disabled 1 IMIB2 interrupt requested by IMFB2 flag is enabled 186 (Initial value) Bit 5--Input Capture/Compare Match Interrupt Enable B1 (IMIEB1): Enables or disables the interrupt requested by the IMFB1 when IMFB1 flag is set to 1. Bit 5 IMIEB1 Description 0 IMIB1 interrupt requested by IMFB1 flag is disabled 1 IMIB1 interrupt requested by IMFB1 flag is enabled (Initial value) Bit 4--Input Capture/Compare Match Interrupt Enable B0 (IMIEB0): Enables or disables the interrupt requested by the IMFB0 when IMFB0 flag is set to 1. Bit 4 IMIEB0 Description 0 IMIB0 interrupt requested by IMFB0 flag is disabled 1 IMIB0 interrupt requested by IMFB0 flag is enabled (Initial value) Bit 3--Reserved: This bit cannot be modified and is always read as 1. Bit 2--Input Capture/Compare Match Flag B2 (IMFB2): This status flag indicates GRB2 compare match or input capture events. Bit 2 IMFB2 Description 0 [Clearing condition] (Initial value) Read IMFB2 flag when IMFB2 =1, then write 0 in IMFB2 flag 1 [Setting conditions] * 16TCNT2 = GRB2 when GRB2 functions as an output compare register * 16TCNT2 value is transferred to GRB2 by an input capture signal when GRB2 functions as an input capture register 187 Bit 1--Input Capture/Compare Match Flag B1 (IMFB1): This status flag indicates GRB1 compare match or input capture events. Bit 1 IMFB1 Description 0 [Clearing condition] (Initial value) Read IMFB1 flag when IMFB1 =1, then write 0 in IMFB1 flag 1 [Setting conditions] * 16TCNT1 = GRB1 when GRB1 functions as an output compare register * 16TCNT1 value is transferred to GRB1 by an input capture signal when GRB1 functions as an input capture register Bit 0--Input Capture/Compare Match Flag B0 (IMFB0): This status flag indicates GRB0 compare match or input capture events. Bit 0 IMFB0 Description 0 [Clearing condition] (Initial value) Read IMFB0 flag when IMFB0 =1, then write 0 in IMFB0 flag 1 188 [Setting conditions] * 16TCNT0 = GRB0 when GRB0 functions as an output compare register * 16TCNT0 value is transferred to GRB0 by an input capture signal when GRB0 functions as an input capture register 8.2.6 Timer Interrupt Status Register C (TISRC) TISRC is an 8-bit readable/writable register that indicates 16TCNT overflow or underflow and enables or disables overflow interrupt requests. 7 6 5 4 3 2 1 0 -- OVIE2 OVIE1 OVIE0 -- OVF2 OVF1 OVF0 Initial value 1 0 0 0 1 0 0 0 Read/Write -- R/W R/W R/W -- R/(W)* R/(W)* R/(W)* Bit Overflow flags 2 to 0 Status flags indicating interrupts by OVF flags Reserved bit Overflow interrupt enable 2 to 0 These bits enable or disable interrupts by the OVF flags Reserved bit Note: * Only 0 can be written, to clear the flag. TISRC is initialized to H'88 by a reset and in standby mode. Bit 7--Reserved: This bit cannot be modified and is always read as 1. Bit 6--Overflow Interrupt Enable 2 (OVIE2): Enables or disables the interrupt requested by the OVF2 when OVF2 flag is set to 1. Bit 6 OVIE2 Description 0 OVI2 interrupt requested by OVF2 flag is disabled 1 OVI2 interrupt requested by OVF2 flag is enabled (Initial value) Bit 5--Overflow Interrupt Enable 1 (OVIE1): Enables or disables the interrupt requested by the OVF1 when OVF1 flag is set to 1. Bit 5 OVIE1 Description 0 OVI1 interrupt requested by OVF1 flag is disabled 1 OVI1 interrupt requested by OVF1 flag is enabled (Initial value) 189 Bit 4--Overflow Interrupt Enable 0 (OVIE0): Enables or disables the interrupt requested by the OVF0 when OVF0 flag is set to 1. Bit 4 OVIE0 Description 0 OVI0 interrupt requested by OVF0 flag is disabled 1 OVI0 interrupt requested by OVF0 flag is enabled (Initial value) Bit 3--Reserved: This bit cannot be modified and is always read as 1. Bit 2--Overflow Flag 2 (OVF2): This status flag indicates 16TCNT2 overflow. Bit 2 OVF2 Description 0 [Clearing condition] (Initial value) Read OVF2 flag when OVF2 =1, then write 0 in OVF2 flag 1 [Setting condition] 16TCNT2 overflowed from H'FFFF to H'0000, or underflowed from H'0000 to H'FFFF Note: 16TCNT underflow occurs when 16TCNT operates as an up/down-counter. Underflow occurs only when channel 2 operates in phase counting mode (MDF = 1 in TMDR). Bit 1--Overflow Flag 1 (OVF1): This status flag indicates 16TCNT1 overflow. Bit 1 OVF1 Description 0 [Clearing condition] (Initial value) Read OVF1 flag when OVF1 =1, then write 0 in OVF1 flag 1 [Setting condition] 16TCNT1 overflowed from H'FFFF to H'0000 Bit 0--Overflow Flag 0 (OVF0): This status flag indicates 16TCNT0 overflow. Bit 0 OVF0 Description 0 [Clearing condition] Read OVF0 flag when OVF0 =1, then write 0 in OVF0 flag 1 [Setting condition] 16TCNT0 overflowed from H'FFFF to H'0000 190 (Initial value) 8.2.7 Timer Counters (16TCNT) 16TCNT is a 16-bit counter. The 16-bit timer has three 16TCNTs, one for each channel. Channel Abbreviation Function 0 16TCNT0 Up-counter 1 16TCNT1 2 16TCNT2 Phase counting mode: up/down-counter Other modes: up-counter Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Initial value 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Each 16TCNT is a 16-bit readable/writable register that counts pulse inputs from a clock source. The clock source is selected by bits TPSC2 to TPSC0 in 16TCR. 16TCNT0 and 16TCNT1 are up-counters. 16TCNT2 is an up/down-counter in phase counting mode and an up-counter in other modes. 16TCNT can be cleared to H'0000 by compare match with GRA or GRB or by input capture to GRA or GRB (counter clearing function). When 16TCNT overflows (changes from H'FFFF to H'0000), the OVF flag is set to 1 in TISRC of the corresponding channel. When 16TCNT underflows (changes from H'0000 to H'FFFF), the OVF flag is set to 1 in TISRC of the corresponding channel. The 16TCNTs are linked to the CPU by an internal 16-bit bus and can be written or read by either word access or byte access. Each 16TCNT is initialized to H'0000 by a reset and in standby mode. 191 8.2.8 General Registers (GRA, GRB) The general registers are 16-bit registers. The 16-bit timer has 6 general registers, two in each channel. Channel Abbreviation Function 0 GRA0, GRB0 Output compare/input capture register 1 GRA1, GRB1 2 GRA2, GRB2 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Initial value 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W A general register is a 16-bit readable/writable register that can function as either an output compare register or an input capture register. The function is selected by settings in TIOR. When a general register is used as an output compare register, its value is constantly compared with the 16TCNT value. When the two values match (compare match), the IMFA or IMFB flag is set to 1 in TISRA/TISRB. Compare match output can be selected in TIOR. When a general register is used as an input capture register, an external input capture signal are detected and the current 16TCNT value is stored in the general register. The corresponding IMFA or IMFB flag in TISRA/TISRB is set to 1 at the same time. The edges of the input capture signal are selected in TIOR. TIOR settings are ignored in PWM mode. General registers are linked to the CPU by an internal 16-bit bus and can be written or read by either word access or byte access. General registers are set as output compare registers (with no pin output) and initialized to H'FFFF by a reset and in standby mode. 192 8.2.9 Timer Control Registers (16TCR) 16TCR is an 8-bit register. The 16-bit timer has three 16TCRs, one in each channel. Channel Abbreviation Function 0 16TCR0 1 16TCR1 2 16TCR2 16TCR controls the timer counter. The 16TCRs in all channels are functionally identical. When phase counting mode is selected in channel 2, the settings of bits CKEG1 and CKEG0 and TPSC2 to TPSC0 in 16TCR2 are ignored. Bit 7 6 5 -- CCLR1 CCLR0 Initial value 1 0 0 0 0 Read/Write -- R/W R/W R/W R/W 4 3 CKEG1 CKEG0 2 1 0 TPSC2 TPSC1 TPSC0 0 0 0 R/W R/W R/W Timer prescaler 2 to 0 These bits select the timer counter clock Clock edge 1/0 These bits select external clock edges Counter clear 1/0 These bits select the counter clear source Reserved bit Each 16TCR is an 8-bit readable/writable register that selects the timer counter clock source, selects the edge or edges of external clock sources, and selects how the counter is cleared. 16TCR is initialized to H'80 by a reset and in standby mode. Bit 7--Reserved: This bit cannot be modified and is always read as 1. 193 Bits 6 and 5--Counter Clear 1 and 0 (CCLR1, CCLR0): These bits select how 16TCNT is cleared. Bit 6 CCLR1 Bit 5 CCLR0 Description 0 0 16TCNT is not cleared 1 (Initial value) 1 1 16TCNT is cleared by GRA compare match or input capture* 0 16TCNT is cleared by GRB compare match or input capture*1 1 Synchronous clear: 16TCNT is cleared in synchronization with other synchronized timers* 2 Notes: *1 16TCNT is cleared by compare match when the general register functions as an output compare register, and by input capture when the general register functions as an input capture register. *2 Selected in TSNC. Bits 4 and 3--Clock Edge 1 and 0 (CKEG1, CKEG0): These bits select external clock input edges when an external clock source is used. Bit 4 CKEG1 Bit 3 CKEG0 Description 0 0 Count rising edges 1 Count falling edges -- Count both edges 1 (Initial value) When channel 2 is set to phase counting mode, bits CKEG1 and CKEG0 in 16TCR2 are ignored. Phase counting takes precedence. Bits 2 to 0--Timer Prescaler 2 to 0 (TPSC2 to TPSC0): These bits select the counter clock source. Bit 2 TPSC2 Bit 1 TPSC1 Bit 0 TPSC0 Function 0 0 0 Internal clock: 1 Internal clock: /2 0 Internal clock: /4 1 Internal clock: /8 0 External clock A: TCLKA input 1 External clock B: TCLKB input 0 External clock C: TCLKC input 1 External clock D: TCLKD input 1 1 0 1 194 (Initial value) When bit TPSC2 is cleared to 0 an internal clock source is selected, and the timer counts only falling edges. When bit TPSC2 is set to 1 an external clock source is selected, and the timer counts the edges selected by bits CKEG1 and CKEG0. When channel 2 is set to phase counting mode (MDF = 1 in TMDR), the settings of bits TPSC2 to TPSC0 in 16TCR2 are ignored. Phase counting takes precedence. 8.2.10 Timer I/O Control Register (TIOR) TIOR is an 8-bit register. The 16-bit timer has three TIORs, one in each channel. Channel Abbreviation Function 0 TIOR0 1 TIOR1 2 TIOR2 Bit TIOR controls the general registers. Some functions differ in PWM mode. 7 6 5 4 3 2 1 0 -- IOB2 IOB1 IOB0 -- IOA2 IOA1 IOA0 Initial value 1 0 0 0 1 0 0 0 Read/Write -- R/W R/W R/W -- R/W R/W R/W I/O control A2 to A0 These bits select GRA functions Reserved bit I/O control B2 to B0 These bits select GRB functions Reserved bit Each TIOR is an 8-bit readable/writable register that selects the output compare or input capture function for GRA and GRB, and specifies the functions of the TIORA and TIORB pins. If the output compare function is selected, TIOR also selects the type of output. If input capture is selected, TIOR also selects the edges of the input capture signal. TIOR is initialized to H'88 by a reset and in standby mode. Bit 7--Reserved: This bit cannot be modified and is always read as 1. 195 Bits 6 to 4--I/O Control B2 to B0 (IOB2 to IOB0): These bits select the GRB function. Bit 6 IOB2 Bit 5 IOB1 Bit 4 IOB0 0 0 0 1 1 1 0 GRB is an output compare register No output at compare match (Initial value) 0 output at GRB compare match* 1 0 1 output at GRB compare match* 1 1 Output toggles at GRB compare match (1 output in channel 2)*1, * 2 0 1 1 Function GRB is an input compare register 0 GRB captures rising edge of input GRB captures falling edge of input GRB captures both edges of input 1 Notes: *1 After a reset, the output conforms to the TOLR setting until the first compare match. *2 Channel 2 output cannot be toggled by compare match. When this setting is made, 1 output is selected automatically. Bit 3--Reserved: This bit cannot be modified and is always read as 1. Bits 2 to 0--I/O Control A2 to A0 (IOA2 to IOA0): These bits select the GRA function. Bit 2 IOA2 Bit 1 IOA1 Bit 0 IOA0 0 0 0 1 1 1 0 GRA is an output compare register No output at compare match (Initial value) 0 output at GRA compare match* 1 0 1 output at GRA compare match* 1 1 Output toggles at GRA compare match (1 output in channel 2)*1, * 2 0 1 1 Function 0 GRA is an input compare register GRA captures rising edge of input GRA captures falling edge of input GRA captures both edges of input 1 Notes: *1 After a reset, the output conforms to the TOLR setting until the first compare match. *2 Channel 2 output cannot be toggled by compare match. When this setting is made, 1 output is selected automatically. 196 8.2.11 Timer Output Level Setting Register C (TOLR) TOLR is an 8-bit write-only register that selects the timer output level for channels 0 to 2. Bit 7 6 5 4 3 2 1 0 -- -- TOB2 TOA2 TOB1 TOA1 TOB0 TOA0 Initial value 1 1 0 0 0 0 0 0 Read/Write -- -- W W W W W W Output level setting A2 to A0, B2 to B0 These bits set the levels of the timer outputs (TIOCA2 to TIOCA0, and TIOCB2 to TIOCB0) Reserved bits A TOLR setting can only be made when the corresponding bit in TSTR is 0. TOLR is a write-only register, and cannot be read. If it is read, all bits will return a value of 1. TOLR is initialized to H'C0 by a reset and in standby mode. Bits 7 and 6--Reserved: These bits cannot be modified. Bit 5--Output Level Setting B2 (TOB2): Sets the value of timer output TIOCB2. Bit 5 TOB2 Description 0 TIOCB2 is 0 1 TIOCB2 is 1 (Initial value) Bit 4--Output Level Setting A2 (TOA2): Sets the value of timer output TIOCA 2. Bit 4 TOA2 Description 0 TIOCA2 is 0 1 TIOCA2 is 1 (Initial value) 197 Bit 3--Output Level Setting B1 (TOB1): Sets the value of timer output TIOCB1. Bit 3 TOB1 Description 0 TIOCB1 is 0 1 TIOCB1 is 1 (Initial value) Bit 2--Output Level Setting A1 (TOA1): Sets the value of timer output TIOCA 1. Bit 2 TOA1 Description 0 TIOCA1 is 0 1 TIOCA1 is 1 (Initial value) Bit 1--Output Level Setting B0 (TOB0): Sets the value of timer output TIOCB0. Bit 0 TOB0 Description 0 TIOCB0 is 0 1 TIOCB0 is 1 (Initial value) Bit 0--Output Level Setting A0 (TOA0): Sets the value of timer output TIOCA 0. Bit 0 TOA0 Description 0 TIOCA0 is 0 1 TIOCA0 is 1 198 (Initial value) 8.3 CPU Interface 8.3.1 16-Bit Accessible Registers The timer counters (16TCNTs), general registers A and B (GRAs and GRBs) are 16-bit registers, and are linked to the CPU by an internal 16-bit data bus. These registers can be written or read a word at a time, or a byte at a time. Figures 8.4 and 8.5 show examples of word read/write access to a timer counter (16TCNT). Figures 8.6 to 8.9 show examples of byte read/write access to 16TCNTH and 16TCNTL. On-chip data bus H CPU H L Bus interface L 16TCNTH Module data bus 16TCNTL Figure 8.4 16TCNT Access Operation [CPU 16TCNT (Word)] On-chip data bus H CPU L H Bus interface L 16TCNTH Module data bus 16TCNTL Figure 8.5 Access to Timer Counter (CPU Reads 16TCNT, Word) 199 On-chip data bus H CPU L H Bus interface L 16TCNTH Module data bus 16TCNTL Figure 8.6 Access to Timer Counter H (CPU Writes to 16TCNTH, Upper Byte) On-chip data bus H CPU L H Bus interface L 16TCNTH Module data bus 16TCNTL Figure 8.7 Access to Timer Counter L (CPU Writes to 16TCNTL, Lower Byte) On-chip data bus H CPU L H Bus interface L 16TCNTH Module data bus 16TCNTL Figure 8.8 Access to Timer Counter H (CPU Reads 16TCNTH, Upper Byte) 200 On-chip data bus H CPU H L Bus interface L 16TCNTH Module data bus 16TCNTL Figure 8.9 Access to Timer Counter L (CPU Reads 16TCNTL, Lower Byte) 8.3.2 8-Bit Accessible Registers The registers other than the timer counters and general registers are 8-bit registers. These registers are linked to the CPU by an internal 8-bit data bus. Figures 8.10 and 8.11 show examples of byte read and write access to a 16TCR. If a word-size data transfer instruction is executed, two byte transfers are performed. On-chip data bus H CPU H L Bus interface L Module data bus 16TCR Figure 8.10 16TCR Access (CPU Writes to 16TCR) On-chip data bus H CPU L H Bus interface L Module data bus 16TCR Figure 8.11 16TCR Access (CPU Reads 16TCR) 201 8.4 Operation 8.4.1 Overview A summary of operations in the various modes is given below. Normal Operation: Each channel has a timer counter and general registers. The timer counter counts up, and can operate as a free-running counter, periodic counter, or external event counter. GRA and GRB can be used for input capture or output compare. Synchronous Operation: The timer counters in designated channels are preset synchronously. Data written to the timer counter in any one of these channels is simultaneously written to the timer counters in the other channels as well. The timer counters can also be cleared synchronously if so designated by the CCLR1 and CCLR0 bits in the TCRs. PWM Mode: A PWM waveform is output from the TIOCA pin. The output goes to 1 at compare match A and to 0 at compare match B. The duty cycle can be varied from 0% to 100% depending on the settings of GRA and GRB. When a channel is set to PWM mode, its GRA and GRB automatically become output compare registers. Phase Counting Mode: The phase relationship between two clock signals input at TCLKA and TCLKB is detected and 16TCNT2 counts up or down accordingly. When phase counting mode is selected TCLKA and TCLKB become clock input pins and 16TCNT2 operates as an up/downcounter. 8.4.2 Basic Functions Counter Operation: When one of bits STR0 to STR2 is set to 1 in the timer start register (TSTR), the timer counter (16TCNT) in the corresponding channel starts counting. The counting can be free-running or periodic. * Sample setup procedure for counter Figure 8.12 shows a sample procedure for setting up a counter. 202 Counter setup Select counter clock Count operation 1 No Yes Free-running counting Periodic counting Select counter clear source 2 Select output compare register function 3 Set period 4 Start counter 5 Periodic counter Start counter 5 Free-running counter Figure 8.12 Counter Setup Procedure (Example) 1. Set bits TPSC2 to TPSC0 in 16TCR to select the counter clock source. If an external clock source is selected, set bits CKEG1 and CKEG0 in 16TCR to select the desired edge(s) of the external clock signal. 2. For periodic counting, set CCLR1 and CCLR0 in 16TCR to have 16TCNT cleared at GRA compare match or GRB compare match. 3. Set TIOR to select the output compare function of GRA or GRB, whichever was selected in step 2. 4. Write the count period in GRA or GRB, whichever was selected in step 2. 5. Set the STR bit to 1 in TSTR to start the timer counter. 203 * Free-running and periodic counter operation A reset leaves the counters (16TCNTs) in 16-bit timer channels 0 to 2 all set as free-running counters. A free-running counter starts counting up when the corresponding bit in TSTR is set to 1. When the count overflows from H'FFFF to H'0000, the OVF flag is set to 1 in TISRC. After the overflow, the counter continues counting up from H'0000. Figure 8.13 illustrates free-running counting. 16TCNT value H'FFFF H'0000 Time STR0 to STR2 bit OVF Figure 8.13 Free-Running Counter Operation When a channel is set to have its counter cleared by compare match, in that channel 16TCNT operates as a periodic counter. Select the output compare function of GRA or GRB, set bit CCLR1 or CCLR0 in 16TCR to have the counter cleared by compare match, and set the count period in GRA or GRB. After these settings, the counter starts counting up as a periodic counter when the corresponding bit is set to 1 in TSTR. When the count matches GRA or GRB, the IMFA or IMFB flag is set to 1 in TISRA/TISRB and the counter is cleared to H'0000. If the corresponding IMIEA or IMIEB bit is set to 1 in TISRA/TISRB, a CPU interrupt is requested at this time. After the compare match, 16TCNT continues counting up from H'0000. Figure 8.14 illustrates periodic counting. 16TCNT value Counter cleared by general register compare match GR Time H'0000 STR bit IMF Figure 8.14 Periodic Counter Operation 204 * 16TCNT count timing Internal clock source Bits TPSC2 to TPSC0 in 16TCR select the system clock () or one of three internal clock sources obtained by prescaling the system clock (/2, /4, /8). Figure 8.15 shows the timing. Internal clock 16TCNT input clock 16TCNT N-1 N N+1 Figure 8.15 Count Timing for Internal Clock Sources External clock source The external clock pin (TCLKA to TCLKD) can be selected by bits TPSC2 to TPSC0 in 16TCR, and the detected edge by bits CKEG1 and CKEG0. The rising edge, falling edge, or both edges can be selected. The pulse width of the external clock signal must be at least 1.5 system clocks when a single edge is selected, and at least 2.5 system clocks when both edges are selected. Shorter pulses will not be counted correctly. Figure 8.16 shows the timing when both edges are detected. External clock input 16TCNT input clock 16TCNT N-1 N N+1 Figure 8.16 Count Timing for External Clock Sources (when Both Edges are Detected) 205 Waveform Output by Compare Match: In 16-bit timer channels 0, 1 compare match A or B can cause the output at the TIOCA or TIOCB pin to go to 0, go to 1, or toggle. In channel 2 the output can only go to 0 or go to 1. * Sample setup procedure for waveform output by compare match Figure 8.17 shows an example of the setup procedure for waveform output by compare match. Output setup 1. Select the compare match output mode (0, 1, or toggle) in TIOR. When a waveform output mode is selected, the pin switches from its generic input/ output function to the output compare function (TIOCA or TIOCB). An output compare pin outputs the value set in TOLR until the first compare match occurs. Select waveform output mode 1 Set output timing 2 2. Set a value in GRA or GRB to designate the compare match timing. Start counter 3 3. Set the STR bit to 1 in TSTR to start the timer counter. Waveform output Figure 8.17 Setup Procedure for Waveform Output by Compare Match (Example) 206 * Examples of waveform output Figure 8.18 shows examples of 0 and 1 output. 16TCNT operates as a free-running counter, 0 output is selected for compare match A, and 1 output is selected for compare match B. When the pin is already at the selected output level, the pin level does not change. 16TCNT value H'FFFF GRB GRA H'0000 TIOCB TIOCA Time No change No change No change No change 1 output 0 output Figure 8.18 0 and 1 Output (TOA = 1, TOB = 0) Figure 8.19 shows examples of toggle output. 16TCNT operates as a periodic counter, cleared by compare match B. Toggle output is selected for both compare match A and B. 16TCNT value Counter cleared by compare match with GRB GRB GRA H'0000 Time TIOCB Toggle output TIOCA Toggle output Figure 8.19 Toggle Output (TOA = 1, TOB = 0) 207 * Output compare output timing The compare match signal is generated in the last state in which 16TCNT and the general register match (when 16TCNT changes from the matching value to the next value). When the compare match signal is generated, the output value selected in TIOR is output at the output compare pin (TIOCA or TIOCB). When 16TCNT matches a general register, the compare match signal is not generated until the next counter clock pulse. Figure 8.20 shows the output compare timing. 16TCNT input clock 16TCNT N GR N N+1 Compare match signal TIOCA, TIOCB Figure 8.20 Output Compare Output Timing Input Capture Function: The 16TCNT value can be transferred to a general register when an input edge is detected at an input capture input/output compare pin (TIOCA or TIOCB). Risingedge, falling-edge, or both-edge detection can be selected. The input capture function can be used to measure pulse width or period. 208 * Sample setup procedure for input capture Figure 8.21 shows a sample procedure for setting up input capture. 1. Set TIOR to select the input capture function of a general register and the rising edge, falling edge, or both edges of the input capture signal. Clear the DDR bit to 0 before making these TIOR settings. Input selection Select input-capture input 1 Start counter 2 2. Set the STR bit to 1 in TSTR to start the timer counter. Input capture Figure 8.21 Setup Procedure for Input Capture (Example) * Examples of input capture Figure 8.22 illustrates input capture when the falling edge of TIOCB and both edges of TIOCA are selected as capture edges. 16TCNT is cleared by input capture into GRB. 16TCNT value H'0180 H'0160 H'0005 H'0000 TIOCB TIOCA GRA H'0005 H'0160 GRB H'0180 Figure 8.22 Input Capture (Example) 209 * Input capture signal timing Input capture on the rising edge, falling edge, or both edges can be selected by settings in TIOR. Figure 8.23 shows the timing when the rising edge is selected. The pulse width of the input capture signal must be at least 1.5 system clocks for single-edge capture, and 2.5 system clocks for capture of both edges. Input-capture input Input capture signal 16TCNT N N GRA, GRB Figure 8.23 Input Capture Signal Timing 8.4.3 Synchronization The synchronization function enables two or more timer counters to be synchronized by writing the same data to them simultaneously (synchronous preset). With appropriate 16TCR settings, two or more timer counters can also be cleared simultaneously (synchronous clear). Synchronization enables additional general registers to be associated with a single time base. Synchronization can be selected for all channels (0 to 2). Sample Setup Procedure for Synchronization: Figure 8.24 shows a sample procedure for setting up synchronization. 210 Setup for synchronization Select synchronization 1 Synchronous preset Write to 16TCNT Synchronous clear 2 Clearing synchronized to this channel? No Yes Synchronous preset Select counter clear source 3 Select counter clear source 4 Start counter 5 Start counter 5 Counter clear Synchronous clear 1. Set the SYNC bits to 1 in TSNC for the channels to be synchronized. 2. When a value is written in 16TCNT in one of the synchronized channels, the same value is simultaneously written in 16TCNT in the other channels. 3. Set the CCLR1 or CCLR0 bit in 16TCR to have the counter cleared by compare match or input capture. 4. Set the CCLR1 and CCLR0 bits in 16TCR to have the counter cleared synchronously. 5. Set the STR bits in TSTR to 1 to start the synchronized counters. Figure 8.24 Setup Procedure for Synchronization (Example) Example of Synchronization: Figure 8.25 shows an example of synchronization. Channels 0, 1, and 2 are synchronized, and are set to operate in PWM mode. Channel 0 is set for counter clearing by compare match with GRB0. Channels 1 and 2 are set for synchronous counter clearing. The timer counters in channels 0, 1, and 2 are synchronously preset, and are synchronously cleared by compare match with GRB0. A three-phase PWM waveform is output from pins TIOCA0, TIOCA1, and TIOCA2. For further information on PWM mode, see section 8.4.4, PWM Mode. 211 Value of 16TCNT0 to 16TCNT2 Cleared by compare match with GRB0 GRB0 GRB1 GRA0 GRB2 GRA1 GRA2 H'0000 TIOCA0 TIOCA1 TIOCA2 Figure 8.25 Synchronization (Example) 8.4.4 PWM Mode In PWM mode GRA and GRB are paired and a PWM waveform is output from the TIOCA pin. GRA specifies the time at which the PWM output changes to 1. GRB specifies the time at which the PWM output changes to 0. If either GRA or GRB compare match is selected as the counter clear source, a PWM waveform with a duty cycle from 0% to 100% is output at the TIOCA pin. PWM mode can be selected in all channels (0 to 2). Table 8.4 summarizes the PWM output pins and corresponding registers. If the same value is set in GRA and GRB, the output does not change when compare match occurs. Table 8.4 PWM Output Pins and Registers Channel Output Pin 1 Output 0 Output 0 TIOCA0 GRA0 GRB0 1 TIOCA1 GRA1 GRB1 2 TIOCA2 GRA2 GRB2 212 Sample Setup Procedure for PWM Mode: Figure 8.26 shows a sample procedure for setting up PWM mode. PWM mode Select counter clock Select counter clear source 1 2 1. Set bits TPSC2 to TPSC0 in 16TCR to select the counter clock source. If an external clock source is selected, set bits CKEG1 and CKEG0 in 16TCR to select the desired edge(s) of the external clock signal. 2. Set bits CCLR1 and CCLR0 in 16TCR to select the counter clear source. 3. Set the time at which the PWM waveform should go to 1 in GRA. Set GRA 3 Set GRB 4 Select PWM mode 5 Start counter 6 PWM mode 4. Set the time at which the PWM waveform should go to 0 in GRB. 5. Set the PWM bit in TMDR to select PWM mode. When PWM mode is selected, regardless of the TIOR contents, GRA and GRB become output compare registers specifying the times at which the PWM output goes to 1 and 0. The TIOCA pin automatically becomes the PWM output pin. The TIOCB pin conforms to the settings of bits IOB1 and IOB0 in TIOR. If TIOCB output is not desired, clear both IOB1 and IOB0 to 0. 6. Set the STR bit to 1 in TSTR to start the timer counter. Figure 8.26 Setup Procedure for PWM Mode (Example) 213 Examples of PWM Mode: Figure 8.27 shows examples of operation in PWM mode. In PWM mode TIOCA becomes an output pin. The output goes to 1 at compare match with GRA, and to 0 at compare match with GRB. In the examples shown, 16TCNT is cleared by compare match with GRA or GRB. Synchronized operation and free-running counting are also possible. 16TCNT value Counter cleared by compare match A GRA GRB Time H'0000 TIOCA a. Counter cleared by GRA (TOA = 1) 16TCNT value Counter cleared by compare match B GRB GRA H'0000 Time TIOCA b. Counter cleared by GRB (TOA = 0) Figure 8.27 PWM Mode (Example 1) 214 Figure 8.28 shows examples of the output of PWM waveforms with duty cycles of 0% and 100%. If the counter is cleared by compare match with GRB, and GRA is set to a higher value than GRB, the duty cycle is 0%. If the counter is cleared by compare match with GRA, and GRB is set to a higher value than GRA, the duty cycle is 100%. 16TCNT value Counter cleared by compare match B GRB GRA H'0000 Time TIOCA Write to GRA Write to GRA a. 0% duty cycle (TOA=0) 16TCNT value Counter cleared by compare match A GRA GRB H'0000 Time TIOCA Write to GRB Write to GRB b. 100% duty cycle (TOA=1) Figure 8.28 PWM Mode (Example 2) 215 8.4.5 Phase Counting Mode In phase counting mode the phase difference between two external clock inputs (at the TCLKA and TCLKB pins) is detected, and 16TCNT2 counts up or down accordingly. In phase counting mode, the TCLKA and TCLKB pins automatically function as external clock input pins and 16TCNT2 becomes an up/down-counter, regardless of the settings of bits TPSC2 to TPSC0, CKEG1, and CKEG0 in 16TCR2. Settings of bits CCLR1, CCLR0 in 16TCR2, and settings in TIOR2, TISRA, TISRB, TISRC, setting of STR2 bit in TSTR, GRA2, and GRB2 are valid. The input capture and output compare functions can be used, and interrupts can be generated. Phase counting is available only in channel 2. Sample Setup Procedure for Phase Counting Mode: Figure 8.29 shows a sample procedure for setting up phase counting mode. Phase counting mode Select phase counting mode 1 1. Set the MDF bit in TMDR to 1 to select phase counting mode. 2. Select the flag setting condition with the FDIR bit in TMDR. Select flag setting condition 2 Start counter 3 3. Set the STR2 bit to 1 in TSTR to start the timer counter. Phase counting mode Figure 8.29 Setup Procedure for Phase Counting Mode (Example) 216 Example of Phase Counting Mode: Figure 8.30 shows an example of operations in phase counting mode. Table 8.5 lists the up-counting and down-counting conditions for 16TCNT2. In phase counting mode both the rising and falling edges of TCLKA and TCLKB are counted. The phase difference between TCLKA and TCLKB must be at least 1.5 states, the phase overlap must also be at least 1.5 states, and the pulse width must be at least 2.5 states. 16TCNT2 value Counting up Counting down TCLKB TCLKA Figure 8.30 Operation in Phase Counting Mode (Example) Table 8.5 Up/Down Counting Conditions Counting Direction Up-Counting TCLKB pin High Low HIgh Low TCLKA pin Low High Low HIgh Phase difference Down-Counting Phase difference Pulse width Pulse width TCLKA TCLKB Overlap Overlap Phase difference and overlap: at least 1.5 states Pulse width: at least 2.5 states Figure 8.31 Phase Difference, Overlap, and Pulse Width in Phase Counting Mode 217 8.4.6 16-Bit Timer Output Timing The initial value of 16-bit timer output when a timer count operation begins can be specified arbitrarily by making a setting in TOLR. Figure 8.32 shows the timing for setting the initial value with TOLR. Only write to TOLR when the corresponding bit in TSTR is cleared to 0. T1 T3 T2 Address bus TOLR 16-bit timer output pin TOLR address N N Figure 8.32 Timing for Setting 16-Bit Timer Output Level by Writing to TOLR 218 8.5 Interrupts The 16-bit timer has two types of interrupts: input capture/compare match interrupts, and overflow interrupts. 8.5.1 Setting of Status Flags Timing of Setting of IMFA and IMFB at Compare Match: IMFA and IMFB are set to 1 by a compare match signal generated when 16TCNT matches a general register (GR). The compare match signal is generated in the last state in which the values match (when 16TCNT is updated from the matching count to the next count). Therefore, when 16TCNT matches a general register, the compare match signal is not generated until the next 16TCNT clock input. Figure 8.33 shows the timing of the setting of IMFA and IMFB. 16TCNT input clock 16TCNT GR N N+1 N Compare match signal IMF IMI Figure 8.33 Timing of Setting of IMFA and IMFB by Compare Match 219 Timing of Setting of IMFA and IMFB by Input Capture: IMFA and IMFB are set to 1 by an input capture signal. The 16TCNT contents are simultaneously transferred to the corresponding general register. Figure 8.34 shows the timing. Input capture signal IMF 16TCNT GR N N IMI Figure 8.34 Timing of Setting of IMFA and IMFB by Input Capture 220 Timing of Setting of Overflow Flag (OVF): OVF is set to 1 when 16TCNT overflows from H'FFFF to H'0000 or underflows from H'0000 to H'FFFF. Figure 8.35 shows the timing. 16TCNT Overflow signal OVF OVI Figure 8.35 Timing of Setting of OVF 8.5.2 Timing of Clearing of Status Flags If the CPU reads a status flag while it is set to 1, then writes 0 in the status flag, the status flag is cleared. Figure 8.36 shows the timing. TISR write cycle T1 T2 T3 Address TISR address IMF, OVF Figure 8.36 Timing of Clearing of Status Flags 221 8.5.3 Interrupt Sources Each 16-bit timer channel can generate a compare match/input capture A interrupt, a compare match/input capture B interrupt, and an overflow interrupt. In total there are nine interrupt sources of three kinds, all independently vectored. An interrupt is requested when the interrupt request flag are set to 1. The priority order of the channels can be modified in interrupt priority registers A (IPRA). For details see section 5, Interrupt Controller. Table 8.6 lists the interrupt sources. Table 8.6 16-bit timer Interrupt Sources Interrupt Source Description Priority* 0 IMIA0 IMIB0 OVI0 Compare match/input capture A0 Compare match/input capture B0 Overflow 0 High 1 IMIA1 IMIB1 OVI1 Compare match/input capture A1 Compare match/input capture B1 Overflow 1 2 IMIA2 IMIB2 OVI2 Compare match/input capture A2 Compare match/input capture B2 Overflow 2 Channel Low Note: * The priority immediately after a reset is indicated. Inter-channel priorities can be changed by settings in IPRA. 222 8.6 Usage Notes This section describes contention and other matters requiring special attention during 16-bit timer operations. Contention between 16TCNT Write and Clear: If a counter clear signal occurs in the T3 state of a 16TCNT write cycle, clearing of the counter takes priority and the write is not performed. See figure 8.37. 16TCNT write cycle T2 T1 T3 Address bus 16TCNT address Internal write signal Counter clear signal 16TCNT N H'0000 Figure 8.37 Contention between 16TCNT Write and Clear 223 Contention between 16TCNT Word Write and Increment: If an increment pulse occurs in the T3 state of a 16TCNT word write cycle, writing takes priority and 16TCNT is not incremented. Figure 8.38 shows the timing in this case. 16TCNT word write cycle T1 T2 T3 Address bus 16TCNT address Internal write signal 16TCNT input clock 16TCNT N M 16TCNT write data Figure 8.38 Contention between 16TCNT Word Write and Increment 224 Contention between 16TCNT Byte Write and Increment: If an increment pulse occurs in the T2 or T3 state of a 16TCNT byte write cycle, writing takes priority and 16TCNT is not incremented. The byte data for which a write was not performed is not incremented, and retains its pre-write value. See figure 8.39, which shows an increment pulse occurring in the T2 state of a byte write to 16TCNTH. 16TCNTH byte write cycle T1 T2 T3 16TCNTH address Address bus Internal write signal 16TCNT input clock 16TCNTH N M 16TCNT write data 16TCNTL X X+1 X Figure 8.39 Contention between 16TCNT Byte Write and Increment 225 Contention between General Register Write and Compare Match: If a compare match occurs in the T3 state of a general register write cycle, writing takes priority and the compare match signal is inhibited. See figure 8.40. General register write cycle T2 T1 T3 GR address Address bus Internal write signal 16TCNT N GR N N+1 M General register write data Compare match signal Inhibited Figure 8.40 Contention between General Register Write and Compare Match 226 Contention between 16TCNT Write and Overflow or Underflow: If an overflow occurs in the T3 state of a 16TCNT write cycle, writing takes priority and the counter is not incremented. OVF is set to 1.The same holds for underflow. See figure 8.41. 16TCNT write cycle T1 T2 T3 Address bus 16TCNT address Internal write signal 16TCNT input clock Overflow signal 16TCNT H'FFFF M 16TCNT write data OVF Figure 8.41 Contention between 16TCNT Write and Overflow 227 Contention between General Register Read and Input Capture: If an input capture signal occurs during the T3 state of a general register read cycle, the value before input capture is read. See figure 8.42. General register read cycle T1 T2 T3 GR address Address bus Internal read signal Input capture signal GR Internal data bus X M X Figure 8.42 Contention between General Register Read and Input Capture 228 Contention between Counter Clearing by Input Capture and Counter Increment: If an input capture signal and counter increment signal occur simultaneously, the counter is cleared according to the input capture signal. The counter is not incremented by the increment signal. The value before the counter is cleared is transferred to the general register. See figure 8.43. Input capture signal Counter clear signal 16TCNT input clock 16TCNT GR N H'0000 N Figure 8.43 Contention between Counter Clearing by Input Capture and Counter Increment 229 Contention between General Register Write and Input Capture: If an input capture signal occurs in the T3 state of a general register write cycle, input capture takes priority and the write to the general register is not performed. See figure 8.44. General register write cycle T1 T2 T3 Address bus GR address Internal write signal Input capture signal 16TCNT GR M M Figure 8.44 Contention between General Register Write and Input Capture 230 Note on Waveform Period Setting: When a counter is cleared by compare match, the counter is cleared in the last state at which the 16TCNT value matches the general register value, at the time when this value would normally be updated to the next count. The actual counter frequency is therefore given by the following formula: f= (N+1) (f: counter frequency. : system clock frequency. N: value set in general register.) Note on Writes in Synchronized Operation: When channels are synchronized, if a 16TCNT value is modified by byte write access, all 16 bits of all synchronized counters assume the same value as the counter that was addressed. (Example) When channels 1 and 2 are synchronized * Byte write to channel 1 or byte write to channel 2 16TCNT1 W X 16TCNT2 Y Z Upper byte Lower byte Write A to upper byte of channel 1 16TCNT1 A X 16TCNT2 A X Upper byte Lower byte Write A to lower byte of channel 2 16TCNT1 Y A 16TCNT2 Y A Upper byte Lower byte * Word write to channel 1 or word write to channel 2 16TCNT1 W X 16TCNT2 Y Z Upper byte Lower byte Write AB word to channel 1 or 2 16TCNT1 A B 16TCNT2 A B Upper byte Lower byte 231 16-bit timer Operating Modes Table 8.7 (a) 16-bit timer Operating Modes (Channel 0) Register Settings TSNC TMDR Operating Mode Synchronization Synchronous preset SYNC0 = 1 -- MDF FDIR PWM TIOR0 IOA IOB 16TCR0 Clear Select -- PWM mode -- -- PWM0 = 1 -- Output compare A -- -- PWM0 = 0 IOA2 = 0 Other bits unrestricted Output compare B -- -- Input capture A -- -- PWM0 = 0 Input capture B -- -- PWM0 = 0 Counter By compare clearing match/input capture A -- -- CCLR1 = 0 CCLR0 = 1 By compare match/input capture B -- -- CCLR1 = 1 CCLR0 = 0 SYNC0 = 1 -- -- CCLR1 = 1 CCLR0 = 1 Synchronous clear Legend: Clock Select * IOB2 = 0 Other bits unrestricted IOA2 = 1 Other bits unrestricted IOB2 = 1 Other bits unrestricted Setting available (valid). -- Setting does not affect this mode. Note: * The input capture function cannot be used in PWM mode. If compare match A and compare match B occur simultaneously, the compare match signal is inhibited. 232 Table 8.7 (b) 16-bit timer Operating Modes (Channel 1) Register Settings TSNC Operating Mode Synchronization Synchronous preset TMDR MDF FDIR PWM TIOR1 IOA IOB 16TCR1 Clear Select SYNC1 = 1 -- -- PWM mode -- -- PWM1 = 1 -- Output compare A -- -- PWM1 = 0 IOA2 = 0 Other bits unrestricted Output compare B -- -- Input capture A -- -- PWM1 = 0 Input capture B -- -- PWM1 = 0 Counter By compare clearing match/input capture A -- -- CCLR1 = 0 CCLR0 = 1 By compare match/input capture B -- -- CCLR1 = 1 CCLR0 = 0 SYNC1 = 1 -- -- CCLR1 = 1 CCLR0 = 1 Synchronous clear Clock Select * IOB2 = 0 Other bits unrestricted IOA2 = 1 Other bits unrestricted IOB2 = 1 Other bits unrestricted Legend: Setting available (valid). -- Setting does not affect this mode. Note: * The input capture function cannot be used in PWM mode. If compare match A and compare match B occur simultaneously, the compare match signal is inhibited. 233 Table 8.7 (c) 16-bit timer Operating Modes (Channel 2) Register Settings TSNC Operating Mode Synchronization Synchronous preset SYNC2 = 1 TMDR MDF FDIR PWM TIOR2 IOA IOB 16TCR2 Clear Select -- PWM mode -- PWM2 = 1 -- Output compare A -- PWM2 = 0 IOA2 = 0 Other bits unrestricted Output compare B -- Input capture A -- PWM2 = 0 Input capture B -- PWM2 = 0 Counter By compare clearing match/input capture A -- CCLR1 = 0 CCLR0 = 1 By compare match/input capture B -- CCLR1 = 1 CCLR0 = 0 -- CCLR1 = 1 CCLR0 = 1 Synchronous clear Phase counting mode Clock Select SYNC2 = 1 MDF = 1 * IOB2 = 0 Other bits unrestricted IOA2 = 1 Other bits unrestricted IOB2 = 1 Other bits unrestricted -- Legend: Setting available (valid). -- Setting does not affect this mode. Note: * The input capture function cannot be used in PWM mode. If compare match A and compare match B occur simultaneously, the compare match signal is inhibited. 234 Section 9 8-Bit Timers 9.1 Overview The H8/3008 has a built-in 8-bit timer module with four channels (TMR0, TMR1, TMR2, and TMR3), based on 8-bit counters. Each channel has an 8-bit timer counter (8TCNT) and two 8-bit time constant registers (TCORA and TCORB) that are constantly compared with the 8TCNT value to detect compare match events. The timers can be used as multifunctional timers in a variety of applications, including the generation of a rectangular-wave output with an arbitrary duty cycle. 9.1.1 Features The features of the 8-bit timer module are listed below. * Selection of four clock sources The counters can be driven by one of three internal clock signals (/8, /64, or /8192) or an external clock input (enabling use as an external event counter). * Selection of three ways to clear the counters The counters can be cleared on compare match A or B, or input capture B. * Timer output controlled by two compare match signals The timer output signal in each channel is controlled by two independent compare match signals, enabling the timer to generate output waveforms with an arbitrary duty cycle or PWM output. * A/D converter can be activated by a compare match * Two channels can be cascaded Channels 0 and 1 can be operated as the upper and lower halves of a 16-bit timer (16-bit count mode). Channels 2 and 3 can be operated as the upper and lower halves of a 16-bit timer (16-bit count mode). Channel 1 can count channel 0 compare match events (compare match count mode). Channel 3 can count channel 2 compare match events (compare match count mode). * Input capture function can be set 8-bit or 16-bit input capture operation is available. 235 * Twelve interrupt sources There are twelve interrupt sources: four compare match sources, four compare match/input capture sources, four overflow sources. Two of the compare match sources and two of the combined compare match/input capture sources each have an independent interrupt vector. The remaining compare match interrupts, combined compare match/input capture interrupts, and overflow interrupts have one interrupt vector for two sources. 236 9.1.2 Block Diagram The 8-bit timers are divided into two groups of two channels each: group 0 comprising channels 0 and 1, and group 1 comprising channels 2 and 3. Figure 9.1 shows a block diagram of 8-bit timer group 0. External clock sources TCLKA TCLKC Internal clock sources /8 /64 /8192 Clock 1 Clock 0 Clock select TCORA0 TCORA1 Compare match A1 Compare match A0 Comparator A0 Comparator A1 Overflow 1 TMO0 TMIO1 8TCNT0 8TCNT1 Internal bus Overflow 0 Compare match B1 Control logic Compare match B0 Comparator B0 Input capture B1 Legend: TCORA: TCORB: 8TCNT: 8TCSR: 8TCR: Comparator B1 TCORB0 TCORB1 8TCSR0 8TCSR1 8TCR0 8TCR1 CMIA0 CMIB0 CMIA1/CMIB1 OVI0/OVI1 Interrupt signals Time constant register A Time constant register B Timer counter Timer control/status register Timer control register Figure 9.1 Block Diagram of 8-Bit Timer Unit (Two Channels: Group 0) 237 9.1.3 Pin Configuration Table 9.1 summarizes the input/output pins of the 8-bit timer module. Table 9.1 8-Bit Timer Pins Group Channel Name Abbreviation I/O 0 0 Timer output TMO0 Output Compare match output Timer clock input TCLKC Input Counter external clock input Timer input/output TMIO1 I/O Compare match output/input capture input Timer clock input TCLKA Input Counter external clock input Timer output TMO2 Output Compare match output Timer clock input TCLKD Input Counter external clock input Timer input/output TMIO3 I/O Compare match output/input capture input Timer clock input Input Counter external clock input 1 1 2 3 238 TCLKB Function 9.1.4 Register Configuration Table 9.2 summarizes the registers of the 8-bit timer module. Table 9.2 8-Bit Timer Registers Channel Address* 1 Name Abbreviation R/W 0 Timer control register 0 8TCR0 1 2 3 H'FFF80 Initial value R/W H'00 2 H'FFF82 Timer control/status register 0 8TCSR0 R/(W)* H'00 H'FFF84 Time constant register A0 TCORA0 R/W H'FF H'FFF86 Time constant register B0 TCORB0 R/W H'FF H'FFF88 Timer counter 0 8TCNT0 R/W H'00 H'FFF81 Timer control register 1 8TCR1 R/W H'00 2 H'FFF83 Timer control/status register 1 8TCSR1 R/(W)* H'00 H'FFF85 Time constant register A1 TCORA1 R/W H'FF H'FFF87 Time constant register B1 TCORB1 R/W H'FF H'FFF89 Timer counter 1 8TCNT1 R/W H'00 H'FFF90 Timer control register 2 8TCR2 R/W H'00 2 H'FFF92 Timer control/status register 2 8TCSR2 R/(W)* H'10 H'FFF94 Time constant register A2 TCORA2 R/W H'FF H'FFF96 Time constant register B2 TCORB2 R/W H'FF H'FFF98 Timer counter 2 8TCNT2 R/W H'00 H'FFF91 Timer control register 3 8TCR3 R/W H'00 2 H'FFF93 Timer control/status register 3 8TCSR3 R/(W)* H'00 H'FFF95 Time constant register A3 TCORA3 R/W H'FF H'FFF97 Time constant register B3 TCORB3 R/W H'FF H'FFF99 Timer counter 3 8TCNT3 R/W H'00 Notes: *1 Indicates the lower 20 bits of the address in advanced mode. *2 Only 0 can be written to bits 7 to 5, to clear these flags. Each pair of registers for channel 0 and channel 1 comprises a 16-bit register with the channel 0 register as the upper 8 bits and the channel 1 register as the lower 8 bits, so they can be accessed together by word access. Similarly, each pair of registers for channel 2 and channel 3 comprises a 16-bit register with the channel 2 register as the upper 8 bits and the channel 3 register as the lower 8 bits, so they can be accessed together by word access. 239 9.2 Register Descriptions 9.2.1 Timer Counters (8TCNT) 8TCNT0 8TCNT1 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Initial value 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 8TCNT2 8TCNT3 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Initial value 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W The timer counters (8TCNT) are 8-bit readable/writable up-counters that increment on pulses generated from an internal or external clock source. The clock source is selected by clock select bits 2 to 0 (CKS2 to CKS0) in the timer control register (8TCR). The CPU can always read or write to the timer counters. The 8TCNT0 and 8TCNT1 pair, and the 8TCNT2 and 8TCNT3 pair, can each be accessed as a 16-bit register by word access. 8TCNT can be cleared by an input capture signal or compare match signal. Counter clear bits 1 and 0 (CCLR1 and CCLR0) in 8TCR select the method of clearing. When 8TCNT overflows from H'FF to H'00, the overflow flag (OVF) in the timer control/status register (8TCSR) is set to 1. Each 8TCNT is initialized to H'00 by a reset and in standby mode. 240 9.2.2 Time Constant Registers A (TCORA) TCORA0 to TCORA3 are 8-bit readable/writable registers. TCORA0 TCORA1 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Initial value 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W TCORA2 TCORA3 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Initial value 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W The TCORA0 and TCORA1 pair, and the TCORA2 and TCORA3 pair, can each be accessed as a 16-bit register by word access. The TCORA value is constantly compared with the 8TCNT value. When a match is detected, the corresponding compare match flag A (CMFA) is set to 1 in 8TCSR. The timer output can be freely controlled by these compare match signals and the settings of output select bits 1 and 0 (OS1, OS0) in 8TCSR. Each TCORA register is initialized to H'FF by a reset and in standby mode. 241 9.2.3 Time Constant Registers B (TCORB) TCORB0 TCORB1 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Initial value 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W TCORB2 TCORB3 Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Initial value 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W TCORB0 to TCORB3 are 8-bit readable/writable registers. The TCORB0 and TCORB1 pair, and the TCORB2 and TCORB3 pair, can each be accessed as a 16-bit register by word access. The TCORB value is constantly compared with the 8TCNT value. When a match is detected, the corresponding compare match flag B (CMFB) is set to 1 in 8TCSR*. The timer output can be freely controlled by these compare match signals and the settings of output/input capture edge select bits 3 and 2 (OIS3, OIS2) in 8TCSR. When TCORB is used for input capture, it stores the 8TCNT value on detection of an external input capture signal. At this time, the CMFB flag is set to 1 in the corresponding 8TCSR register. The detected edge of the input capture signal is set in 8TCSR. Each TCORB register is initialized to H'FF by a reset and in standby mode. Note: * When channel 1 and channel 3 are designated for TCORB input capture, the CMFB flag is not set by a channel 0 or channel 2 compare match B. 242 9.2.4 Timer Control Register (8TCR) Bit 7 6 5 4 3 2 1 0 CMIEB CMIEA OVIE CCLR1 CCLR0 CKS2 CKS1 CKS0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W 8TCR is an 8-bit readable/writable register that selects the 8TCNT input clock, gives the 8TCNT clearing specification, and enables interrupt requests. 8TCR is initialized to H'00 by a reset and in standby mode. For the timing, see section 9.4, Operation. Bit 7--Compare Match Interrupt Enable B (CMIEB): Enables or disables the CMIB interrupt request when the CMFB flag is set to 1 in 8TCSR. Bit 7 CMIEB Description 0 CMIB interrupt requested by CMFB is disabled 1 CMIB interrupt requested by CMFB is enabled (Initial value) Bit 6--Compare Match Interrupt Enable A (CMIEA): Enables or disables the CMIA interrupt request when the CMFA flag is set to 1 in 8TCSR. Bit 6 CMIEA Description 0 CMIA interrupt requested by CMFA is disabled 1 CMIA interrupt requested by CMFA is enabled (Initial value) Bit 5--Timer Overflow Interrupt Enable (OVIE): Enables or disables the OVI interrupt request when the OVF flag is set to 1 in 8TCSR. Bit 5 OVIE Description 0 OVI interrupt requested by OVF is disabled 1 OVI interrupt requested by OVF is enabled (Initial value) 243 Bits 4 and 3--Counter Clear 1 and 0 (CCLR1, CCLR0): These bits specify the 8TCNT clearing source. Compare match A or B, or input capture B, can be selected as the clearing source. Bit 4 CCLR1 Bit 3 CCLR0 Description 0 0 Clearing is disabled 1 Cleared by compare match A 0 Cleared by compare match B/input capture B 1 Cleared by input capture B 1 (Initial value) Note: When input capture B is set as the 8TCNT1 and 8TCNT3 counter clear source, 8TCNT0 and 8TCNT2 are not cleared by compare match B. Bits 2 to 0--Clock Select 2 to 0 (CSK2 to CSK0): These bits select whether the clock input to 8TCNT is an internal or external clock. Three internal clocks can be selected, all divided from the system clock (): /8, /64, and /8192. The rising edge of the selected internal clock triggers the count. When use of an external clock is selected, three types of count can be selected: at the rising edge, the falling edge, and both rising and falling edges. When CKS2, CKS1, CKS0 = 1, 0, 0, channels 0 and 1 and channels 2 and 3 are cascaded. The incrementing clock source is different when 8TCR0 and 8TCR2 are set, and when 8TCR1 and 8TCR3 are set. 244 Bit 2 CSK2 Bit 1 CSK1 Bit 0 CSK0 Description 0 0 0 Clock input disabled 1 Internal clock, counted on falling edge of /8 0 Internal clock, counted on falling edge of /64 1 Internal clock, counted on falling edge of /8192 0 Channel 0 (16-bit count mode): Count on 8TCNT1 overflow signal*1 1 1 0 (Initial value) Channel 1 (compare match count mode): Count on 8TCNT0 compare match A*1 Channel 2 (16-bit count mode): Count on 8TCNT3 overflow signal*2 Channel 3 (compare match count mode): Count on 8TCNT2 compare match A*2 1 1 External clock, counted on rising edge 0 External clock, counted on falling edge 1 External clock, counted on both rising and falling edges Notes: *1 If the clock input of channel 0 is the 8TCNT1 overflow signal and that of channel 1 is the 8TCNT0 compare match signal, no incrementing clock is generated. Do not use this setting. *2 If the clock input of channel 2 is the 8TCNT3 overflow signal and that of channel 3 is the 8TCNT2 compare match signal, no incrementing clock is generated. Do not use this setting. 245 9.2.5 Timer Control/Status Registers (8TCSR) 8TCSR0 Bit 7 6 5 4 3 2 1 0 CMFB CMFA OVF ADTE OIS3 OIS2 OS1 OS0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/(W)* R/(W)* R/(W)* R/W R/W R/W R/W R/W 7 6 5 4 3 2 1 0 CMFB CMFA OVF -- OIS3 OIS2 OS1 OS0 8TCSR2 Bit Initial value 0 0 0 1 0 0 0 0 Read/Write R/(W)* R/(W)* R/(W)* -- R/W R/W R/W R/W 8TCSR1, 8TCSR3 7 Bit 6 5 4 3 2 1 0 CMFB CMFA OVF ICE OIS3 OIS2 OS1 OS0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/(W)* R/(W)* R/(W)* R/W R/W R/W R/W R/W Note: * Only 0 can be written to bits 7 to 5, to clear these flags. The timer control/status registers 8TCSR are 8-bit registers that indicate compare match/input capture and overflow statuses, and control compare match output/input capture edge selection. 8TCSR2 is initialized to H'10, and 8TCSR0, 8TCSR1, and 8TCSR3 to H'00, by a reset and in standby mode. 246 Bit 7--Compare Match/Input Capture Flag B (CMFB): Status flag that indicates the occurrence of a TCORB compare match or input capture. Bit 7 CMFB Description 0 [Clearing condition] Read CMFB when CMFB = 1, then write 0 in CMFB (Initial value) 1 [Setting conditions] * 8TCNT = TCORB* * The 8TCNT value is transferred to TCORB by an input capture signal when TCORB functions as an input capture register Note: * When bit ICE is set to 1 in 8TCSR1 and 8TCSR3, the CMFB flag is not set when 8TCNT0 = TCORB0 or 8TCNT2 = TCORB2. Bit 6--Compare Match Flag A (CMFA): Status flag that indicates the occurrence of a TCORA compare match. Bit 6 CMFA Description 0 [Clearing condition] Read CMFA when CMFA = 1, then write 0 in CMFA 1 [Setting condition] 8TCNT = TCORA (Initial value) Bit 5--Timer Overflow Flag (OVF): Status flag that indicates that the 8TCNT has overflowed from H'FF to H'00. Bit 5 OVF Description 0 [Clearing condition] Read OVF when OVF = 1, then write 0 in OVF 1 [Setting condition] 8TCNT overflows from H'FF to H'00 (Initial value) 247 Bit 4--A/D Trigger Enable (ADTE) (In 8TCSR0): In combination with TRGE in the A/D control register (ADCR), enables or disables A/D converter start requests by compare match A or an external trigger. TRGE* Bit 4 ADTE 0 0 A/D converter start requests by compare match A or external trigger pin (ADTRG) input are disabled (Initial value) 1 A/D converter start requests by compare match A or external trigger pin (ADTRG) input are disabled 0 A/D converter start requests by external trigger pin (ADTRG) input are enabled, and A/D converter start requests by compare match A are disabled 1 A/D converter start requests by compare match A are enabled, and A/D converter start requests by external trigger pin (ADTRG) input are disabled 1 Description Note: * TRGE is bit 7 of the A/D control register (ADCR). Bit 4--Reserved (In 8TCSR1): This bit is a reserved bit, but can be read and written. Bit 4--Input Capture Enable (ICE) (In 8TCSR1 and 8TCSR3): Selects the function of TCORB1 and TCORB3. Bit 4 ICE Description 0 TCORB1 and TCORB3 are compare match registers 1 TCORB1 and TCORB3 are input capture registers (Initial value) When bit ICE is set to 1 in 8TCSR1 or 8TCSR3, the operation of the TCORA and TCORB registers in channels 0 to 3 is as shown in the tables below. 248 Table 9.3 Operation of Channels 0 and 1 when Bit ICE is Set to 1 in 8TCSR1 Register Register Register Function Status Flag Change Timer Output Capture Input Interrupt Request TCORA0 Compare match CMFA changed from 0 TMO0 output controllable operation to 1 in 8TCSR0 by compare match CMIA0 interrupt request generated by compare match TCORB0 Compare match CMFB not changed No output from operation from 0 to 1 in 8TCSR0 TMO0 by compare match CMIB0 interrupt request not generated by compare match TCORA1 Compare match CMFA changed from 0 TMIO1 is dedicated CMIA1 interrupt request operation to 1 in 8TCSR1 by input capture pin generated by compare compare match match TCORB1 Input capture operation Table 9.4 CMFB changed from 0 TMIO1 is dedicated CMIB1 interrupt request to 1 in 8TCSR1 by input capture pin generated by input input capture capture Operation of Channels 2 and 3 when Bit ICE is Set to 1 in 8TCSR3 Register Register Register Function Status Flag Change Timer Output Capture Input Interrupt Request TCORA2 Compare match CMFA changed from 0 TMO2 output controllable operation to 1 in 8TCSR2 by compare match CMIA2 interrupt request generated by compare match TCORB2 Compare match CMFB not changed No output from operation from 0 to 1 in 8TCSR2 TMO2 by compare match CMIB2 interrupt request not generated by compare match TCORA3 Compare match CMFA changed from 0 TMIO3 is dedicated CMIA3 interrupt request operation to 1 in 8TCSR3 by input capture pin generated by compare compare match match TCORB3 Input capture operation CMFB changed from 0 TMIO3 is dedicated CMIB3 interrupt request to 1 in 8TCSR3 by input capture pin generated by input input capture capture 249 Bits 3 and 2--Output/Input Capture Edge Select B3 and B2 (OIS3, OIS2): In combination with the ICE bit in 8TCSR1 (8TCSR3), these bits select the compare match B output level or the input capture input detected edge. The function of TCORB1 (TCORB3) depends on the setting of bit 4 of 8TCSR1 (8TCSR3). ICE Bit in 8TCSR1 Bit 3 Bit 2 (8TCSR3) OIS3 OIS2 Description 0 0 1 1 0 1 0 No change when compare match B occurs (Initial value) 1 0 is output when compare match B occurs 0 1 is output when compare match B occurs 1 Output is inverted when compare match B occurs (toggle output) 0 TCORB input capture on rising edge 1 TCORB input capture on falling edge 0 TCORB input capture on both rising and falling edges 1 * When the compare match register function is used, the timer output priority order is: toggle output > 1 output > 0 output. * If compare match A and B occur simultaneously, the output changes in accordance with the higher-priority compare match. * When bits OIS3, OIS2, OS1, and OS0 are all cleared to 0, timer output is disabled. Bits 1 and 0--Output Select A1 and A0 (OS1, OS0): These bits select the compare match A output level. Bit 1 OS1 Bit 0 OS0 Description 0 0 No change when compare match A occurs 1 0 is output when compare match A occurs 0 1 is output when compare match A occurs 1 Output is inverted when compare match A occurs (toggle output) 1 (Initial value) * When the compare match register function is used, the timer output priority order is: toggle output > 1 output > 0 output. * If compare match A and B occur simultaneously, the output changes in accordance with the higher-priority compare match. * When bits OIS3, OIS2, OS1, and OS0 are all cleared to 0, timer output is disabled. 250 9.3 CPU Interface 9.3.1 8-Bit Registers 8TCNT, TCORA, TCORB, 8TCR, and 8TCSR are 8-bit registers. These registers are connected to the CPU by an internal 16-bit data bus and can be read and written a word at a time or a byte at a time. Figures 9.2 and 9.3 show the operation in word read and write accesses to 8TCNT. Figures 9.4 to 9.7 show the operation in byte read and write accesses to 8TCNT0 and 8TCNT1. Internal data bus H C P U H Bus interface L L Module data bus 8TCNT0 8TCNT1 Figure 9.2 8TCNT Access Operation (CPU Writes to 8TCNT, Word) Internal data bus H C P U H Bus interface L L Module data bus 8TCNT0 8TCNT1 Figure 9.3 8TCNT Access Operation (CPU Reads 8TCNT, Word) Internal data bus H C P U L H Bus interface L Module data bus 8TCNTH0 8TCNTL1 Figure 9.4 8TCNT0 Access Operation (CPU Writes to 8TCNT0, Upper Byte) 251 Internal data bus H C P U L H Bus interface L Module data bus 8TCNTH0 8TCNTL1 Figure 9.5 8TCNT1 Access Operation (CPU Writes to 8TCNT1, Lower Byte) Internal data bus H C P U L H Bus interface L Module data bus 8TCNT0 8TCNT1 Figure 9.6 8TCNT0 Access Operation (CPU Reads 8TCNT0, Upper Byte) Internal data bus H C P U L H Bus interface L Module data bus 8TCNT0 8TCNT1 Figure 9.7 8TCNT1 Access Operation (CPU Reads 8TCNT1, Lower Byte) 252 9.4 Operation 9.4.1 8TCNT Count Timing 8TCNT is incremented by input clock pulses (either internal or external). Internal Clock: Three different internal clock signals (/8, /64, or /8192) divided from the system clock () can be selected, by setting bits CKS2 to CKS0 in 8TCR. Figure 9.8 shows the count timing. Internal clock 8TCNT input clock 8TCNT N-1 N N+1 Note: Even if the same internal clock is selected for the 16-bit timer and the 8-bit timer, the same operation will not be performed since the incrementing edge is different in each case. Figure 9.8 Count Timing for Internal Clock Input External Clock: Three incrementation methods can be selected by setting bits CKS2 to CKS0 in 8TCR: on the rising edge, the falling edge, and both rising and falling edges. The pulse width of the external clock signal must be at least 1.5 system clocks when a single edge is selected, and at least 2.5 system clocks when both edges are selected. Shorter pulses will not be counted correctly. Figure 9.9 shows the timing for incrementation on both edges of the external clock signal. 253 External clock input 8TCNT input clock 8TCNT N-1 N N+1 Figure 9.9 Count Timing for External Clock Input (Both-Edge Detection) 9.4.2 Compare Match Timing Timer Output Timing: When compare match A or B occurs, the timer output is as specified by the OIS3, OIS2, OS1, and OS0 bits in 8TCSR (unchanged, 0 output, 1 output, or toggle output). Figure 9.10 shows the timing when the output is set to toggle on compare match A. Compare match A signal Timer output Figure 9.10 Timing of Timer Output 254 Clear by Compare Match: Depending on the setting of the CCLR1 and CCLR0 bits in 8TCR, 8TCNT can be cleared when compare match A or B occurs, Figure 9.11 shows the timing of this operation. Compare match signal 8TCNT N H'00 Figure 9.11 Timing of Clear by Compare Match Clear by Input Capture: Depending on the setting of the CCLR1 and CCLR0 bits in 8TCR, 8TCNT can be cleared when input capture B occurs. Figure 9.12 shows the timing of this operation. Input capture input Input capture signal 8TCNT N H '00 Figure 9.12 Timing of Clear by Input Capture 9.4.3 Input Capture Signal Timing Input capture on the rising edge, falling edge, or both edges can be selected by settings in 8TCSR. Figure 9.13 shows the timing when the rising edge is selected. The pulse width of the input capture input signal must be at least 1.5 system clocks when a single edge is selected, and at least 2.5 system clocks when both edges are selected. 255 Input capture input Input capture signal 8TCNT N TCORB N Figure 9.13 Timing of Input Capture Input Signal 9.4.4 Timing of Status Flag Setting Timing of CMFA/CMFB Flag Setting when Compare Match Occurs: The CMFA and CMFB flags in 8TCSR are set to 1 by the compare match signal output when the TCORA or TCORB and 8TCNT values match. The compare match signal is generated in the last state of the match (when the matched 8TCNT count value is updated). Therefore, after the 8TCNT and TCORA or TCORB values match, the compare match signal is not generated until an incrementing clock pulse signal is generated. Figure 9.14 shows the timing in this case. 8TCNT N TCOR N N+1 Compare match signal CMF Figure 9.14 CMF Flag Setting Timing when Compare Match Occurs Timing of CMFB Flag Setting when Input Capture Occurs: On generation of an input capture signal, the CMFB flag is set to 1 and at the same time the 8TCNT value is transferred to TCORB. Figure 9.15 shows the timing in this case. 256 8TCNT N TCORB N Input capture signal CMFB Figure 9.15 CMFB Flag Setting Timing when Input Capture Occurs Timing of Overflow Flag (OVF) Setting: The OVF flag in 8TCSR is set to 1 by the overflow signal generated when 8TCNT overflows (from H'FF to H'00). Figure 9.16 shows the timing in this case. 8TCNT H'FF H'00 Overflow signal OVF Figure 9.16 Timing of OVF Setting 9.4.5 Operation with Cascaded Connection If bits CKS2 to CKS0 are set to (100) in either 8TCR0 or 8TCR1, the 8-bit timers of channels 0 and 1 are cascaded. With this configuration, the two timers can be used as a single 16-bit timer (16-bit timer mode), or channel 0 8-bit timer compare matches can be counted in channel 1 (compare match count mode). Similarly, if bits CKS2 to CKS0 are set to (100) in either 8TCR2 or 8TCR3, the 8-bit timers of channels 2 and 3 are cascaded. With this configuration, the two timers can be used as a single 16-bit timer (16-bit timer mode),or channel 2 8-bit timer compare matches can be counted in channel 3 (compare match count mode). In this case, the timer operates as below. 257 16-Bit Count Mode * Channels 0 and 1: When bits CKS2 to CKS0 are set to (100) in 8TCR0, the timer functions as a single 16-bit timer with channel 0 occupying the upper 8 bits and channel 1 occupying the lower 8 bits. Setting when Compare Match Occurs * The CMFA or CMFB flag is set to 1 in 8TCSR0 when a 16-bit compare match occurs. * The CMFA or CMFB flag is set to 1 in 8TCSR1 when a lower 8-bit compare match occurs. * TMO0 pin output control by bits OIS3, OIS2, OS1, and OS0 in 8TCSR0 is in accordance with the 16-bit compare match conditions. * TMIO 1 pin output control by bits OIS3, OIS2, OS1, and OS0 in 8TCSR1 is in accordance with the lower 8-bit compare match conditions. Setting when Input Capture Occurs * The CMFB flag is set to 1 in 8TCSR0 and 8TCSR1 when the ICE bit is 1 in TCSR1 and input capture occurs. * TMIO 1 pin input capture input signal edge detection is selected by bits OIS3 and OIS2 in 8TCSR0. Counter Clear Specification * If counter clear on compare match or input capture has been selected by the CCLR1 and CCLR0 bits in 8TCR0, the 16-bit counter (both 8TCNT0 and 8TCNT1) is cleared. * The settings of the CCLR1 and CCLR0 bits in 8TCR1 are ignored. The lower 8 bits cannot be cleared independently. OVF Flag Operation * The OVF flag is set to 1 in 8TCSR0 when the 16-bit counter (8TCNT0 and 8TCNT1) overflows (from H'FFFF to H'0000). * The OVF flag is set to 1 in 8TCSR1 when the 8-bit counter (8TCNT1) overflows (from H'FF to H'00). * Channels 2 and 3: When bits CKS2 to CKS0 are set to (100) in 8TCR2, the timer functions as a single 16-bit timer with channel 2 occupying the upper 8 bits and channel 3 occupying the lower 8 bits. Setting when Compare Match Occurs * The CMFA or CMFB flag is set to 1 in 8TCSR2 when a 16-bit compare match occurs. * The CMFA or CMFB flag is set to 1 in 8TCSR3 when a lower 8-bit compare match occurs. * TMO2 pin output control by bits OIS3, OIS2, OS1, and OS0 in 8TCSR2 is in accordance with the 16-bit compare match conditions. * TMIO 3 pin output control by bits OIS3, OIS2, OS1, and OS0 in 8TCSR3 is in accordance with the lower 8-bit compare match conditions. 258 Setting when Input Capture Occurs * The CMFB flag is set to 1 in 8TCSR2 and 8TCSR3 when the ICE bit is 1 in TCSR3 and input capture occurs. * TMIO 3 pin input capture input signal edge detection is selected by bits OIS3 and OIS2 in 8TCSR2. Counter Clear Specification * If counter clear on compare match has been selected by the CCLR1 and CCLR0 bits in 8TCR2, the 16-bit counter (both 8TCNT2 and 8TCNT3) is cleared. * The settings of the CCLR1 and CCLR0 bits in 8TCR3 are ignored. The lower 8 bits cannot be cleared independently. OVF Flag Operation * The OVF flag is set to 1 in 8TCSR2 when the 16-bit counter (8TCNT2 and 8TCNT3) overflows (from H'FFFF to H'0000). * The OVF flag is set to 1 in 8TCSR3 when the 8-bit counter (8TCNT3) overflows (from H'FF to H'00). Compare Match Count Mode * Channels 0 and 1: When bits CKS2 to CKS0 are set to (100) in 8TCR1, 8TCNT1 counts channel 0 compare match A events. CMF flag setting, interrupt generation, TMO pin output, counter clearing, and so on, is in accordance with the settings for each channel. Note: When bit ICE = 1 in 8TCSR1, the compare match register function of TCORB0 in channel 0 cannot be used. * Channels 2 and 3: When bits CKS2 to CKS0 are set to (100) in 8TCR3, 8TCNT3 counts channel 2 compare match A events. CMF flag setting, interrupt generation, TMO pin output, counter clearing, and so on, is in accordance with the settings for each channel. Note: When bit ICE = 1 in 8TCSR3, the compare match register function of TCORB2 in channel 2 cannot be used. Caution Do not set 16-bit counter mode and compare match count mode simultaneously within the same group, as the 8TCNT input clock will not be generated and the counters will not operate. 259 9.4.6 Input Capture Setting The 8TCNT value can be transferred to TCORB on detection of an input edge on the input capture/output compare pin (TMIO1 or TMIO3). Rising edge, falling edge, or both edge detection can be selected. In 16-bit count mode, 16-bit input capture can be used. Setting Input Capture Operation in 8-Bit Timer Mode (Normal Operation) * Channel 1: Set TCORB1 as an 8-bit input capture register with the ICE bit in 8TCSR1. Select rising edge, falling edge, or both edges as the input edge(s) for the input capture signal (TMIO1) with bits OIS3 and OIS2 in 8TCSR1. Select the input clock with bits CKS2 to CKS0 in 8TCR1, and start the 8TCNT count. * Channel 3: Set TCORB3 as an 8-bit input capture register with the ICE bit in 8TCSR3. Select rising edge, falling edge, or both edges as the input edge(s) for the input capture signal (TMIO3) with bits OIS3 and OIS2 in 8TCSR3. Select the input clock with bits CKS2 to CKS0 in 8TCR3, and start the 8TCNT count. Note: When TCORB1 in channel 1 is used for input capture, TCORB0 in channel 0 cannot be used as a compare match register. Similarly, when TCORB3 in channel 3 is used for input capture, TCORB2 in channel 2 cannot be used as a compare match register. Setting Input Capture Operation in 16-Bit Count Mode * Channels 0 and 1: In 16-bit count mode, TCORB0 and TCORB1 function as a 16-bit input capture register when the ICE bit is set to 1 in 8TCSR1. Select rising edge, falling edge, or both edges as the input edge(s) for the input capture signal (TMIO1) with bits OIS3 and OIS2 in 8TCSR0. (In 16-bit count mode, the settings of bits OIS3 and OIS2 in 8TCSR1 are ignored.) Select the input clock with bits CKS2 to CKS0 in 8TCR1, and start the 8TCNT count. * Channels 2 and 3: In 16-bit count mode, TCORB2 and TCORB3 function as a 16-bit input capture register when the ICE bit is set to 1 in 8TCSR3. Select rising edge, falling edge, or both edges as the input edge(s) for the input capture signal (TMIO3) with bits OIS3 and OIS2 in 8TCSR2. (In 16-bit count mode, the settings of bits OIS3 and OIS2 in 8TCSR3 are ignored.) Select the input clock with bits CKS2 to CKS0 in 8TCR3, and start the 8TCNT count. 260 9.5 Interrupt 9.5.1 Interrupt Sources The 8-bit timer unit can generate three types of interrupt: compare match A and B (CMIA and CMIB) and overflow (TOVI). Table 9.5 shows the interrupt sources and their priority order. Each interrupt source is enabled or disabled by the corresponding interrupt enable bit in 8TCR. A separate interrupt request signal is sent to the interrupt controller by each interrupt source. Table 9.5 Types of 8-Bit Timer Interrupt Sources and Priority Order Interrupt Source Description Priority CMIA Interrupt by CMFA High CMIB Interrupt by CMFB TOVI Interrupt by OVF Low For compare match interrupts CMIA1/CMIB1 and CMIA3/CMIB3 and the overflow interrupts (TOVI0/TOVI1 and TOVI2/TOVI3), one vector is shared by two interrupts. Table 9.6 lists the interrupt sources. Table 9.6 8-Bit Timer Interrupt Sources Channel Interrupt Source Description 0 CMIA0 TCORA0 compare match CMIB0 TCORB0 compare match/input capture 1 CMIA1/CMIB1 TCORA1 compare match, or TCORB1 compare match/input capture 0, 1 TOVI0/TOVI1 Counter 0 or counter 1 overflow 2 CMIA2 TCORA2 compare match CMIB2 TCORB2 compare match/input capture 3 CMIA3/CMIB3 TCORA3 compare match, or TCORB3 compare match/input capture 2, 3 TOVI2/TOVI3 Counter 2 or counter 3 overflow 261 9.5.2 A/D Converter Activation The A/D converter can only be activated by channel 0 compare match A. If the ADTE bit setting is 1 when the CMFA flag in 8TCSR0 is set to 1 by generation of channel 0 compare match A, an A/D conversion start request will be issued to the A/D converter. If the TRGE bit in ADCR is 1 at this time, the A/D converter will be started. If the ADTE bit in 8TCSR0 is 1, A/D converter external trigger pin (ADTRG) input is disabled. 9.6 8-Bit Timer Application Example Figure 9.17 shows how the 8-bit timer module can be used to output pulses with any desired duty cycle. The settings for this example are as follows: * Clear the CCLR1 bit to 0 and set the CCLR0 bit to 1 in 8TCR so that 8TCNT is cleared by a TCORA compare match. * Set bits OIS3, OIS2, OS1, and OS0 to (0110) in 8TCSR so that 1 is output on a TCORA compare match and 0 is output on a TCORB compare match. The above settings enable a waveform with the cycle determined by TCORA and the pulse width detected by TCORB to be output without software intervention. 8TCNT H'FF Counter clear TCORA TCORB H'00 TMO Figure 9.17 Example of Pulse Output 262 9.7 Usage Notes Note that the following kinds of contention can occur in 8-bit timer operation. 9.7.1 Contention between 8TCNT Write and Clear If a timer counter clear signal occurs in the T3 state of a 8TCNT write cycle, clearing of the counter takes priority and the write is not performed. Figure 9.18 shows the timing in this case. 8TCNT write cycle T1 T2 T3 Address bus 8TCNT address Internal write signal Counter clear signal 8TCNT N H'00 Figure 9.18 Contention between 8TCNT Write and Clear 263 9.7.2 Contention between 8TCNT Write and Increment If an increment pulse occurs in the T3 state of a 8TCNT write cycle, writing takes priority and 8TCNT is not incremented. Figure 9.19 shows the timing in this case. 8TCNT write cycle T1 T2 T3 Address bus 8 TCNT address Internal write signal 8TCNT input clock 8TCNT N M 8TCNT write data Figure 9.19 Contention between 8TCNT Write and Increment 264 9.7.3 Contention between TCOR Write and Compare Match If a compare match occurs in the T 3 state of a TCOR write cycle, writing takes priority and the compare match signal is inhibited. Figure 9.20 shows the timing in this case. TCOR write cycle T1 T2 T3 Address bus TCOR address Internal write signal 8TCNT N TCOR N N+1 M TCOR write data Compare match signal Inhibited Figure 9.20 Contention between TCOR Write and Compare Match 265 9.7.4 Contention between TCOR Read and Input Capture If an input capture signal occurs in the T3 state of a TCOR read cycle, the value before input capture is read. Figure 9.21 shows the timing in this case. TCORB read cycle T1 T2 T3 Address bus TCORB address Internal read signal Input capture signal TCORB Internal data bus N M N Figure 9.21 Contention between TCOR Read and Input Capture 266 9.7.5 Contention between Counter Clearing by Input Capture and Counter Increment If an input capture signal and counter increment signal occur simultaneously, counter clearing by the input capture signal takes priority and the counter is not incremented. The value before the counter is cleared is transferred to TCORB. Figure 9.22 shows the timing in this case. T1 T2 T3 Input capture signal Counter clear signal 8TCNT internal clock 8TCNT N TCORB X H'00 N Figure 9.22 Contention between Counter Clearing by Input Capture and Counter Increment 267 9.7.6 Contention between TCOR Write and Input Capture If an input capture signal occurs in the T3 state of a TCOR write cycle, input capture takes priority and the write to TCOR is not performed. Figure 9.23 shows the timing in this case. TCOR write cycle T1 T2 T3 Address bus TCOR address Internal write signal Input capture signal M 8TCNT TCOR X M Figure 9.23 Contention between TCOR Write and Input Capture 268 9.7.7 Contention between 8TCNT Byte Write and Increment in 16-Bit Count Mode (Cascaded Connection) If an increment pulse occurs in the T3 state of an 8TCNT byte write cycle in 16-bit count mode, the counter write takes priority and the byte data for which the write was performed is not incremented. The byte data for which a write was not performed is incremented. Figure 9.24 shows the timing when an increment pulse occurs in the T2 state of a byte write to 8TCNT (upper byte). If an increment pulse occurs in the T2 state, on the other hand, the increment takes priority. 8TCNT (upper byte) byte write cycle T1 T2 T3 Address bus 8TCNTH address Internal write signal 8TCNT input clock 8TCNT (upper byte) N 8TCNT (lower byte) X N+1 8TCNT write data X+1 Figure 9.24 Contention between 8TCNT Byte Write and Increment in 16-Bit Count Mode 269 9.7.8 Contention between Compare Matches A and B If compare matches A and B occur at the same time, the 8-bit timer operates according to the relative priority of the output states set for compare match A and compare match B, as shown in Table 9.7. Table 9.7 Timer Output Priority Order Output Setting Priority Toggle output High 1 output 0 output No change 9.7.9 Low 8TCNT Operation and Internal Clock Source Switchover Switching internal clock sources may cause 8TCNT to increment, depending on the switchover timing. Table 9.8 shows the relation between the time of the switchover (by writing to bits CKS1 and CKS0) and the operation of 8TCNT. The 8TCNT input clock is generated from the internal clock source by detecting the rising edge of the internal clock. If a switchover is made from a low clock source to a high clock source, as in case No. 3 in Table 9.8, the switchover will be regarded as a falling edge, a 8TCNT clock pulse will be generated, and 8TCNT will be incremented. 8TCNT may also be incremented when switching between internal and external clocks. 270 Table 9.8 Internal Clock Switchover and 8TCNT Operation No. CKS1 and CKS0 Write Timing 1 High high switchover* 8TCNT Operation 1 Old clock source New clock source 8TCNT clock 8TCNT N N+1 CKS bits rewritten 2 High low switchover*2 Old clock source New clock source 8TCNT clock 8TCNT N N+1 N+2 CKS bits rewritten 3 Low high switchover*3 Old clock source New clock source *4 8TCNT clock 8TCNT N N+1 N+2 CKS bits rewritten 271 No. CKS1 and CKS0 Write Timing 4 Low low switchover* 4 8TCNT Operation Old clock source New clock source 8TCNT clock 8TCNT N N+1 N+2 CKS bits rewritten Notes: *1 Including switchovers from the high level to the halted state, and from the halted state to the high level. *2 Including switchover from the halted state to the low level. *3 Including switchover from the low level to the halted state. *4 The switchover is regarded as a rising edge, causing 8TCNT to increment. 272 Section 10 Programmable Timing Pattern Controller (TPC) 10.1 Overview The H8/3008 has a built-in programmable timing pattern controller (TPC) that provides pulse outputs by using the 16-bit timer as a time base. The TPC pulse outputs are divided into 4-bit groups (group 3 to group 0) that can operate simultaneously and independently. 10.1.1 Features TPC features are listed below. * 16-bit output data Maximum 16-bit data can be output. TPC output can be enabled on a bit-by-bit basis. * Four output groups Output trigger signals can be selected in 4-bit groups to provide up to four different 4-bit outputs. * Selectable output trigger signals * Output trigger signals can be selected for each group from the compare match signals of three 16-bit timer channels. * Non-overlap mode A non-overlap margin can be provided between pulse outputs. 273 10.1.2 Block Diagram Figure 10.1 shows a block diagram of the TPC. 16-bit timer compare match signals Control logic TP15 TP14 TP13 TP12 TP 11 TP10 TP 9 TP 8 TP 7 TP 6 TP 5 TP 4 TP 3 TP 2 TP 1 TP 0 Legend: TPMR: TPCR: NDERB: NDERA: PBDDR: PADDR: NDRB: NDRA: PBDR: PADR: PADDR PBDDR NDERA NDERB TPMR TPCR Internal data bus Pulse output pins, group 3 PBDR NDRB PADR NDRA Pulse output pins, group 2 Pulse output pins, group 1 Pulse output pins, group 0 TPC output mode register TPC output control register Next data enable register B Next data enable register A Port B data direction register Port A data direction register Next data register B Next data register A Port B data register Port A data register Figure 10.1 TPC Block Diagram 274 10.1.3 Pin Configuration Table 10.1 summarizes the TPC output pins. Table 10.1 TPC Pins Name Symbol I/O Function TPC output 0 TP 0 Output Group 0 pulse output TPC output 1 TP 1 Output TPC output 2 TP 2 Output TPC output 3 TP 3 Output TPC output 4 TP 4 Output TPC output 5 TP 5 Output TPC output 6 TP 6 Output TPC output 7 TP 7 Output TPC output 8 TP 8 Output TPC output 9 TP 9 Output TPC output 10 TP 10 Output TPC output 11 TP 11 Output TPC output 12 TP 12 Output TPC output 13 TP 13 Output TPC output 14 TP 14 Output TPC output 15 TP 15 Output Group 1 pulse output Group 2 pulse output Group 3 pulse output 275 10.1.4 Register Configuration Table 10.2 summarizes the TPC registers. Table 10.2 TPC Registers Address* 1 Name Abbreviation R/W H'EE009 Port A data direction register PADDR W H'FFFD9 Port A data register PADR R/(W)* H'EE00A Port B data direction register PBDDR W Initial Value H'00 2 H'00 H'00 2 H'FFFDA Port B data register PBDR R/(W)* H'00 H'FFFA0 TPC output mode register TPMR R/W H'F0 H'FFFA1 TPC output control register TPCR R/W H'FF H'FFFA2 Next data enable register B NDERB R/W H'00 H'FFFA3 Next data enable register A NDERA R/W H'00 H'FFFA5/ H'FFFA7*3 Next data register A NDRA R/W H'00 H'FFFA4/ H'FFFA6*3 Next data register B NDRB R/W H'00 Notes: *1 Lower 20 bits of the address in advanced mode. *2 Bits used for TPC output cannot be written. *3 The NDRA address is H'FFFA5 when the same output trigger is selected for TPC output groups 0 and 1 by settings in TPCR. When the output triggers are different, the NDRA address is H'FFFA7 for group 0 and H'FFFA5 for group 1. Similarly, the address of NDRB is H'FFFA4 when the same output trigger is selected for TPC output groups 2 and 3 by settings in TPCR. When the output triggers are different, the NDRB address is H'FFFA6 for group 2 and H'FFFA4 for group 3. 276 10.2 Register Descriptions 10.2.1 Port A Data Direction Register (PADDR) PADDR is an 8-bit write-only register that selects input or output for each pin in port A. Bit 7 6 5 4 3 2 1 0 PA 7 DDR PA 6 DDR PA 5 DDR PA 4 DDR PA 3 DDR PA 2 DDR PA 1 DDR PA 0 DDR Initial value 0 0 0 0 0 0 0 0 Read/Write W W W W W W W W Port A data direction 7 to 0 These bits select input or output for port A pins Port A is multiplexed with pins TP7 to TP0. Bits corresponding to pins used for TPC output must be set to 1. For further information about PADDR, see section 7.11, Port A. 10.2.2 Port A Data Register (PADR) PADR is an 8-bit readable/writable register that stores TPC output data for groups 0 and 1, when these TPC output groups are used. Bit 7 PA 6 7 PA 5 6 PA 4 5 PA 3 4 PA 2 3 PA 1 2 PA 0 1 PA 0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/(W) * R/(W) * R/(W) * R/(W) * R/(W) * R/(W) * R/(W) * R/(W) * Port A data 7 to 0 These bits store output data for TPC output groups 0 and 1 Note: * Bits selected for TPC output by NDERA settings become read-only bits. For further information about PADR, see section 7.11, Port A. 277 10.2.3 Port B Data Direction Register (PBDDR) PBDDR is an 8-bit write-only register that selects input or output for each pin in port B. Bit 7 6 5 4 3 2 1 0 PB7 DDR PB6 DDR PB5 DDR PB4 DDR PB3 DDR PB2 DDR PB1 DDR PB0 DDR Initial value 0 0 0 0 0 0 0 0 Read/Write W W W W W W W W Port B data direction 7 to 0 These bits select input or output for port B pins Port B is multiplexed with pins TP15 to TP8. Bits corresponding to pins used for TPC output must be set to 1. For further information about PBDDR, see section 7.12, Port B. 10.2.4 Port B Data Register (PBDR) PBDR is an 8-bit readable/writable register that stores TPC output data for groups 2 and 3, when these TPC output groups are used. Bit 7 PB 6 7 PB 5 6 PB 4 5 PB 3 4 PB 2 3 PB 1 2 PB 0 1 PB 0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/(W) * R/(W) * R/(W) * R/(W) * R/(W) * R/(W) * R/(W) * R/(W) * Port B data 7 to 0 These bits store output data for TPC output groups 2 and 3 Note: * Bits selected for TPC output by NDERB settings become read-only bits. For further information about PBDR, see section 7.12, Port B. 278 10.2.5 Next Data Register A (NDRA) NDRA is an 8-bit readable/writable register that stores the next output data for TPC output groups 1 and 0 (pins TP7 to TP0). During TPC output, when an 16-bit timer compare match event specified in TPCR occurs, NDRA contents are transferred to the corresponding bits in PADR. The address of NDRA differs depending on whether TPC output groups 0 and 1 have the same output trigger or different output triggers. NDRA is initialized to H'00 by a reset and in hardware standby mode. It is not initialized in software standby mode. Same Trigger for TPC Output Groups 0 and 1: If TPC output groups 0 and 1 are triggered by the same compare match event, the NDRA address is H'FFFA5. The upper 4 bits belong to group 1 and the lower 4 bits to group 0. Address H'FFFA7 consists entirely of reserved bits that cannot be modified and always read 1. Address H'FFFA5 Bit 7 6 5 4 3 2 1 0 NDR7 NDR6 NDR5 NDR4 NDR3 NDR2 NDR1 NDR0 0 0 0 0 0 0 0 0 R/W R/W Initial value Read/Write R/W R/W R/W R/W R/W Next data 7 to 4 These bits store the next output data for TPC output group 1 R/W Next data 3 to 0 These bits store the next output data for TPC output group 0 Address H'FFFA7 Bit 7 6 5 4 3 2 1 0 -- -- -- -- -- -- -- -- Initial value 1 1 1 1 1 1 1 1 Read/Write -- -- -- -- -- -- -- -- Reserved bits 279 Different Triggers for TPC Output Groups 0 and 1: If TPC output groups 0 and 1 are triggered by different compare match events, the address of the upper 4 bits of NDRA (group 1) is H'FFFA5 and the address of the lower 4 bits (group 0) is H'FFFA7. Bits 3 to 0 of address H'FFFA5 and bits 7 to 4 of address H'FFFA7 are reserved bits that cannot be modified and always read 1. Address H'FFFA5 Bit Initial value Read/Write 7 6 5 4 3 2 1 0 NDR7 NDR6 NDR5 NDR4 -- -- -- -- 0 0 0 0 1 1 1 1 -- -- R/W R/W R/W -- R/W Next data 7 to 4 These bits store the next output data for TPC output group 1 -- Reserved bits Address H'FFFA7 Bit 7 6 5 4 3 2 1 0 NDR0 -- -- -- -- NDR3 NDR2 NDR1 Initial value 1 1 1 1 0 0 0 0 Read/Write -- -- -- -- R/W R/W R/W R/W Reserved bits 280 Next data 3 to 0 These bits store the next output data for TPC output group 0 10.2.6 Next Data Register B (NDRB) NDRB is an 8-bit readable/writable register that stores the next output data for TPC output groups 3 and 2 (pins TP15 to TP8). During TPC output, when an 16-bit timer compare match event specified in TPCR occurs, NDRB contents are transferred to the corresponding bits in PBDR. The address of NDRB differs depending on whether TPC output groups 2 and 3 have the same output trigger or different output triggers. NDRB is initialized to H'00 by a reset and in hardware standby mode. It is not initialized in software standby mode. Same Trigger for TPC Output Groups 2 and 3: If TPC output groups 2 and 3 are triggered by the same compare match event, the NDRB address is H'FFFA4. The upper 4 bits belong to group 3 and the lower 4 bits to group 2. Address H'FFFA6 consists entirely of reserved bits that cannot be modified and always read 1. Address H'FFFA4 Bit 7 6 5 4 3 2 1 0 NDR15 NDR14 NDR13 NDR12 NDR11 NDR10 NDR9 NDR8 0 0 0 0 0 0 0 0 R/W R/W Initial value Read/Write R/W R/W R/W R/W R/W Next data 15 to 12 These bits store the next output data for TPC output group 3 R/W Next data 11 to 8 These bits store the next output data for TPC output group 2 Address H'FFFA6 Bit 7 6 5 4 3 2 1 0 -- -- -- -- -- -- -- -- Initial value 1 1 1 1 1 1 1 1 Read/Write -- -- -- -- -- -- -- -- Reserved bits 281 Different Triggers for TPC Output Groups 2 and 3: If TPC output groups 2 and 3 are triggered by different compare match events, the address of the upper 4 bits of NDRB (group 3) is H'FFFA4 and the address of the lower 4 bits (group 2) is H'FFFA6. Bits 3 to 0 of address H'FFFA4 and bits 7 to 4 of address H'FFFA6 are reserved bits that cannot be modified and always read 1. Address H'FFFA4 Bit 7 6 5 4 3 2 1 0 NDR15 NDR14 NDR13 NDR12 -- -- -- -- 0 0 0 0 1 1 1 1 -- -- Initial value Read/Write R/W R/W R/W -- R/W Next data 15 to 12 These bits store the next output data for TPC output group 3 -- Reserved bits Address H'FFFA6 Bit 7 6 5 4 3 2 1 0 NDR8 -- -- -- -- NDR11 NDR10 NDR9 Initial value 1 1 1 1 0 0 0 0 Read/Write -- -- -- -- R/W R/W R/W R/W Reserved bits 282 Next data 11 to 8 These bits store the next output data for TPC output group 2 10.2.7 Next Data Enable Register A (NDERA) NDERA is an 8-bit readable/writable register that enables or disables TPC output groups 1 and 0 (TP7 to TP0) on a bit-by-bit basis. Bit 7 6 5 4 3 2 1 0 NDER7 NDER6 NDER5 NDER4 NDER3 NDER2 NDER1 NDER0 0 0 0 0 0 0 0 0 R/W R/W Initial value Read/Write R/W R/W R/W R/W R/W R/W Next data enable 7 to 0 These bits enable or disable TPC output groups 1 and 0 If a bit is enabled for TPC output by NDERA, then when the 16-bit timer compare match event selected in the TPC output control register (TPCR) occurs, the NDRA value is automatically transferred to the corresponding PADR bit, updating the output value. If TPC output is disabled, the bit value is not transferred from NDRA to PADR and the output value does not change. NDERA is initialized to H'00 by a reset and in hardware standby mode. It is not initialized in software standby mode. Bits 7 to 0--Next Data Enable 7 to 0 (NDER7 to NDER0): These bits enable or disable TPC output groups 1 and 0 (TP7 to TP0) on a bit-by-bit basis. Bits 7 to 0 NDER7 to NDER0 Description 0 TPC outputs TP7 to TP0 are disabled (NDR7 to NDR0 are not transferred to PA 7 to PA 0) 1 TPC outputs TP7 to TP0 are enabled (NDR7 to NDR0 are transferred to PA 7 to PA 0) (Initial value) 283 10.2.8 Next Data Enable Register B (NDERB) NDERB is an 8-bit readable/writable register that enables or disables TPC output groups 3 and 2 (TP15 to TP8) on a bit-by-bit basis. Bit 7 6 5 4 3 2 1 NDER15 NDER14 NDER13 NDER12 NDER11 NDER10 NDER9 Initial value Read/Write 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 NDER8 0 0 R/W R/W Next data enable 15 to 8 These bits enable or disable TPC output groups 3 and 2 If a bit is enabled for TPC output by NDERB, then when the 16-bit timer compare match event selected in the TPC output control register (TPCR) occurs, the NDRB value is automatically transferred to the corresponding PBDR bit, updating the output value. If TPC output is disabled, the bit value is not transferred from NDRB to PBDR and the output value does not change. NDERB is initialized to H'00 by a reset and in hardware standby mode. It is not initialized in software standby mode. Bits 7 to 0--Next Data Enable 15 to 8 (NDER15 to NDER8): These bits enable or disable TPC output groups 3 and 2 (TP15 to TP8) on a bit-by-bit basis. Bits 7 to 0 NDER15 to NDER8 Description 0 TPC outputs TP15 to TP8 are disabled (NDR15 to NDR8 are not transferred to PB 7 to PB 0) 1 TPC outputs TP15 to TP8 are enabled (NDR15 to NDR8 are transferred to PB 7 to PB 0) 284 (Initial value) 10.2.9 TPC Output Control Register (TPCR) TPCR is an 8-bit readable/writable register that selects output trigger signals for TPC outputs on a group-by-group basis. Bit 7 5 6 4 3 2 1 0 G3CMS1 G3CMS0 G2CMS1 G2CMS0 G1CMS1 G1CMS0 G0CMS1 G0CMS0 Initial value 1 Read/Write R/W 1 1 R/W R/W 1 R/W Group 3 compare match select 1 and 0 These bits select the compare match Group 2 compare event that triggers match select 1 and 0 TPC output group 3 These bits select (TP15 to TP12) the compare match event that triggers TPC output group 2 (TP11 to TP8) 1 R/W 1 R/W 1 1 R/W R/W Group 1 compare match select 1 and 0 These bits select the compare match Group 0 compare event that triggers match select 1 and 0 TPC output group 1 These bits select (TP7 to TP4) the compare match event that triggers TPC output group 0 (TP3 to TP0) TPCR is initialized to H'FF by a reset and in hardware standby mode. It is not initialized in software standby mode. Bits 7 and 6--Group 3 Compare Match Select 1 and 0 (G3CMS1, G3CMS0): These bits select the compare match event that triggers TPC output group 3 (TP15 to TP12). Bit 7 G3CMS1 Bit 6 G3CMS0 0 0 TPC output group 3 (TP 15 to TP12 ) is triggered by compare match in 16-bit timer channel 0 1 TPC output group 3 (TP 15 to TP12 ) is triggered by compare match in 16-bit timer channel 1 0 TPC output group 3 (TP 15 to TP12 ) is triggered by compare match in 16-bit timer channel 2 1 TPC output group 3 (TP 15 to TP12 ) is triggered by compare match in 16-bit timer channel 2 1 Description (Initial value) 285 Bits 5 and 4--Group 2 Compare Match Select 1 and 0 (G2CMS1, G2CMS0): These bits select the compare match event that triggers TPC output group 2 (TP11 to TP8). Bit 5 G2CMS1 Bit 4 G2CMS0 0 0 TPC output group 2 (TP 11 to TP8) is triggered by compare match in 16-bit timer channel 0 1 TPC output group 2 (TP 11 to TP8) is triggered by compare match in 16-bit timer channel 1 0 TPC output group 2 (TP 11 to TP8) is triggered by compare match in 16-bit timer channel 2 1 TPC output group 2 (TP 11 to TP8) is triggered by compare match in 16-bit timer channel 2 1 Description (Initial value) Bits 3 and 2--Group 1 Compare Match Select 1 and 0 (G1CMS1, G1CMS0): These bits select the compare match event that triggers TPC output group 1 (TP7 to TP4). Bit 3 G1CMS1 Bit 2 G1CMS0 0 0 TPC output group 1 (TP 7 to TP4) is triggered by compare match in 16-bit timer channel 0 1 TPC output group 1 (TP 7 to TP4) is triggered by compare match in 16-bit timer channel 1 0 TPC output group 1 (TP 7 to TP4) is triggered by compare match in 16-bit timer channel 2 1 TPC output group 1 (TP 7 to TP4) is triggered by compare match in 16-bit timer channel 2 1 Description (Initial value) Bits 1 and 0--Group 0 Compare Match Select 1 and 0 (G0CMS1, G0CMS0): These bits select the compare match event that triggers TPC output group 0 (TP3 to TP0). Bit 1 G0CMS1 Bit 0 G0CMS0 0 0 TPC output group 0 (TP 3 to TP0) is triggered by compare match in 16-bit timer channel 0 1 TPC output group 0 (TP 3 to TP0) is triggered by compare match in 16-bit timer channel 1 0 TPC output group 0 (TP 3 to TP0) is triggered by compare match in 16-bit timer channel 2 1 TPC output group 0 (TP 3 to TP0) is triggered by compare match in 16-bit timer channel 2 1 286 Description (Initial value) 10.2.10 TPC Output Mode Register (TPMR) TPMR is an 8-bit readable/writable register that selects normal or non-overlapping TPC output for each group. Bit 7 6 5 4 -- -- -- -- Initial value 1 1 1 1 0 0 0 0 Read/Write -- -- -- -- R/W R/W R/W R/W 3 2 G3NOV G2NOV 1 0 G1NOV G0NOV Reserved bits Group 3 non-overlap Selects non-overlapping TPC output for group 3 (TP15 to TP12 ) Group 2 non-overlap Selects non-overlapping TPC output for group 2 (TP11 to TP8 ) Group 1 non-overlap Selects non-overlapping TPC output for group 1 (TP7 to TP4 ) Group 0 non-overlap Selects non-overlapping TPC output for group 0 (TP3 to TP0 ) The output trigger period of a non-overlapping TPC output waveform is set in general register B (GRB) in the 16-bit timer channel selected for output triggering. The non-overlap margin is set in general register A (GRA). The output values change at compare match A and B. For details see section 10.3.4, Non-Overlapping TPC Output. TPMR is initialized to H'F0 by a reset and in hardware standby mode. It is not initialized in software standby mode. Bits 7 to 4--Reserved: These bits cannot be modified and are always read as 1. 287 Bit 3--Group 3 Non-Overlap (G3NOV): Selects normal or non-overlapping TPC output for group 3 (TP15 to TP12). Bit 3 G3NOV Description 0 Normal TPC output in group 3 (output values change at compare match A in the selected 16-bit timer channel) 1 Non-overlapping TPC output in group 3 (independent 1 and 0 output at compare match A and B in the selected 16-bit timer channel) (Initial value) Bit 2--Group 2 Non-Overlap (G2NOV): Selects normal or non-overlapping TPC output for group 2 (TP11 to TP8). Bit 2 G2NOV Description 0 Normal TPC output in group 2 (output values change at compare match A in the selected 16-bit timer channel) 1 Non-overlapping TPC output in group 2 (independent 1 and 0 output at compare match A and B in the selected 16-bit timer channel) (Initial value) Bit 1--Group 1 Non-Overlap (G1NOV): Selects normal or non-overlapping TPC output for group 1 (TP7 to TP4). Bit 1 G1NOV Description 0 Normal TPC output in group 1 (output values change at compare match A in the selected 16-bit timer channel) 1 Non-overlapping TPC output in group 1 (independent 1 and 0 output at compare match A and B in the selected 16-bit timer channel) (Initial value) Bit 0--Group 0 Non-Overlap (G0NOV): Selects normal or non-overlapping TPC output for group 0 (TP3 to TP0). Bit 0 G0NOV Description 0 Normal TPC output in group 0 (output values change at compare match A in the selected 16-bit timer channel) 1 Non-overlapping TPC output in group 0 (independent 1 and 0 output at compare match A and B in the selected 16-bit timer channel) 288 (Initial value) 10.3 Operation 10.3.1 Overview When corresponding bits in PADDR or PBDDR and NDERA or NDERB are set to 1, TPC output is enabled. The TPC output initially consists of the corresponding PADR or PBDR contents. When a compare-match event selected in TPCR occurs, the corresponding NDRA or NDRB bit contents are transferred to PADR or PBDR to update the output values. Figure 10.2 illustrates the TPC output operation. Table 10.3 summarizes the TPC operating conditions. DDR NDER Q Q Output trigger signal C Q DR D Q NDR D Internal data bus TPC output pin Figure 10.2 TPC Output Operation Table 10.3 TPC Operating Conditions NDER DDR Pin Function 0 0 Generic input port 1 Generic output port 0 Generic input port (but the DR bit is a read-only bit, and when compare match occurs, the NDR bit value is transferred to the DR bit) 1 TPC pulse output 1 Sequential output of up to 16-bit patterns is possible by writing new output data to NDRA and NDRB before the next compare match. For information on non-overlapping operation, see section 10.3.4, Non-Overlapping TPC Output. 289 10.3.2 Output Timing If TPC output is enabled, NDRA/NDRB contents are transferred to PADR/PBDR and output when the selected compare match event occurs. Figure 10.3 shows the timing of these operations for the case of normal output in groups 2 and 3, triggered by compare match A. TCNT N GRA N+1 N Compare match A signal NDRB n PBDR m n TP8 to TP15 m n Figure 10.3 Timing of Transfer of Next Data Register Contents and Output (Example) 290 10.3.3 Normal TPC Output Sample Setup Procedure for Normal TPC Output: Figure 10.4 shows a sample procedure for setting up normal TPC output. Normal TPC output 16-bit timer setup Port and TPC setup 16-bit timer setup Select GR functions 1 1. Set TIOR to make GRA an output compare register (with output inhibited). Set GRA value 2 2. Set the TPC output trigger period. Select counting operation 3 3. Select interrupt request 4 Select the counter clock source with bits TPSC2 to TPSC0 in TCR. Select the counter clear source with bits CCLR1 and CCLR0. 4. Enable the IMFA interrupt in TISRA. Set initial output data 5 5. Select port output 6 Set the initial output values in the DR bits of the input/output port pins to be used for TPC output. Enable TPC output 7 6. Set the DDR bits of the input/output port pins to be used for TPC output to 1. Select TPC output trigger 8 7. Set the NDER bits of the pins to be used for TPC output to 1. Set next TPC output data 9 8. Select the 16-bit timer compare match event to be used as the TPC output trigger in TPCR. Start counter 10 9. Set the next TPC output values in the NDR bits. Compare match? No Yes Set next TPC output data 11 10. Set the STR bit to 1 in TSTR to start the timer counter. 11. At each IMFA interrupt, set the next output values in the NDR bits. Figure 10.4 Setup Procedure for Normal TPC Output (Example) 291 Example of Normal TPC Output (Example of Five-Phase Pulse Output): Figure 10.5 shows an example in which the TPC is used for cyclic five-phase pulse output. TCNT value Compare match TCNT GRA Time H'0000 NDRB 80 PBDR 00 C0 80 40 C0 60 40 20 60 30 20 10 30 18 10 08 18 88 08 80 88 C0 80 40 C0 TP15 TP14 TP13 TP12 TP11 1. The 16-bit timer channel to be used as the output trigger channel is set up so that GRA is an output compare register and the counter will be cleared by compare match A. The trigger period is set in GRA. The IMIEA bit is set to 1 in TISRA to enable the compare match A interrupt. 2. H'F8 is written in PBDDR and NDERB, and bits G3CMS1, G3CMS0, G2CMS1, and G2CMS0 are set in TPCR to select compare match in the 16-bit timer channel set up in step 1 as the output trigger. Output data H'80 is written in NDRB. 3. The timer counter in this 16-bit timer channel is started. When compare match A occurs, the NDRB contents are transferred to PBDR and output. The compare match/input capture A (IMFA) interrupt service routine writes the next output data (H'C0) in NDRB. 4. Five-phase overlapping pulse output (one or two phases active at a time) can be obtained by writing H'40, H'60, H'20, H'30, H'10, H'18, H'08, H'88... at successive IMFA interrupts. Figure 10.5 Normal TPC Output Example (Five-Phase Pulse Output) 292 10.3.4 Non-Overlapping TPC Output Sample Setup Procedure for Non-Overlapping TPC Output: Figure 10.6 shows a sample procedure for setting up non-overlapping TPC output. Non-overlapping TPC output 16-bit timer setup Select GR functions 1 1. Set TIOR to make GRA and GRB output compare registers (with output inhibited). Set GR values 2 2. Set the TPC output trigger period in GRB and the non-overlap margin in GRA. Select counting operation 3 Select interrupt requests 4 Set initial output data 5 Set up TPC output 6 Enable TPC transfer 7 6. Set the DDR bits of the input/output port pins to be used for TPC output to 1. Select TPC transfer trigger 8 7. Set the NDER bits of the pins to be used for TPC output to 1. Select non-overlapping groups 9 Set next TPC output data 10 8. In TPCR, select the 16-bit timer compare match event to be used as the TPC output trigger. 3. Select the counter clock source with bits TPSC2 to TPSC0 in TCR. Select the counter clear source with bits CCLR1 and CCLR0. 4. Enable the IMFA interrupt in TISRA. Port and TPC setup 16-bit timer setup 5. Set the initial output values in the DR bits of the input/output port pins to be used for TPC output. 9. In TPMR, select the groups that will operate in non-overlap mode. 11 Start counter Compare match A? No Yes Set next TPC output data 10. Set the next TPC output values in the NDR bits. 11. Set the STR bit to 1 in TSTR to start the timer counter. 12. At each IMFA interrupt, write the next output value in the NDR bits. 12 Figure 10.6 Setup Procedure for Non-Overlapping TPC Output (Example) 293 Example of Non-Overlapping TPC Output (Example of Four-Phase Complementary NonOverlapping Output): Figure 10.7 shows an example of the use of TPC output for four-phase complementary non-overlapping pulse output. TCNT value GRB TCNT GRA Time H'0000 NDRB 95 PBDR 00 65 95 59 05 65 56 41 59 95 50 56 65 14 95 05 65 Non-overlap margin TP15 TP14 TP13 TP12 TP11 TP10 TP9 TP8 1. The 16-bit timer channel to be used as the output trigger channel is set up so that GRA and GRB are output compare registers and the counter will be cleared by compare match B. The TPC output trigger period is set in GRB. The non-overlap margin is set in GRA. The IMIEA bit is set to 1 in TISRA to enable IMFA interrupts. 2. H'FF is written in PBDDR and NDERB, and bits G3CMS1, G3CMS0, G2CMS1, and G2CMS0 are set in TPCR to select compare match in the 16-bit timer channel set up in step 1 as the output trigger. Bits G3NOV and G2NOV are set to 1 in TPMR to select non-overlapping output. Output data H'95 is written in NDRB. 3. The timer counter in this 16-bit timer channel is started. When compare match B occurs, outputs change from 1 to 0. When compare match A occurs, outputs change from 0 to 1 (the change from 0 to 1 is delayed by the value of GRA). The IMFA interrupt service routine writes the next output data (H'65) in NDRB. 4. Four-phase complementary non-overlapping pulse output can be obtained by writing H'59, H'56, H'95... at successive IMFA interrupts. Figure 10.7 Non-Overlapping TPC Output Example (Four-Phase Complementary Non-Overlapping Pulse Output) 294 10.3.5 TPC Output Triggering by Input Capture TPC output can be triggered by 16-bit timer input capture as well as by compare match. If GRA functions as an input capture register in the 16-bit timer channel selected in TPCR, TPC output will be triggered by the input capture signal. Figure 10.8 shows the timing. TIOC pin Input capture signal N NDR DR M N Figure 10.8 TPC Output Triggering by Input Capture (Example) 295 10.4 Usage Notes 10.4.1 Operation of TPC Output Pins TP 0 to TP15 are multiplexed with 16-bit timer, address bus, and other pin functions. When 16-bit timer, or address bus output is enabled, the corresponding pins cannot be used for TPC output. The data transfer from NDR bits to DR bits takes place, however, regardless of the usage of the pin. Pin functions should be changed only under conditions in which the output trigger event will not occur. 10.4.2 Note on Non-Overlapping Output During non-overlapping operation, the transfer of NDR bit values to DR bits takes place as follows. 1. NDR bits are always transferred to DR bits at compare match A. 2. At compare match B, NDR bits are transferred only if their value is 0. Bits are not transferred if their value is 1. Figure 10.9 illustrates the non-overlapping TPC output operation. DDR NDER Q Q Compare match A Compare match B C Q DR D Q NDR TPC output pin Figure 10.9 Non-Overlapping TPC Output 296 D Therefore, 0 data can be transferred ahead of 1 data by making compare match B occur before compare match A. NDR contents should not be altered during the interval from compare match B to compare match A (the non-overlap margin). This can be accomplished by having the IMFA interrupt service routine write the next data in NDR. The next data must be written before the next compare match B occurs. Figure 10.10 shows the timing relationships. Compare match A Compare match B NDR write NDR write NDR DR 0 output 0/1 output 0 output Write to NDR in this interval Do not write to NDR in this interval 0/1 output Write to NDR in this interval Do not write to NDR in this interval Figure 10.10 Non-Overlapping Operation and NDR Write Timing 297 298 Section 11 Watchdog Timer 11.1 Overview The H8/3008 has an on-chip watchdog timer (WDT). The WDT has two selectable functions: it can operate as a watchdog timer to supervise system operation, or it can operate as an interval timer. As a watchdog timer, it generates a reset signal for the H8/3008 chip if a system crash allows the timer counter (TCNT) to overflow before being rewritten. In interval timer operation, an interval timer interrupt is requested at each TCNT overflow. 11.1.1 Features WDT features are listed below. * Selection of eight counter clock sources /2, /32, /64, /128, /256, /512, /2048, or /4096 * Interval timer option * Timer counter overflow generates a reset signal or interrupt. The reset signal is generated in watchdog timer operation. An interval timer interrupt is generated in interval timer operation. * Watchdog timer reset signal resets the entire H8/3008 internally, and can also be output externally. The reset signal generated by timer counter overflow during watchdog timer operation resets the entire H8/3008 internally. An external reset signal can be output from the RESO pin to reset other system devices simultaneously. 299 11.1.2 Block Diagram Figure 11.1 shows a block diagram of the WDT. Overflow TCNT Interrupt signal (interval timer) Interrupt control TCSR Reset control Internal data bus Internal clock sources /2 RSTCSR Reset (internal, external) Read/ write control /32 /64 Clock Clock selector /128 /256 /512 Legend: TCNT: Timer counter TCSR: Timer control/status register RSTCSR: Reset control/status register /2048 /4096 Figure 11.1 WDT Block Diagram 11.1.3 Pin Configuration Table 11.1 describes the WDT output pin. Table 11.1 WDT Pin Name Abbreviation I/O Function Reset output RESO Output* External output of the watchdog timer reset signal Note: * Open-drain output. 300 11.1.4 Register Configuration Table 11.2 summarizes the WDT registers. Table 11.2 WDT Registers Address* 1 Write*2 Read Name Abbreviation H'FFF8C H'FFF8C Timer control/status register H'FFF8D Timer counter H'FFF8E H'FFF8F Reset control/status register R/W Initial Value 3 TCSR R/(W)* H'18 TCNT R/W H'00 3 RSTCSR R/(W)* H'3F Notes: *1 Lower 20 bits of the address in advanced mode. *2 Write word data starting at this address. *3 Only 0 can be written in bit 7, to clear the flag. 11.2 Register Descriptions 11.2.1 Timer Counter (TCNT) TCNT is an 8-bit readable and writable up-counter. Bit 7 6 5 4 3 2 1 0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Note: The method for writing to TCNT is different from that for general registers to prevent inadvertent overwriting. For details see section 11.2.4, Notes on Register Access. When the TME bit is set to 1 in TCSR, TCNT starts counting pulses generated from an internal clock source selected by bits CKS2 to CKS0 in TCSR. When the count overflows (changes from H'FF to H'00), the OVF bit is set to 1 in TCSR. TCNT is initialized to H'00 by a reset and when the TME bit is cleared to 0. 301 11.2.2 Timer Control/Status Register (TCSR) TCSR is an 8-bit readable and writable register. Its functions include selecting the timer mode and clock source. Bit 7 6 5 4 3 2 1 0 OVF WT/IT TME -- -- CKS2 CKS1 CKS0 Initial value 0 0 0 1 1 0 0 0 Read/Write R/(W)* R/W R/W -- -- R/W R/W R/W Clock select These bits select the TCNT clock source Reserved bits Timer enable Selects whether TCNT runs or halts Timer mode select Selects the mode Overflow flag Status flag indicating overflow Notes: The method for writing to TCSR is different from that for general registers to prevent inadvertent overwriting. For details see section 11.2.4, Notes on Register Access. * Only 0 can be written, to clear the flag. Bits 7 to 5 are initialized to 0 by a reset and in standby mode. Bits 2 to 0 are initialized to 0 by a reset. In software standby mode bits 2 to 0 are not initialized, but retain their previous values. Bit 7--Overflow Flag (OVF): This status flag indicates that the timer counter has overflowed from H'FF to H'00. Bit 7 OVF 0 1 302 Description [Clearing condition] Cleared by reading OVF when OVF = 1, then writing 0 in OVF [Setting condition] Set when TCNT changes from H'FF to H'00 (Initial value) Bit 6--Timer Mode Select (WT/IT): Selects whether to use the WDT as a watchdog timer or interval timer. If used as an interval timer, the WDT generates an interval timer interrupt request when TCNT overflows. If used as a watchdog timer, the WDT generates a reset signal when TCNT overflows. Bit 6 WT/IT Description 0 Interval timer: requests interval timer interrupts 1 Watchdog timer: generates a reset signal (Initial value) Bit 5--Timer Enable (TME): Selects whether TCNT runs or is halted. When WT/IT = 1, clear the software standby bit (SSBY) to 0 in SYSCR before setting TME. When setting SSBY to 1, TME should be cleared to 0. Bit 5 TME Description 0 TCNT is initialized to H'00 and halted 1 TCNT is counting (Initial value) Bits 4 and 3--Reserved: These bits cannot be modified and are always read as 1. Bits 2 to 0--Clock Select 2 to 0 (CKS2 to CKS0): These bits select one of eight internal clock sources, obtained by prescaling the system clock (), for input to TCNT. Bit 2 CKS2 Bit 1 CKS1 Bit 0 CKS0 Description 0 0 0 /2 1 /32 0 /64 1 /128 0 /256 1 /512 0 /2048 1 /4096 1 1 0 1 (Initial value) 303 11.2.3 Reset Control/Status Register (RSTCSR) RSTCSR is an 8-bit readable and writable register that indicates when a reset signal has been generated by watchdog timer overflow, and controls external output of the reset signal. Bit 7 6 5 4 3 2 1 0 WRST RSTOE -- -- -- -- -- -- Initial value 0 0 1 1 1 1 1 1 Read/Write R/(W)* R/W -- -- -- -- -- -- Reserved bits Reset output enable Enables or disables external output of the reset signal Watchdog timer reset Indicates that a reset signal has been generated Notes: The method for writing to RSTCSR is different from that for general registers to prevent inadvertent overwriting. For details see section 11.2.4, Notes on Register Access. * Only 0 can be written in bit 7, to clear the flag. Bits 7 and 6 are initialized by input of a reset signal at the RES pin. They are not initialized by reset signals generated by watchdog timer overflow. Bit 7--Watchdog Timer Reset (WRST): During watchdog timer operation, this bit indicates that TCNT has overflowed and generated a reset signal. This reset signal resets the entire H8/3008 chip internally. If bit RSTOE is set to 1, this reset signal is also output (low) at the RESO pin to initialize external system devices. Note that there is no RESO pin in the versions with on-chip flash memory. Bit 7 WRST Description 0 [Clearing conditions] 1 304 * Reset signal at RES pin. * Read WRST when WRST =1, then write 0 in WRST. (Initial value) [Setting condition] Set when TCNT overflow generates a reset signal during watchdog timer operation Bit 6--Reset Output Enable (RSTOE): Enables or disables external output at the RESO pin of the reset signal generated if TCNT overflows during watchdog timer operation. Note that there is no RESO pin in the versions with on-chip flash memory. Bit 6 RSTOE Description 0 Reset signal is not output externally 1 Reset signal is output externally (Initial value) Bits 5 to 0--Reserved: These bits cannot be modified and are always read as 1. 11.2.4 Notes on Register Access The watchdog timer's TCNT, TCSR, and RSTCSR registers differ from other registers in being more difficult to write. The procedures for writing and reading these registers are given below. Writing to TCNT and TCSR: These registers must be written by a word transfer instruction. They cannot be written by byte instructions. Figure 11.2 shows the format of data written to TCNT and TCSR. TCNT and TCSR both have the same write address. The write data must be contained in the lower byte of the written word. The upper byte must contain H'5A (password for TCNT) or H'A5 (password for TCSR). This transfers the write data from the lower byte to TCNT or TCSR. 15 TCNT write Address H'FFF8C * H'5A 15 TCSR write Address 8 7 H'FFF8C * 0 Write data 8 7 H'A5 0 Write data Note: * Lower 20 bits of the address in advanced mode. Figure 11.2 Format of Data Written to TCNT and TCSR 305 Writing to RSTCSR: RSTCSR must be written by a word transfer instruction. It cannot be written by byte transfer instructions. Figure 11.3 shows the format of data written to RSTCSR. To write 0 in the WRST bit, the write data must have H'A5 in the upper byte and H'00 in the lower byte. The data (H'00) in the lower byte is written to RSTCSR, clearing the WRST bit to 0. To write to the RSTOE bit, the upper byte must contain H'5A and the lower byte must contain the write data. Writing this word transfers a write data value into the RSTOE bit. Writing 0 in WRST bit Address H'FFF8E* Writing to RSTOE bit Address 15 H'FFF8E* 8 7 H'A5 15 0 H'00 8 7 H'5A 0 Write data Note: * Lower 20 bits of the address in advanced mode. Figure 11.3 Format of Data Written to RSTCSR Reading TCNT, TCSR, and RSTCSR: For reads of TCNT, TCSR, and RSTCSR, address H'FFF8C is assigned to TCSR, address H'FFF8D to TCNT, and address H'FFF8F to RSTCSR. These registers are therefore read like other registers. Byte transfer instructions can be used for reading. Table 11.3 lists the read addresses of TCNT, TCSR, and RSTCSR. Table 11.3 Read Addresses of TCNT, TCSR, and RSTCSR Address* Register H'FFF8C TCSR H'FFF8D TCNT H'FFF8F RSTCSR Note: * Lower 20 bits of the address in advanced mode. 306 11.3 Operation Operations when the WDT is used as a watchdog timer and as an interval timer are described below. 11.3.1 Watchdog Timer Operation Figure 11.4 illustrates watchdog timer operation. To use the WDT as a watchdog timer, set the WT/IT and TME bits to 1 in TCSR. Software must prevent TCNT overflow by rewriting the TCNT value (normally by writing H'00) before overflow occurs. If TCNT fails to be rewritten and overflows due to a system crash etc., the H8/3008 is internally reset for a duration of 518 states. The watchdog reset signal can be externally output from the RESO pin to reset external system devices. The reset signal is output externally for 132 states. External output can be enabled or disabled by the RSTOE bit in RSTCSR. A watchdog reset has the same vector as a reset generated by input at the RES pin. Software can distinguish a RES reset from a watchdog reset by checking the WRST bit in RSTCSR. If a RES reset and a watchdog reset occur simultaneously, the RES reset takes priority. WDT overflow H'FF TME set to 1 TCNT count value H'00 OVF = 1 Start Internal reset signal H'00 written in TCNT Reset H'00 written in TCNT 518 states RESO 132 states Figure 11.4 Operation in Watchdog Timer Mode 307 11.3.2 Interval Timer Operation Figure 11.5 illustrates interval timer operation. To use the WDT as an interval timer, clear bit WT/IT to 0 and set bit TME to 1 in TCSR. An interval timer interrupt request is generated at each TCNT overflow. This function can be used to generate interval timer interrupts at regular intervals. H'FF TCNT count value Time t H'00 WT/ IT = 0 TME = 1 Interval timer interrupt Interval timer interrupt Interval timer interrupt Interval timer interrupt Figure 11.5 Interval Timer Operation 11.3.3 Timing of Setting of Overflow Flag (OVF) Figure 11.6 shows the timing of setting of the OVF flag. The OVF flag is set to 1 when TCNT overflows. At the same time, a reset signal is generated in watchdog timer operation, or an interval timer interrupt is generated in interval timer operation. TCNT H'FF H'00 Overflow signal OVF Figure 11.6 Timing of Setting of OVF 308 11.3.4 Timing of Setting of Watchdog Timer Reset Bit (WRST) The WRST bit in RSTCSR is valid when bits WT/IT and TME are both set to 1 in TCSR. Figure 11.7 shows the timing of setting of WRST and the internal reset timing. The WRST bit is set to 1 when TCNT overflows and OVF is set to 1. At the same time an internal reset signal is generated for the entire H8/3008 chip. This internal reset signal clears OVF to 0, but the WRST bit remains set to 1. The reset routine must therefore clear the WRST bit. H'FF TCNT H'00 Overflow signal OVF WDT internal reset WRST Figure 11.7 Timing of Setting of WRST Bit and Internal Reset 309 11.4 Interrupts During interval timer operation, an overflow generates an interval timer interrupt (WOVI). The interval timer interrupt is requested whenever the OVF flag is set to 1 in TCSR. 11.5 Usage Notes Contention between TCNT Write and Increment: If a timer counter clock pulse is generated during the T3 state of a write cycle to TCNT, the write takes priority and the timer count is not incremented. See figure 11.8. CPU: TCNT write cycle T1 T2 T3 TCNT Internal write signal TCNT input clock TCNT N M Counter write data Figure 11.8 Contention between TCNT Write and Count up Changing CKS2 to CKS0 Bit: Halt TCNT by clearing the TME bit to 0 in TCSR before changing the values of bits CKS2 to CKS0. 310 Section 12 Serial Communication Interface 12.1 Overview The H8/3008 has a serial communication interface (SCI) with two independent channels. The two channels have identical functions. The SCI can communicate in both asynchronous and synchronous mode. It also has a multiprocessor communication function for serial communication among two or more processors. When the SCI is not used, it can be halted to conserve power. Each SCI channel can be halted independently. For details, see section 18.6, Module Standby Function. The SCI also has a smart card interface function conforming to the ISO/IEC 7816-3 (Identification Card) standard. This function supports serial communication with a smart card. Switching between the normal serial communication interface and the smart card interface is carried out by means of a register setting. 12.1.1 Features SCI features are listed below. * Selection of synchronous or asynchronous mode for serial communication Asynchronous mode Serial data communication is synchronized one character at a time. The SCI can communicate with a universal asynchronous receiver/transmitter (UART), asynchronous communication interface adapter (ACIA), or other chip that employs standard asynchronous communication. It can also communicate with two or more other processors using the multiprocessor communication function. There are twelve selectable serial data transfer formats. Data length: 7 or 8 bits Stop bit length: Parity: Multiprocessor bit: Receive error detection: Break detection: 1 or 2 bits even/odd/none 1 or 0 parity, overrun, and framing errors by reading the RxD level directly when a framing error occurs Synchronous mode Serial data communication is synchronized with a clock signal. The SCI can communicate with other chips having a synchronous communication function. There is a single serial data communication format. Data length: 8 bits Receive error detection: overrun errors 311 * Full-duplex communication The transmitting and receiving sections are independent, so the SCI can transmit and receive simultaneously. The transmitting and receiving sections are both double-buffered, so serial data can be transmitted and received continuously. * The following settings can be made for the serial data to be transferred: LSB-first or MSB-first transfer Inversion of data logic level * Built-in baud rate generator with selectable bit rates * Selectable transmit/receive clock sources: internal clock from baud rate generator, or external clock from the SCK pin * Four types of interrupts Transmit-data-empty, transmit-end, receive-data-full, and receive-error interrupts are requested independently. Features of the smart card interface are listed below. * Asynchronous communication Data length: 8 bits Parity bits generated and checked Error signal output in receive mode (parity error) Error signal detect and automatic data retransmit in transmit mode Supports both direct convention and inverse convention * Built-in baud rate generator with selectable bit rates * Three types of interrupts Transmit-data-empty, receive-data-full, and transmit/receive-error interrupts are requested independently. 312 12.1.2 Block Diagram Bus interface Figure 12.1 shows a block diagram of the SCI. Module data bus RDR TDR SSR BRR SCR RxD TxD RSR TSR SMR Baud rate generator SCMR Transmit/receive control Parity generate Parity check SCK Internal data bus / 4 /16 /64 Clock External clock TEI TXI RXI ERI Legend: RSR: Receive shift register RDR: Receive data register TSR: Transmit shift register TDR: Transmit data register SMR: Serial mode register SCR: Serial control register SSR: Serial status register BRR: Bit rate register SCMR: Smart card mode register Figure 12.1 SCI Block Diagram 313 12.1.3 Pin Configuration The SCI has serial pins for each channel as listed in table 12.1. Table 12.1 SCI Pins Channel Name Abbreviation I/O Function 0 Serial clock pin SCK 0 Input/output SCI0 clock input/output Receive data pin RxD0 Input SCI0 receive data input Transmit data pin TxD0 Output SCI0 transmit data output Serial clock pin SCK 1 Input/output SCI1 clock input/output Receive data pin RxD1 Input SCI1 receive data input Transmit data pin TxD1 Output SCI1 transmit data output 1 314 12.1.4 Register Configuration The SCI has internal registers as listed in table 12.2. These registers select asynchronous or synchronous mode, specify the data format and bit rate, control the transmitter and receiver sections, and specify switching between the serial communication interface and smart card interface. Table 12.2 SCI Registers Channel Address* 1 Name Abbreviation R/W Initial Value 0 H'FFFB0 Serial mode register SMR R/W H'00 H'FFFB1 Bit rate register BRR R/W H'FF H'FFFB2 Serial control register SCR R/W H'00 H'FFFB3 Transmit data register TDR R/W 1 H'FF 2 H'FFFB4 Serial status register SSR R/(W)* H'84 H'FFFB5 Receive data register RDR R H'00 H'FFFB6 Smart card mode register SCMR R/W H'F2 H'FFFB8 Serial mode register SMR R/W H'00 H'FFFB9 Bit rate register BRR R/W H'FF H'FFFBA Serial control register SCR R/W H'00 H'FFFBB Transmit data register TDR R/W H'FF 2 H'FFFBC Serial status register SSR R/(W)* H'84 H'FFFBD Receive data register RDR R H'00 H'FFFBE Smart card mode register SCMR R/W H'F2 Notes: *1 Indicates the lower 20 bits of the address in advanced mode. *2 Only 0 can be written, to clear flags. 315 12.2 Register Descriptions 12.2.1 Receive Shift Register (RSR) RSR is the register that receives serial data. Bit 7 6 5 4 3 2 1 0 Read/Write -- -- -- -- -- -- -- -- The SCI loads serial data input at the RxD pin into RSR in the order received, LSB (bit 0) first, thereby converting the data to parallel data. When one byte of data has been received, it is automatically transferred to RDR. The CPU cannot read or write RSR directly. 12.2.2 Receive Data Register (RDR) RDR is the register that stores received serial data. Bit 7 6 5 4 3 2 1 0 Initial value 0 0 0 0 0 0 0 0 Read/Write R R R R R R R R When the SCI has received one byte of serial data, it transfers the received data from RSR into RDR for storage, completing the receive operation. RSR is then ready to receive the next data. This double-buffering allows data to be received continuously. RDR is a read-only register. Its contents cannot be modified by the CPU. RDR is initialized to H'00 by a reset and in standby mode. 316 12.2.3 Transmit Shift Register (TSR) TSR is the register that transmits serial data. Bit 7 6 5 4 3 2 1 0 Read/Write -- -- -- -- -- -- -- -- The SCI loads transmit data from TDR to TSR, then transmits the data serially from the TxD pin, LSB (bit 0) first. After transmitting one data byte, the SCI automatically loads the next transmit data from TDR into TSR and starts transmitting it. If the TDRE flag is set to 1 in SSR, however, the SCI does not load the TDR contents into TSR. The CPU cannot read or write RSR directly. 12.2.4 Transmit Data Register (TDR) TDR is an 8-bit register that stores data for serial transmission. Bit 7 6 5 4 3 2 1 0 Initial value 1 1 1 1 1 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W When the SCI detects that TSR is empty, it moves transmit data written in TDR from TDR into TSR and starts serial transmission. Continuous serial transmission is possible by writing the next transmit data in TDR during serial transmission from TSR. The CPU can always read and write TDR. TDR is initialized to H'FF by a reset and in standby mode. 317 12.2.5 Serial Mode Register (SMR) SMR is an 8-bit register that specifies the SCI's serial communication format and selects the clock source for the baud rate generator. 7 6 5 4 3 2 1 0 C/A CHR PE O/E STOP MP CKS1 CKS0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Bit Clock select 1/0 These bits select the baud rate generator's clock source Multiprocessor mode Selects the multiprocessor function Stop bit length Selects the stop bit length Parity mode Selects even or odd parity Parity enable Selects whether a parity bit is added Character length Selects character length in asynchronous mode Communication mode Selects asynchronous or synchronous mode The CPU can always read and write SMR. SMR is initialized to H'00 by a reset and in standby mode. Bit 7--Communication Mode (C/A)/GSM Mode (GM): The function of this bit differs for the normal serial communication interface and for the smart card interface. Its function is switched with the SMIF bit in SCMR. For Serial Communication Interface (SMIF Bit in SCMR Cleared to 0): Selects whether the SCI operates in asynchronous or synchronous mode. 318 Bit 7 C/A Description 0 Asynchronous mode 1 Synchronous mode (Initial value) For Smart Card Interface (SMIF Bit in SCMR Set to 1): Selects GSM mode for the smart card interface. Bit 7 GM Description 0 The TEND flag is set 12.5 etu after the start bit 1 The TEND flag is set 11.0 etu after the start bit (Initial value) Note: etu: Elementary time unit (time required to transmit one bit) Bit 6--Character Length (CHR): Selects 7-bit or 8-bits data length in asynchronous mode. In synchronous mode, the data length is 8 bits regardless of the CHR setting, Bit 6 CHR Description 0 8-bit data 1 7-bit data* (Initial value) Note: * When 7-bit data is selected, the MSB (bit 7) of TDR is not transmitted. Bit 5--Parity Enable (PE): In asynchronous mode, this bit enables or disables the addition of a parity bit to transmit data, and the checking of the parity bit in receive data. In synchronous mode, the parity bit is neither added nor checked, regardless of the PE bit setting. Bit 5 PE Description 0 Parity bit not added or checked 1 Parity bit added and checked* (Initial value) Note: * When PE bit is set to 1, an even or odd parity bit is added to transmit data according to the even or odd parity mode selection by the O/E bit, and the parity bit in receive data is checked to see that it matches the even or odd mode selected by the O/E bit. Bit 4--Parity Mode (O/E): Specifies whether even parity or odd parity is used for parity addition and checking. The O/E bit setting is only valid when the PE bit is set to 1, enabling parity bit addition and checking, in asynchronous mode. The O/E bit setting is ignored in synchronous mode, or when parity addition and checking is disabled in asynchronous mode. 319 Bit 4 O/E Description 0 Even parity* 1 1 (Initial value) 2 Odd parity* Notes: *1 When even parity is selected, the parity bit added to transmit data makes an even number of 1s in the transmitted character and parity bit combined. Receive data must have an even number of 1s in the received character and parity bit combined. *2 When odd parity is selected, the parity bit added to transmit data makes an odd number of 1s in the transmitted character and parity bit combined. Receive data must have an odd number of 1s in the received character and parity bit combined. Bit 3--Stop Bit Length (STOP): Selects one or two stop bits in asynchronous mode. This setting is used only in asynchronous mode. In synchronous mod no stop bit is added, so the STOP bit setting is ignored. Bit 3 STOP Description 0 1 stop bit*1 1 2 stop bits* (Initial value) 2 Notes: *1 One stop bit (with value 1) is added to the end of each transmitted character. *2 Two stop bits (with value 1) are added to the end of each transmitted character. In receiving, only the first stop bit is checked, regardless of the STOP bit setting. If the second stop bit is 1, it is treated as a stop bit. If the second stop bit is 0, it is treated as the start bit of the next incoming character. Bit 2--Multiprocessor Mode (MP): Selects a multiprocessor format. When a multiprocessor format is selected, parity settings made by the PE and O/E bits are ignored. The MP bit setting is valid only in asynchronous mode. It is ignored in synchronous mode. For further information on the multiprocessor communication function, see section 12.3.3, Multiprocessor Communication. Bit 2 MP Description 0 Multiprocessor function disabled 1 Multiprocessor format selected (Initial value) Bits 1 and 0--Clock Select 1 and 0 (CKS1, CKS0): These bits select the clock source for the onchip baud rate generator. Four clock sources can be selected by the CKS1 and CKS0 bits: o, o/4, o/16, and o/64. 320 For the relationship between the clock source, bit rate register setting, and baud rate, see section 12.2.8, Bit Rate Register (BRR). Bit 1 CKS1 Bit 0 CKS0 Description 0 0 0 1 /4 1 0 /16 1 1 /64 12.2.6 (Initial value) Serial Control Register (SCR) SCR register enables or disables the SCI transmitter and receiver, enables or disables serial clock output in asynchronous mode, enables or disables interrupts, and selects the transmit/receive clock source. Bit 7 6 5 4 3 2 1 0 TIE RIE TE RE MPIE TEIE CKE1 CKE0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Clock enable 1/0 These bits select the SCI clock source Transmit-end interrupt enable Enables or disables transmit-end interrupts (TEI) Multiprocessor interrupt enable Enables or disables multiprocessor interrupts Receive enable Enables or disables the receiver Transmit enable Enables or disables the transmitter Receive interrupt enable Enables or disables receive-data-full interrupts (RxI) and receive-error interrupts (ERI) Transmit interrupt enable Enables or disables transmit-data-empty interrupts (TxI) 321 The CPU can always read and write SCR. SCR is initialized to H'00 by a reset and in standby mode. Bit 7--Transmit Interrupt Enable (TIE): Enables or disables the transmit-data-empty interrupt (TXI) requested when the TDRE flag in SSR is set to 1 due to transfer of serial transmit data from TDR to TSR. Bit 7 TIE Description 0 Transmit-data-empty interrupt request (TXI) is disabled* 1 Transmit-data-empty interrupt request (TXI) is enabled (Initial value) Note: * TXI interrupt requests can be cleared by reading the value 1 from the TDRE flag, then clearing it to 0; or by clearing the TIE bit to 0. Bit 6--Receive Interrupt Enable (RIE): Enables or disables the receive-data-full interrupt (RXI) requested when the RDRF flag in SSR is set to 1 due to transfer of serial receive data from RSR to RDR; also enables or disables the receive-error interrupt (ERI). Bit 6 RIE Description 0 Receive-data-full (RXI) and receive-error (ERI) interrupt requests are disabled* (Initial value) 1 Receive-data-full (RXI) and receive-error (ERI) interrupt requests are enabled Note: * RXI and ERI interrupt requests can be cleared by reading the value 1 from the RDRF, FER, PER, or ORER flag, then clearing the flag to 0; or by clearing the RIE bit to 0. Bit 5--Transmit Enable (TE): Enables or disables the start of SCI serial transmitting operations. Bit 5 TE Description 0 Transmitting disabled*1 1 2 Transmitting enabled* (Initial value) Notes: *1 The TDRE flag is fixed at 1 in SSR. *2 In the enabled state, serial transmission starts when the TDRE flag in SSR is cleared to 0 after writing of transmit data into TDR. Select the transmit format in SMR before setting the TE bit to 1. Bit 4--Receive Enable (RE): Enables or disables the start of SCI serial receiving operations. 322 Bit 4 RE Description 0 Receiving disabled*1 1 2 Receiving enabled* (Initial value) Notes: *1 Clearing the RE bit to 0 does not affect the RDRF, FER, PER, and ORER flags. These flags retain their previous values. *2 In the enabled state, serial receiving starts when a start bit is detected in asynchronous mode, or serial clock input is detected in synchronous mode. Select the receive format in SMR before setting the RE bit to 1. Bit 3--Multiprocessor Interrupt Enable (MPIE): Enables or disables multiprocessor interrupts. The MPIE bit setting is valid only in asynchronous mode, and only if the MP bit is set to 1 in SMR. The MPIE bit setting is ignored in synchronous mode or when the MP bit is cleared to 0. Bit 3 MPIE Description 0 Multiprocessor interrupts are disabled (normal receive operation) (Initial value) [Clearing conditions] * The MPIE bit is cleared to 0 * MPB = 1 in received data 1 Multiprocessor interrupts are enabled* Receive-data-full interrupts (RXI), receive-error interrupts (ERI), and setting of the RDRF, FER, and ORER status flags in SSR are disabled until data with the multiprocessor bit set to 1 is received. Note: * The SCI does not transfer receive data from RSR to RDR, does not detect receive errors, and does not set the RDRF, FER, and ORER flags in SSR. When it receives data in which MPB = 1, the SCI sets the MPB bit to 1 in SSR, automatically clears the MPIE bit to 0, enables RXI and ERI interrupts (if the TIE and RIE bits in SCR are set to 1), and allows the FER and ORER flags to be set. Bit 2--Transmit-End interrupt Enable (TEIE): Enables or disables the transmit-end interrupt (TEI) requested if TDR does not contain valid transmit data when the MSB is transmitted. Bit 2 TEIE Description 0 Transmit-end interrupt requests (TEI) are disabled* 1 Transmit-end interrupt requests (TEI) are enabled* (Initial value) Note: * TEI interrupt requests can be cleared by reading the value 1 from the TDRE flag in SSR, then clearing the TDRE flag to 0, thereby also clearing the TEND flag to 0; or by clearing the TEIE bit to 0. Bits 1 and 0--Clock Enable 1 and 0 (CKE1, CKE0): The function of these bits differs for the normal serial communication interface and for the smart card interface. Their function is switched with the SMIF bit in SCMR. 323 For serial communication interface (SMIF bit in SCMR cleared to 0): These bits select the SCI clock source and enable or disable clock output from the SCK pin. Depending on the settings of CKE1 and CKE0, the SCK pin can be used for generic input/output, serial clock output, or serial clock input. The CKE0 setting is valid only in asynchronous mode, and only when the SCI is internally clocked (CKE1 = 0). The CKE0 setting is ignored in synchronous mode, or when an external clock source is selected (CKE1 = 1). Select the SCI operating mode in SMR before setting the CKE1 and CKE0 bits . For further details on selection of the SCI clock source, see table 12.9 in section 12.3, Operation. Bit 1 Bit 0 CKE1 CKE0 Description 0 0 1 1 0 1 0 1 Asynchronous mode Internal clock, SCK pin available for generic input/output*1 Synchronous mode Internal clock, SCK pin used for serial clock output*1 Asynchronous mode Internal clock, SCK pin used for clock output*2 Synchronous mode Internal clock, SCK pin used for serial clock output Asynchronous mode External clock, SCK pin used for clock input* 3 Synchronous mode External clock, SCK pin used for serial clock input Asynchronous mode External clock, SCK pin used for clock input* 3 Synchronous mode External clock, SCK pin used for serial clock input Notes: *1 Initial value *2 The output clock frequency is the same as the bit rate. *3 The input clock frequency is 16 times the bit rate. For smart card interface (SMIF bit in SCMR set to 1): These bits, together with the GM bit in SMR, determine whether the SCK pin is used for generic input/output or as the serial clock output pin. SMR GM Bit 1 Bit 0 CKE1 CKE0 Description 0 0 0 SCK pin available for generic input/output 0 0 1 SCK pin used for clock output 1 0 0 SCK pin output fixed low 1 0 1 SCK pin used for clock output 1 1 0 SCK pin output fixed high 1 1 1 SCK pin used for clock output 324 (Initial value) 12.2.7 Serial Status Register (SSR) SSR is an 8-bit register containing multiprocessor bit values, and status flags that indicate the operating status of the SCI. Bit Initial value Read/Write 5 7 6 TDRE RDRF 1 0 R/(W)*1 4 ORER FER/ERS 0 R/(W)*1 0 R/(W)*1 3 2 1 0 PER TEND MPB MPBT 1 0 0 R R R/W 0 R/(W)*1 1 R/(W)* Multiprocessor bit transfer Value of multiprocessor bit to be transmitted Multiprocessor bit Stores the received multiprocessor bit value Transmit end*2 Status flag indicating end of transmission Parity error Status flag indicating detection of a receive parity error Framing error (FER)/Error signal status (ERS)*2 Status flag indicating detection of a receive framing error, or flag indicating detection of an error signal Overrun error Status flag indicating detection of a receive overrun error Receive data register full Status flag indicating that data has been received and stored in RDR Transmit data register empty Status flag indicating that transmit data has been transferred from TDR into TSR and new data can be written in TDR Notes: *1 Only 0 can be written, to clear the flag. *2 Function differs between the normal serial communication interface and the smart card interface. 325 The CPU can always read and write SSR, but cannot write 1 in the TDRE, RDRF, ORER, PER, and FER flags. These flags can be cleared to 0 only if they have first been read while set to 1. The TEND and MPB flags are read-only bits that cannot be written. SSR is initialized to H'84 by a reset and in standby mode. Bit 7--Transmit Data Register Empty (TDRE): Indicates that the SCI has loaded transmit data from TDR into TSR and the next serial data can be written in TDR. Bit 7 TDRE Description 0 TDR contains valid transmit data [Clearing condition] Read TDRE when TDRE = 1, then write 0 in TDRE 1 TDR does not contain valid transmit data (Initial value) [Setting conditions] * The chip is reset or enters standby mode * The TE bit in SCR is cleared to 0 * TDR contents are loaded into TSR, so new data can be written in TDR Bit 6--Receive Data Register Full (RDRF): Indicates that RDR contains new receive data. Bit 6 RDRF Description 0 RDR does not contain new receive data [Clearing conditions] * The chip is reset or enters standby mode * Read RDRF when RDRF = 1, then write 0 in RDRF (Initial value) 1 RDR contains new receive data [Setting condition] Serial data is received normally and transferred from RSR to RDR Note: The RDR contents and the RDRF flag are not affected by detection of receive errors or by clearing of the RE bit to 0 in SCR. They retain their previous values. If the RDRF flag is still set to 1 when reception of the next data ends, an overrun error will occur and the receive data will be lost. 326 Bit 5--Overrun Error (ORER): Indicates that data reception ended abnormally due to an overrun error. Bit 5 ORER Description 0 Receiving is in progress or has ended normally* 1 [Clearing conditions] * The chip is reset or enters standby mode * Read ORER when ORER = 1, then write 0 in ORER 1 A receive overrun error occurred*2 [Setting condition] Reception of the next serial data ends when RDRF = 1 (Initial value) Notes: *1 Clearing the RE bit to 0 in SCR does not affect the ORER flag, which retains its previous value. *2 RDR continues to hold the receive data prior to the overrun error, so subsequent receive data is lost. Serial receiving cannot continue while the ORER flag is set to 1. In synchronous mode, serial transmitting is also disabled. Bit 4--Framing Error (FER)/Error Signal Status (ERS): The function of this bit differs for the normal serial communication interface and for the smart card interface. Its function is switched with the SMIF bit in SCMR. For serial communication interface (SMIF bit in SCMR cleared to 0): Indicates that data reception ended abnormally due to a framing error in asynchronous mode. Bit 4 FER Description 0 Receiving is in progress or has ended normally* 1 [Clearing conditions] * The chip is reset or enters standby mode * Read FER when FER = 1, then write 0 in FER 1 A receive framing error occurred [Setting condition] The stop bit at the end of the receive data is checked for a value of 1, and is found to be 0.* 2 (Initial value) Notes: *1 Clearing the RE bit to 0 in SCR does not affect the FER flag, which retains its previous value. *2 When the stop bit length is 2 bits, only the first bit is checked for a value of 1. The second stop bit is not checked. When a framing error occurs the SCI transfers the receive data into RDR but does not set the RDRF flag. Serial receiving cannot continue while the FER flag is set to 1. In synchronous mode, serial transmitting is also disabled. 327 For Smart Card Interface (SMIF Bit in SCMR Set to 1): Indicates the status of the error signal sent back from the receiving side during transmission. Framing errors are not detected in smart card interface mode. Bit 4 ERS Description 0 Normal reception, no error signal* [Clearing conditions] * The chip is reset or enters standby mode * Read ERS when ERS = 1, then write 0 in ERS (Initial value) 1 An error signal has been sent from the receiving side indicating detection of a parity error [Setting condition] The error signal is low when sampled Note: * Clearing the TE bit to 0 in SCR does not affect the ERS flag, which retains its previous value. Bit 3--Parity Error (PER): Indicates that reception of data with parity added ended abnormally due to a parity error in asynchronous mode. Bit 3 PER Description 0 Receiving is in progress or has ended normally* 1 [Clearing conditions] * The chip is reset or enters standby mode * Read PER when PER = 1, then write 0 in PER 1 A receive parity error occurred*2 [Setting condition] The number of 1s in receive data, including the parity bit, does not match the even or odd parity setting of O/E in SMR (Initial value) Notes: *1 Clearing the RE bit to 0 in SCR does not affect the PER flag, which retains its previous value. *2 When a parity error occurs the SCI transfers the receive data into RDR but does not set the RDRF flag. Serial receiving cannot continue while the PER flag is set to 1. In synchronous mode, serial transmitting is also disabled. Bit 2--Transmit End (TEND): The function of this bit differs for the normal serial communication interface and for the smart card interface. Its function is switched with the SMIF bit in SCMR. For Serial Communication Interface (SMIF Bit in SCMR Cleared to 0): Indicates that when the last bit of a serial character was transmitted TDR did not contain valid transmit data, so transmission has ended. The TEND flag is a read-only bit and cannot be written. 328 Bit 2 TEND Description 0 Transmission is in progress [Clearing condition] Read TDRE when TDRE = 1, then write 0 in TDRE 1 End of transmission (Initial value) [Setting conditions] * The chip is reset or enters standby mode * The TE bit in SCR is cleared to 0 * TDRE is 1 when the last bit of a 1-byte serial transmit character is transmitted For Smart Card Interface (SMIF Bit in SCMR Set to 1): Indicates that when the last bit of a serial character was transmitted TDR did not contain valid transmit data, so transmission has ended. The TEND flag is a read-only bit and cannot be written. Bit 2 TEND Description 0 Transmission is in progress [Clearing condition] Read TDRE when TDRE = 1, then write 0 in TDRE 1 End of transmission (Initial value) [Setting conditions] * The chip is reset or enters standby mode * The TE bit is cleared to 0 in SCR and the FER/ERS bit is also cleared to 0 * TDRE is 1 and FER/ERS is 0 (normal transmission) 2.5 etu (when GM = 0) or 1.0 etu (when GM = 1) after a 1-byte serial character is transmitted Note: etu: Elementary time unit (time required to transmit one bit) Bit 1--Multiprocessor bit (MPB): Stores the value of the multiprocessor bit in the receive data when a multiprocessor format is used in asynchronous mode. MPB is a read-only bit, and cannot be written. Bit 1 MPB Description 0 Multiprocessor bit value in receive data is 0* 1 Multiprocessor bit value in receive data is 1 (Initial value) Note: * If the RE bit in SCR is cleared to 0 when a multiprocessor format is selected, MPB retains its previous value. 329 Bit 0--Multiprocessor Bit Transfer (MPBT): Stores the value of the multiprocessor bit added to transmit data when a multiprocessor format in selected for transmitting in asynchronous mode. The MPBT bit setting is ignored in synchronous mode, when a multiprocessor format is not selected, or when the SCI cannot transmit. Bit 0 MPBT Description 0 Multiprocessor bit value in transmit data is 0 1 Multiprocessor bit value in transmit data is 1 12.2.8 (Initial value) Bit Rate Register (BRR) BRR is an 8-bit register that sets the serial transmit/receive bit rate in accordance with the baud rate generator operating clock selected by bits CKS0 and CKS1 in SMR. Bit 7 6 5 4 3 2 1 0 Initial value 1 1 1 1 1 1 1 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W BRR can be read or written to by the CPU at all times. BRR is initialized to H'FF by a reset and in standby mode. As baud rate generator control is performed independently for each channel, different values can be set for each channel. Table 12.3 shows examples of BRR settings in asynchronous mode. Table 12.4 shows examples of BRR settings in synchronous mode. 330 Table 12.3 Examples of Bit Rates and BRR Settings in Asynchronous Mode (MHz) 2 2.097152 2.4576 3 Bit Rate (bit/s) n N 110 1 141 0.03 1 148 -0.04 1 174 -0.26 1 212 0.03 150 1 103 0.16 1 108 0.21 1 127 0.00 1 155 0.16 300 0 207 0.16 0 217 0.21 0 255 0.00 1 77 600 0 103 0.16 0 108 0.21 0 127 0.00 0 155 0.16 1200 0 51 0.16 0 54 -0.70 0 63 0.00 0 77 0.16 2400 0 25 0.16 0 26 1.14 0 31 0.00 0 38 0.16 4800 0 12 0.16 0 13 -2.48 0 15 0.00 0 19 -2.34 9600 0 6 -6.99 0 6 -2.48 0 7 0.00 0 9 -2.34 19200 0 2 8.51 0 2 13.78 0 3 0.00 0 4 -2.34 31250 0 1 0.00 0 1 4.86 0 1 22.88 0 2 0.00 38400 0 1 -18.62 0 1 -14.67 0 1 0.00 -- -- -- Error (%) n N Error (%) n N Error (%) n N Error (%) 0.16 (MHz) 3.6864 4 4.9152 5 Bit Rate (bit/s) n N Error (%) n N Error (%) n N Error (%) n N Error (%) 110 2 64 0.70 2 70 0.03 2 86 0.31 2 88 -0.25 150 1 191 0.00 1 207 0.16 1 255 0.00 2 64 0.16 300 1 95 0.00 1 103 0.16 1 127 0.00 1 129 0.16 600 0 191 0.00 0 207 0.16 0 255 0.00 1 64 1200 0 95 0.00 0 103 0.16 0 127 0.00 0 129 0.16 2400 0 47 0.00 0 51 0.16 0 63 0.00 0 64 0.16 4800 0 23 0.00 0 25 0.16 0 31 0.00 0 32 -1.36 9600 0 11 0.00 0 12 0.16 0 15 0.00 0 15 1.73 19200 0 5 0.00 0 6 -6.99 0 7 0.00 0 7 1.73 31250 -- -- -- 0 3 0.00 0 4 -1.70 0 4 0.00 38400 0 2 0.00 0 2 8.51 0 3 0.00 0 3 1.73 0.16 331 (MHz) 6 6.144 7.3728 8 Bit Rate (bit/s) n N 110 2 106 -0.44 2 108 0.08 2 130 -0.07 2 141 0.03 150 2 77 0.16 2 79 0.00 2 95 0.00 2 103 0.16 300 1 155 0.16 1 159 0.00 1 191 0.00 1 207 0.16 600 1 77 0.16 1 79 0.00 1 95 0.00 1 103 0.16 1200 0 155 0.16 0 159 0.00 0 191 0.00 0 207 0.16 2400 0 77 0.16 0 79 0.00 0 95 0.00 0 103 0.16 4800 0 38 0.16 0 39 0.00 0 47 0.00 0 51 0.16 9600 0 19 -2.34 0 19 0.00 0 23 0.00 0 25 0.16 19200 0 9 -2.34 0 9 0.00 0 11 0.00 0 12 0.16 31250 0 5 0.00 0 5 2.40 0 6 5.33 0 7 0.00 38400 0 4 -2.34 0 4 0.00 0 5 0.00 0 6 -6.99 Error (%) n N Error (%) n N Error (%) n N Error (%) (MHz) 9.8304 10 12 12.288 Bit Rate (bit/s) n N 110 2 174 -0.26 2 177 -0.25 2 212 0.03 2 217 0.08 150 2 127 0.00 2 129 0.16 2 155 0.16 2 159 0.00 300 1 255 0.00 2 64 0.16 2 77 0.16 2 79 600 1 127 0.00 1 129 0.16 1 155 0.16 1 159 0.00 1200 0 255 0.00 1 64 0.16 1 77 0.16 1 79 2400 0 127 0.00 0 129 0.16 0 155 0.16 0 159 0.00 4800 0 63 0.00 0 64 0.16 0 77 0.16 0 79 0.00 9600 0 31 0.00 0 32 -1.36 0 38 0.16 0 39 0.00 19200 0 15 0.00 0 15 1.73 0 19 -2.34 0 19 0.00 31250 0 9 -1.70 0 9 0.00 0 11 0.00 0 11 2.40 38400 0 7 0.00 0 7 1.73 0 9 -2.34 0 9 0.00 332 Error (%) n N Error (%) n N Error (%) n N Error (%) 0.00 0.00 (MHz) 13 14 Bit Rate (bit/s) n N 110 2 230 -0.08 2 248 -0.17 150 2 168 0.16 2 300 2 84 600 1 1200 Error (%) n Error (%) n N Error (%) 3 64 0.70 3 70 0.03 181 0.16 2 191 0.00 2 207 0.16 2 90 0.16 2 95 0.00 2 103 0.16 168 0.16 1 181 0.16 1 191 0.00 1 207 0.16 1 84 1 90 0.16 1 95 0.00 1 103 0.16 2400 0 168 0.16 0 181 0.16 0 191 0.00 0 207 0.16 4800 0 84 -0.43 0 90 0.16 0 95 0.00 0 103 0.16 9600 0 41 0.76 0 45 -0.93 0 47 0.00 0 51 0.16 19200 0 20 0.76 0 22 -0.93 0 23 0.00 0 25 0.16 31250 0 12 0.00 0 13 0.00 0 14 -1.70 0 15 0.00 38400 0 10 -3.82 0 10 3.57 0 11 0.00 0 12 0.16 -0.43 Error (%) n 16 N -0.43 N 14.7456 (MHz) 18 20 25 Bit Rate (bit/s) n N Error (%) n N Error (%) n N 110 3 79 -0.12 3 88 -0.25 3 110 -0.02 150 2 233 0.16 3 64 0.16 3 80 300 2 116 0.16 2 129 0.16 2 162 0.15 600 1 233 0.16 2 64 0.16 2 80 1200 1 116 0.16 1 129 0.16 1 162 0.15 2400 0 233 0.16 1 64 0.16 1 80 4800 0 116 0.16 0 129 0.16 0 162 0.15 9600 0 58 -0.69 0 64 0.16 0 80 -0.47 19200 0 28 1.02 0 32 -1.36 0 40 -0.76 31250 0 17 0.00 0 19 0.00 0 24 0.00 38400 0 14 -2.34 0 15 1.73 0 19 1.73 Error (%) -0.47 -0.47 -0.47 333 Table 12.4 Examples of Bit Rates and BRR Settings in Synchronous Mode (MHz) Bit Rate 2 4 8 10 13 16 18 20 25 (bit/s) n N n N n N n N n N n N n N n N n N 110 3 70 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 250 2 124 2 249 3 124 -- -- 3 202 3 249 -- -- -- -- -- -- 500 1 249 2 124 2 249 -- -- 3 101 3 124 3 140 3 155 -- -- 1k 1 124 1 249 2 124 -- -- 2 202 2 249 3 69 77 97 2.5k 0 199 1 99 199 1 249 2 80 99 2 112 2 124 2 155 5k 0 99 0 199 1 99 1 124 1 162 1 199 1 224 1 249 2 77 10k 0 49 0 99 0 199 0 249 1 80 99 1 112 1 124 1 155 25k 0 19 0 39 0 79 0 99 0 129 0 159 0 179 0 199 0 249 50k 0 9 0 19 0 39 0 49 0 64 0 79 0 89 0 99 0 124 100k 0 4 0 9 0 19 0 24 -- -- 0 39 0 44 0 49 0 62 250k 0 1 0 3 0 7 0 9 0 12 0 15 0 17 0 19 0 24 500k 0 0* 0 1 0 3 0 4 -- -- 0 7 0 8 0 9 -- -- 0 0* 0 1 -- -- -- -- 0 3 0 4 0 4 -- -- 2M 0 0* -- -- -- -- 0 1 -- -- -- -- -- -- 2.5M -- -- 0 0* -- -- -- -- -- -- -- -- -- -- 0 0* -- -- -- -- -- -- 1M 4M 1 2 1 Note: Settings with an error of 1% or less are recommended. Legend Blank: No setting available --: Setting possible, but error occurs *: Continuous transmission/reception not possible 334 3 3 The BRR setting is calculated as follows: Asynchronous mode: N= 64 x 22n-1 x B x 106 - 1 Synchronous mode: N= B: N: : n: 8x 22n-1 xB x 106 - 1 Bit rate (bit/s) BRR setting for baud rate generator (0 N 255) System clock frequency (MHz) Baud rate generator input clock (n = 0, 1, 2, 3) (For the clock sources and values of n, see the following table.) SMR Settings n Clock Source CKS1 CKS0 0 0 0 1 /4 0 1 2 /16 1 0 3 /64 1 1 The bit rate error in asynchronous mode is calculated as follows: Error (%) = x 106 (N + 1) x B x 64 x 22n-1 - 1 x 100 335 Table 12.5 shows the maximum bit rates in asynchronous mode for various system clock frequencies. Tables 12.6 and 12.7 show the maximum bit rates with external clock input. Table 12.5 Maximum Bit Rates for Various Frequencies (Asynchronous Mode) Settings (MHz) Maximum Bit Rate (bit/s) n N 2 62500 0 0 2.097152 65536 0 0 2.4576 76800 0 0 3 93750 0 0 3.6864 115200 0 0 4 125000 0 0 4.9152 153600 0 0 5 156250 0 0 6 187500 0 0 6.144 192000 0 0 7.3728 230400 0 0 8 250000 0 0 9.8304 307200 0 0 10 312500 0 0 12 375000 0 0 12.288 384000 0 0 14 437500 0 0 14.7456 460800 0 0 16 500000 0 0 17.2032 537600 0 0 18 562500 0 0 20 625000 0 0 25 781250 0 0 336 Table 12.6 Maximum Bit Rates with External Clock Input (Asynchronous Mode) (MHz) External Input Clock (MHz) Maximum Bit Rate (bit/s) 2 0.5000 31250 2.097152 0.5243 32768 2.4576 0.6144 38400 3 0.7500 46875 3.6864 0.9216 57600 4 1.0000 62500 4.9152 1.2288 76800 5 1.2500 78125 6 1.5000 93750 6.144 1.5360 96000 7.3728 1.8432 115200 8 2.0000 125000 9.8304 2.4576 153600 10 2.5000 156250 12 3.0000 187500 12.288 3.0720 192000 14 3.5000 218750 14.7456 3.6864 230400 16 4.0000 250000 17.2032 4.3008 268800 18 4.5000 281250 20 5.0000 312500 25 6.2500 390625 337 Table 12.7 Maximum Bit Rates with External Clock Input (Synchronous Mode) (MHz) External Input Clock (MHz) Maximum Bit Rate (bit/s) 2 0.3333 333333.3 4 0.6667 666666.7 6 1.0000 1000000.0 8 1.3333 1333333.3 10 1.6667 1666666.7 12 2.0000 2000000.0 14 2.3333 2333333.3 16 2.6667 2666666.7 18 3.0000 3000000.0 20 3.3333 3333333.3 25 4.1667 4166666.7 12.3 Operation 12.3.1 Overview The SCI can carry out serial communication in two modes: asynchronous mode in which synchronization is achieved character by character, and synchronous mode in which synchronization is achieved with clock pulses. A smart card interface is also supported as a serial communication function for an IC card interface. Selection of asynchronous or synchronous mode and the transmission format for the normal serial communication interface is made in SMR, as shown in table 12.8. The SCI clock source is selected by the C/A bit in SMR and the CKE1 and CKE0 bits in SCR, as shown in table 12.9. For details of the procedures for switching between LSB-first and MSB-first mode and inverting the data logic level, see section 13.2.1, Smart Card Mode Register (SCMR). For selection of the smart card interface format, see section 13.3.3, Data Format. 338 Asynchronous Mode * Data length is selectable: 7 or 8 bits * Parity and multiprocessor bits are selectable, and so is the stop bit length (1 or 2 bits). These selections determine the communication format and character length. * In receiving, it is possible to detect framing errors, parity errors, overrun errors, and the break state. * An internal or external clock can be selected as the SCI clock source. When an internal clock is selected, the SCI operates using the on-chip baud rate generator, and can output a serial clock signal with a frequency matching the bit rate. When an external clock is selected, the external clock input must have a frequency 16 times the bit rate. (The on-chip baud rate generator is not used.) Synchronous Mode * The communication format has a fixed 8-bit data length. * In receiving, it is possible to detect overrun errors. * An internal or external clock can be selected as the SCI clock source. When an internal clock is selected, the SCI operates using the on-chip baud rate generator, and can output a serial clock signal to external devices. When an external clock is selected, the SCI operates on the input serial clock. The on-chip baud rate generator is not used. Smart Card Interface * One frame consists of 8-bit data and a parity bit. * In transmitting, a guard time of at least two elementary time units (2 etu) is provided between the end of the parity bit and the start of he next frame. (An elementary time unit is the time required to transmit one bit.) * In receiving, if a parity error is detected, a low error signal level is output for 1 etu, beginning 10.5 etu after the start bit.. * In transmitting, if an error signal is received, the same data is automatically transmitted again after at least 2 etu. * Only asynchronous communication is supported. There is no synchronous communication function. For details of smart card interface operation, see section 13, Smart Card Interface. 339 Table 12.8 SMR Settings and Serial Communication Formats SMR Settings SCI Communication Format Bit 7 C/A Bit 6 CHR Bit 2 MP Bit 5 PE Bit 3 STOP 0 0 0 0 0 1 1 0 Mode Asynchronous mode Data Length Multiprocessor Bit Parity Bit Stop Bit Length 8-bit data Absent Absent 1 bit 2 bits Present 1 1 0 2 bits 0 7-bit data Absent 1 1 1 0 1 1 -- -- -- 0 -- 1 -- 0 -- 1 -- -- 1 bit 2 bits Present 1 0 1 bit 1 bit 2 bits Asyn8-bit data chronous mode (multiprocessor 7-bit data format) Present Absent 1 bit 2 bits 1 bit 2 bits Synchronous mode 8-bit data Absent None Table 12.9 SMR and SCR Settings and SCI Clock Source Selection SMR SCR Setting SCI Transmit/Receive clock Bit 7 C/A Bit 1 Bit 0 CKE1 CKE0 Mode Clock Source SCK Pin Function 0 0 Internal 0 1 1 Asynchronous mode 0 Outputs clock with frequency matching the bit rate External Inputs clock with frequency 16 times the bit rate Internal Outputs the serial clock External Inputs the serial clock 1 1 0 0 1 1 0 1 340 Synchronous mode SCI does not use the SCK pin 12.3.2 Operation in Asynchronous Mode In asynchronous mode, each transmitted or received character begins with a start bit and ends with one or two stop bits. Serial communication is synchronized one character at a time. The transmitting and receiving sections of the SCI are independent, so full-duplex communication is possible. The transmitter and the receiver are both double-buffered, so data can be written and read while transmitting and receiving are in progress, enabling continuous transmitting and receiving. Figure 12.2 shows the general format of asynchronous serial communication. In asynchronous serial communication the communication line is normally held in the mark (high) state. The SCI monitors the line and starts serial communication when the line goes to the space (low) state, indicating a start bit. One serial character consists of a start bit (low), data (LSB first), parity bit (high or low), and one or two stop bits (high), in that order. When receiving in asynchronous mode, the SCI synchronizes at the falling edge of the start bit. The SCI samples each data bit on the eighth pulse of a clock with a frequency 16 times the bit rate. Receive data is latched at the center of each bit. Idle (mark) state (LSB) 1 Serial data 0 Start bit 1 bit D0 1 (MSB) D1 D2 D3 D4 D5 D6 Transmit or receive data 7 or 8 bits One unit of data (character or frame) D7 0/1 Parity bit 1 bit, or none 1 1 Stop bit(s) 1 or 2 bits Figure 12.2 Data Format in Asynchronous Communication (Example: 8-Bit Data with Parity and 2 Stop Bits) Communication Formats: Table 12.10 shows the 12 communication formats that can be selected in asynchronous mode. The format is selected by settings in SMR. 341 Table 12.10 Serial Communication Formats (Asynchronous Mode) Serial Communication Format and Frame Length SMR Settings CHR PE MP STOP 1 0 0 0 0 S 8-bit data STOP 0 0 0 1 S 8-bit data STOP STOP 0 1 0 0 S 8-bit data P STOP 0 1 0 1 S 8-bit data P STOP STOP 1 0 0 0 S 7-bit data 1 0 0 1 S 7-bit data STOP STOP 1 1 0 0 S 7-bit data P STOP 1 1 0 1 S 7-bit data P STOP STOP 0 -- 1 0 S 8-bit data MPB STOP 0 -- 1 1 S 8-bit data MPB STOP STOP 1 -- 1 0 S 7-bit data MPB STOP 1 -- 1 1 S 7-bit data MPB STOP STOP Legend: S: Start bit STOP: Stop bit P: Parity bit MPB: Multiprocessor bit 342 2 3 4 5 6 7 8 9 10 11 12 STOP Clock: An internal clock generated by the on-chip baud rate generator or an external clock input from the SCK pin can be selected as the SCI transmit/receive clock. The clock source is selected by the C/A bit in SMR and bits CKE1 and CKE0 in SCR. For details of SCI clock source selection, see table 12.9. When an external clock is input at the SCK pin, it must have a frequency 16 times the desired bit rate. When the SCI is operated on an internal clock, it can output a clock signal at the SCK pin. The frequency of this output clock is equal to the bit rate. The phase is aligned as shown in figure 12.3 so that the rising edge of the clock occurs at the center of each transmit data bit. 0 D0 D1 D2 D3 D4 D5 D6 D7 0/1 1 1 1frame Figure 12.3 Phase Relationship between Output Clock and Serial Data (Asynchronous Mode) Transmitting and Receiving Data: * SCI Initialization (Asynchronous Mode): Before transmitting or receiving data, clear the TE and RE bits to 0 in SCR, then initialize the SCI as follows. When changing the communication mode or format, always clear the TE and RE bits to 0 before following the procedure given below. Clearing TE to 0 sets the TDRE flag to 1 and initializes TSR. Clearing RE to 0, however, does not initialize the RDRF, PER, FER, and ORER flags, or RDR, which retain their previous contents. When an external clock is used the clock should not be stopped during initialization or subsequent operation, since operation will be unreliable in this case. 343 Figure 12.4 shows a sample flowchart for initializing the SCI. Start of initialization Clear TE and RE bits to 0 in SCR Set CKE1 and CKE0 bits in SCR (leaving TE and RE bits cleared to 0) (1) (1) Set the clock source in SCR. Clear the RIE, TIE, TEIE, MPIE, TE, and RE bits to 0. If clock output is selected in asynchronous mode, clock output starts immediately after the setting is made in SCR. (2) Select the communication format in SMR. Select communication format in SMR (2) Set value in BRR (3) Wait No 1-bit interval elapsed? Yes Set TE or RE bit to 1 in SCR Set the RIE, TIE, TEIE, and MPIE bits (4) (3) Write the value corresponding to the bit rate in BRR. This step is not necessary when an external clock is used. (4) Wait for at least the interval required to transmit or receive one bit, then set the TE or RE bit to 1 in SCR. Set the RIE, TIE, TEIE, and MPIE bits as necessary. Setting the TE or RE bit enables the SCI to use the TxD or RxD pin. <End of initialization> Figure 12.4 Sample Flowchart for SCI Initialization 344 * Transmitting Serial Data (Asynchronous Mode): Figure 12.5 shows a sample flowchart for transmitting serial data and indicates the procedure to follow. (1) Initialize Start transmitting (2) Read TDRE flag in SSR (2) SCI status check and transmit data write: read SSR and check that the TDRE flag is set to 1, then write transmit data in TDR and clear the TDRE flag to 0. No TDRE= 1 (1) SCI initialization: the transmit data output function of the TxD pin is selected automatically. After the TE bit is set to 1, one frame of 1s is output, then transmission is possible. Yes Write transmit data in TDR and clear TDRE flag to 0 in SSR (3) To continue transmitting serial data: after checking that the TDRE flag is 1, indicating that data can be written, write data in TDR, then clear the TDRE flag to 0. No All data transmitted? Yes (3) Read TEND flag in SSR TEND= 1 No (4) To output a break signal at the end of serial transmission: set the DDR bit to 1 and clear the DR bit to 0, then clear the TE bit to 0 in SCR. Yes Output break signal? No (4) Yes Clear DR bit to 0 and set DDR bit to 1 Clear TE bit to 0 in SCR <End> Figure 12.5 Sample Flowchart for Transmitting Serial Data 345 In transmitting serial data, the SCI operates as follows: * The SCI monitors the TDRE flag in SSR. When the TDRE flag is cleared to 0, the SCI recognizes that TDR contains new data, and loads this data from TDR into TSR. * After loading the data from TDR to TSR, the SCI sets the TDRE flag to 1 and starts transmitting. If the TIE bit is set to 1 in SCR, the SCI requests a transmit-data-empty interrupt (TXI) at this time. Serial transmit data is transmitted in the following order from the TxD pin: Start bit: One 0 bit is output. Transmit data: 7 or 8 bits are output, LSB first. Parity bit or multiprocessor bit: One parity bit (even or odd parity),or one multiprocessor bit is output. Formats in which neither a parity bit nor a multiprocessor bit is output can also be selected. Stop bit(s): One or two 1 bits (stop bits) are output. Mark state: Output of 1 bits continues until the start bit of the next transmit data. * The SCI checks the TDRE flag when it outputs the stop bit. If the TDRE flag is 0, the SCI loads new data from TDR into TSR, outputs the stop bit, then begins serial transmission of the next frame. If the TDRE flag is 1, the SCI sets the TEND flag to 1 in SSR, outputs the stop bit, then continues output of 1 bits in the mark state. If the TEIE bit is set to 1 in SCR, a transmit-end interrupt (TEI) is requested at this time Figure 12.6 shows an example of SCI transmit operation in asynchronous mode. 1 0 Parity Stop Start bit bit bit Data Start bit D0 D1 D7 0/1 1 0 Parity Stop bit bit Data D0 D1 D7 0/1 1 Idle state (mark state) TDRE TEND 1 frame TXI interrupt request TXI interrupt handler writes data in TDR and clears TDRE flag to 0 TXI interrupt request TEI interrupt request Figure 12.6 Example of SCI Transmit Operation in Asynchronous Mode (8-Bit Data with Parity and One Stop Bit) 346 1 * Receiving Serial Data (Asynchronous Mode): Figure 12.7 shows a sample flowchart for receiving serial data and indicates the procedure to follow. (1) Initialize Start receiving Read ORER, PER, and FER flags in SSR (2) Yes PERFEROPER= 1 (3) Error handling No (1) SCI initialization: the receive data input function of the RxD pin is selected automatically. (2)(3) Receive error handling and break detection: if a receive error occurs, read the ORER, PER, and FER flags in SSR to identify the error. After executing the necessary error handling, clear the ORER, PER, and FER flags all to 0. Receiving cannot resume if any of these flags remains set to 1. When a framing error occurs, the RxD pin can be read to detect the break state. (continued on next page) Read RDRF flag in SSR No (4) (4) SCI status check and receive data read: read SSR, check that the RDRF flag is set to 1, then read receive data from RDR and clear the RDRF flag to 0. Notification that the RDRF flag has changed from 0 to 1 can also be given by the RXI interrupt. (5) To continue receiving serial data: check the RDRF flag, read RDR, and clear the RDRF flag to 0 before the stop bit of the current frame is received. RDRF= 1 Yes Read receive data from RDR, and clear RDRF flag to 0 in SSR No All data received? (5) Yes Clear RE bit to 0 in SCR <End> Figure 12.7 Sample Flowchart for Receiving Serial Data 347 (3) Error handling No ORER= 1 Yes Overrun error handling No FER= 1 Yes Break? Yes No Framing error handling No Clear RE bit to 0 in SCR PER= 1 Yes Parity error handling Clear ORER, PER, and FER flags to 0 in SSR <End> Figure 12.7 Sample Flowchart for Receiving Serial Data (cont) 348 In receiving, the SCI operates as follows: * The SCI monitors the communication line. When it detects a start bit (0 bit), the SCI synchronizes internally and starts receiving. * Receive data is stored in RSR in order from LSB to MSB. * The parity bit and stop bit are received. After receiving these bits, the SCI carries out the following checks: Parity check: The number of 1s in the receive data must match the even or odd parity setting of in the O/E bit in SMR. Stop bit check: The stop bit value must be 1. If there are two stop bits, only the first is checked. Status check: The RDRF flag must be 0, indicating that the receive data can be transferred from RSR into RDR. If these all checks pass, the RDRF flag is set to 1 and the received data is stored in RDR. If one of the checks fails (receive error*), the SCI operates as shown in table 12.11. Note: * When a receive error occurs, further receiving is disabled. In receiving, the RDRF flag is not set to 1. Be sure to clear the error flags to 0. * When the RDRF flag is set to 1, if the RIE bit is set to 1 in SCR, a receive-data-full interrupt (RXI) is requested. If the ORER, PER, or FER flag is set to 1 and the RIE bit in SCR is also set to 1, a receive-error interrupt (ERI) is requested. Table 12.11 Receive Error Conditions Receive Error Abbreviation Condition Data Transfer Overrun error ORER Receiving of next data ends while Receive data is not transferred RDRF flag is still set to 1 in SSR from RSR to RDR Framing error FER Stop bit is 0 Parity error Parity of received data differs from Receive data is transferred from even/odd parity setting in SMR RSR to RDR PER Receive data is transferred from RSR to RDR 349 Figure 12.8 shows an example of SCI receive operation in asynchronous mode. 1 Start bit 0 Parity Stop bit bit Data D0 D1 D7 0/1 1 Start bit 0 Parity Stop bit bit Data D0 D1 D7 0/1 1 1 Idle (mark) state RDRF FER RXI interrupt request 1 frame RXI interrupt handler reads data in RDR and clears RDRF flag to 0 Framing error, ERI interrupt request Figure 12.8 Example of SCI Receive Operation (8-Bit Data with Parity and One Stop Bit) 12.3.3 Multiprocessor Communication The multiprocessor communication function enables several processors to share a single serial communication line. The processors communicate in asynchronous mode using a format with an additional multiprocessor bit (multiprocessor format). In multiprocessor communication, each receiving processor is addressed by an ID. A serial communication cycle consists of an ID-sending cycle that identifies the receiving processor, and a data-sending cycle. The multiprocessor bit distinguishes ID-sending cycles from data-sending cycles. The transmitting processor starts by sending the ID of the receiving processor with which it wants to communicate as data with the multiprocessor bit set to 1. Next the transmitting processor sends transmit data with the multiprocessor bit cleared to 0. Receiving processors skip incoming data until they receive data with the multiprocessor bit set to 1. When they receive data with the multiprocessor bit set to 1, receiving processors compare the data with their IDs. Processors with IDs not matching the received data skip further incoming data until they again receive data with the multiprocessor bit set to 1. Multiple processors can send and receive data in this way. Figure 12.9 shows an example of communication among different processors using a multiprocessor format. 350 Communication Formats: Four formats are available. Parity bit settings are ignored when a multiprocessor format is selected. For details see table 12.10. Clock: See the description of asynchronous mode. Transmitting processor Serial communication line Serial data Receiving processor A Receiving processor B Receiving processor C Receiving processor D (ID=01) (ID=02) (ID=03) (ID=04) H'01 H'AA (MPB=1) ID-sending cycle: receiving processor address (MPB=0) Data-sending cycle: data sent to receiving processor specified by ID Legend MPB : Multiprocessor bit Figure 12.9 Example of Communication among Processors using Multiprocessor Format (Sending Data H'AA to Receiving Processor A) Transmitting and Receiving Data: * Transmitting Multiprocessor Serial Data: Figure 12.10 shows a sample flowchart for transmitting multiprocessor serial data and indicates the procedure to follow. 351 (1) Initialize Start transmitting Read TDRE flag in SSR TDRE= 1 (2) No (2) SCI status check and transmit data write: read SSR, check that the TDRE flag is 1, then write transmit data in TDR. Also set the MPBT flag to 0 or 1 in SSR. Finally, clear the TDRE flag to 0. (3) To continue transmitting serial data: after checking that the TDRE flag is 1, indicating that data can be written, write data in TDR, then clear the TDRE flag to 0. Yes Write transmit data in TDR and set MPBT bit in SSR Clear TDRE flag to 0 All data transmitted? (1) SCI initialization: the transmit data output function of the TxD pin is selected automatically. No (3) (4) To output a break signal at the end of serial transmission: set the DDR bit to 1 and clear the DR bit to 0, then clear the TE bit to 0 in SCR. Yes Read TEND flag in SSR TEND= 1 No Yes Output break signal? No (4) Yes Clear DR bit to 0 and set DDR to 1 Clear TE bit to 0 in SCR <End> Figure 12.10 Sample Flowchart for Transmitting Multiprocessor Serial Data 352 In transmitting serial data, the SCI operates as follows: * The SCI monitors the TDRE flag in SSR. When the TDRE flag is cleared to 0, the SCI recognizes that TDR contains new data, and loads this data from TDR into TSR. * After loading the data from TDR to TSR, the SCI sets the TDRE flag to 1 and starts transmitting. If the TIE bit is set to 1 in SCR, the SCI requests a transmit-data-empty interrupt (TXI) at this time. Serial transmit data is transmitted in the following order from the TxD pin: Start bit: One 0 bit is output. Transmit data: 7 or 8 bits are output, LSB first. Multiprocessor bit: One multiprocessor bit (MPBT value) is output. Stop bit(s): One or two 1 bits (stop bits) are output. Mark state: Output of 1 bits continues until the start bit of the next transmit data. * The SCI checks the TDRE flag when it outputs the stop bit. If the TDRE flag is 0, the SCI loads new data from TDR into TSR, outputs the stop bit, then begins serial transmission of the next frame. If the TDRE flag is 1, the SCI sets the TEND flag to 1 in SSR, outputs the stop bit, then continues output of 1 bits in the mark state. If the TEIE bit is set to 1 in SCR, a transmit-end interrupt (TEI) is requested at this time Figure 12.11 shows an example of SCI transmit operation using a multiprocessor format. 1 Start bit 0 Data D0 D1 Multiprocessor Stop Start bit bit bit D7 0/1 1 0 Data D0 D1 Multiprocessor Stop bit bit D7 0/1 1 Idle (mark) state TDRE TEND TXI interrupt TXI interrupt handler writes data in TDR and request clears TDRE flag to 0 TXI interrupt request TEI interrupt request 1 frame Figure 12.11 Example of SCI Transmit Operation (8-Bit Data with Multiprocessor Bit and One Stop Bit) * Receiving Multiprocessor Serial Data: Figure 12.12 shows a sample flowchart for receiving multiprocessor serial data and indicates the procedure to follow. 353 (1) Initialize (1) SCI initialization: the receive data input function of the RxD pin is selected automatically. Start receiving (2) ID receive cycle: set the MPIE bit to 1 in SCR. (2) Set MPIE bit to 1 in SCR (3) SCI status check and ID check: read SSR, check that the RDRF flag is set to 1, then read data from RDR and compare it with the processor's own ID. If the ID does not match, set the MPIE bit to 1 again and clear the RDRF flag to 0. If the ID matches, clear the RDRF flag to 0. Read ORER and FER flags in SSR FERORER= 1 Yes No Read RDRF flag in SSR No (3) (4) SCI status check and data receiving: read SSR, check that the RDRF flag is set to 1, then read data from RDR. RDRF= 1 (5) Receive error handling and break detection: if a receive error occurs, read the ORER and FER flags in SSR to identify the error. After executing the necessary error handling, clear the ORER and FER flags both to 0. Receiving cannot resume while either the ORER or FER flag remains set to 1. When a framing error occurs, the RxD pin can be read to detect the break state. Yes Read RDRF flag in SSR No Own ID? Yes Read ORER and FER flags in SSR FERORER= 1 Yes No (4) Read RDRF flag in SSR RDRF= 1 No Yes Read receive data from RDR No Finished receiving? Yes Clear RE bit to 0 in SCR (5) Error handling (continued on next page) <End> Figure 12.12 Sample Flowchart for Receiving Multiprocessor Serial Data 354 (5) Error handling No ORER= 1 Yes Overrun error handling No FER= 1 Yes Break? Yes No Clear RE bit to 0 in SCR Framing error handling Clear ORER, PER, and FER flags to 0 in SSR <End> Figure 12.12 Sample Flowchart for Receiving Multiprocessor Serial Data (cont) 355 Figure 12.13 shows an example of SCI receive operation using a multiprocessor format. 1 Start bit 0 Stop MPB bit Data (ID1) D0 D1 D7 Start bit 0 1 1 Stop MPB bit Data (data1) D0 D1 D7 1 0 1 Idle (mark) state MPIE RDRF RDR value ID1 MPB detection MPIE = 0 RXI interrupt request (multiprocessor interrupt) RXI interrupt handler reads RDR data and clears RDRF flag to 0 Not own ID, so MPIE bit is set to 1 again No RXI interrupt request, RDR not updated a. Own ID does not match data 1 Start bit 0 Data (ID2) D0 D1 MPB D7 1 Stop bit Start bit Data (data2) 1 0 D0 D1 Stop bit MPB D7 0 1 1 Idle (mark) state MPIE RDRF RDR value MPB detection MPIE = 0 ID1 ID2 RXI interrupt request (multiprocessor interrupt) RXI interrupt handler reads RDR data and clears RDRF flag to 0 Own ID, so receiving MPIE bit is set to continues, with data 1 again received by RXI interrupt handler b. Own ID matches data Figure 12.13 Example of SCI Receive Operation (8-Bit Data with Multiprocessor Bit and One Stop Bit) 356 Data2 12.3.4 Synchronous Operation In synchronous mode, the SCI transmits and receives data in synchronization with clock pulses. This mode is suitable for high-speed serial communication. The SCI transmitter and receiver share the same clock but are otherwise independent, so fullduplex communication is possible. The transmitter and the receiver are also double-buffered, so continuous transmitting or receiving is possible by reading or writing data while transmitting or receiving is in progress. Figure 12.14 shows the general format in synchronous serial communication. One unit (character or frame) of transfer data * * Serial clock L SB Bit 0 Serial data MSB Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Don't care Don't care Note: * High except in continuous transmitting or receiving Figure 12.14 Data Format in Synchronous Communication In synchronous serial communication, each data bit is placed on the communication line from one falling edge of the serial clock to the next. Data is guaranteed valid at the rise of the serial clock. In each character, the serial data bits are transferred in order from LSB (first) to MSB (last). After output of the MSB, the communication line remains in the state of the MSB. In synchronous mode the SCI receives data by synchronizing with the rise of the serial clock. Communication Format: The data length is fixed at 8 bits. No parity bit or multiprocessor bit can be added. Clock: An internal clock generated by the on-chip baud rate generator or an external clock input from the SCK pin can be selected by means of the C/A bit in SMR and the CKE1 and CKE0 bits in SCR. See table 12.6 for details of SCI clock source selection. When the SCI operates on an internal clock, it outputs the clock source at the SCK pin. Eight clock pulses are output per transmitted or received character. When the SCI is not transmitting or receiving, the clock signal remains in the high state. If receiving in single-character units is required, an external clock should be selected. 357 Transmitting and Receiving Data: * SCI Initialization (Synchronous Mode): Before transmitting or receiving data, clear the TE and RE bits to 0 in SCR, then initialize the SCI as follows. When changing the communication mode or format, always clear the TE and RE bits to 0 before following the procedure given below. Clearing TE to 0 sets the TDRE flag to 1 and initializes TSR. Clearing RE to 0, however, does not initialize the RDRF, PER, FER, and ORER flags, or RDR, which retain their previous contents. Figure 12.15 shows a sample flowchart for initializing the SCI. Start of initialization (1) Set the clock source in SCR. Clear the RIE, TIE, TEIE, MPIE, TE, and RE bits to 0.* Clear TE and RE bits to 0 in SCR Set RIE, TIE, MPIE, CKE1 and CKE0 bits in SCR (leaving TE and (1) RE bits cleared to 0) Select communication format in SMR Set value in BRR Wait 1-bit interval elapsed? (2) Set the communication format in SMR. (3) Write the value corresponding to the bit rate in BRR. This step is not necessary when an external clock is used. (2) (3) Yes (4) Wait for at least the interval required to transmit or receive one bit, then set the TE or RE bit to 1 in SCR.* Set the RIE, TIE, TEIE, and MPIE bits as necessary. Setting the TE or RE bit enables the SCI to use the TxD or RxD pin. Yes Set TE or RE bit to 1 in SCR Set RIE, TIE, TEIE, and MPIE bits as necessary (4) <Start transmitting or receiving> Note: * In simultaneous transmitting and receiving, the TE and RE bits should be cleared to 0 or set to 1 simultaneously. Figure 12.15 Sample Flowchart for SCI Initialization 358 * Transmitting Serial Data (Synchronous Mode): Figure 12.16 shows a sample flowchart for transmitting serial data and indicates the procedure to follow. (1) Initialize Start transmitting Read TDRE flag in SSR TDRE= 1 (2) No Write transmit data in TDR and clear TDRE flag to 0 in SSR No (2) SCI status check and transmit data write: read SSR, check that the TDRE flag is 1, then write transmit data in TDR and clear the TDRE flag to 0. (3) To continue transmitting serial data: after checking that the TDRE flag is 1, indicating that data can be written, write data in TDR, then clear the TDRE flag to 0. Yes All data transmitted? (1) SCI initialization: the transmit data output function of the TxD pin is selected automatically. (3) Yes Read TEND flag in SSR No TEND= 1 Yes Clear TE bit to 0 in SCR <End> Figure 12.16 Sample Flowchart for Serial Transmitting 359 In transmitting serial data, the SCI operates as follows. * The SCI monitors the TDRE flag in SSR. When the TDRE flag is cleared to 0, the SCI recognizes that TDR contains new data, and loads this data from TDR into TSR. * After loading the data from TDR to TSR, the SCI sets the TDRE flag to 1 and starts transmitting. If the TIE bit is set to 1 in SCR, the SCI requests a transmit-data-empty interrupt (TXI) at this time. If clock output is selected, the SCI outputs eight serial clock pulses. If an external clock source is selected, the SCI outputs data in synchronization with the input clock. Data is output from the TxD pin in order from LSB (bit 0) to MSB (bit 7). * The SCI checks the TDRE flag when it outputs the MSB (bit 7). If the TDRE flag is 0, the SCI loads data from TDR into TSR and begins serial transmission of the next frame. If the TDRE flag is 1, the SCI sets the TEND flag to 1 in SSR, and after transmitting the MSB, holds the TxD pin in the MSB state. If the TEIE bit is set to 1 in SCR, a transmit-end interrupt (TEI) is requested at this time * After the end of serial transmission, the SCK pin is held in a constant state. Figure 12.17 shows an example of SCI transmit operation. Transmit direction Serial clock Serial data Bit 0 Bit 1 Bit 7 Bit 0 Bit 1 Bit 6 Bit 7 TDRE TEND TXI interrupt request TXI interrupt handler TXI interrupt request writes data in TDR and clears TDRE flag to 0 TEI interrupt request 1 frame Figure 12.17 Example of SCI Transmit Operation * Receiving Serial Data (Synchronous Mode): Figure 12.18 shows a sample flowchart for receiving serial data and indicates the procedure to follow. When switching from asynchronous to synchronous mode. make sure that the ORER, PER, and FER flags are cleared to 0. If the FER or PER flag is set to 1 the RDRF flag will not be set and both transmitting and receiving will be disabled. 360 (1) Initialize (1) Start receiving Read ORER flag in SSR (2) Yes ORER= 1 (3) No Error handling (2)(3) Receive error handling: if a receive error occurs, read the ORER flag in SSR, then after executing the necessary error handling, clear the ORER flag to 0. Neither transmitting nor receiving can resume while the ORER flag remains set to 1. (4) SCI status check and receive data read: read SSR, check that the RDRF flag is set to 1, then read receive data from RDR and clear the RDRF flag to 0. Notification that the RDRF flag has changed from 0 to 1 can also be given by the RXI interrupt. (5) To continue receiving serial data: check the RDRF flag, read RDR, and clear the RDRF flag to 0 before the MSB (bit 7) of the current frame is received. (continued on next page) Read RDRF flag in SSR No (4) RDRF= 1 Yes Read receive data from RDR, and clear RDRF flag to 0 in SSR No Finished receiving? SCI initialization: the receive data input function of the RxD pin is selected automatically. (5) Yes Clear RE bit to 0 in SCR <End> Figure 12.18 Sample Flowchart for Serial Receiving 361 (3) Error handling Overrun error handling Clear ORER flag to 0 in SSR <End> Figure 12.18 Sample Flowchart for Serial Receiving (cont) In receiving, the SCI operates as follows: * The SCI synchronizes with serial clock input or output and synchronizes internally. * Receive data is stored in RSR in order from LSB to MSB. After receiving the data, the SCI checks that the RDRF flag is 0, so that receive data can be transferred from RSR to RDR. If this check passes, the RDRF flag is set to 1 and the received data is stored in RDR. If the checks fails (receive error), the SCI operates as shown in table 12.11. When a receive error has been identified in the error check, subsequent transmit and receive operations are disabled. * When the RDRF flag is set to 1, if the RIE bit is set to 1 in SCR, a receive-data-full interrupt (RXI) is requested. If the ORER flag is set to 1 and the RIE bit in SCR is also set to 1, a receive-error interrupt (ERI) is requested. 362 Figure 12.19 shows an example of SCI receive operation. Serial clock Serial data Bit 7 Bit 0 Bit 7 Bit 0 Bit 1 Bit 6 Bit 7 RDRF ORER RXI interrupt request RXI interrupt handler reads data in RDR and clears RDRF flag to 0 RXI interrupt request Overrun error, ERI interrupt request 1 frame Figure 12.19 Example of SCI Receive Operation 363 * Transmitting and Receiving Data Simultaneously (Synchronous Mode): Figure 12.20 shows a sample flowchart for transmitting and receiving serial data simultaneously and indicates the procedure to follow. Initialize (1) SCI initialization: the transmit data output function of the TxD pin and the read data input function of the TxD pin are selected, enabling simultaneous transmitting and receiving. (1) Start of transmitting and receiving Read TDRE flag in SSR No (2) SCI status check and transmit data write: read SSR, check that the TDRE flag is 1, then write transmit data in TDR and clear the TDRE flag to 0. Notification that the TDRE flag has changed from 0 to 1 can also be given by the TXI interrupt. (2) TDRE= 1 (3) Receive error handling: if a receive error occurs, read the ORER flag in SSR, then after executing the necessary error handling, clear the ORER flag to 0. Neither transmitting nor receiving can resume while the ORER flag remains set to 1. Yes Write transmit data in TDR and clear TDRE flag to 0 in SSR (4) SCI status check and receive data read: read SSR, check that the RDRF flag is 1, then read receive data from RDR and clear the RDRF flag to 0. Notification that the RDRF flag has changed from 0 to 1 can also be given by the RXI interrupt. Read ORER flag in SSR ORER= 1 Yes (3) No Error handling Read RDRF flag in SSR No (4) (5) To continue transmitting and receiving serial data: check the RDRF flag, read RDR, and clear the RDRF flag to 0 before the MSB (bit 7) of the current frame is received. Also check that the TDRE flag is set to 1, indicating that data can be written, write data in TDR, then clear the TDRE flag to 0 before the MSB (bit 7) of the current frame is transmitted. RDRF= 1 Yes Read receive data from RDR, and clear RDRF flag to 0 in SSR No End of transmitting and receiving? (5) Yes Clear TE and RE bits to 0 in SCR <End> Note: When switching from transmitting or receiving to simultaneous transmitting and receiving, clear both the TE bit and the RE bit to 0, then set both bits to 1 simultaneously. Figure 12.20 Sample Flowchart for Simultaneous Serial Transmitting and Receiving 364 12.4 SCI Interrupts The SCI has four interrupt request sources: transmit-end interrupt (TEI), receive-error (ERI), receive-data-full (RXI), and transmit-data-empty interrupt (TXI). Table 12.12 lists the interrupt sources and indicates their priority. These interrupts can be enabled or disabled by the TIE, RIE, and TEIE bits in SCR. Each interrupt request is sent separately to the interrupt controller. A TXI interrupt is requested when the TDRE flag is set to 1 in SSR. A TEI interrupt is requested when the TEND flag is set to 1 in SSR. An RXI interrupt is requested when the RDRF flag is set to 1 in SSR. An ERI interrupt is requested when the ORER, PER, or FER flag is set to 1 in SSR. Table 12.12 SCI Interrupt Sources Interrupt Source Description Priority ERI Receive error (ORER, FER, or PER) High RXI Receive data register full (RDRF) TXI Transmit data register empty (TDRE) TEI Transmit end (TEND) Low 365 12.5 Usage Notes 12.5.1 Notes on Use of SCI Note the following points when using the SCI. TDR Write and TDRE Flag: The TDRE flag in SSR is a status flag indicating the loading of transmit data from TDR to TSR. The SCI sets the TDRE flag to 1 when it transfers data from TDR to TSR. Data can be written into TDR regardless of the state of the TDRE flag. If new data is written in TDR when the TDRE flag is 0, the old data stored in TDR will be lost because this data has not yet been transferred to TSR. Before writing transmit data in TDR, be sure to check that the TDRE flag is set to 1. Simultaneous Multiple Receive Errors: Table 12.13 shows the state of the SSR status flags when multiple receive errors occur simultaneously. When an overrun error occurs the RSR contents are not transferred to RDR, so receive data is lost. Table 12.13 SSR Status Flags and Transfer of Receive Data RDRF ORER FER PER Receive Data Transfer RSR RDR 1 1 0 0 x 0 0 1 0 Framing error 0 0 0 1 Parity error 1 1 1 0 x Overrun error + framing error 1 1 0 1 x Overrun error + parity error 0 0 1 1 1 1 1 1 SSR Status Flags Note: 366 : Receive data is transferred from RSR to RDR. x : Receive data is not transferred from RSR to RDR. Receive Errors Overrun error Framing error + parity error x Overrun error + framing error + parity error Break Detection and Processing: Break signals can be detected by reading the RxD pin directly when a framing error (FER) is detected. In the break state the input from the RxD pin consists of all 0s, so the FER flag is set and the parity error flag (PER) may also be set. In the break state the SCI receiver continues to operate, so if the FER flag is cleared to 0 it will be set to 1 again. Sending a Break Signal: The input/output condition and level of the TxD pin are determined by DR and DDR bits. This feature can be used to send a break signal. After the serial transmitter is initialized, the DR value substitutes for the mark state until the TE bit is set to 1 (the TxD pin function is not selected until the TE bit is set to 1). The DDR and DR bits should therefore be set to 1 beforehand. To send a break signal during serial transmission, clear the DR bit to 0 , then clear the TE bit to 0. When the TE bit is cleared to 0 the transmitter is initialized, regardless of its current state, so the TxD pin becomes an input/output outputting the value 0. Receive Error Flags and Transmitter Operation (Synchronous Mode Only): When a receive error flag (ORER, PER, or FER) is set to 1 the SCI will not start transmitting, even if the TDRE flag is cleared to 0. Be sure to clear the receive error flags to 0 when starting to transmit. Note that clearing the RE bit to 0 does not clear the receive error flags to 0. Receive Data Sampling Timing in Asynchronous Mode and Receive Margin: In asynchronous mode the SCI operates on a base clock with 16 times the bit rate frequency. In receiving, the SCI synchronizes internally with the fall of the start bit, which it samples on the base clock. Receive data is latched at the rising edge of the eighth base clock pulse. See figure 12.21. 16 clocks 8 clocks 0 7 15 0 7 15 0 Internal base clock Receive data (RxD) Start bit D0 D1 Synchronization sampling timing Data sampling timing Figure 12.21 Receive Data Sampling Timing in Asynchronous Mode 367 The receive margin in asynchronous mode can therefore be expressed as shown in equation (1). M = (0.5 - 1 ) - (L - 0.5) F - D - 0.5 2N M: N: D: L: F: (1 + F) x 100% . . . . . . . . (1) N Receive margin (%) Ratio of clock frequency to bit rate (N = 16) Clock duty cycle (D = 0 to 1.0) Frame length (L = 9 to 12) Absolute deviation of clock frequency From equation (1), if F = 0 and D = 0.5, the receive margin is 46.875%, as given by equation (2). When D = 0.5 and F = 0: M = (0.5 - 1 2 x 16 = 46.875% ) x 100% . . . . . . . . (2) This is a theoretical value. A reasonable margin to allow in system designs is 20% to 30%. Restrictions on Use of an External Clock Source: * When an external clock source is used for the serial clock, after updates TDR, allow an inversion of at least five system clock () cycles before input of the serial clock to start transmitting. If the serial clock is input within four states of the TDR update, a malfunction may occur. (See figure 12.22) SCK t TDRE D0 D1 D2 D3 D4 D5 Note: In operation with an external clock source, be sure that t >4 states. Figure 12.22 Example of Synchronous Transmission 368 D6 D7 Switching from SCK Pin Function to Port Pin Function: * Problem in Operation: When switching the SCK pin function to the output port function (highlevel output) by making the following settings while DDR = 1, DR = 1, C/A = 1, CKE1 = 0, CKE0 = 0, and TE = 1 (synchronous mode), low-level output occurs for one half-cycle. 1. End of serial data transmission 2. TE bit = 0 3. C/A bit = 0 ... switchover to port output 4. Occurrence of low-level output (see figure 12.23) Half-cycle low-level output SCK/port 1. End of transmission Data Bit 6 4. Low-level output Bit 7 2.TE= 0 TE C/A 3.C/A= 0 CKE1 CKE0 Figure 12.23 Operation when Switching from SCK Pin Function to Port Pin Function 369 * Sample Procedure for Avoiding Low-Level Output: As this sample procedure temporarily places the SCK pin in the input state, the SCK/port pin should be pulled up beforehand with an external circuit. With DDR = 1, DR = 1, C/A = 1, CKE1 = 0, CKE0 = 0, and TE = 1, make the following settings in the order shown. 1. End of serial data transmission 2. TE bit = 0 3. CKE1 bit = 1 4. C/A bit = 0 ... switchover to port output 5. CKE1 bit = 0 High-level outputTE SCK/port 1. End of transmission Data Bit 6 Bit 7 2.TE= 0 TE 4.C/A= 0 C/A 3.CKE1= 1 CKE1 5.CKE1= 0 CKE0 Figure 12.24 Operation when Switching from SCK Pin Function to Port Pin Function (Example of Preventing Low-Level Output) 370 Section 13 Smart Card Interface 13.1 Overview The SCI supports an IC card (smart card) interface handling ISO/IEC7816-3 (Identification Card) character transmission as a serial communication interface expansion function. Switchover between the normal serial communication interface and the smart card interface is controlled by a register setting. 13.1.1 Features Features of the smart card interface supported by the H8/3008 are listed below. * Asynchronous communication Data length: 8 bits Parity bit generation and checking Transmission of error signal (parity error) in receive mode Error signal detection and automatic data retransmission in transmit mode Direct convention and inverse convention both supported * Built-in baud rate generator allows any bit rate to be selected * Three interrupt sources There are three interrupt sources--transmit-data-empty, receive-data-full, and transmit/receive error--that can issue requests independently. 371 13.1.2 Block Diagram Bus interface Figure 13.1 shows a block diagram of the smart card interface. Module data bus RxD RDR TDR RSR TSR TxD SCMR SSR SCR SMR Transmission/ reception control Parity generation BRR /4 Baud rate generator /16 /64 Clock Parity check External clock SCK Legend SCMR: RSR: RDR: TSR: TDR: SMR: SCR: SSR: BRR: TXI RXI ERI Smart card mode register Receive shift register Receive data register Transmit shift register Transmit data register Serial mode register Serial control register Serial status register Bit rate register Figure 13.1 Block Diagram of Smart Card Interface 13.1.3 Pin Configuration Table 13.1 shows the smart card interface pins. Table 13.1 Smart Card Interface Pins Pin Name Abbreviation I/O Function Serial clock pin SCK I/O Clock input/output Receive data pin RxD Input Receive data input Transmit data pin TxD Output Transmit data output 372 Internal data bus 13.1.4 Register Configuration The smart card interface has the internal registers listed in table 13.2. The BRR, TDR, and RDR registers have their normal serial communication interface functions, as described in section 12, Serial Communication Interface. Table 13.2 Smart Card Interface Registers Channel Address* 1 Name Abbreviation R/W Initial Value 0 H'FFFB0 Serial mode register SMR R/W H'00 H'FFFB1 Bit rate register BRR R/W H'FF H'FFFB2 Serial control register SCR R/W H'00 H'FFFB3 Transmit data register TDR R/W 1 H'FF 2 H'FFFB4 Serial status register SSR R/(W)* H'84 H'FFFB5 Receive data register RDR R H'00 H'FFFB6 Smart card mode register SCMR R/W H'F2 H'FFFB8 Serial mode register SMR R/W H'00 H'FFFB9 Bit rate register BRR R/W H'FF H'FFFBA Serial control register SCR R/W H'00 H'FFFBB Transmit data register TDR R/W H'FF 2 H'FFFBC Serial status register SSR R/(W)* H'84 H'FFFBD Receive data register RDR R H'00 H'FFFBE Smart card mode register SCMR R/W H'F2 Notes: *1 Lower 20 bits of the address in advanced mode. *2 Only 0 can be written in bits 7 to 3, to clear the flags. 373 13.2 Register Descriptions This section describes the new or modified registers and bit functions in the smart card interface. 13.2.1 Smart Card Mode Register (SCMR) SCMR is an 8-bit readable/writable register that selects smart card interface functions. 7 6 5 4 3 2 1 0 -- -- -- -- SDIR SINV -- SMIF Initial value 1 1 1 1 0 0 1 0 Read/Write -- -- -- -- R/W R/W -- R/W Bit Reserved bits Reserved bit Smart card interface mode select Enables or disables the smart card interface function Smart card data invert Inverts data logic levels Smart card data transfer direction Selects the serial/parallel conversion format SCMR is initialized to H'F2 by a reset and in standby mode. Bits 7 to 4--Reserved: Read-only bits, always read as 1. Bit 3--Smart Card Data Transfer Direction (SDIR): Selects the serial/parallel conversion format.*1 Bit 3 SDIR Description 0 TDR contents are transmitted LSB-first Receive data is stored LSB-first in RDR 1 TDR contents are transmitted MSB-first Receive data is stored MSB-first in RDR 374 (Initial value) Bit 2--Smart Card Data Invert (SINV): Specifies inversion of the data logic level. This function is used in combination with the SDIR bit to communicate with inverse-convention cards.* 2 The SINV bit does not affect the logic level of the parity bit. For parity settings, see section 13.3.4, Register Settings. Bit 2 SINV Description 0 Unmodified TDR contents are transmitted (Initial value) Receive data is stored unmodified in RDR 1 Inverted TDR contents are transmitted Receive data is inverted before storage in RDR Bit 1--Reserved: Read-only bit, always read as 1. Bit 0--Smart Card Interface Mode Select (SMIF): Enables the smart card interface function. Bit 0 SMIF Description 0 Smart card interface function is disabled 1 Smart card interface function is enabled (Initial value) Notes: *1 The function for switching between LSB-first and MSB-first mode can also be used with the normal serial communication interface. Note that when the communication format data length is set to 7 bits and MSB-first mode is selected for the serial data to be transferred, bit 0 of TDR is not transmitted, and only bits 7 to 1 of the received data are valid. *2 The data logic level inversion function can also be used with the normal serial communication interface. Note that, when inverting the serial data to be transferred, parity transmission and parity checking is based on the number of high-level periods at the serial data I/O pin, and not on the register value. 375 13.2.2 Serial Status Register (SSR) The function of SSR bit 4 is modified in smart card interface mode. This change also causes a modification to the setting conditions for bit 2 (TEND). 7 6 5 4 3 2 1 0 TDRE RDRF ORER ERS PER TEND MPB MPBT Initial value 1 0 0 0 0 1 0 0 Read/Write R/(W)* R/(W)* R/(W)* R/(W)* R/(W)* R R R/W Bit Transmit end Status flag indicating end of transmission Error signal status (ERS) Status flag indicating that an error signal has been received Note: * Only 0 can be written, to clear the flag. Bits 7 to 5: These bits operate as in normal serial communication. For details see section 12.2.7, Serial Status Register (SSR). Bit 4--Error Signal Status (ERS): In smart card interface mode, this flag indicates the status of the error signal sent from the receiving device to the transmitting device. The smart card interface does not detection framing errors. Bit 4 ERS Description 0 Indicates normal transmission, with no error signal returned (Initial value) [Clearing conditions] 1 * The chip is reset, or enters standby mode or module stop mode * Software reads ERS while it is set to 1, then writes 0. Indicates that the receiving device sent an error signal reporting a parity error [Setting condition] A low error signal was sampled. Note: Clearing the TE bit to 0 in SCR does not affect the ERS flag, which retains its previous value. 376 Bits 3 to 0: These bits operate as in normal serial communication. For details see section 12.2.7, Serial Status Register (SSR). The setting conditions for transmit end (TEND), however, are modified as follows. Bit 2 TEND Description 0 Transmission is in progress [Clearing condition] Software reads TDRE while it is set to 1, then writes 0 in the TDRE flag. 1 End of transmission [Setting conditions] (Initial value) * The chip is reset or enters standby mode. * The TE bit and FER/ERS bit are both cleared to 0 in SCR. * TDRE is 1 and FER/ERS is 0 at a time 2.5 etu after the last bit of a 1-byte serial character is transmitted (normal transmission). Note: An etu (elementary time unit) is the time needed to transmit one bit. 13.2.3 Serial Mode Register (SMR) The function of SMR bit 7 is modified in smart card interface mode. This change also causes a modification to the function of bits 1 and 0 in the serial control register (SCR). Bit 7 6 5 4 3 2 1 0 GM CHR PE O/E STOP MP CKS1 CKS0 0 0 0 R/W R/W Initial value 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W Bit 7--GSM Mode (GM): With the normal smart card interface, this bit is cleared to 0. Setting this bit to 1 selects GSM mode, an additional mode for controlling the timing for setting the TEND flag that indicates completion of transmission, and the type of clock output used. The details of the additional clock output control mode are specified by the CKE1 and CKE0 bits in the serial control register (SCR). 377 Bit 7 GM Description 0 Normal smart card interface mode operation 1 * The TEND flag is set 12.5 etu after the beginning of the start bit. * Clock output on/off control only. (Initial value) GSM mode smart card interface mode operation * The TEND flag is set 11.0 etu after the beginning of the start bit. * Clock output on/off and fixed-high/fixed-low control. Bits 6 to 0: These bits operate as in normal serial communication. For details see section 12.2.5, Serial Mode Register (SMR). 13.2.4 Serial Control Register (SCR) The function of SCR bits 1 and 0 is modified in smart card interface mode. Bit 7 6 5 4 3 2 1 0 TIE RIE TE RE MPIE TEIE CKE1 CKE0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Bits 7 to 2: These bits operate as in normal serial communication. For details see section 12.2.6, Serial Control Register (SCR). Bits 1 and 0--Clock Enable 1 and 0 (CKE1, CKE0): These bits select the SCI clock source and enable or disable clock output from the SCK pin. In smart card interface mode, it is possible to specify a fixed high level or fixed low level for the clock output, in addition to the usual switching between enabling and disabling of the clock output. Bit 7 GM Bit 1 CKE1 Bit 0 CKE0 Description 0 0 0 Internal clock/SCK pin is I/O port 1 Internal clock/SCK pin is clock output 0 Internal clock/SCK pin is fixed at low output 1 Internal clock/SCK pin is clock output 0 Internal clock/SCK pin is fixed at high output 1 Internal clock/SCK pin is clock output 1 1 378 (Initial value) 13.3 Operation 13.3.1 Overview The main features of the smart card interface are as follows. * One frame consists of 8-bit data plus a parity bit. * In transmission, a guard time of at least 2 etu (elementary time units: the time for transfer of one bit) is provided between the end of the parity bit and the start of the next frame. * If a parity error is detected during reception, a low error signal level is output for 1 etu period 10.5 etu after the start bit. * If an error signal is detected during transmission, the same data is transmitted automatically after the elapse of 2 etu or longer. * Only asynchronous communication is supported; there is no synchronous communication function. 13.3.2 Pin Connections Figure 13.2 shows a pin connection diagram for the smart card interface. In communication with a smart card, since both transmission and reception are carried out on a single data transmission line, the TxD pin and RxD pin should both be connected to this line. The data transmission line should be pulled up to VCC with a resistor. When the smart card uses the clock generated on the smart card interface, the SCK pin output is input to the CLK pin of the smart card. If the smart card uses an internal clock, this connection is unnecessary. The reset signal should be output from one of the H8/3008's generic ports. In addition to these pin connections. power and ground connections will normally also be necessary. 379 VCC TxD RxD I/O Data line SCK H8/3008 chip Clock line Px (port) Reset line CLK RST Smart card Card-processing device Figure 13.2 Smart Card Interface Connection Diagram Note: Setting both TE and RE to 1 without connecting a smart card enables closed transmission/reception, allowing self-diagnosis to be carried out. 13.3.3 Data Format Figure 13.3 shows the smart card interface data format. In reception in this mode, a parity check is carried out on each frame, and if an error is detected an error signal is sent back to the transmitting device to request retransmission of the data. In transmission, the error signal is sampled and the same data is retransmitted. 380 No parity error Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp D7 Dp Output from transmitting device Parity error Ds D0 D1 D2 D3 D4 D5 D6 DE Output from transmitting device Legend Ds: D0 to D7: Dp: DE: Start bit Data bits Parity bit Error signal Output from receiving device Figure 13.3 Smart Card Interface Data Format The operating sequence is as follows. 1. When the data line is not in use it is in the high-impedance state, and is fixed high with a pullup resistor. 2. The transmitting device starts transfer of one frame of data. The data frame starts with a start bit (Ds, low-level), followed by 8 data bits (D0 to D7) and a parity bit (Dp). 3. With the smart card interface, the data line then returns to the high-impedance state. The data line is pulled high with a pull-up resistor. 4. The receiving device carries out a parity check. If there is no parity error and the data is received normally, the receiving device waits for reception of the next data. If a parity error occurs, however, the receiving device outputs an error signal (DE, low-level) to request retransmission of the data. After outputting the error signal for the prescribed length of time, the receiving device places the signal line in the high-impedance state again. The signal line is pulled high again by a pull-up resistor. 5. If the transmitting device does not receive an error signal, it proceeds to transmit the next data frame. If it receives an error signal, however, it returns to step 2 and transmits the same data again. 381 13.3.4 Register Settings Table 13.3 shows a bit map of the registers used in the smart card interface. Bits indicated as 0 or 1 must be set to the value shown. The setting of other bits is described in this section. Table 13.3 Smart Card Interface Register Settings Bit Register Address* 1 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 CKS0 SMR H'FFFB0 GM 0 1 O/E 1 0 CKS1 BRR H'FFFB1 BRR7 BRR6 BRR5 BRR4 BRR3 BRR2 BRR1 BRR0 2 SCR H'FFFB2 TIE RIE TE RE 0 0 CKE1* CKE0 TDR H'FFFB3 TDR7 TDR6 TDR5 TDR4 TDR3 TDR2 TDR1 TDR0 SSR H'FFFB4 TDRE RDRF ORER ERS PER TEND 0 0 RDR H'FFFB5 RDR7 RDR6 RDR5 RDR4 RDR3 RDR2 RDR1 RDR0 SCMR H'FFFB6 -- -- -- -- SDIR SINV -- SMIF Notes: -- Unused bit. *1 Lower 20 bits of the address in advanced mode. *2 When GM is cleared to 0 in SMR, the CKE1 bit must also be cleared to 0. Serial Mode Register (SMR) Settings: Clear the GM bit to 0 when using the normal smart card interface mode, or set to 1 when using GSM mode. Clear the O/E bit to 0 if the smart card is of the direct convention type, or set to 1 if of the inverse convention type. Bits CKS1 and CKS0 select the clock source of the built-in baud rate generator. See section 13.3.5, Clock. Bit Rate Register (BRR) Settings: BRR is used to set the bit rate. See section 13.3.5, Clock, for the method of calculating the value to be set. Serial Control Register (SCR) Settings: The TIE, RIE, TE, and RE bits have their normal serial communication functions. See section 12, Serial Communication Interface, for details. The CKE1 and CKE0 bits specify clock output. To disable clock output, clear these bits to 00; to enable clock output, set these bits to 01. Clock output is performed when the GM bit is set to 1 in SMR. Clock output can also be fixed low or high. Smart Card Mode Register (SCMR) Settings: Clear both the SDIR bit and SINV bit cleared to 0 if the smart card is of the direct convention type, and set both to 1 if of the inverse convention type. To use the smart card interface, set the SMIF bit to 1. 382 The register settings and examples of starting character waveforms are shown below for two smart cards, one following the direct convention and one the inverse convention. 1. Direct Convention (SDIR = SINV = O/E = 0) (Z) A Z Z A Z Z Z A A Z Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp (Z) State With the direct convention type, the logic 1 level corresponds to state Z and the logic 0 level to state A, and transfer is performed in LSB-first order. In the example above, the first character data is H'3B. The parity bit is 1, following the even parity rule designated for smart cards. 2. Inverse Convention (SDIR = SINV = O/E = 1) (Z) A Z Z A A A A A A Z Ds D7 D6 D5 D4 D3 D2 D1 D0 Dp (Z) State With the inverse convention type, the logic 1 level corresponds to state A and the logic 0 level to state Z, and transfer is performed in MSB-first order. In the example above, the first character data is H'3F. The parity bit is 0, corresponding to state Z, following the even parity rule designated for smart cards. In the H8/3008, inversion specified by the SINV bit applies only to the data bits, D7 to D0. For parity bit inversion, the O/E bit in SMR must be set to odd parity mode. This applies to both transmission and reception. 383 13.3.5 Clock Only an internal clock generated by the on-chip baud rate generator can be used as the transmit/receive clock for the smart card interface. The bit rate is set with the bit rate register (BRR) and the CKS1 and CKS0 bits in the serial mode register (SMR). The equation for calculating the bit rate is shown below. Table 13.5 shows some sample bit rates. If clock output is selected with CKE0 set to 1, a clock with a frequency of 372 times the bit rate is output from the SCK pin. B= 1488 x 22n-1 x (N + 1) x 106 where, N: BRR setting (0 N 255) B: Bit rate (bit/s) : Operating frequency (MHz) n: See table 13.4 Table 13.4 n-Values of CKS1 and CKS0 Settings n CKS1 CKS0 0 0 0 1 2 1 1 0 3 1 Note: If the gear function is used to divide the clock frequency, use the divided frequency to calculate the bit rate. The equation above applies directly to 1/1 frequency division. Table 13.5 Bit Rates (bits/s) for Various BRR Settings (When n = 0) (MHz) N 7.1424 10.00 10.7136 13.00 14.2848 16.00 18.00 25.00 0 9600.0 13440.9 14400.0 17473.1 19200.0 21505.4 24193.5 33602.2 1 4800.0 6720.4 7200.0 8736.6 9600.0 10752.7 12096.8 16801.1 2 3200.0 4480.3 4800.0 5824.4 6400.0 7168.5 8064.5 11200.7 Note: Bit rates are rounded off to two decimal places. 384 The following equation calculates the bit rate register (BRR) setting from the operating frequency and bit rate. N is an integer from 0 to 255, specifying the value with the smaller error. N= 1488 x 22n-1 x B x 106 - 1 Table 13.6 BRR Settings for Typical Bit Rates (bits/s) (When n = 0) (MHz) 7.1424 10.00 10.7136 13.00 14.2848 16.00 18.00 25.0 bit/s N Error N Error N Error N Error N Error N Error N Error N Error 9600 0 0.00 1 30 1 25 1 8.99 1 0.00 1 12.01 2 15.99 3 12.49 Table 13.7 Maximum Bit Rates for Various Frequencies (Smart Card Interface Mode) (MHz) Maximum Bit Rate (bits/s) N n 7.1424 9600 0 0 10.00 13441 0 0 10.7136 14400 0 0 13.00 17473 0 0 14.2848 19200 0 0 16.00 21505 0 0 18.00 24194 0 0 20.00 26882 0 0 25.00 33602 0 0 The bit rate error is given by the following equation: Error (%) = 1488 x 22n-1 x B x (N + 1) x 106 - 1 x 100 385 13.3.6 Transmitting and Receiving Data Initialization: Before transmitting or receiving data, the smart card interface must be initialized as described below. Initialization is also necessary when switching from transmit mode to receive mode, or vice versa. 1. Clear the TE and RE bits to 0 in the serial control register (SCR). 2. Clear error flags ERS, PER, and ORER to 0 in the serial status register (SSR). 3. Set the parity bit (O/E) and baud rate generator select bits (CKS1 and CKS0) in the serial mode register (SMR). Clear the C/A, CHR, and MP bits to 0, and set the STOP and PE bits to 1. 4. Set the SMIF, SDIR, and SINV bits in the smart card mode register (SCMR). When the SMIF bit is set to 1, the TxD pin and RxD pin are both switched from port to SCI pin functions and go to the high-impedance state. 5. Set a value corresponding to the desired bit rate in the bit rate register (BRR). 6. Set the CKE0 bit in SCR. Clear the TIE, RIE, TE, RE, MPIE, TEIE, and CKE1 bits to 0. If the CKE0 bit is set to 1, the clock is output from the SCK pin. 7. Wait at least one bit interval, then set the TIE, RIE, TE, and RE bits in SCR. Do not set the TE bit and RE bit at the same time, except for self-diagnosis. Transmitting Serial Data: As data transmission in smart card mode involves error signal sampling and retransmission processing, the processing procedure is different from that for the normal SCI. Figure 13.5 shows a sample transmission processing flowchart. 1. 2. 3. 4. Perform smart card interface mode initialization as described in Initialization above. Check that the ERS error flag is cleared to 0 in SSR. Repeat steps 2 and 3 until it can be confirmed that the TEND flag is set to 1 in SSR. Write the transmit data in TDR, clear the TDRE flag to 0, and perform the transmit operation. The TEND flag is cleared to 0. 5. To continue transmitting data, go back to step 2. 6. To end transmission, clear the TE bit to 0. The above processing may include interrupt handling. If transmission ends and the TEND flag is set to 1 while the TIE bit is set to 1 and interrupt requests are enabled, a transmit-data-empty interrupt (TXI) will be requested. If an error occurs in transmission and the ERS flag is set to 1 while the RIE bit is set to 1 and interrupt requests are enabled, a transmit/receive-error interrupt (ERI) will be requested. The timing of TEND flag setting depends on the GM bit in SMR. Figure 13.4 shows timing of TEND flag setting. 386 For details, see Interrupt Operations in this section. Serial data Dp Ds DE Guard time (1) GM = 0 TEND (2) GM = 1 TEND 12.5 etu 11.0 etu Figure 13.4 Timing of TEND Flag Setting 387 Start Initialization Start transmitting No FER/ERS = 0? Yes Error handling No TEND = 1? Yes Write transmit data in TDR, and clear TDRE flag to 0 in SSR No All data transmitted? Yes No FER/ERS = 0? Yes Error handling No TEND = 1? Yes Clear TE bit to 0 End Figure 13.5 Sample Transmission Processing Flowchart 388 TSR (shift register) TDR 1. Data write Data 1 2. Transfer from TDR to TSR Data 1 3. Serial data output Data 1 Data 1 Data remains in TDR Data 1 I/O signal output In case of normal transmission: TEND flag is set In case of transmit error: ERS flag is set Steps 2 and 3 above are repeated until the TEND flag is set. Note: When the ERS flag is set, it should be cleared until transfer of the last bit (D7 in LSB-first transmission, D0 in MSB-first transmission) of the retransmit data to be transmitted next has been completed. Figure 13.6 Relation Between Transmit Operation and Internal Registers I/O data Ds Da Db Dc Dd De Df Dg Dh Dp DE Guard time TXI (TEND interrupt) 12.5 etu 11.0 etu When GM = 0 When GM = 1 Figure 13.7 Timing of TEND Flag Setting Receiving Serial Data: Data reception in smart card mode uses the same processing procedure as for the normal SCI. Figure 13.8 shows a sample reception processing flowchart. 1. Perform smart card interface mode initialization as described in Initialization above. 2. Check that the ORER flag and PER flag are cleared to 0 in SSR. If either is set, perform the appropriate receive error handling, then clear both the ORER and the PER flag to 0. 3. Repeat steps 2 and 3 until it can be confirmed that the RDRF flag is set to 1. 4. Read the receive data from RDR. 5. To continue receiving data, clear the RDRF flag to 0 and go back to step 2. 6. To end reception, clear the RE bit to 0. 389 Start Initialization Start receiving ORER = 0 and PER = 0? No Yes Error handling No RDRF = 1? Yes Read RDR and clear RDRF flag to 0 in SSR No All data received? Yes Clear RE bit to 0 Figure 13.8 Sample Reception Processing Flowchart The above procedure may include interrupt handling. If reception ends and the RDRF flag is set to 1 while the RIE bit is set to 1 and interrupt requests are enabled, a receive-data-full interrupt (RXI) will be requested. If an error occurs in reception and either the ORER flag or the PER flag is set to 1, a transmit/receive-error interrupt (ERI) will be requested. For details, see Interrupt Operations in this section. If a parity error occurs during reception and the PER flag is set to 1, the received data is transferred to RDR, so the erroneous data can be read. Switching Modes: When switching from receive mode to transmit mode, first confirm that the receive operation has been completed, then start from initialization, clearing RE to 0 and setting TE to 1. The RDRF, PER, or ORER flag can be used to check that the receive operation has been completed. 390 When switching from transmit mode to receive mode, first confirm that the transmit operation has been completed, then start from initialization, clearing TE to 0 and setting RE to 1. The TEND flag can be used to check that the transmit operation has been completed. Fixing Clock Output: When the GM bit is set to 1 in SMR, clock output can be fixed by means of the CKE1 and CKE0 bits in SCR. The minimum clock pulse width can be set to the specified width in this case. Figure 13.9 shows the timing for fixing clock output. In this example, GM = 1, CKE1 = 0, and the CKE0 bit is controlled. Specified pulse width Specified pulse width CKE1 value SCK SCR write (CKE0 = 0) SCR write (CKE0 = 1) Figure 13.9 Timing for Fixing Cock Output Interrupt Operations: The smart card interface has three interrupt sources: transmit-data-empty (TXI), transmit/receive-error (ERI), and receive-data-full (RXI). The transmit-end interrupt request (TEI) is not available in smart card mode. A TXI interrupt is requested when the TEND flag is set to 1 in SSR. An RXI interrupt is requested when the RDRF flag is set to 1 in SSR. An ERI interrupt is requested when the ORER, PER, or ERS flag is set to 1 in SSR. These relationships are shown in table 13.8. Table 13.8 Smart Card Interface Mode Operating States and Interrupt Sources Operating State Transmit Mode Receive Mode Flag Enable Bit Interrupt Source Normal operation TEND TIE TXI Error ERS RIE ERI Normal operation RDRF RIE RXI Error PER, ORER RIE ERI 391 Examples of Operation in GSM Mode: When switching between smart card interface mode and software standby mode, use the following procedures to maintain the clock duty cycle. * Switching from smart card interface mode to software standby mode 1. Set the P9 4 data register (DR) and data direction register (DDR) to the values for the fixed output state in software standby mode. 2. Write 0 in the TE and RE bits in the serial control register (SCR) to stop transmit/receive operations. At the same time, set the CKE1 bit to the value for the fixed output state in software standby mode. 3. Write 0 in the CKE0 bit in SCR to stop the clock. 4. Wait for one serial clock cycle. During this period, the duty cycle is preserved and clock output is fixed at the specified level. 5. Write H'00 in the serial mode register (SMR) and smart card mode register (SCMR). 6. Make the transition to the software standby state. * Returning from software standby mode to smart card interface mode 1'. Clear the software standby state. 2'. Set the CKE1 bit in SCR to the value for the fixed output state at the start of software standby (the current P94 pin state). 3'. Set smart card interface mode and output the clock. Clock signal generation is started with the normal duty cycle. Software standby Normal operation 1 2 3 4 5 6 Normal operation 1' 2' 3' Figure 13.10 Procedure for Stopping and Restarting the Clock Use the following procedure to secure the clock duty cycle after powering on. 1. The initial state is port input and high impedance. Use pull-up or pull-down resistors to fix the potential. 2. Fix at the output specified by the CKE1 bit in SCR. 3. Set SMR and SCMR, and switch to smart card interface mode operation. 4. Set the CKE0 bit to 1 in SCR to start clock output. 392 13.4 Usage Notes The following points should be noted when using the SCI as a smart card interface. Receive Data Sampling Timing and Receive Margin in Smart Card Interface Mode: In smart card interface mode, the SCI operates on a base clock with a frequency of 372 times the transfer rate. In reception, the SCI synchronizes internally with the fall of the start bit, which it samples on the base clock. Receive data is latched at the rising edge of the 186th base clock pulse. The timing is shown in figure 13.11. 372 clocks 186 clocks 0 185 185 371 0 371 0 Internal base clock Receive data (RxD) Start bit D0 D1 Synchronization sampling timing Data sampling timing Figure 13.11 Receive Data Sampling Timing in Smart Card Interface Mode 393 The receive margin can therefore be expressed as follows. Receive margin in smart card interface mode: M = (0.5 - 1 ) - (L - 0.5) F - 2N M: N: D: L: F: D - 0.5 (1 + F) x 100% N Receive margin (%) Ratio of clock frequency to bit rate (N = 372) Clock duty cycle (L = 0 to 1.0) Frame length (L =10) Absolute deviation of clock frequency From the above equation, if F = 0 and D = 0.5, the receive margin is as follows. When D = 0.5 and F = 0: M = (0.5 - 1/2 x 372) x 100% = 49.866% Retransmission: Retransmission is performed by the SCI in receive mode and transmit mode as described below. * Retransmission when SCI is in Receive Mode Figure 13.12 illustrates retransmission when the SCI is in receive mode. 1. If an error is found when the received parity bit is checked, the PER bit is automatically set to 1. If the RIE bit in SCR is set to the enable state, an ERI interrupt is requested. The PER bit should be cleared to 0 in SSR before the next parity bit sampling timing. 2. The RDRF bit in SSR is not set for the frame in which the error has occurred. 3. If an error is found when the received parity bit is checked, the PER bit is not set to 1 in SSR. 4. If no error is found when the received parity bit is checked, the receive operation is assumed to have been completed normally, and the RDRF bit is automatically set to 1 in SSR. If the RIE bit in SCR is set to the enable state, an RXI interrupt is requested. 5. When a normal frame is received, the data pin is held in three-state at the error signal transmission timing. 394 Frame n Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp Frame n+1 Retransmitted frame DE Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp (DE) Ds D0 D1 D2 D3 D4 RDRF [2] [4] [1] [3] PER Figure 13.12 Retransmission in SCI Receive Mode * Retransmission when SCI is in Transmit Mode Figure 13.13 illustrates retransmission when the SCI is in transmit mode. 6. If an error signal is sent back from the receiving device after transmission of one frame is completed, the ERS bit is set to 1 in SSR. If the RIE bit in SCR is set to the enable state, an ERI interrupt is requested. The ERS bit should be cleared to 0 in SSR before the next parity bit sampling timing. 7. The TEND bit in SSR is not set for the frame for which the error signal was received. 8. If an error signal is not sent back from the receiving device, the ERS flag is not set in SSR. 9. If an error signal is not sent back from the receiving device, transmission of one frame, including retransmission, is assumed to have been completed, and the TEND bit is set to 1 in SSR. If the TIE bit in SCR is set to the enable state, a TXI interrupt is requested. Frame n Frame n+1 Retransmitted frame Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp DE Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp (DE) Ds D0 D1 D2 D3 D4 TDRE Transfer from TDR to TSR Transfer from TDR to TSR Transfer from TDR to TSR TEND [7] [9] ERS [6] [8] Figure 13.13 Retransmission in SCI Transmit Mode Note on Block Transfer Mode Support: The smart card interface installed in the H8/3008 supports an IC card (smart card) interface with provision for ISO/IEC7816-3 T=0 (character transmission). Therefore, block transfer operations are not supported (error signal transmission, detection, and automatic data retransmission are not performed). 395 396 Section 14 A/D Converter 14.1 Overview The H8/3008 includes a 10-bit successive-approximations A/D converter with a selection of up to eight analog input channels. When the A/D converter is not used, it can be halted independently to conserve power. For details see section 18.6, Module Standby Function. The H8/3008 supports 70/134-state conversion as a high-speed conversion mode. Note that it differs in this respect from the H8/3048 Series, which supports 134/266-state conversion. 14.1.1 Features A/D converter features are listed below. * 10-bit resolution * Eight input channels * Selectable analog conversion voltage range The analog voltage conversion range can be programmed by input of an analog reference voltage at the V REF pin. * High-speed conversion Conversion time: minimum 5.36 s per channel * Two conversion modes Single mode: A/D conversion of one channel Scan mode: continuous A/D conversion on one to four channels * Four 16-bit data registers A/D conversion results are transferred for storage into data registers corresponding to the channels. * Sample-and-hold function * Three conversion start sources The A/D converter can be activated by software, an external trigger, or an 8-bit timer compare match. * A/D interrupt requested at end of conversion At the end of A/D conversion, an A/D end interrupt (ADI) can be requested. 397 14.1.2 Block Diagram Figure 14.1 shows a block diagram of the A/D converter. Internal data bus AVSS AN 0 ADCR ADCSR ADDRD - AN 2 AN 4 ADDRC + AN 1 AN 3 ADDRB 10-bit D/A ADDRA VREF Successiveapproximations register AVCC Bus interface Module data bus Analog multiplexer AN 5 o/4 Comparator Control circuit Sample-andhold circuit o/8 AN 6 AN 7 ADI interrupt signal ADTRG Compare match A0 ADTE 8-bit timer 8TCSR0 Legend: ADCR: ADCSR: ADDRA: ADDRB: ADDRC: ADDRD: A/D control register A/D control/status register A/D data register A A/D data register B A/D data register C A/D data register D Figure 14.1 A/D Converter Block Diagram 398 14.1.3 Pin Configuration Table 14.1 summarizes the A/D converter's input pins. The eight analog input pins are divided into two groups: group 0 (AN0 to AN3), and group 1 (AN4 to AN7). AVCC and AVSS are the power supply for the analog circuits in the A/D converter. VREF is the A/D conversion reference voltage. Table 14.1 A/D Converter Pins Pin Name Abbreviation I/O Analog power supply pin AVCC Input Analog power supply Analog ground pin AVSS Input Analog ground and reference voltage Reference voltage pin VREF Input Analog reference voltage Analog input pin 0 AN 0 Input Group 0 analog inputs Analog input pin 1 AN 1 Input Analog input pin 2 AN 2 Input Analog input pin 3 AN 3 Input Analog input pin 4 AN 4 Input Analog input pin 5 AN 5 Input Analog input pin 6 AN 6 Input Analog input pin 7 AN 7 Input A/D external trigger input pin ADTRG Input Function Group 1 analog inputs External trigger input for starting A/D conversion 399 14.1.4 Register Configuration Table 14.2 summarizes the A/D converter's registers. Table 14.2 A/D Converter Registers Address* 1 Name Abbreviation R/W Initial Value H'FFFE0 A/D data register A H ADDRAH R H'00 H'FFFE1 A/D data register A L ADDRAL R H'00 H'FFFE2 A/D data register B H ADDRBH R H'00 H'FFFE3 A/D data register B L ADDRBL R H'00 H'FFFE4 A/D data register C H ADDRCH R H'00 H'FFFE5 A/D data register C L ADDRCL R H'00 H'FFFE6 A/D data register D H ADDRDH R H'00 H'FFFE7 A/D data register D L ADDRDL R H'00 H'FFFE8 A/D control/status register ADCSR R/(W)* H'FFFE9 A/D control register ADCR R/W 2 H'00 H'7E Notes: *1 Lower 20 bits of the address in advanced mode. *2 Only 0 can be written in bit 7, to clear the flag. 14.2 Register Descriptions 14.2.1 A/D Data Registers A to D (ADDRA to ADDRD) Bit ADDRn 14 12 10 8 6 5 4 3 2 1 0 AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 -- -- -- -- -- -- 15 13 11 9 7 Initial value 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Read/Write (n = A to D) R R R R R R R R R R R R R R R R A/D conversion data 10-bit data giving an A/D conversion result Reserved bits The four A/D data registers (ADDRA to ADDRD) are 16-bit read-only registers that store the results of A/D conversion. An A/D conversion produces 10-bit data, which is transferred for storage into the A/D data register corresponding to the selected channel. The upper 8 bits of the result are stored in the upper byte of the A/D data register. The lower 2 bits are stored in the lower byte. Bits 5 to 0 of an A/D 400 data register are reserved bits that are always read as 0. Table 14.3 indicates the pairings of analog input channels and A/D data registers. The CPU can always read and write the A/D data registers. The upper byte can be read directly, but the lower byte is read through a temporary register (TEMP). For details see section 14.3, CPU Interface. The A/D data registers are initialized to H'0000 by a reset and in standby mode. Table 14.3 Analog Input Channels and A/D Data Registers (ADDRA to ADDRD) Analog Input Channel Group 0 Group 1 A/D Data Register AN 0 AN 4 ADDRA AN 1 AN 5 ADDRB AN 2 AN 6 ADDRC AN 3 AN 7 ADDRD 14.2.2 A/D Control/Status Register (ADCSR) Bit 7 6 5 4 3 2 1 0 ADF ADIE ADST SCAN CKS CH2 CH1 CH0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/(W) * R/W R/W R/W R/W R/W R/W R/W Channel select 2 to 0 These bits select analog input channels Clock select Selects the A/D conversion time Scan mode Selects single mode or scan mode A/D start Starts or stops A/D conversion A/D interrupt enable Enables and disables A/D end interrupts A/D end flag Indicates end of A/D conversion Note: * Only 0 can be written, to clear the flag. 401 ADCSR is an 8-bit readable/writable register that selects the mode and controls the A/D converter. ADCSR is initialized to H'00 by a reset and in standby mode. Bit 7--A/D End Flag (ADF): Indicates the end of A/D conversion. Bit 7 ADF Description 0 [Clearing condition] Read ADF when ADF =1, then write 0 in ADF. 1 [Setting conditions] * Single mode: A/D conversion ends * Scan mode: A/D conversion ends in all selected channels (Initial value) Bit 6--A/D Interrupt Enable (ADIE): Enables or disables the interrupt (ADI) requested at the end of A/D conversion. Bit 6 ADIE Description 0 A/D end interrupt request (ADI) is disabled 1 A/D end interrupt request (ADI) is enabled (Initial value) Bit 5--A/D Start (ADST): Starts or stops A/D conversion. The ADST bit remains set to 1 during A/D conversion. It can also be set to 1 by external trigger input at the ADTRG pin, or by an 8-bit timer compare match. Bit 5 ADST Description 0 A/D conversion is stopped 1 Single mode: A/D conversion starts; ADST is automatically cleared to 0 when conversion ends. Scan mode: A/D conversion starts and continues, cycling among the selected channels, until ADST is cleared to 0 by software, by a reset, or by a transition to standby mode. (Initial value) Bit 4--Scan Mode (SCAN): Selects single mode or scan mode. For further information on operation in these modes, see section 14.4, Operation. Clear the ADST bit to 0 before switching the conversion mode. Bit 4 SCAN Description 0 Single mode 1 Scan mode 402 (Initial value) Bit 3--Clock Select (CKS): Selects the A/D conversion time. Clear the ADST bit to 0 before switching the conversion time. Bit 3 CKS Description 0 Conversion time = 134 states (maximum) 1 Conversion time = 70 states (maximum) (Initial value) Bits 2 to 0--Channel Select 2 to 0 (CH2 to CH0): These bits and the SCAN bit select the analog input channels. Clear the ADST bit to 0 before changing the channel selection. Group Selection Channel Selection Description CH2 CH1 CH0 Single Mode Scan Mode 0 0 0 AN 0 (Initial value) AN 0 1 AN 1 AN 0, AN 1 0 AN 2 AN 0 to AN2 1 AN 3 AN 0 to AN3 0 AN 4 AN 4 1 AN 5 AN 4, AN 5 0 AN 6 AN 4 to AN6 1 AN 7 AN 4 to AN7 1 1 0 1 14.2.3 A/D Control Register (ADCR) Bit 7 6 5 4 3 2 1 0 TRGE -- -- -- -- -- -- -- Initial value 0 1 1 1 1 1 1 0 Read/Write R/W -- -- -- -- -- -- R/W Reserved bits Trigger enable Enables or disables starting of A/D conversion by an external trigger or 8-bit timer compare match ADCR is an 8-bit readable/writable register that enables or disables starting of A/D conversion by external trigger input or an 8-bit timer compare match signal. ADCR is initialized to H'7F by a reset and in standby mode. 403 Bit 7--Trigger Enable (TRGE): Enables or disables starting of A/D conversion by an external trigger or 8-bit timer compare match. Bit 7 TRGE Description 0 Starting of A/D conversion by an external trigger or 8-bit timer compare match is disabled 1 A/D conversion is started at the falling edge of the external trigger signal (ADTRG) or by an 8-bit timer compare match (Initial value) External trigger pin and 8-bit timer selection is performed by the 8-bit timer. For details, see section 9, 8-Bit Timers. Bits 6 to 1--Reserved: These bits cannot be modified and are always read as 1. Bit 0--Reserved: This bit can be read or written, but must not be set to 1. 14.3 CPU Interface ADDRA to ADDRD are 16-bit registers, but they are connected to the CPU by an 8-bit data bus. Therefore, although the upper byte can be be accessed directly by the CPU, the lower byte is read through an 8-bit temporary register (TEMP). An A/D data register is read as follows. When the upper byte is read, the upper-byte value is transferred directly to the CPU and the lower-byte value is transferred into TEMP. Next, when the lower byte is read, the TEMP contents are transferred to the CPU. When reading an A/D data register, always read the upper byte before the lower byte. It is possible to read only the upper byte, but if only the lower byte is read, incorrect data may be obtained. Figure 14.2 shows the data flow for access to an A/D data register. 404 Upper-byte read Module data bus CPU (H'AA) Bus interface TEMP (H'40) ADDRnH (H'AA) ADDRnL (H'40) (n = A to D) Lower-byte read CPU (H'40) Module data bus Bus interface TEMP (H'40) ADDRnH (H'AA) ADDRnL (H'40) (n = A to D) Figure 14.2 A/D Data Register Access Operation (Reading H'AA40) 405 14.4 Operation The A/D converter operates by successive approximations with 10-bit resolution. It has two operating modes: single mode and scan mode. 14.4.1 Single Mode (SCAN = 0) Single mode should be selected when only one A/D conversion on one channel is required. A/D conversion starts when the ADST bit is set to 1 by software, or by external trigger input. The ADST bit remains set to 1 during A/D conversion and is automatically cleared to 0 when conversion ends. When conversion ends the ADF flag is set to 1. If the ADIE bit is also set to 1, an ADI interrupt is requested at this time. To clear the ADF flag to 0, first read ADCSR, then write 0 in ADF. When the mode or analog input channel must be switched during analog conversion, to prevent incorrect operation, first clear the ADST bit to 0 in ADCSR to halt A/D conversion. After making the necessary changes, set the ADST bit to 1 to start A/D conversion again. The ADST bit can be set at the same time as the mode or channel is changed. Typical operations when channel 1 (AN1) is selected in single mode are described next. Figure 14.3 shows a timing diagram for this example. 1. Single mode is selected (SCAN = 0), input channel AN1 is selected (CH2 = CH1 = 0, CH0 = 1), the A/D interrupt is enabled (ADIE = 1), and A/D conversion is started (ADST = 1). 2. When A/D conversion is completed, the result is transferred into ADDRB. At the same time the ADF flag is set to 1, the ADST bit is cleared to 0, and the A/D converter becomes idle. 3. Since ADF = 1 and ADIE = 1, an ADI interrupt is requested. 4. The A/D interrupt handling routine starts. 5. The routine reads ADCSR, then writes 0 in the ADF flag. 6. The routine reads and processes the conversion result (ADDRB). 7. Execution of the A/D interrupt handling routine ends. After that, if the ADST bit is set to 1, A/D conversion starts again and steps 2 to 7 are repeated. 406 Figure 14.3 Example of A/D Converter Operation (Single Mode, Channel 1 Selected) 407 Note: * Vertical arrows ( ) indicate instructions executed by software. ADDRD ADDRC ADDRB Read conversion result A/D conversion result (2) Idle Clear * A/D conversion result (1) A/D conversion (2) Set * Read conversion result Idle State of channel 3 (AN 3) ADDRA Idle State of channel 2 (AN 2) Idle Clear * State of channel 1 (AN 1) A/D conversion (1) Set * Idle Idle A/D conversion starts State of channel 0 (AN 0) ADF ADST ADIE Set * 14.4.2 Scan Mode (SCAN = 1) Scan mode is useful for monitoring analog inputs in a group of one or more channels. When the ADST bit is set to 1 by software or external trigger input, A/D conversion starts on the first channel in the group (AN0 when CH2 = 0, AN4 when CH2 = 1). When two or more channels are selected, after conversion of the first channel ends, conversion of the second channel (AN1 or AN5) starts immediately. A/D conversion continues cyclically on the selected channels until the ADST bit is cleared to 0. The conversion results are transferred for storage into the A/D data registers corresponding to the channels. When the mode or analog input channel selection must be changed during analog conversion, to prevent incorrect operation, first clear the ADST bit to 0 in ADCSR to halt A/D conversion. After making the necessary changes, set the ADST bit to 1. A/D conversion will start again from the first channel in the group. The ADST bit can be set at the same time as the mode or channel selection is changed. Typical operations when three channels in group 0 (AN0 to AN2) are selected in scan mode are described next. Figure 14.4 shows a timing diagram for this example. 1. Scan mode is selected (SCAN = 1), scan group 0 is selected (CH2 = 0), analog input channels AN0 to AN2 are selected (CH1 = 1, CH0 = 0), and A/D conversion is started (ADST = 1). 2. When A/D conversion of the first channel (AN0) is completed, the result is transferred into ADDRA. Next, conversion of the second channel (AN 1) starts automatically. 3. Conversion proceeds in the same way through the third channel (AN2). 4. When conversion of all selected channels (AN0 to AN2) is completed, the ADF flag is set to 1 and conversion of the first channel (AN0) starts again. If the ADIE bit is set to 1, an ADI interrupt is requested when A/D conversion ends. 5. Steps 2 to 4 are repeated as long as the ADST bit remains set to 1. When the ADST bit is cleared to 0, A/D conversion stops. After that, if the ADST bit is set to 1, A/D conversion starts again from the first channel (AN0). 408 Figure 14.4 Example of A/D Converter Operation (Scan Mode, Channels AN0 to AN2 Selected) 409 Idle Idle Idle A/D conversion (1) Transfer Idle A/D conversion (3) Idle Idle Clear* 1 Idle A/D conversion result (3) A/D conversion result (2) A/D conversion result (4) Idle A/D conversion (5)* 2 A/D conversion time A/D conversion (4) A/D conversion result (1) A/D conversion (2) Idle Notes: *1 Vertical arrows ( ) indicate instructions executed by software. *2 Data currently being converted is ignored. ADDRD ADDRC ADDRB ADDRA State of channel 3 (AN 3) State of channel 2 (AN 2) State of channel 1 (AN 1) State of channel 0 (AN 0) ADF ADST Set * 1 Continuous A/D conversion Clear* 1 14.4.3 Input Sampling and A/D Conversion Time The A/D converter has a built-in sample-and-hold circuit. The A/D converter samples the analog input at a time tD after the ADST bit is set to 1, then starts conversion. Figure 14.5 shows the A/D conversion timing. Table 14.4 indicates the A/D conversion time. As indicated in figure 14.5, the A/D conversion time includes t D and the input sampling time. The length of tD varies depending on the timing of the write access to ADCSR. The total conversion time therefore varies within the ranges indicated in table 14.4. In scan mode, the values given in table 14.4 apply to the first conversion. In the second and subsequent conversions the conversion time is fixed at 128 states when CKS = 0 or 66 states when CKS = 1. (1) Address bus (2) Write signal Input sampling timing ADF t SPL tD t CONV Legend: ADCSR write cycle (1): ADCSR address (2): Synchronization delay tD : t SPL : Input sampling time t CONV : A/D conversion time Figure 14.5 A/D Conversion Timing 410 Table 14.4 A/D Conversion Time (Single Mode) CKS = 0 CKS = 1 Symbol Min Typ Max Min Typ Max Synchronization delay tD 6 -- 9 4 -- 5 Input sampling time t SPL -- 31 -- -- 15 -- A/D conversion time t CONV 131 -- 134 69 -- 70 Note: Values in the table are numbers of states. 14.4.4 External Trigger Input Timing A/D conversion can be externally triggered When the TRGE bit is set to 1 in ADCR and the 8-bit timer's ADTE bit is cleared to 0, external trigger input is enabled at the ADTRG pin. A high-tolow transition at the ADTRG pin sets the ADST bit to 1 in ADCSR, starting A/D conversion. Other operations, in both single and scan modes, are the same as if the ADST bit had been set to 1 by software. Figure 14.6 shows the timing. ADTRG Internal trigger signal ADST A/D conversion Figure 14.6 External Trigger Input Timing 411 14.5 Interrupts The A/D converter generates an interrupt (ADI) at the end of A/D conversion. The ADI interrupt request can be enabled or disabled by the ADIE bit in ADCSR. 14.6 Usage Notes When using the A/D converter, note the following points: 1. Analog Input Voltage Range During A/D conversion, the voltages input to the analog input pins ANn should be in the range AVSS ANn VREF. 2. Relationships of AVCC and AVSS to VCC and V SS AVCC, AVSS, VCC, and VSS should be related as follows: AVSS = VSS . AVCC and AVSS must not be left open, even if the A/D converter is not used. 3. VREF Programming Range The reference voltage input at the VREF pin should be in the range VREF AVCC. 4. Note on Board Design In board layout, separate the digital circuits from the analog circuits as much as possible. Particularly avoid layouts in which the signal lines of digital circuits cross or closely approach the signal lines of analog circuits. Induction and other effects may cause the analog circuits to operate incorrectly, or may adversely affect the accuracy of A/D conversion. The analog input signals (AN0 to AN7), analog reference voltage (VREF), and analog supply voltage (AVCC) must be separated from digital circuits by the analog ground (AVSS ). The analog ground (AVSS ) should be connected to a stable digital ground (VSS) at one point on the board. 5. Note on Noise To prevent damage from surges and other abnormal voltages at the analog input pins (AN0 to AN7) and analog reference voltage pin (VREF), connect a protection circuit like the one in figure 14.7 between AVCC and AVSS . The bypass capacitors connected to AV CC and V REF and the filter capacitors connected to AN0 to AN7 must be connected to AVSS. If filter capacitors like the ones in figure 14.7 are connected, the voltage values input to the analog input pins (AN 0 to AN7) will be smoothed, which may give rise to error. Error can also occur if A/D conversion is frequently performed in scan mode so that the current that charges and discharges the capacitor in the sample-and-hold circuit of the A/D converter becomes greater than that input to the analog input pins via input impedance (Rin). The circuit constants should therefore be selected carefully. 412 AV CC VREF Rin* 2 *1 100 AN0 to AN7 *1 0.1 F AV SS Notes: *1 10 F 0.01 F *2 Rin: input impedance Figure 14.7 Example of Analog Input Protection Circuit Table 14.5 Analog Input Pin Ratings Item Min Max Unit Analog input capacitance -- 20 pF Allowable signal-source impedance -- 10* k Note: * When conversion time = 134 states, VCC = 4.0 V to 5.5 V, and 13 MHz. For details, see section 19. Electrical Characteristics. 10 k AN0 to AN 7 To A/D converter 20 pF Figure 14.8 Analog Input Pin Equivalent Circuit Note: Numeric values are approximate, except in table 14.5 413 6. A/D Conversion Accuracy Definitions A/D conversion accuracy in the H8/3008 is defined as follows: * Resolution Digital output code length of A/D converter * Offset error Deviation from ideal A/D conversion characteristic of analog input voltage required to raise digital output from minimum voltage value 0000000000 to 0000000001 (figure 14.10) * Full-scale error Deviation from ideal A/D conversion characteristic of analog input voltage required to raise digital output from 1111111110 to 1111111111 (figure 14.10) * Quantization error Intrinsic error of the A/D converter; 1/2 LSB (figure 14.9) * Nonlinearity error Deviation from ideal A/D conversion characteristic in range from zero volts to full scale, exclusive of offset error, full-scale error, and quantization error. * Absolute accuracy Deviation of digital value from analog input value, including offset error, full-scale error, quantization error, and nonlinearity error. Digital output 111 Ideal A/D conversion characteristic 110 101 100 011 010 Quantization error 001 000 1/8 2/8 3/8 4/8 5/8 6/8 7/8 FS Analog input voltage Figure 14.9 A/D Converter Accuracy Definitions (1) 414 Full-scale error Digital output Ideal A/D conversion characteristic Nonlinearity error Actual A/D conversion characteristic FS Offset error Analog input voltage Figure 14.10 A/D Converter Accuracy Definitions (2) 7. Allowable Signal-Source Impedance The analog inputs of the H8/3008 are designed to assure accurate conversion of input signals with a signal-source impedance not exceeding 10 k. The reason for this rating is that it enables the input capacitor in the sample-and-hold circuit in the A/D converter to charge within the sampling time. If the sensor output impedance exceeds 10 k, charging may be inadequate and the accuracy of A/D conversion cannot be guaranteed. If a large external capacitor is provided in single mode, then the internal 10-k input resistance becomes the only significant load on the input. In this case the impedance of the signal source is not a problem. A large external capacitor, however, acts as a low-pass filter. This may make it impossible to track analog signals with high dv/dt (e.g. a variation of 5 mV/s) (figure 14.11). To convert high-speed analog signals or to use scan mode, insert a low-impedance buffer. 8. Effect on Absolute Accuracy Attaching an external capacitor creates a coupling with ground, so if there is noise on the ground line, it may degrade absolute accuracy. The capacitor must be connected to an electrically stable ground, such as AVSS. If a filter circuit is used, be careful of interference with digital signals on the same board, and make sure the circuit does not act as an antenna. 415 H8/3008 Sensor output impedance Sensor input 10 k Up to 10 k Low-pass filter C up to 0.1 F Equivalent circuit of A/D converter Cin = 15 pF Figure 14.11 Analog Input Circuit (Example) 416 20 pF Section 15 D/A Converter 15.1 Overview The H8/3008 includes a D/A converter with two channels. 15.1.1 Features D/A converter features are listed below. * * * * * Eight-bit resolution Two output channels Conversion time: maximum 10 s (with 20-pF capacitive load) Output voltage: 0 V to VREF D/A outputs can be sustained in software standby mode 417 15.1.2 Block Diagram Bus interface Figure 15.1 shows a block diagram of the D/A converter. Module data bus DACR 8-bit D/A DADR1 DA 0 DADR0 AVCC DASTCR VREF DA 1 AVSS Control circuit Legend: DACR: DADR0: DADR1: DASTCR: D/A control register D/A data register 0 D/A data register 1 D/A standby control register Figure 15.1 D/A Converter Block Diagram 418 Internal data bus 15.1.3 Pin Configuration Table 15.1 summarizes the D/A converter's input and output pins. Table 15.1 D/A Converter Pins Pin Name Abbreviation I/O Analog power supply pin AVSS Input Analog power supply and reference voltage Analog ground pin AVSS Input Analog ground and reference voltage Analog output pin 0 DA 0 Output Analog output, channel 0 Analog output pin 1 DA 1 Output Analog output, channel 1 Reference voltage input pin VREF Input Analog reference voltage 15.1.4 Function Register Configuration Table 15.2 summarizes the D/A converter's registers. Table 15.2 D/A Converter Registers Address* Name Abbreviation R/W Initial Value H'FFF9C D/A data register 0 DADR0 R/W H'00 H'FFF9D D/A data register 1 DADR1 R/W H'00 H'FFF9E D/A control register DACR R/W H'1F H'EE01A D/A standby control register DASTCR R/W H'FE Note: * Lower 20 bits of the address in advanced mode. 419 15.2 Register Descriptions 15.2.1 D/A Data Registers 0 and 1 (DADR0, DADR1) Bit 7 6 5 4 3 2 1 0 Initial value 0 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W The D/A data registers (DADR0 and DADR1) are 8-bit readable/writable registers that store the data to be converted. When analog output is enabled, the D/A data register values are constantly converted and output at the analog output pins. The D/A data registers are initialized to H'00 by a reset and in standby mode. When the DASTE bit is set to 1 in the D/A standby control register (DASTCR), the D/A registers are not initialized in software standby mode. 15.2.2 D/A Control Register (DACR) Bit 7 6 5 4 3 2 1 0 DAOE1 DAOE0 DAE -- -- -- -- -- Initial value 0 0 0 1 1 1 1 1 Read/Write R/W R/W R/W -- -- -- -- -- D/A enable Controls D/A conversion D/A output enable 0 Controls D/A conversion and analog output D/A output enable 1 Controls D/A conversion and analog output DACR is an 8-bit readable/writable register that controls the operation of the D/A converter. DACR is initialized to H'1F by a reset and in standby mode. When the DASTE bit is set to 1 in the D/A standby control register (DASTCR), the D/A registers are not initialized in software standby mode. 420 Bit 7--D/A Output Enable 1 (DAOE1): Controls D/A conversion and analog output. Bit 7 DAOE1 Description 0 DA 1 analog output is disabled 1 Channel-1 D/A conversion and DA 1 analog output are enabled Bit 6--D/A Output Enable 0 (DAOE0): Controls D/A conversion and analog output. Bit 6 DAOE0 Description 0 DA 0 analog output is disabled 1 Channel-0 D/A conversion and DA 0 analog output are enabled Bit 5--D/A Enable (DAE): Controls D/A conversion, together with bits DAOE0 and DAOE1. When the DAE bit is cleared to 0, analog conversion is controlled independently in channels 0 and 1. When the DAE bit is set to 1, analog conversion is controlled together in channels 0 and 1. Output of the conversion results is always controlled independently by DAOE0 and DAOE1. Bit 7 Bit 6 Bit 5 DAOE1 DAOE0 DAE Description 0 0 -- D/A conversion is disabled in channels 0 and 1 0 1 0 D/A conversion is enabled in channel 0 D/A conversion is disabled in channel 1 0 1 1 D/A conversion is enabled in channels 0 and 1 1 0 0 D/A conversion is disabled in channel 0 D/A conversion is enabled in channel 1 1 0 1 D/A conversion is enabled in channels 0 and 1 1 1 -- D/A conversion is enabled in channels 0 and 1 When the DAE bit is set to 1, even if bits DAOE0 and DAOE1 in DACR and the ADST bit in ADCSR are cleared to 0, the same current is drawn from the analog power supply as during A/D and D/A conversion. Bits 4 to 0--Reserved: These bits cannot be modified and are always read as 1. 421 15.2.3 D/A Standby Control Register (DASTCR) DASTCR is an 8-bit readable/writable register that enables or disables D/A output in software standby mode. Bit 7 6 5 4 3 2 1 0 -- -- -- -- -- -- -- DASTE Initial value 1 1 1 1 1 1 1 0 Read/Write -- -- -- -- -- -- -- R/W Reserved bits D/A standby enable Enables or disables D/A output in software standby mode DASTCR is initialized to H'FE by a reset and in hardware standby mode. It is not initialized in software standby mode. Bits 7 to 1--Reserved: These bits cannot be modified and are always read as 1. Bit 0--D/A Standby Enable (DASTE): Enables or disables D/A output in software standby mode. Bit 0 DASTE Description 0 D/A output is disabled in software standby mode 1 D/A output is enabled in software standby mode 15.3 (Initial value) Operation The D/A converter has two built-in D/A conversion circuits that can perform conversion independently. D/A conversion is performed constantly while enabled in DACR. If the DADR0 or DADR1 value is modified, conversion of the new data begins immediately. The conversion results are output when bits DAOE0 and DAOE1 are set to 1. 422 An example of D/A conversion on channel 0 is given next. Timing is indicated in figure 15.2. 1. Data to be converted is written in DADR0. 2. Bit DAOE0 is set to 1 in DACR. D/A conversion starts and DA0 becomes an output pin. The converted result is output after the conversion time. The output value is DADR contents x VREF 256 Output of this conversion result continues until the value in DADR0 is modified or the DAOE0 bit is cleared to 0. 3. If the DADR0 value is modified, conversion starts immediately, and the result is output after the conversion time. 4. When the DAOE0 bit is cleared to 0, DA0 becomes an input pin. DADR0 write cycle DACR write cycle DADR0 write cycle DACR write cycle Address Conversion data 1 DADR0 Conversion data 2 DAOE0 DA 0 Conversion result 2 Conversion result 1 High-impedance state t DCONV t DCONV Legend: t DCONV : D/A conversion time Figure 15.2 Example of D/A Converter Operation 423 15.4 D/A Output Control In the H8/3008, D/A converter output can be enabled or disabled in software standby mode. When the DASTE bit is set to 1 in DASTCR, D/A converter output is enabled in software standby mode. The D/A converter registers retain the values they held prior to the transition to software standby mode. When D/A output is enabled in software standby mode, the reference supply current is the same as during normal operation. 424 Section 16 RAM 16.1 Overview The H8/3008 has high-speed static RAM on-chip. The RAM is connected to the CPU by a 16-bit data bus. The CPU accesses both byte data and word data in two states, making the RAM useful for rapid data transfer. The on-chip RAM can be enabled or disabled with the RAM enable bit (RAME) in the system control register (SYSCR). When the on-chip RAM is disabled, that area is assigned to external space in the expanded modes. The on-chip RAM specifications for the H8/3008 are shown in table 16.1. Table 16.1 H8/3008 On-Chip RAM Specifications RAM size Address assignment 4 kbytes Modes 1, 2 H'FEF20 to H'FFF1F Modes 3, 4 H'FFEF20 to H'FFFF1F 425 16.1.1 Block Diagram Figure 16.1 shows a block diagram of the on-chip RAM. Internal data bus (upper 8 bits) Internal data bus (lower 8 bits) SYSCR Bus interface H'FEF20* H'FEF21* H'FEF22* H'FEF23* On-chip RAM H'FFF1E* H'FFF1F* Even addresses Odd addresses Legend: SYSCR: System control register Note: * The lower 20 bits of the address are shown. Figure 16.1 RAM Block Diagram 16.1.2 Register Configuration The on-chip RAM is controlled by SYSCR. Table 16.2 gives the address and initial value of SYSCR. Table 16.2 System Control Register Address* Name Abbreviation R/W Initial Value H'EE012 System control register SYSCR R/W H'09 Note: * Lower 20 bits of the address in advanced mode. 426 16.2 System Control Register (SYSCR) Bit 7 6 5 4 3 2 1 0 SSBY STS2 STS1 STS0 UE NMIEG SSOE RAME Initial value 0 0 0 0 1 0 0 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W RAM enable bit Enables or disables on-chip RAM Software standby output port enable NMI edge select User bit enable Standby timer select 2 to 0 Software standby One function of SYSCR is to enable or disable access to the on-chip RAM. The on-chip RAM is enabled or disabled by the RAME bit in SYSCR. For details about the other bits, see section 3.3, System Control Register (SYSCR). Bit 0--RAM Enable (RAME): Enables or disables the on-chip RAM. The RAME bit is initialized at the rising edge of the input at the RES pin. It is not initialized in software standby mode. Bit 0 RAME Description 0 On-chip RAM is disabled 1 On-chip RAM is enabled (Initial value) 427 16.3 Operation When the RAME bit is set to 1, the on-chip RAM is enabled. Accesses to the addresses shown in table 16.1 are directed to the on-chip RAM. In modes 1 to 4 (expanded modes), when the RAME bit is cleared to 0, the off-chip address space is accessed. Since the on-chip RAM is connected to the CPU by an internal 16-bit data bus, it can be written and read by word access. It can also be written and read by byte access. Byte data is accessed in two states using the upper 8 bits of the data bus. Word data starting at an even address is accessed in two states using all 16 bits of the data bus. 428 Section 17 Clock Pulse Generator 17.1 Overview The H8/3008 has a built-in clock pulse generator (CPG) that generates the system clock () and other internal clock signals (/2 to /4096). After duty adjustment, a frequency divider divides the clock frequency to generate the system clock (). The system clock is output at the pin*1 and furnished as a master clock to prescalers that supply clock signals to the on-chip supporting modules. Frequency division ratios of 1/1, 1/2, 1/4, and 1/8 can be selected for the frequency divider by settings in a division control register (DIVCR)*2. Power consumption in the chip is reduced in almost direct proportion to the frequency division ratio. Notes: *1 Usage of the pin differs depending on the chip operating mode and the PSTOP bit setting in the module standby control register (MSTCR). For details, see section 18.7, System Clock Output Disabling Function. *2 The division ratio of the frequency divider can be changed dynamically during operation. The clock output at the pin also changes when the division ratio is changed. The frequency output at the pin is shown below. = EXTAL x n where, EXTAL: Frequency of crystal resonator or external clock signal n: Frequency division ratio (n = 1/1, 1/2, 1/4, or 1/8) 17.1.1 Block Diagram Figure 17.1 shows a block diagram of the clock pulse generator. CPG XTAL Oscillator EXTAL Duty adjustment circuit Frequency divider Prescalers Division control register Data bus pin /2 to /4096 Figure 17.1 Block Diagram of Clock Pulse Generator 429 17.2 Oscillator Circuit Clock pulses can be supplied by connecting a crystal resonator, or by input of an external clock signal. 17.2.1 Connecting a Crystal Resonator Circuit Configuration: A crystal resonator can be connected as in the example in figure 17.2. Damping resistance Rd should be selected according to table 17.1 (1), and external capacitances C L1 and CL2 according to table 17.1 (2). An AT-cut parallel-resonance crystal should be used. CL1 EXTAL XTAL Rd CL2 Figure 17.2 Connection of Crystal Resonator (Example) If a crystal resonator with a frequency higher than 20 MHz is connected, the external load capacitance values in table 17.1 (2) should not exceed 10 [pF]. Also, in order to improve the accuracy of the oscillation frequency, a thorough study of oscillation matching evaluation, etc., should be carried out when deciding the circuit constants. Table 17.1 (1) Damping Resistance Value Damping Resistance Value 2 2 < f 4 4 < f 8 8 < f 10 10 < f 13 13 < f 16 16 < f 18 18 < f 25 Rd () 500 1k Frequency f (MHz) 200 0 0 0 0 0 Note: A crystal resonator between 2 MHz and 25 MHz can be used. If the chip is to be operated at less than 2 MHz, the on-chip frequency divider should be used. (A crystal resonator of less than 2 MHz cannot be used.) Table 17.1 (2) External Capacitance Values External Capacitance Value 5 V Version Frequency f (MHz) 20 < f 25 2 f 20 2 f 16 16 f 25 CL1 = CL2 (pF) 10 10 to 22 22 10 430 3 V Version Crystal Resonator: Figure 17.3 shows an equivalent circuit of the crystal resonator. The crystal resonator should have the characteristics listed in table 17.2. CL L Rs XTAL EXTAL C AT-cut parallel-resonance type 0 Figure 17.3 Crystal Resonator Equivalent Circuit Table 17.2 Crystal Resonator Parameters Frequency (MHz) 2 4 8 10 12 16 18 20 25 Rs max () 500 120 80 70 60 50 40 40 40 Co (pF) 7 pF max Use a crystal resonator with a frequency equal to the system clock frequency (). Notes on Board Design: When a crystal resonator is connected, the following points should be noted: Other signal lines should be routed away from the oscillator circuit to prevent induction from interfering with correct oscillation. See figure 17.4. When the board is designed, the crystal resonator and its load capacitors should be placed as close as possible to the XTAL and EXTAL pins. Avoid C Signal A Signal B H8/3008 L2 XTAL EXTAL C L1 Figure 17.4 Oscillator Circuit Block Board Design Precautions 431 17.2.2 External Clock Input Circuit Configuration: An external clock signal can be input as shown in the examples in figure 17.5. If the XTAL pin is left open, the stray capacitance should not exceed 10 pF. If the stray capacitance at the XTAL pin exceeds 10 pF in configuration a, use the connection shown in configuration b instead, and hold the external clock high in standby mode. External clock input EXTAL XTAL Open a. XTAL pin left open EXTAL External clock input XTAL b. Complementary clock input at XTAL pin Figure 17.5 External Clock Input (Examples) External Clock: The external clock frequency should be equal to the system clock frequency when not divided by the on-chip frequency divider. Table 17.3 shows the clock timing, figure 17.6 shows the external clock input timing, and figure 17.7 shows the external clock output settling delay timing. When the appropriate external clock is input via the EXTAL pin, its waveform is corrected by the on-chip oscillator and duty adjustment circuit. When the appropriate external clock is input via the EXTAL pin, its waveform is corrected by the on-chip oscillator and duty adjustment circuit. The resulting stable clock is output to external devices after the external clock settling time (tDEXT) has passed after the clock input. The system must remain reset with the reset signal low during tDEXT, while the clock output is unstable. 432 Table 17.3 Clock Timing (Preliminary) VCC = 3.0 V to 3.6 V VCC = 5.0 V 10% Item Symbol Min Max Min Max Unit Test Conditions External clock input low pulse width t EXL 15 -- 15 -- ns Figure 17.6 External clock input high pulse width t EXH 15 -- 15 -- ns External clock rise time t EXr -- 5 -- 5 ns External clock fall time t EXf -- 5 -- 5 ns Clock low pulse width t CL 0.4 0.6 0.4 0.6 t cyc 80 -- 80 -- ns 5 MHz Figure 19.17 < 5 MHz 0.4 0.6 0.4 0.6 t cyc 5 MHz 80 -- 80 -- ns < 5 MHz 500 -- 500 -- s Figure 17.7 Clock high pulse width External clock output settling delay time t CH t DEXT* Note: * t DEXT includes a RES pulse width (t RESW). tRESW = 20 tcyc tEXH tEXL VCC x 0.7 EXTAL VCC x 0.5 0.3 V tEXr tEXf Figure 17.6 External Clock Input Timing 433 VCC STBY VIH EXTAL (internal or external) RES tDEXT Figure 17.7 External Clock Output Settling Delay Timing 17.3 Duty Adjustment Circuit When the oscillator frequency is 5 MHz or higher, the duty adjustment circuit adjusts the duty cycle of the clock signal from the oscillator to generate . 17.4 Prescalers The prescalers divide the system clock () to generate internal clocks (/2 to /4096). 17.5 Frequency Divider The frequency divider divides the duty-adjusted clock signal to generate the system clock (). The frequency division ratio can be changed dynamically by modifying the value in DIVCR, as described below. Power consumption in the chip is reduced in almost direct proportion to the frequency division ratio. The system clock generated by the frequency divider can be output at the pin. 434 17.5.1 Register Configuration Table 17.4 summarizes the frequency division register. Table 17.4 Frequency Division Register Address* Name Abbreviation R/W Initial Value H'EE01B Division control register DIVCR R/W H'FC Note: * Lower 20 bits of the address in advanced mode. 17.5.2 Division Control Register (DIVCR) DIVCR is an 8-bit readable/writable register that selects the division ratio of the frequency divider. Bit 7 6 5 4 3 2 1 0 -- -- -- -- -- -- DIV1 DIV0 Initial value 1 1 1 1 1 1 0 0 Read/Write -- -- -- -- -- -- R/W R/W Reserved bits Divide bits 1 and 0 These bits select the frequency division ratio DIVCR is initialized to H'FC by a reset and in hardware standby mode. It is not initialized in software standby mode. Bits 7 to 2--Reserved: These bits cannot be modified and are always read as 1. Bits 1 and 0--Divide (DIV1, DIV0): These bits select the frequency division ratio, as follows. Bit 1 DIV1 Bit 0 DIV0 Frequency Division Ratio 0 0 1/1 0 1 1/2 1 0 1/4 1 1 1/8 (Initial value) 435 17.5.3 Usage Notes The DIVCR setting changes the frequency, so note the following points. * Select a frequency division ratio that stays within the assured operation range specified for the clock cycle time tcyc in the AC electrical characteristics. Note that omin = lower limit of the operating frequency range. Ensure that o is not below this lower limit. * All on-chip module operations are based on . Note that the timing of timer operations, serial communication, and other time-dependent processing differs before and after any change in the division ratio. The waiting time for exit from software standby mode also changes when the division ratio is changed. For details, see section 18.4.3, Selection of Waiting Time for Exit from Software Standby Mode. 436 Section 18 Power-Down State 18.1 Overview The H8/3008 has a power-down state that greatly reduces power consumption by halting the CPU, and a module standby function that reduces power consumption by selectively halting on-chip modules. The power-down state includes the following three modes: * Sleep mode * Software standby mode * Hardware standby mode The module standby function can halt on-chip supporting modules independently of the powerdown state. The modules that can be halted are the 16-bit timer, 8-bit timer, SCI0, SCI1, and A/D converter. Table 18.1 indicates the methods of entering and exiting the power-down modes and module standby mode, and gives the status of the CPU and on-chip supporting modules in each mode. 437 438 Halted Halted Active SLEEP instruction executed while SSBY = 1 in SYSCR Low input at STBY pin Corresponding bit set to 1 in MSTCRH and MSTCRL Software standby mode Hardware standby mode Module standby Active Halted Halted Halted CPU -- Undetermined Held Held CPU Registers SCI1 Active Halted and reset Halted and reset Active Halted and reset Halted and reset Active Halted and reset Halted and reset State SCI0 8-Bit Timer Halted and reset Halted and reset Active A/D Halted and reset Halted and reset Active Other Modules Halted*1 Halted*1 Halted*1 Halted*1 Halted*1 Active and and and and and reset reset reset reset reset Halted and reset Halted and reset Active 16-Bit Timer -- * NMI * IRQ0 to IRQ2 * RES * STBY * Interrupt * RES * STBY Exiting Conditions -- High impedance*1 * STBY * RES * Clear MSTCR bit to 0*4 High * STBY impedance * RES Held Held output High output I/O Ports clock Output*3 Held*2 High impedance Held Held RAM Legend SYSCR: SSBY: MSTCRH: MSTCRL: System control register Software standby bit Module standby control register H Module standby control register L Notes: *1 State in which the corresponding MSTCR bit was set to 1. For details see section 18.2.2, Module Standby Control Register H (MSTCRH) and section 18.2.3, Module Standby Control Register L (MSTCRL). *2 The RAME bit must be cleared to 0 in SYSCR before the transition from the program execution state to hardware standby mode. *3 When P67 is used as the output pin. *4 When a MSTCR bit is set to 1, the registers of the corresponding on-chip supporting module are initialized. To restart the module, first clear the MSTCR bit to 0, then set up the module registers again. Active SLEEP instruction executed while SSBY = 0 in SYSCR Clock Sleep mode Mode Entering Conditions Table 18.1 Power-Down State and Module Standby Function 18.2 Register Configuration The H8/3008 has a system control register (SYSCR) that controls the power-down state, and module standby control registers H (MSTCRH) and L (MSTCRL) that control the module standby function. Table 18.2 summarizes these registers. Table 18.2 Control Register Address* Name Abbreviation R/W Initial Value H'EE012 System control register SYSCR R/W H'09 H'EE01C Module standby control register H MSTCRH R/W H'78 H'EE01D Module standby control register L MSTCRL R/W H'00 Note: * Lower 20 bits of the address in advanced mode. 18.2.1 System Control Register (SYSCR) Bit 7 6 5 4 3 2 1 0 SSBY STS2 STS1 STS0 UE NMIEG SSOE RAME Initial value 0 0 0 0 1 0 0 1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W RAM enable Software standby output port enable NMI edge select User bit enable Standby timer select 2 to 0 These bits select the waiting time of the CPU and peripheral functions Software standby Enables transition to software standby mode SYSCR is an 8-bit readable/writable register. Bit 7 (SSBY), bits 6 to 4 (STS2 to STS0), and bit 1 (SSOE) control the power-down state. For information on the other SYSCR bits, see section 3.3, System Control Register (SYSCR). 439 Bit 7--Software Standby (SSBY): Enables transition to software standby mode. When software standby mode is exited by an external interrupt, this bit remains set to 1 after the return to normal operation. To clear this bit, write 0. Bit 7 SSBY Description 0 SLEEP instruction causes transition to sleep mode 1 SLEEP instruction causes transition to software standby mode (Initial value) Bits 6 to 4--Standby Timer Select (STS2 to STS0): These bits select the length of time the CPU and on-chip supporting modules wait for the clock to settle when software standby mode is exited by an external interrupt. If the clock is generated by a crystal resonator, set these bits according to the clock frequency so that the waiting time will be at least 7 ms. See table 18.3. Set these bits according to the operating frequency so that the waiting time will be at least 100 s. Bit 6 STS2 Bit 5 STS1 Bit 4 STS0 Description 0 0 0 Waiting time = 8,192 states 1 Waiting time = 16,384 states 0 Waiting time = 32,768 states 1 Waiting time = 65,536 states 1 1 0 0 Waiting time = 131,072 states 1 0 1 Waiting time = 262,144 states 1 1 0 Waiting time = 1,024 states 1 1 1 Illegal setting (Initial value) Bit 1--Software Standby Output Port Enable (SSOE): Specifies whether the address bus and bus control signals (CS0 to CS7, AS, RD, HWR, and LWR) are kept as outputs or fixed high, or placed in the high-impedance state in software standby mode. Bit 1 SSOE Description 0 In software standby mode, the address bus and bus control signals are all high-impedance 1 In software standby mode, the address bus retains its output state and bus control signals are fixed high 440 (Initial value) 18.2.2 Module Standby Control Register H (MSTCRH) MSTCRH is an 8-bit readable/writable register that controls output of the system clock (). It also controls the module standby function, which places individual on-chip supporting modules in the standby state. Module standby can be designated for the SCI0, SCI1. Bit 7 6 5 4 3 2 PSTOP -- -- -- -- -- Initial value 0 1 1 1 1 0 0 0 Read/Write R/W -- -- -- -- R/W R/W R/W Reserved bits 1 0 MSTPH1 MSTPH0 Module standby H1 to 0 These bits select modules to be placed in standby clock stop Enables or disables output of the system clock MSTCRH is initialized to H'78 by a reset and in hardware standby mode. It is not initialized in software standby mode. Bit 7-- Clock Stop (PSTOP): Enables or disables output of the system clock (). Bit 7 PSTOP Description 0 System clock output is enabled 1 System clock output is disabled (Initial value) Bits 6 to 3--Reserved: These bits cannot be modified and are always read as 1. Bit 2--Reserved: This bit can be written and read. Bit 1--Module Standby H1 (MSTPH1): Selects whether to place the SCI1 in standby. Bit 1 MSTPH1 Description 0 SCI1 operates normally 1 SCI1 is in standby state (Initial value) 441 Bit 0--Module Standby H0 (MSTPH0): Selects whether to place the SCI0 in standby. Bit 0 MSTPH0 Description 0 SCI0 operates normally 1 SCI0 is in standby state 18.2.3 (Initial value) Module Standby Control Register L (MSTCRL) MSTCRL is an 8-bit readable/writable register that controls the module standby function, which places individual on-chip supporting modules in the standby state. Module standby can be designated for 16-bit timer, 8-bit timer, and A/D converter modules. Bit 7 6 5 -- -- -- Initial value 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W 4 3 2 1 0 -- MSTPL0 0 0 0 R/W R/W R/W MSTPL4 MSTPL3 MSTPL2 Module standby L4 to L2, L0 These bits select modules to be placed in standby Reserved bits MSTCRL is initialized to H'00 by a reset and in hardware standby mode. It is not initialized in software standby mode. Bits 7 to 5--Reserved: This bit can be written and read. Bit 4--Module Standby L4 (MSTPL4): Selects whether to place the 16-bit timer in standby. Bit 4 MSTPL4 Description 0 16-bit timer operates normally 1 16-bit timer is in standby state 442 (Initial value) Bit 3--Module Standby L3 (MSTPL3): Selects whether to place 8-bit timer channels 0 and 1 in standby. Bit 3 MSTPL3 Description 0 8-bit timer channels 0 and 1 operate normally 1 8-bit timer channels 0 and 1 are in standby state (Initial value) Bit 2--Module Standby L2 (MSTPL2): Selects whether to place 8-bit timer channels 2 and 3 in standby. Bit 2 MSTPL2 Description 0 8-bit timer channels 2 and 3 operate normally 1 8-bit timer channels 2 and 3 are in standby state (Initial value) Bit 1--Reserved: This bit can be written and read. Bit 0--Module Standby L0 (MSTPL0): Selects whether to place the A/D converter in standby. Bit 0 MSTPL0 Description 0 A/D converter operates normally 1 A/D converter is in standby state (Initial value) 443 18.3 Sleep Mode 18.3.1 Transition to Sleep Mode When the SSBY bit is cleared to 0 in SYSCR, execution of the SLEEP instruction causes a transition from the program execution state to sleep mode. Immediately after executing the SLEEP instruction the CPU halts, but the contents of its internal registers are retained. On-chip supporting modules do not halt in sleep mode. Modules which have been placed in standby by the module standby function, however, remain halted. 18.3.2 Exit from Sleep Mode Sleep mode is exited by an interrupt, or by input at the RES or STBY pin. Exit by Interrupt: An interrupt terminates sleep mode and causes a transition to the interrupt exception handling state. Sleep mode is not exited by an interrupt source in an on-chip supporting module if the interrupt is disabled in the on-chip supporting module. Sleep mode is not exited by an interrupt other than NMI if the interrupt is masked by interrupt priority settings and the settings of the I and UI bits in CCR, IPR. Exit by RES Input: Low input at the RES pin exits from sleep mode to the reset state. Exit by STBY Input: Low input at the STBY pin exits from sleep mode to hardware standby mode. 18.4 Software Standby Mode 18.4.1 Transition to Software Standby Mode To enter software standby mode, execute the SLEEP instruction while the SSBY bit is set to 1 in SYSCR. In software standby mode, current dissipation is reduced to an extremely low level because the CPU, clock, and on-chip supporting modules all halt. On-chip supporting modules are reset and halted. As long as the specified voltage is supplied, however, CPU register contents and on-chip RAM data are retained. The settings of the I/O ports also held. When the WDT is used as a watchdog timer (WT/IT = 1), the TME bit must be cleared to 0 before setting SSBY. Also, when setting TME to 1, SSBY should be cleared to 0. Clear the BRLE bit in BRCR (inhibiting bus release) before making a transition to software standby mode. 444 18.4.2 Exit from Software Standby Mode Software standby mode can be exited by input of an external interrupt at the NMI, IRQ0, IRQ1, or IRQ2 pin, or by input at the RES or STBY pin. Exit by Interrupt: When an NMI, IRQ0, IRQ1, or IRQ2 interrupt request signal is received, the clock oscillator begins operating. After the oscillator settling time selected by bits STS2 to STS0 in SYSCR, stable clock signals are supplied to the entire chip, software standby mode ends, and interrupt exception handling begins. Software standby mode is not exited if the interrupt enable bits of interrupts IRQ0, IRQ1, and IRQ2 are cleared to 0, or if these interrupts are masked in the CPU. Exit by RES Input: When the RES input goes low, the clock oscillator starts and clock pulses are supplied immediately to the entire chip. The RES signal must be held low long enough for the clock oscillator to stabilize. When RES goes high, the CPU starts reset exception handling. Exit by STBY Input: Low input at the STBY pin causes a transition to hardware standby mode. 18.4.3 Selection of Waiting Time for Exit from Software Standby Mode Bits STS2 to STS0 in SYSCR and bits DIV1 and DIV0 in DIVCR should be set as follows. Crystal Resonator: Set STS2 to STS0, DIV1, and DIV0 so that the waiting time (for the clock to stabilize) is at least 7 ms. Table 18.3 indicates the waiting times that are selected by STS2 to STS0, DIV1, and DIV0 settings at various system clock frequencies. When Using an External Clock: Set the STS2 to STS0, DIV0, and DIV1 bits so that the waiting time is at least 100 s. 445 Table 18.3 Clock Frequency and Waiting Time for Clock to Settle DIV1 DIV0 STS2 STS1 STS0 Waiting Time 0 0 0 0 0 8192 states 0 0 1 16384 states 0 1 0 32768 states 0 1 1 65536 states 1 0 0 131072 states 1 0 1 262144 states 1 1 0 1024 states 1 1 1 0 1 0 0 0 8192 states 0 0 1 16384 states 0 1 0 32768 states 0 1 1 65536 states 1 0 0 131072 states 1 0 1 262144 states 1 1 0 1024 states 1 1 1 1 0 0 0 0 8192 states 0 0 1 16384 states 0 1 0 32768 states 0 1 1 65536 states 1 0 0 131072 states 1 0 1 262144 states 1 1 0 1024 states 1 1 1 1 1 0 0 0 8192 states 0 0 1 16384 states 0 1 0 32768 states 0 1 1 65536 states 1 0 0 131072 states 1 0 1 262144 states 1 1 0 1024 states 1 1 1 * : Recommended setting 446 25 MHz 0.3 0.7 1.3 2.6 5.2 10.5* 0.04 20 MHz 0.4 0.8 1.6 3.3 6.6 13.1* 0.05 18 MHz 0.46 0.91 1.8 3.6 7.3* 14.6 0.057 16 MHz 0.51 1.0 2.0 4.1 8.2* 16.4 0.064 0.7 1.3 2.6 5.2 10.5* 21.0 0.08 0.8 1.6 3.3 6.6 13.1* 26.2 0.10 0.91 1.8 3.6 7.3* 14.6 29.1 0.11 1.02 2.0 4.1 8.2* 16.4 32.8 0.13 1.3 2.6 5.2 10.5* 21.0 41.9 0.16 1.6 3.3 6.6 13.1* 26.2 52.4 0.20 1.8 3.6 7.3* 14.6 29.1 58.3 0.23 2.0 4.1 8.2* 16.4 32.8 65.5 0.26 2.6 5.2 10.5* 21.0 41.9 83.9 0.33 3.3 6.6 13.1 26.2 52.4 104.9 0.41 3.6 7.3* 14.6 29.1 58.3 116.5 0.46 4.1 8.2* 16.4 32.8 65.5 131.1 0.51 12 MHz 10 MHz 0.65 0.8 1.3 1.6 2.7 3.3 5.5 6.6 10.9* 13.1* 21.8 26.2 0.085 0.10 Illegal setting 1.4 1.6 2.7 3.3 5.5 6.6 10.9* 13.1* 21.8 26.2 43.7 52.4 0.17 0.20 Illegal setting 2.7 3.3 5.5 6.6 10.9* 13.1* 21.8 26.2 43.7 52.4 87.4 104.9 0.34 0.41 Illegal setting 5.5 6.6 10.9* 13.1* 21.8 26.2 43.7 52.4 87.4 104.9 174.8 209.7 0.68 0.82 Illegal setting 8 MHz 6 MHz 4 MHz 1.0 1.3 2.0 2.0 2.7 4.1 4.1 5.5 8.2* 8.2* 10.9* 16.4 16.4 21.8 32.8 32.8 43.7 65.5 0.13 0.17 0.26 2 MHz 1MHz Unit 8.2* ms 4.1 8.2* 16.4 16.4 32.8 32.8 65.5 65.5 131.1 131.1 262.1 0.51 1.0 2.0 4.1 8.2* 16.4 32.8 65.5 0.26 2.7 5.5 10.9* 21.8 43.7 87.4 0.34 4.0 8.2* 16.4 32.8 65.5 131.1 0.51 8.2* 16.4 32.8 65.5 131.1 262.1 1.0 16.4* ms 32.8 65.5 131.1 262.1 524.3 2.0 4.1 8.2* 16.4 32.8 65.5 131.1 0.51 5.5 10.9* 21.8 43.7 87.4 174.8 0.68 8.2* 16.4 32.8 65.5 131.1 262.1 1.02 16.4* 32.8 65.5 131.1 262.1 524.3 2.0 32.8* ms 65.5 131.1 262.1 524.3 1048.6 4.1 8.2* 16.4 32.8 65.5 131.1 262.1 1.0 10.9* 21.8 43.7 87.4 174.8 349.5 1.4 16.4* 32.8 65.5 131.1 262.1 524.3 2.0 32.8* 65.5 ms 65.5 131.1 131.1 262.1 262.1 524.3 524.3 1048.6 1048.6 2097.1 8.2* 4.1 18.4.4 Sample Application of Software Standby Mode Figure 18.1 shows an example in which software standby mode is entered at the fall of NMI and exited at the rise of NMI. With the NMI edge select bit (NMIEG) cleared to 0 in SYSCR (selecting the falling edge), an NMI interrupt occurs. Next the NMIEG bit is set to 1 (selecting the rising edge) and the SSBY bit is set to 1; then the SLEEP instruction is executed to enter software standby mode. Software standby mode is exited at the next rising edge of the NMI signal. Clock oscillator NMI NMIEG SSBY NMI interrupt handler NMIEG = 1 SSBY = 1 Software standby mode (powerdown state) Oscillator settling time (tosc2) NMI exception handling SLEEP instruction Figure 18.1 NMI Timing for Software Standby Mode (Example) 18.4.5 Note The I/O ports retain their existing states in software standby mode. If a port is in the high output state, its output current is not reduced. 447 18.5 Hardware Standby Mode 18.5.1 Transition to Hardware Standby Mode Regardless of its current state, the chip enters hardware standby mode whenever the STBY pin goes low. Hardware standby mode reduces power consumption drastically by halting all functions of the CPU, and on-chip supporting modules. All modules are reset except the on-chip RAM. As long as the specified voltage is supplied, on-chip RAM data is retained. I/O ports are placed in the high-impedance state. Clear the RAME bit to 0 in SYSCR before STBY goes low to retain on-chip RAM data. The inputs at the mode pins (MD2 to MD0) should not be changed during hardware standby mode. 18.5.2 Exit from Hardware Standby Mode Hardware standby mode is exited by inputs at the STBY and RES pins. While RES is low, when STBY goes high, the clock oscillator starts running. RES should be held low long enough for the clock oscillator to settle. When RES goes high, reset exception handling begins, followed by a transition to the program execution state. 18.5.3 Timing for Hardware Standby Mode Figure 18.2 shows the timing relationships for hardware standby mode. To enter hardware standby mode, first drive RES low, then drive STBY low. To exit hardware standby mode, first drive STBY high, wait for the clock to settle, then bring RES from low to high. Clock oscillator RES STBY Oscillator settling time Reset exception handling Figure 18.2 Hardware Standby Mode Timing 448 18.6 Module Standby Function 18.6.1 Module Standby Timing The module standby function can halt several of the on-chip supporting modules (SCI1, SCI0, 16bit timer, 8-bit timer, and A/D converter) independently in the power-down state. This standby function is controlled by bits MSTPH2 to MSTPH0 in MSTCRH and bits MSTPL7 to MSTPL0 in MSTCRL. When one of these bits is set to 1, the corresponding on-chip supporting module is placed in standby and halts at the beginning of the next bus cycle after the MSTCR write cycle. 18.6.2 Read/Write in Module Standby When an on-chip supporting module is in module standby, read/write access to its registers is disabled. Read access always results in H'FF data. Write access is ignored. 18.6.3 Usage Notes When using the module standby function, note the following points. On-chip Supporting Module Interrupts: Before setting a module standby bit, first disable interrupts by that module. When an on-chip supporting module is placed in standby by the module standby function, its registers are initialized, including registers with interrupt request flags. Pin States: Pins used by an on-chip supporting module lose their module functions when the module is placed in module standby. What happens after that depends on the particular pin. For details, see section 7, I/O Ports. Pins that change from the input to the output state require special care. For example, if SCI1 is placed in module standby, the receive data pin loses its receive data function and becomes a port pin. If its port DDR bit is set to 1, the pin becomes a data output pin, and its output may collide with external SCI transmit data. Data collision should be prevented by clearing the port DDR bit to 0 or taking other appropriate action. Register Resetting: When an on-chip supporting module is halted by the module standby function, all its registers are initialized. To restart the module, after its MSTCR bit is cleared to 0, its registers must be set up again. It is not possible to write to the registers while the MSTCR bit is set to 1. 449 18.7 System Clock Output Disabling Function Output of the system clock () can be controlled by the PSTOP bit in MSTCRH. When the PSTOP bit is set to 1, output of the system clock halts and the pin is placed in the highimpedance state. Figure 18.3 shows the timing of the stopping and starting of system clock output. When the PSTOP bit is cleared to 0, output of the system clock is enabled. Table 18.4 indicates the state of the pin in various operating states. MSTCRH write cycle MSTCRH write cycle (PSTOP = 1) (PSTOP = 0) T1 T2 T3 T1 T2 T3 pin High impedance Figure 18.3 Starting and Stopping of System Clock Output Table 18.4 Pin State in Various Operating States Operating State PSTOP = 0 PSTOP = 1 Hardware standby High impedance High impedance Software standby Always high High impedance Sleep mode System clock output High impedance Normal operation System clock output High impedance 450 Section 19 Electrical Characteristics 19.1 Absolute Maximum Ratings Table 19.1 lists the absolute maximum ratings. Table 19.1 Absolute Maximum Ratings Item Symbol Value Unit Power supply voltage VCC 5 V version: -0.3 to +7.0 V 3 V version: -0.3 to +4.6 V Input voltage (except for port 7) Vin -0.3 to VCC +0.3 V Input voltage (port 7) Vin -0.3 to AVCC +0.3 V Reference voltage VREF -0.3 to AVCC +0.3 V Analog power supply voltage AVCC 5 V version: -0.3 to +7.0 V 3 V version: -0.3 to +4.6 V Analog input voltage VAN -0.3 to AVCC +0.3 V Operating temperature Topr Regular specifications: -20 to +75 C Wide-range specifications: -40 to +85 C -55 to +125 C Storage temperature Tstg Caution: Permanent damage to the chip may result if absolute maximum ratings are exceeded. 451 19.2 DC Characteristics Table 19.2 lists the DC characteristics. Table 19.3 lists the permissible output currents. Table 19.2 DC Characteristics (1) Conditions: VCC = 5.0 V 10%, AVCC = 5.0 V 10%, VREF = 4.5 V to AVCC*1, VSS = AVSS = 0 V*1, Ta = -20C to +75C (regular specifications), Ta = -40C to +85C (wide-range specifications) Item Symbol Min Typ Max Unit 1.0 -- -- V -- -- VCC x 0.7 V VT - VT 0.4 -- -- V VIH VCC - 0.7 -- VCC + 0.3 V EXTAL VCC x 0.7 -- VCC + 0.3 V Port 7 2.0 -- AVCC + 0.3 V Ports 4 to 6, P83, P84, P90 to P95, port B 2.0 -- VCC + 0.3 V -0.3 -- 0.5 V NMI, EXTAL, ports 4 to 7, P83, P84, P90 to P95, port B -0.3 -- 0.8 V Output high voltage All output pins VOH (except RESO) VCC - 0.5 -- -- V 3.5 -- -- V I OH = -1 mA Output low voltage All output pins VOL (except RESO) -- -- 0.4 V I OL = 1.6 mA A0 to A 19 -- -- 1.0 V I OL = 10 mA RESO -- -- 0.4 V I OL = 1.6 mA -- -- 1.0 A Vin = 0.5 V to VCC - 0.5 V -- -- 1.0 A Vin = 0.5 V to AVCC - 0.5 V Schmitt trigger Port A, input voltages P80 to P8 2 - VT + VT + Input high voltage Input low voltage RES, STBY, NMI, MD2 to MD0 RES, STBY, MD2 to MD0 Input leakage STBY, NMI, current RES, MD2 to MD0 Port 7 452 VIL |Iin| - Test Conditions I OH = -200 A Item Three-state leakage current Ports 4 to 6, A0 to A 19 , Ports 8 to B Symbol Min Typ Max Unit Test Conditions |ITSI| -- -- 1.0 A Vin = 0.5 V to VCC - 0.5 V -- -- 10.0 A Vin = 0 V RESO Input pull-up MOS current Ports 4 and 5 -I p 50 -- 300 A Vin = 0 V Input capacitance NMI Cin -- -- 50 pF -- -- 15 pF Vin = 0 V f = fmin Ta = 25C Current dissipation*2 Normal operation -- 32 47 (5.0 V) mA f = 20 MHz -- 37 58 (5.0 V) mA f = 25 MHz -- 24 38 (5.0 V) mA f = 20 MHz -- 29 47 (5.0 V) mA f = 25 MHz -- 19 31 (5.0 V) mA f = 20 MHz -- 21 37 (5.0 V) mA f = 25 MHz -- 1.0 10 A Ta 50C -- -- 80 A 50C < Ta -- 0.6 1.5 mA During A/D and D/A conversion -- 0.6 1.5 mA Idle -- 0.01 5.0 A -- 0.45 0.8 mA During A/D and D/A conversion -- 2.0 3.0 mA Idle -- 0.01 5.0 A 2.0 -- -- V All input pins except NMI I CC* 3 Sleep mode Module standby mode Standby mode Analog power During A/D supply current conversion Reference current During A/D conversion RAM standby voltage AI CC AI CC VRAM DASTE = 0 DASTE = 0 Notes: *1 Do not open the pin connections of the AV CC, VREF and AVSS pins while the A/D converter is not in use. 453 Connect the AVCC and VREF pins to the V CC and connect the AVSS pin to the VSS , respectively. *2 Given current consumption values are when all the output pins are made to unloaded state and, furthermore, when the on-chip pull-up MOS is turned off under conditions that V IH min = VCC - 0.5 V and VIL max = 0.5 V. Also, the aforesaid current consumption values are when VIH min = VCC x 0.9 and VIL max = 0.3 V under the condition of VRAM V CC < 4.5 V. *3 I CC max. (under normal operations) = 3.0 (mA) + 0.40 (mA/(MHz x V)) x V CC x f I CC max. (when using the sleeve) = 3.0 (mA) + 0.32 (mA/(MHz x V)) x V CC x f I CC max. (when the sleeve + module are standing by) = 3.0 (mA) + 0.25 (mA/(MHz x V)) x V CC x f Also, the typ. values for current dissipation are reference values. 454 Table 19.2 DC Characteristics (2) Conditions: VCC = 3.0 to 3.6 V, AVCC = 3.0 to 3.6 V, VREF = 3.0 V to AVCC*1, VSS = AVSS = 0 V*1, Ta = -20C to +75C (regular specifications), Ta = -40C to +85C (wide-range specifications) Item Symbol Schmitt trigger Port A, input voltages P80 to P8 2 - VT + VT Input low voltage Output high voltage Output low voltage Typ Max Unit VCC x 0.2 -- -- V -- -- VCC x 0.7 V Test Conditions VT - VT VCC x 0.05 -- -- V VIH VCC x 0.9 -- VCC + 0.3 V EXTAL VCC x 0.7 -- VCC + 0.3 V Port 7 VCC x 0.7 -- AVCC + 0.3 V Ports 4 to 6 P83, P84, P90 to P95, port B VCC x 0.7 -- VCC + 0.3 V -0.3 -- VCC x 0.1 V NMI, EXTAL, ports 4 to 7 P83, P84, P90 to P95, port B -0.3 -- VCC x 0.2 V All output pins VOH (except RESO) VCC - 0.5 -- -- V I OH = -200 A VCC - 1.0 -- -- V I OH = -1 mA All output pins VOL (except RESO) -- -- 0.4 V I OL = 1.6 mA A0 to A 19 -- -- 1.0 V I OL = 5 mA RESO -- -- 0.4 V I OL = 1.6 mA -- -- 1.0 A Vin = 0.5 V to VCC - 0.5 V -- -- 1.0 A Vin = 0.5 V to AVCC - 0.5 V + Input high voltage Min RES, STBY, NMI, MD2 to MD0 RES, STBY, MD2 to MD0 Input leakage STBY, NMI, current RES, MD2 to MD0 Port 7 VIL |Iin| - 455 Item Three-state leakage current Ports 4 to 6, A0 to A 19 , Ports 8 to B Symbol Min Typ Max Unit Test Conditions |ITSI| -- -- 1.0 A Vin = 0.5 V to VCC - 0.5 V -- -- 10.0 A Vin = 0 V RESO Input pull-up MOS current Ports 4 and 5 -I p 10 -- 300 A Vin = 0 V Input capacitance NMI Cin -- -- 50 pF -- -- 15 pF Vin = 0 V f = fmin Ta = 25C Current dissipation*2 Normal operation -- 37 58 (3.3 V) mA f = 25 MHz Sleep mode -- 29 47 (3.3 V) mA f = 25 MHz Module standby mode -- 21 37 (3.3 V) mA f = 25 MHz Standby mode -- TBD 10 A Ta 50C -- -- 80 A 50C < Ta -- 0.6 0.5 mA AVCC = 3.0 V During A/D and D/A conversion -- 0.6 0.5 mA AVCC = 3.0 V Idle -- 0.01 5.0 A DASTE = 0 -- 0.45 0.8 mA VREF = 3.0 V During A/D and D/A conversion -- 2.0 3.0 mA VREF = 3.0 V Idle -- 0.01 5.0 A DASTE = 0 2.0 -- -- V All input pins except NMI Analog power During A/D supply current conversion Reference current During A/D conversion RAM standby voltage I CC* 3 AI CC AI CC VRAM Notes: *1 Do not open the pin connections of the AV CC, VREF and AVSS pins while the A/D converter is not in use. Connect the AVCC and VREF pins to the V CC and connect the AVSS pin to the VSS , respectively. *2 Given current consumption values are when all the output pins are made to unloaded state and, furthermore, when the on-chip pull-up MOS is turned off under conditions that V IH min = VCC - 0.5 V and VIL max = 0.5 V. Also, the aforesaid current consumption values are when VIH min = VCC x 0.9 and VIL max = 0.3 V under the condition of VRAM V CC < 3.0 V. 456 *3 I CC max. (under normal operations) = 3.0 (mA) + 0.61 (mA/(MHz x V)) x V CC x f I CC max. (when using the sleeve) = 3.0 (mA) + 0.49 (mA/(MHz x V)) x V CC x f I CC max. (when the sleeve + module are standing by) = 3.0 (mA) + 0.38 (mA/(MHz x V)) x V CC x f Also, the typ. values for current dissipation are reference values. 457 Table 19.3 Permissible Output Currents Condition: Ta = -20C to +75C (regular specifications), Ta = -40C to +85C (wide-range specifications) Condition A: VCC = 3.0 to 3.6 V, AVCC = 3.0 to 3.6 V, VREF = 3.0 to AVCC, VSS = AVSS = 0 V Condition B: VCC = 4.5 to 5.5 V, AVCC = 4.5 to 5.5 V, VREF = 4.5 to AVCC, VSS = AVSS = 0 V Condition A, B Item Permissible output low current (per pin) A19 to A 0 Other output pins Permissible output low current (total) Total of 20 pins in A19 to A 0 Symbol Min Typ Max Unit I OL -- -- 10 mA -- -- 2.0 mA -- -- 80 mA -- -- 120 mA IOL Total of all output pins, including the above Permissible output high current (per pin) All output pins |-IOH| -- -- 2.0 mA Permissible output high current (total) Total of all output pins |-IOH| -- -- 40 mA Notes: 1. To protect chip reliability, do not exceed the output current values in table 19.3. 2. When directly driving a darlington pair or LED, always insert a current-limiting resistor in the output line, as shown in figure 19.1. H8/3008 2 k Port Darlington pair Figure 19.1 Darlington Pair Drive Circuit (Example) 458 19.3 AC Characteristics Clock timing parameters are listed in table 19.4, control signal timing parameters in table 19.5, and bus timing parameters in table 19.6. Timing parameters of the on-chip supporting modules are listed in table 19.7. Table 19.4 Clock Timing Condition: Ta = -20C to +75C (regular specifications), Ta = -40C to +85C (wide-range specifications) Condition A: VCC = 3.0 to 3.6 V, AVCC = 3.0 to 3.6 V, VREF = 3.0 to AVCC, VSS = AVSS = 0 V, fmax = 25 MHz Condition B: VCC = 5.0 V 10%, AVCC = 5.0 V 10%, VREF = 4.5 to AVCC, VSS = AVSS = 0 V, fmax = 20 MHz Condition C: VCC = 5.0 V 10%, AVCC = 5.0 V 10%, VREF = 4.5 to AVCC, VSS = AVSS = 0 V, fmax = 25 MHz Condition A B C Item Symbol Min Max Min Max Min Max Test Unit Conditions Clock cycle time t cyc 40 500 50 500 40 500 ns Clock pulse low width t CL 10 -- 15 -- 10 -- ns Clock pulse high width t CH 10 -- 15 -- 10 -- ns Clock rise time t Cr -- 10 -- 10 -- 10 ns Clock fall time t Cf -- 10 -- 10 -- 10 ns Clock oscillator settling time at reset t OSC1 20 -- 20 -- 20 -- ms Figure 19.3 Clock oscillator settling time in software standby t OSC2 7 -- 7 -- 7 -- ms Figure 18.1 Figure 19.3 to figure 19.15 459 Table 19.5 Control Signal Timing Condition: Ta = -20C to +75C (regular specifications), Ta = -40C to +85C (wide-range specifications) Condition A: VCC = 3.0 to 3.6 V, AVCC = 3.0 to 3.6 V, VREF = 3.0 to AVCC, VSS = AVSS = 0 V, fmax = 25 MHz Condition B: VCC = 5.0 V 10%, AVCC = 5.0 V 10%, VREF = 4.5 to AVCC, VSS = AVSS = 0 V, fmax = 20 MHz Condition C: VCC = 5.0 V 10%, AVCC = 5.0 V 10%, VREF = 4.5 to AVCC, VSS = AVSS = 0 V, fmax = 25 MHz Condition A B and C Item Symbol Min Max Min Max Unit Test Conditions RES setup time t RESS 150 -- 150 -- ns Figure 19.4 RES pulse width t RESW 10 -- 10 -- t cyc Mode programming setup time t MDS 200 -- 200 -- ns RESO output delay time t RESD -- 50 -- 50 ns RESO output pulse width t RESOW 132 -- 132 -- t cyc NMI, IRQ setup time t NMIS 150 -- 150 -- ns NMI, IRQ hold time t NMIH 10 -- 10 -- ns NMI, IRQ pulse width (in recovery from software standby mode) t NMIW 200 -- 200 -- ns 460 Figure 19.5 Figure 19.6 Table 19.6 Bus Timing Condition: Ta = -20C to +75C (regular specifications), Ta = -40C to +85C (wide-range specifications) Condition A: VCC = 3.0 to 3.6 V, AVCC = 3.0 to 3.6 V, VREF = 3.0 to AVCC, VSS = AVSS = 0 V, fmax = 25 MHz Condition B: VCC = 5.0 V 10%, AVCC = 5.0 V 10%, VREF = 4.5 to AVCC, VSS = AVSS = 0 V, fmax = 20 MHz Condition C: VCC = 5.0 V 10%, AVCC = 5.0 V 10%, VREF = 4.5 to AVCC, VSS = AVSS = 0 V, fmax = 25 MHz Condition A B and C Item Symbol Min Max Min Max Unit Test Conditions Address delay time t AD -- 25 -- 25 ns Address hold time t AH 0.5 t cyc -- - 20 0.5 t cyc -- - 20 ns Figure 19.7, figure 19.8 Read strobe delay time t RSD -- 25 -- 25 ns Address strobe delay time t ASD -- 25 -- 25 ns Write strobe delay time t WSD -- 25 -- 25 ns Strobe delay time t SD -- 25 -- 25 ns Write strobe pulse width 1 t WSW1 1.0 t cyc -- - 25 1.0 t cyc -- - 25 ns Write strobe pulse width 2 t WSW2 1.5 t cyc -- - 25 1.5 t cyc -- - 25 ns Address setup time 1 t AS1 0.5 t cyc -- - 20 0.5 t cyc -- - 20 ns Address setup time 2 t AS2 1.0 t cyc -- - 20 1.0 t cyc -- - 20 ns Read data setup time t RDS 25 -- 25 -- ns Read data hold time t RDH 0 -- 0 -- ns Write data delay time t WDD -- 35 -- 35 ns Write data setup time 1 t WDS1 1.0 t cyc -- - 30 1.0 t cyc -- - 30 ns Write data setup time 2 t WDS2 2.0 t cyc -- - 30 2.0 t cyc -- - 30 ns Write data hold time t WDH 0.5 t cyc -- - 15 0.5 t cyc -- - 15 ns Figure 19.9, figure 19.10 461 Condition A B and C Item Symbol Min Max Min Max Unit Read data access time 1 t ACC1 -- 2.0 t cyc - 45 -- 2.0 t cyc ns - 45 Read data access time 2 t ACC2 -- 3.0 t cyc - 45 -- 3.0 t cyc ns - 45 Read data access time 3 t ACC3 -- 1.5 t cyc - 45 -- 1.5 t cyc ns - 45 Read data access time 4 t ACC4 -- 2.5 t cyc - 45 -- 2.5 t cyc ns - 45 Precharge time 1 t PCH1 1.0 t cyc -- - 20 1.0 t cyc -- - 20 ns Precharge time 2 t PCH2 0.5 t cyc -- - 20 0.5 t cyc -- - 20 ns Wait setup time t WTS 25 -- 25 -- ns Wait hold time t WTH 5 -- 5 -- ns Bus request setup time t BRQS 25 -- 25 -- ns Bus acknowledge delay time 1 t BACD1 -- 30 -- 30 ns Bus acknowledge delay time 2 t BACD2 -- 30 -- 30 ns Bus-floating time t BZD -- 30 -- 30 ns Test Conditions Figure 19.9, figure 19.10 Figure 19.9 Figure 19.10 Note: In order to secure the address hold time relative to the rise of the RD strobe, address update mode 2 should be used. For details see section 6.3.5, Address Output Method. 462 Table 19.7 Timing of On-Chip Supporting Modules Condition: Ta = -20C to +75C (regular specifications), Ta = -40C to +85C (wide-range specifications) Condition A: VCC = 3.0 to 3.6 V, AVCC = 3.0 to 3.6 V, VREF = 3.0 to AVCC, VSS = AVSS = 0 V, fmax = 25 MHz Condition B: VCC = 5.0 V 10%, AVCC = 5.0 V 10%, VREF = 4.5 to AVCC, VSS = AVSS = 0 V, fmax = 20 MHz Condition C: VCC = 5.0 V 10%, AVCC = 5.0 V 10%, VREF = 4.5 to AVCC, VSS = AVSS = 0 V, fmax = 25 MHz Condition A Module Symbol Min Max Min Max Unit Test Conditions t PWD -- 50 -- 50 ns Figure 19.11 Input data setup time t PRS 50 -- 50 -- ns Input data hold time t PRH 50 -- 50 -- ns Timer output delay time t TOCD -- 50 -- 50 ns Timer input setup time t TICS 50 -- 50 -- ns Timer clock input setup time t TCKS 50 -- 50 -- ns Timer clock pulse width Single edge t TCKWH 1.5 -- 1.5 -- t cyc Both edges t TCKWL 2.5 -- 2.5 -- t cyc Timer output delay time t TOCD -- 50 -- 50 ns Timer input setup time t TICS 50 -- 50 -- ns Timer clock input setup time t TCKS 50 -- 50 -- ns Timer clock pulse width Single edge t TCKWH 1.5 -- 1.5 -- t cyc Both edges t TCKWL 2.5 -- 2.5 -- t cyc Item Ports and Output data delay TPC time 16-bit timer 8-bit timer B and C Figure 19.12 Figure 19.13 Figure 19.12 Figure 19.13 463 Condition A Module Item SCI Input clock cycle B and C Min Max Min Max Unit Test Conditions Asynt Scyc chronous 4 -- 4 -- t cyc Figure 19.14 Synchronous 6 -- 6 -- t cyc Symbol Input clock rise time t SCKr -- 1.5 -- 1.5 t cyc Input clock fall time t SCKf -- 1.5 -- 1.5 t cyc Input clock pulse width t SCKW 0.4 0.6 0.4 0.6 t Scyc Transmit data delay time t TXD -- 100 -- 100 ns Receive data setup time (synchronous) t RXS 100 -- 100 -- ns Receive data hold time (synchronous) t RXH 100 -- 100 -- ns 0 -- 0 -- ns Clock input Clock output RL C = 90 pF: ports 4, 6, 8, A19 to A0, D15 to D8 C = 30 pF: ports 9, A, B, RESO Chip output pin R L = 2.4 k R H = 12 k C RH Input/output timing measurement levels * Low: 0.8 V * High: 2.0 V Figure 19.2 Output Load Circuit 464 Figure 19.15 19.4 A/D Conversion Characteristics Table 19.8 lists the A/D conversion characteristics. Table 19.8 A/D Conversion Characteristics Condition: Ta = -20C to +75C (regular specifications), Ta = -40C to +85C (wide-range specifications) Condition A: VCC = 3.0 to 3.6 V, AVCC = 3.0 to 3.6 V, VREF = 3.0 to AVCC, VSS = AVSS = 0 V, fmax = 25 MHz Condition B: VCC = 5.0 V 10%, AVCC = 5.0 V 10%, VREF = 4.5 to AVCC, VSS = AVSS = 0 V, fmax = 25 MHz Condition C: VCC = 5.0 V 10%, AVCC = 5.0 V 10%, VREF = 4.5 to AVCC, VSS = AVSS = 0 V, fmax = 25 MHz Condition A B and C Item Min Typ Max Min Typ Max Unit Conversion Resolution time: Conversion time (single mode) 134 states Analog input capacitance 10 10 10 10 10 10 bits 5.36 -- -- 5.36 -- -- s -- -- 20 -- -- 20 pF -- -- 10 -- -- 10 k -- -- 5 -- -- 5 k Nonlinearity error -- -- 3.5 -- -- 3.5 LSB Offset error -- -- 3.5 -- -- 3.5 LSB Full-scale error -- -- 3.5 -- -- 3.5 LSB Quantization error -- -- 0.5 -- -- 0.5 LSB Absolute accuracy -- -- 4.0 -- -- 4.0 LSB Permissible 13 MHz signal-source > 13 MHz impedance 465 Condition A B and C Item Min Typ Max Min Typ Max Unit Conversion Resolution time: Conversion time (single mode) 70 states Analog input capacitance 10 10 10 10 10 10 bits 5.36 -- -- 5.36 -- -- s -- -- 20 -- -- 20 pF -- -- 5 -- -- 5 k -- -- 3 -- -- 3 k Nonlinearity error -- -- 7.5 -- -- 7.5 LSB Offset error -- -- 7.5 -- -- 7.5 LSB Full-scale error -- -- 7.5 -- -- 7.5 LSB Quantization error -- -- 0.5 -- -- 0.5 LSB Absolute accuracy -- -- 8.0 -- -- 8.0 LSB Permissible 13 MHz signal-source > 13 MHz impedance 466 19.5 D/A Conversion Characteristics Table 19.9 lists the D/A conversion characteristics. Table 19.9 D/A Conversion Characteristics Condition: Ta = -20C to +75C (regular specifications), Ta = -40C to +85C (wide-range specifications) Condition A: VCC = 3.0 to 3.6 V, AVCC = 3.0 to 3.6 V, VREF = 3.0 to AVCC, VSS = AVSS = 0 V, fmax = 25 MHz Condition B: VCC = 5.0 V 10%, AVCC = 5.0 V 10%, VREF = 4.5 to AVCC, VSS = AVSS = 0 V, fmax = 20 MHz Condition C: VCC = 5.0 V 10%, AVCC = 5.0 V 10%, VREF = 4.5 to AVCC, VSS = AVSS = 0 V, fmax = 25 MHz Condition A B and C Item Min Typ Max Min Typ Max Unit Conditions Resolution 8 8 8 8 8 8 bits Conversion time (setting time) -- -- 10 -- -- 10 s 20 pF capacitive load Absolute accuracy -- 2.0 3.0 -- 1.5 2.0 LSB 2 M resistive load -- -- 2.0 -- -- 1.5 LSB 4 M resistive load 467 19.6 Operational Timing This section shows timing diagrams. 19.6.1 Clock Timing Clock timing is shown as follows: * Oscillator settling timing Figure 19.3 shows the oscillator settling timing. VCC STBY tOSC1 tOSC1 RES Figure 19.3 Oscillator Settling Timing 468 19.6.2 Control Signal Timing Control signal timing is shown as follows: * Reset input timing Figure 19.4 shows the reset input timing. * Reset output timing Figure 19.5 shows the reset output timing. * Interrupt input timing Figure 19.6 shows the interrupt input timing for NMI and IRQ5 to IRQ0. tRESS tRESS RES tMDS tRESW MD2 to MD0 Figure 19.4 Reset Input Timing tRESD tRESD RESO tRESOW Figure 19.5 Reset Output Timing 469 tNMIS tNMIH tNMIS tNMIH NMI IRQ E tNMIS IRQ L IRQ E : Edge-sensitive IRQ i IRQ L : Level-sensitive IRQ i (i = 0 to 5) tNMIW NMI IRQ j (j = 0 to 5) Figure 19.6 Interrupt Input Timing 470 19.6.3 Bus Timing Bus timing is shown as follows: * Basic bus cycle: two-state access Figure 19.7 shows the timing of the external two-state access cycle. * Basic bus cycle: three-state access Figure 19.8 shows the timing of the external three-state access cycle. * Basic bus cycle: three-state access with one wait state Figure 19.9 shows the timing of the external three-state access cycle with one wait state inserted. * Bus-release mode timing Figure 19.10 shows the bus-release mode timing. 471 T1 tcyc T2 tCH tCL tCf tAD tcyc tCr A23 to A0, CSn tPCH1 AS RD (read) tASD tACC3 tASD tACC3 tSD tAH tAS1 tRSD tPCH2 tAS1 tACC1 tRDH* tRDS D15 to D0 (read) tPCH1 tASD HWR, LWR (write) tSD tAH tAS1 tWDD tWSW1 tWDS1 tWDH D15 to D0 (write) Note: * Specification from the earliest negation timing of A23 to A0, CSn, and RD. Figure 19.7 Basic Bus Cycle: Two-State Access 472 T1 T2 T3 A23 to A0, CSn tACC4 AS tACC4 RD (read) tACC2 tRDS D15 to D0 (read) tWSD HWR, LWR (write) tWSW2 tAS2 tWDD tWDS2 D15 to D0 (write) Figure 19.8 Basic Bus Cycle: Three-State Access 473 T1 T2 TW T3 A23 to A0, CSn AS RD (read) D15 to D0 (read) HWR, LWR (write) D15 to D0 (write) tWTS tWTH tWTS tWTH WAIT Figure 19.9 Basic Bus Cycle: Three-State Access with One Wait State tBRQS tBRQS BREQ tBACD2 tBACD1 BACK A23 to A0, AS, RD, HWR, LWR tBZD Figure 19.10 Bus-Release Mode Timing 474 tBZD 19.6.4 TPC and I/O Port Timing Figure 19.11 shows the TPC and I/O port input/output timing. T1 T2 T3 tPRS tPRH Port 4 to B (read) tPWD Port 4, 6, 8 to B (write) Figure 19.11 TPC and I/O Port Input/Output Timing 19.6.5 Timer Input/Output Timing 16-bit timer and 8-bit timer timing is shown below. * Timer input/output timing Figure 19.12 shows the timer input/output timing. * Timer external clock input timing Figure 19.13 shows the timer external clock input timing. tTOCD Output compare* 1 tTICS Input capture* 2 Notes: *1 TIOCA0 to TIOCA2, TIOCB0 to TIOCB2, TMO0, TMO2, TMIO1, TMIO3 *2 TIOCA0 to TIOCA2, TIOCB0 to TIOCB2, TMIO1, TMIO3 Figure 19.12 Timer Input/Output Timing 475 tTCKS tTCKS TCLKA to TCLKD tTCKWL tTCKWH Figure 19.13 Timer External Clock Input Timing 19.6.6 SCI Input/Output Timing SCI timing is shown as follows: * SCI input clock timing Figure 19.14 shows the SCI input clock timing. * SCI input/output timing (synchronous mode) Figure 19.15 shows the SCI input/output timing in synchronous mode. tSCKW tSCKr tSCKf SCK0, SCK1 tScyc Figure 19.14 SCI Input Clock Timing tScyc SCK0, SCK1 tTXD TxD0, TxD1 (transmit data) tRXS tRXH RxD0, RxD1 (receive data) Figure 19.15 SCI Input/Output Timing in Synchronous Mode 476 Appendix A Instruction Set A.1 Instruction List Operand Notation Symbol Description Rd General destination register Rs General source register Rn General register ERd General destination register (address register or 32-bit register) ERs General source register (address register or 32-bit register) ERn General register (32-bit register) (EAd) Destination operand (EAs) Source operand PC Program counter SP Stack pointer CCR Condition code register N N (negative) flag in CCR Z Z (zero) flag in CCR V V (overflow) flag in CCR C C (carry) flag in CCR disp Displacement Transfer from the operand on the left to the operand on the right, or transition from the state on the left to the state on the right + Addition of the operands on both sides - Subtraction of the operand on the right from the operand on the left x Multiplication of the operands on both sides / Division of the operand on the left by the operand on the right Logical AND of the operands on both sides Logical OR of the operands on both sides Exclusive logical OR of the operands on both sides NOT (logical complement) ( ), < > Contents of operand Note: General registers include 8-bit registers (R0H to R7H and R0L to R7L) and 16-bit registers (R0 to R7 and E0 to E7). 477 Condition Code Notation Symbol Description Changed according to execution result * Undetermined (no guaranteed value) 0 Cleared to 0 1 Set to 1 -- Not affected by execution of the instruction Varies depending on conditions, described in notes 478 Table A.1 Instruction Set 1. Data transfer instructions I H N Z 0 -- 0 -- 0 -- 0 -- 0 -- 0 -- @ERs Rd16 -- -- MOV.W @(d:16, ERs), W Rd 4 @(d:16, ERs) Rd16 -- -- 0 -- MOV.W @(d:24, ERs), W Rd 8 @(d:24, ERs) Rd16 -- -- 0 -- @ERs Rd16 ERs32+2 @ERd32 -- -- -- -- 0 -- @aa:16 Rd16 -- -- -- -- Rs8 Rd8 C #xx:8 Rd8 V 0 -- 2 @ERs Rd8 -- -- MOV.B @(d:16, ERs), B Rd 4 @(d:16, ERs) Rd8 -- -- MOV.B @(d:24, ERs), B Rd 8 @(d:24, ERs) Rd8 -- -- @ERs Rd8 ERs32+1 ERs32 -- -- 2 MOV.B @ERs+, Rd B MOV.B @aa:8, Rd B 2 @aa:8 Rd8 -- -- MOV.B @aa:16, Rd B 4 @aa:16 Rd8 -- -- MOV.B @aa:24, Rd B 6 @aa:24 Rd8 -- -- MOV.B Rs, @ERd B Rs8 @ERd -- -- MOV.B Rs, @(d:16, ERd) B 4 Rs8 @(d:16, ERd) -- -- MOV.B Rs, @(d:24, ERd) B 8 Rs8 @(d:24, ERd) -- -- MOV.B Rs, @-ERd B ERd32-1 ERd32 Rs8 @ERd -- -- MOV.B Rs, @aa:8 B 2 Rs8 @aa:8 -- -- MOV.B Rs, @aa:16 B 4 Rs8 @aa:16 -- -- MOV.B Rs, @aa:24 B 6 Rs8 @aa:24 -- -- MOV.W #xx:16, Rd W 4 #xx:16 Rd16 -- -- MOV.W Rs, Rd W Rs16 Rd16 -- -- MOV.W @ERs, Rd W MOV.W @ERs+, Rd W MOV.W @aa:16, Rd W 2 2 2 2 2 2 4 Normal Condition Code Operation Advanced No. of States*1 -- @@aa @(d, PC) B @aa MOV.B @ERs, Rd @-ERn/@ERn+ 2 B @(d, ERn) B MOV.B Rs, Rd @ERn #xx MOV.B #xx:8, Rd Rn Mnemonic Operand Size Addressing Mode and Instruction Length (bytes) 2 0 -- 2 0 -- 4 0 -- 6 10 6 4 0 -- 6 0 -- 8 0 -- 4 0 -- 6 10 6 4 0 -- 6 0 -- 8 0 -- 4 0 -- 2 0 -- 4 0 -- 6 10 6 6 479 W 8 MOV.W Rs, @-ERd W MOV.W Rs, @aa:16 W MOV.W Rs, @aa:24 W MOV.L #xx:32, Rd L MOV.L ERs, ERd L MOV.L @ERs, ERd L MOV.L @(d:16, ERs), ERd L 6 MOV.L @(d:24, ERs), ERd L 10 MOV.L @ERs+, ERd L MOV.L @aa:16, ERd L MOV.L @aa:24, ERd L MOV.L ERs, @ERd L MOV.L ERs, @(d:16, ERd) L 6 MOV.L ERs, @(d:24, ERd) L 10 MOV.L ERs, @-ERd L MOV.L ERs, @aa:16 L 6 MOV.L ERs, @aa:24 L 8 POP.W Rn W 2 @SP Rn16 SP+2 SP POP.L ERn L @SP ERn32 4 SP+4 SP 480 @aa:16 ERd32 -- -- 8 @aa:24 ERd32 -- -- ERs32 @ERd -- -- ERs32 @(d:16, ERd) -- -- ERs32 @(d:24, ERd) -- -- ERd32-4 ERd32 ERs32 @ERd -- -- ERs32 @aa:16 -- -- ERs32 @aa:24 -- -- -- -- -- -- 4 4 6 -- -- @ERs ERd32 ERs32+4 ERs32 4 @(d:24, ERs) ERd32 -- -- @(d:16, ERs) ERd32 -- -- -- -- -- -- @ERs ERd32 4 ERs32 ERd32 2 -- -- -- -- #xx:32 Rd32 0 -- Rs16 @aa:24 6 6 0 -- 0 -- -- -- Rs16 @aa:16 0 -- 0 -- 8 0 -- 10 4 0 -- -- -- 0 -- 0 -- 14 ERd32-2 ERd32 Rs16 @ERd -- -- Rs16 @(d:16, ERd) C 0 -- -- -- Rs16 @ERd V 0 -- 10 Rs16 @(d:24, ERd) 2 I -- -- -- -- 2 Operation @aa:24 Rd16 0 -- 10 0 -- 12 0 -- 6 Z -- H N 6 Normal MOV.W Rs, @(d:24, ERd) @@aa 4 @(d, PC) W @aa W MOV.W Rs, @(d:16, ERd) @(d, ERn) MOV.W Rs, @ERd @ERn W Rn MOV.W @aa:24, Rd #xx Mnemonic Condition Code Advanced No. of States*1 Operand Size @-ERn/@ERn+ Addressing Mode and Instruction Length (bytes) 0 -- 10 8 0 -- 4 0 -- 6 10 6 6 0 -- 8 0 -- 6 0 -- 2 0 -- 8 0 -- 10 14 10 10 0 -- 12 B 4 Cannot be used in the H8/3008 Cannot be used in the H8/3008 MOVTPE Rs, @aa:16 B 4 Cannot be used in the H8/3008 Cannot be used in the H8/3008 Z -- -- V C H N -- -- 0 -- 6 I -- Condition Code Operation Normal MOVFPE @aa:16, Rd @@aa 4 SP-4 SP ERn32 @SP @(d, PC) L @aa PUSH.L ERn @(d, ERn) 2 SP-2 SP Rn16 @SP @ERn W Rn PUSH.W Rn #xx Mnemonic Advanced No. of States*1 Operand Size @-ERn/@ERn+ Addressing Mode and Instruction Length (bytes) 0 -- 10 2. Arithmetic instructions Advanced Normal -- (3) 2 2 Rd8+Rs8 +C Rd8 -- 2 ERd32+1 ERd32 -- -- -- -- -- -- 2 L 2 ERd32+2 ERd32 -- -- -- -- -- -- 2 ADDS.L #4, ERd L 2 ERd32+4 ERd32 -- -- -- -- -- -- 2 INC.B Rd B 2 Rd8+1 Rd8 -- -- 6 2 2 -- Rd16+#xx:16 Rd16 -- (1) Rd16+Rs16 Rd16 -- (1) ERd32+#xx:32 ERd32 Rd8+Rs8 Rd8 INC.W #1, Rd W 2 Rd16+1 Rd16 -- -- INC.W #2, Rd W 2 Rd16+2 Rd16 -- -- (3) 2 I -- Rd8+#xx:8 +C Rd8 2 Operation Rd8+#xx:8 Rd8 ADDS.L #2, ERd 2 L B ADDS.L #1, ERd -- (2) ADDX.B Rs, Rd ERd32+ERs32 ERd32 B 2 -- (2) ADDX.B #xx:8, Rd C L V ADD.L ERs, ERd Z L H N ADD.L #xx:32, ERd Condition Code W No. of States*1 -- W 4 ADD.W Rs, Rd @@aa ADD.W #xx:16, Rd @(d, PC) B @aa ADD.B Rs, Rd @-ERn/@ERn+ 2 @(d, ERn) B @ERn #xx ADD.B #xx:8, Rd Rn Mnemonic Operand Size Addressing Mode and Instruction Length (bytes) 2 4 2 6 2 -- 2 -- 2 -- 2 481 2 ERd32+2 ERd32 B 2 Rd8 decimal adjust Rd8 SUB.B Rs, Rd B 2 Rd8-Rs8 Rd8 -- SUB.W #xx:16, Rd W 4 Rd16-#xx:16 Rd16 -- (1) SUB.W Rs, Rd W Rd16-Rs16 Rd16 -- (1) SUB.L #xx:32, ERd L ERd32-#xx:32 ERd32 SUB.L ERs, ERd L SUBX.B #xx:8, Rd B SUBX.B Rs, Rd B 2 SUBS.L #1, ERd L SUBS.L #2, ERd L SUBS.L #4, ERd DEC.B Rd DEC.W #1, Rd DEC.W #2, Rd Z V C 2 -- -- -- -- 2 -- * * -- 2 -- (2) 2 ERd32-ERs32 ERd32 -- (2) 2 Rd8-#xx:8-C Rd8 -- 2 -- (3) Rd8-Rs8-C Rd8 2 ERd32-1 ERd32 -- -- -- -- -- -- 2 2 ERd32-2 ERd32 -- -- -- -- -- -- 2 L 2 ERd32-4 ERd32 -- -- -- -- -- -- 2 B 2 Rd8-1 Rd8 -- -- W 2 Rd16-1 Rd16 -- -- W 2 Rd16-2 Rd16 -- -- DEC.L #1, ERd L 2 ERd32-1 ERd32 -- -- DEC.L #2, ERd L 2 ERd32-2 ERd32 -- -- DAS.Rd B 2 Rd8 decimal adjust Rd8 -- * -- H N MULXU. B Rs, Rd B MULXU. W Rs, ERd 2 6 2 2 6 2 -- 2 -- 2 (3) 4 -- 2 -- 2 -- 2 * -- 2 2 Rd8 x Rs8 Rd16 -- -- -- -- -- -- (unsigned multiplication) 14 W 2 Rd16 x Rs16 ERd32 -- (unsigned multiplication) 22 MULXS. B Rs, Rd B 4 Rd8 x Rs8 Rd16 (signed multiplication) -- -- I MULXS. W Rs, ERd W 4 Rd16 x Rs16 ERd32 (signed multiplication) -- -- 2 Operation Normal L DAA Rd @@aa INC.L #2, ERd @(d, PC) -- -- @aa ERd32+1 ERd32 @(d, ERn) 2 @ERn L Rn INC.L #1, ERd #xx Mnemonic Condition Code Advanced No. of States*1 Operand Size @-ERn/@ERn+ Addressing Mode and Instruction Length (bytes) DIVXU. B Rs, Rd B 2 Rd16 / Rs8 Rd16 (RdH: remainder, RdL: quotient) (unsigned division) 482 -- -- 16 -- -- -- -- -- -- -- 24 -- -- (6) (7) -- -- 14 No. of States*1 4 Rd16 / Rs8 Rd16 (RdH: remainder, RdL: quotient) (signed division) -- -- (8) (7) -- -- 16 DIVXS. W Rs, ERd W 4 ERd32 / Rs16 ERd32 -- -- (8) (7) -- -- (Ed: remainder, Rd: quotient) (signed division) 24 CMP.B #xx:8, Rd B -- NEG.W Rd W 2 0-Rd16 Rd16 -- NEG.L ERd L 2 0-ERd32 ERd32 -- EXTU.W Rd W 2 0 (<bits 15 to 8> of Rd16) -- -- 0 EXTU.L ERd L 2 0 (<bits 31 to 16> of ERd32) -- -- 0 EXTS.W Rd W 2 (<bit 7> of Rd16) -- -- (<bits 15 to 8> of Rd16) EXTS.L ERd L 2 (<bit 15> of ERd32) (<bits 31 to 16> of ERd32) L 2 6 -- Rd16-#xx:16 -- (1) Rd16-Rs16 -- (1) ERd32-#xx:32 -- (2) W CMP.L #xx:32, ERd Rd8-Rs8 -- -- Normal -- (2) 0-Rd8 Rd8 CMP.W Rs, Rd 2 ERd32-ERs32 2 W 4 2 0 -- 2 2 B B CMP.W #xx:16, Rd -- C 0 -- 2 L NEG.B Rd CMP.B Rs, Rd Rd8-#xx:8 V 0 -- 2 Z CMP.L ERs, ERd 2 H N I Operation -- Condition Code Advanced B @@aa DIVXS. B Rs, Rd @(d, PC) 22 @aa ERd32 / Rs16 ERd32 -- -- (6) (7) -- -- (Ed: remainder, Rd: quotient) (unsigned division) @(d, ERn) 2 @ERn W Rn DIVXU. W Rs, ERd #xx Mnemonic Operand Size @-ERn/@ERn+ Addressing Mode and Instruction Length (bytes) 0 -- 2 2 4 2 6 2 2 2 2 483 3. Logic instructions W 4 AND.W Rs, Rd W AND.L #xx:32, ERd L AND.L ERs, ERd L OR.B #xx:8, Rd B 2 2 4 2 B OR.W #xx:16, Rd W 4 OR.W Rs, Rd W OR.L #xx:32, ERd L OR.L ERs, ERd L XOR.B #xx:8, Rd B 2 2 4 2 B XOR.W #xx:16, Rd W 4 XOR.W Rs, Rd W XOR.L #xx:32, ERd L Z Rd8Rs8 Rd8 -- -- Rd16#xx:16 Rd16 -- -- Rd16Rs16 Rd16 -- -- ERd32ERs32 ERd32 -- -- Rd8#xx:8 Rd8 -- -- Rd8Rs8 Rd8 -- -- Rd16#xx:16 Rd16 -- -- Rd16Rs16 Rd16 -- -- 2 2 ERd32ERs32 ERd32 -- -- Rd8#xx:8 Rd8 -- -- Rd8Rs8 Rd8 -- -- Rd16#xx:16 Rd16 -- -- Rd16Rs16 Rd16 -- -- ERd32#xx:32 ERd32 -- -- 6 XOR.L ERs, ERd L 4 ERd32ERs32 ERd32 -- -- NOT.B Rd B 2 Rd8 Rd8 -- -- NOT.W Rd W 2 Rd16 Rd16 -- -- NOT.L ERd L 2 Rd32 Rd32 -- -- 484 V C Advanced H N Normal -- @@aa @(d, PC) @aa I -- -- ERd32#xx:32 ERd32 -- -- 6 XOR.B Rs, Rd Operation Rd8#xx:8 Rd8 ERd32#xx:32 ERd32 -- -- 6 OR.B Rs, Rd Condition Code B AND.W #xx:16, Rd No. of States*1 AND.B Rs, Rd @-ERn/@ERn+ 2 @(d, ERn) B @ERn #xx AND.B #xx:8, Rd Rn Mnemonic Operand Size Addressing Mode and Instruction Length (bytes) 0 -- 2 0 -- 2 0 -- 4 0 -- 2 0 -- 6 0 -- 4 0 -- 2 0 -- 2 0 -- 4 0 -- 2 0 -- 6 0 -- 4 0 -- 2 0 -- 2 0 -- 4 0 -- 2 0 -- 6 0 -- 4 0 -- 2 0 -- 2 0 -- 2 4. Shift instructions 2 L 2 SHAR.B Rd B 2 SHAR.W Rd W 2 SHAR.L ERd L 2 SHLL.B Rd B 2 SHLL.W Rd W 2 SHLL.L ERd L 2 SHLR.B Rd B 2 SHLR.W Rd W 2 SHLR.L ERd L 2 ROTXL.B Rd B 2 ROTXL.W Rd W 2 ROTXL.L ERd L 2 ROTXR.B Rd B 2 ROTXR.W Rd W 2 ROTXR.L ERd L 2 ROTL.B Rd B 2 ROTL.W Rd W 2 ROTL.L ERd L 2 ROTR.B Rd B 2 ROTR.W Rd W 2 2 C 0 MSB LSB -- -- -- -- -- -- C MSB LSB -- -- -- -- -- -- C 0 MSB LSB -- -- -- -- -- -- 0 C MSB LSB -- -- -- -- -- -- C -- -- MSB LSB -- -- -- -- C MSB LSB -- -- -- -- -- -- C -- -- MSB LSB -- -- -- -- C MSB LSB -- -- -- -- V C 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Advanced Z Normal H N I -- -- Operation -- @@aa @(d, PC) @aa @-ERn/@ERn+ @(d, ERn) Condition Code W SHAL.L ERd L No. of States*1 2 SHAL.W Rd ROTR.L ERd @ERn B Rn SHAL.B Rd #xx Mnemonic Operand Size Addressing Mode and Instruction Length (bytes) 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 485 5. Bit manipulation instructions B BCLR #xx:3, @aa:8 B BCLR Rn, Rd B BCLR Rn, @ERd B BCLR Rn, @aa:8 B BNOT #xx:3, Rd B BNOT #xx:3, @ERd B BNOT #xx:3, @aa:8 B BNOT Rn, Rd B BNOT Rn, @ERd B BNOT Rn, @aa:8 B BTST #xx:3, Rd B BTST #xx:3, @ERd B BTST #xx:3, @aa:8 B BTST Rn, Rd B BTST Rn, @ERd B BTST Rn, @aa:8 B BLD #xx:3, Rd B 486 4 4 2 4 4 2 4 4 2 4 4 2 4 4 2 4 4 2 H N Z V C Advanced BCLR #xx:3, @ERd 4 2 I Normal B 4 Operation (#xx:3 of Rd8) 1 -- -- -- -- -- -- 2 (#xx:3 of @ERd) 1 -- -- -- -- -- -- 8 (#xx:3 of @aa:8) 1 -- -- -- -- -- -- 8 (Rn8 of Rd8) 1 -- -- -- -- -- -- 2 (Rn8 of @ERd) 1 -- -- -- -- -- -- 8 (Rn8 of @aa:8) 1 -- -- -- -- -- -- 8 (#xx:3 of Rd8) 0 -- -- -- -- -- -- 2 (#xx:3 of @ERd) 0 -- -- -- -- -- -- 8 (#xx:3 of @aa:8) 0 -- -- -- -- -- -- 8 (Rn8 of Rd8) 0 -- -- -- -- -- -- 2 (Rn8 of @ERd) 0 -- -- -- -- -- -- 8 (Rn8 of @aa:8) 0 -- -- -- -- -- -- 8 (#xx:3 of Rd8) (#xx:3 of Rd8) -- -- -- -- -- -- 2 (#xx:3 of @ERd) (#xx:3 of @ERd) -- -- -- -- -- -- 8 (#xx:3 of @aa:8) (#xx:3 of @aa:8) -- -- -- -- -- -- 8 (Rn8 of Rd8) (Rn8 of Rd8) -- -- -- -- -- -- 2 (Rn8 of @ERd) (Rn8 of @ERd) -- -- -- -- -- -- 8 (Rn8 of @aa:8) (Rn8 of @aa:8) -- -- -- -- -- -- 8 (#xx:3 of Rd8) Z -- -- -- (#xx:3 of @ERd) Z -- -- -- (#xx:3 of @aa:8) Z -- -- -- (Rn8 of @Rd8) Z -- -- -- (Rn8 of @ERd) Z -- -- -- (Rn8 of @aa:8) Z -- -- -- (#xx:3 of Rd8) C -- -- -- -- -- -- -- 2 -- -- 6 -- -- 6 -- -- 2 -- -- 6 -- -- 6 B BCLR #xx:3, Rd 2 Condition Code BSET Rn, @aa:8 4 No. of States*1 -- B 4 @@aa B BSET Rn, @ERd 2 @(d, PC) BSET Rn, Rd @aa B @-ERn/@ERn+ B BSET #xx:3, @aa:8 @(d, ERn) BSET #xx:3, @ERd @ERn B Rn BSET #xx:3, Rd #xx Mnemonic Operand Size Addressing Mode and Instruction Length (bytes) 2 B BIST #xx:3, Rd B BIST #xx:3, @ERd B BIST #xx:3, @aa:8 B BAND #xx:3, Rd B BAND #xx:3, @ERd B BAND #xx:3, @aa:8 B BIAND #xx:3, Rd B 4 4 2 4 4 2 4 4 2 BIAND #xx:3, @ERd B BOR #xx:3, Rd B BOR #xx:3, @ERd B BOR #xx:3, @aa:8 B BIOR #xx:3, Rd B BIOR #xx:3, @ERd B BIOR #xx:3, @aa:8 B BXOR #xx:3, Rd B BXOR #xx:3, @ERd B BXOR #xx:3, @aa:8 B BIXOR #xx:3, Rd B BIXOR #xx:3, @ERd B BIXOR #xx:3, @aa:8 B C -- -- -- -- -- H N Z 6 (#xx:3 of @aa:8) C -- -- -- -- -- (#xx:3 of Rd8) C -- -- -- -- -- (#xx:3 of @ERd) C -- -- -- -- -- (#xx:3 of @aa:8) C -- -- -- -- -- C (#xx:3 of Rd8) -- -- -- -- -- -- 2 C (#xx:3 of @ERd24) -- -- -- -- -- -- 8 4 2 4 4 2 4 2 4 4 2 4 6 6 -- -- -- -- -- -- 8 -- -- -- -- -- -- 2 C (#xx:3 of @ERd24) -- -- -- -- -- -- 8 C (#xx:3 of @aa:8) -- -- -- -- -- -- 8 C(#xx:3 of Rd8) C -- -- -- -- -- 2 C(#xx:3 of @ERd24) C -- -- -- -- -- C(#xx:3 of @aa:8) C -- -- -- -- -- C (#xx:3 of Rd8) C -- -- -- -- -- C (#xx:3 of @aa:8) C -- -- -- -- -- C(#xx:3 of Rd8) C -- -- -- -- -- C(#xx:3 of @ERd24) C -- -- -- -- -- C(#xx:3 of @aa:8) C -- -- -- -- -- C (#xx:3 of Rd8) C -- -- -- -- -- C (#xx:3 of @aa:8) C -- -- -- -- -- C(#xx:3 of Rd8) C -- -- -- -- -- C(#xx:3 of @ERd24) C -- -- -- -- -- C(#xx:3 of @aa:8) C -- -- -- -- -- C (#xx:3 of Rd8) C -- -- -- -- -- C (#xx:3 of @ERd24) C -- -- -- -- -- 4 2 C (#xx:3 of @aa:8) C (#xx:3 of @ERd24) C -- -- -- -- -- 4 6 C (#xx:3 of Rd8) C (#xx:3 of @ERd24) C -- -- -- -- -- 4 BIAND #xx:3, @aa:8 B I Advanced BST #xx:3, @aa:8 2 Operation Normal B V (#xx:3 of @ERd) C B BST #xx:3, @ERd 4 Condition Code BST #xx:3, Rd 4 No. of States*1 -- B 4 2 @@aa B BILD #xx:3, @aa:8 4 @(d, PC) BILD #xx:3, @ERd @aa B @-ERn/@ERn+ B BILD #xx:3, Rd @(d, ERn) BLD #xx:3, @aa:8 @ERn B Rn BLD #xx:3, @ERd #xx Mnemonic Operand Size Addressing Mode and Instruction Length (bytes) C (#xx:3 of @aa:8) C -- -- -- -- -- 6 6 2 6 6 2 6 6 2 6 6 2 6 6 2 6 6 487 6. Branching instructions 4 -- 2 BHI d:16 -- 4 BLS d:8 -- 2 BLS d:16 -- 4 BCC d:8 (BHS d:8) -- 2 BCC d:16 (BHS d:16) -- 4 BCS d:8 (BLO d:8) -- 2 BCS d:16 (BLO d:16) -- 4 BNE d:8 -- 2 BNE d:16 -- 4 BEQ d:8 -- 2 BEQ d:16 -- 4 BVC d:8 -- 2 BVC d:16 -- 4 BVS d:8 -- 2 BVS d:16 -- 4 BPL d:8 -- 2 BPL d:16 -- 4 BMI d:8 -- 2 BMI d:16 -- 4 BGE d:8 -- 2 BGE d:16 -- 4 BLT d:8 -- 2 BLT d:16 -- 4 BGT d:8 -- 2 BGT d:16 -- 4 488 If condition Always is true then PC PC+d else Never next; CZ=0 CZ=1 C=0 C=1 Z=0 Z=1 V=0 V=1 N=0 N=1 NV = 0 NV = 1 Z (NV) =0 Condition Code I H N Z V C Advanced -- BHI d:8 Branch Operation Condition Normal BRN d:16 (BF d:16) No. of States*1 -- 2 @@aa 4 -- @(d, PC) -- BRN d:8 (BF d:8) @aa BRA d:16 (BT d:16) @(d, ERn) 2 @ERn -- Rn BRA d:8 (BT d:8) #xx Mnemonic Operand Size @-ERn/@ERn+ Addressing Mode and Instruction Length (bytes) -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 -- -- -- -- -- -- 4 -- -- -- -- -- -- 6 JMP @@aa:8 -- BSR d:8 -- 2 BSR d:16 -- 4 JSR @ERn -- -- 2 4 2 2 4 JSR @aa:24 -- JSR @@aa:8 -- 2 Condition Code I H N Z V C Advanced -- Branch Operation Condition Normal -- JMP @aa:24 No. of States*1 -- JMP @ERn @@aa 4 @(d, PC) -- @aa BLE d:16 @(d, ERn) 2 @ERn -- Rn BLE d:8 #xx Mnemonic Operand Size @-ERn/@ERn+ Addressing Mode and Instruction Length (bytes) If condition Z (NV) = 1 -- -- -- -- -- -- is true then -- -- -- -- -- -- PC PC+d else next; 4 PC ERn -- -- -- -- -- -- 4 PC aa:24 -- -- -- -- -- -- 6 PC @aa:8 -- -- -- -- -- -- 8 10 PC @-SP PC PC+d:8 -- -- -- -- -- -- 6 8 PC @-SP PC PC+d:16 -- -- -- -- -- -- 8 10 PC @-SP PC @ERn -- -- -- -- -- -- 6 8 PC @-SP PC @aa:24 -- -- -- -- -- -- 8 10 PC @-SP PC @aa:8 -- -- -- -- -- -- 8 12 2 PC @SP+ -- -- -- -- -- -- 8 10 6 489 7. System control instructions SLEEP -- Transition to powerdown -- -- -- -- -- -- state 2 LDC #xx:8, CCR B #xx:8 CCR B LDC @ERs, CCR W LDC @(d:16, ERs), CCR W 6 @(d:16, ERs) CCR 2 LDC Rs, CCR LDC @(d:24, ERs), CCR W 10 @(d:24, ERs) CCR 12 LDC @ERs+, CCR W @ERs CCR ERs32+2 ERs32 8 LDC @aa:16, CCR W 6 @aa:16 CCR LDC @aa:24, CCR W 8 @aa:24 CCR 8 10 STC CCR, Rd B CCR Rd8 -- -- -- -- -- -- 2 STC CCR, @ERd W CCR @ERd -- -- -- -- -- -- 6 STC CCR, @(d:16, ERd) W 6 CCR @(d:16, ERd) -- -- -- -- -- -- 8 STC CCR, @(d:24, ERd) W 10 CCR @(d:24, ERd) -- -- -- -- -- -- 12 STC CCR, @-ERd W ERd32-2 ERd32 CCR @ERd -- -- -- -- -- -- 8 STC CCR, @aa:16 W 6 CCR @aa:16 -- -- -- -- -- -- 8 STC CCR, @aa:24 W 8 CCR @aa:24 -- -- -- -- -- -- 10 ANDC #xx:8, CCR B 2 CCR#xx:8 CCR ORC #xx:8, CCR B 2 CCR#xx:8 CCR XORC #xx:8, CCR B 2 CCR#xx:8 CCR 2 NOP -- -- -- -- -- -- -- 2 490 2 4 4 2 PC PC+2 C Normal V 4 Z @ERs CCR 4 H N Rs8 CCR 2 I 1 -- -- -- -- -- 14 16 -- Operation 2 Condition Code Advanced 10 @@aa CCR @SP+ PC @SP+ @(d, PC) -- @aa RTE @(d, ERn) 2 PC @-SP CCR @-SP <vector> PC @ERn -- Rn TRAPA #x:2 #xx Mnemonic No. of States*1 Operand Size @-ERn/@ERn+ Addressing Mode and Instruction Length (bytes) 2 6 8 2 2 8. Block transfer instructions Operation I H N Z V C 4 if R4L 0 -- -- -- -- -- -- repeat @R5 @R6 R5+1 R5 R6+1 R6 R4L-1 R4L until R4L=0 else next; 4 if R4 0 repeat @R5 @R6 R5+1 R5 R6+1 R6 R4-1 R4 until R4L=0 else next; -- -- -- -- -- -- Advanced Condition Code Normal No. of States*1 -- @@aa @(d, PC) @aa @-ERn/@ERn+ -- @(d, ERn) EEPMOV. W @ERn -- Rn EEPMOV. B #xx Mnemonic Operand Size Addressing Mode and Instruction Length (bytes) 8+4n*2 8+4n*2 Notes: *1 The number of states is the number of states required for execution when the instruction and its operands are located in on-chip memory. For other cases see section A.3, Number of States Required for Execution. *2 n is the value set in register R4L or R4. (1) Set to 1 when a carry or borrow occurs at bit 11; otherwise cleared to 0. (2) Set to 1 when a carry or borrow occurs at bit 27; otherwise cleared to 0. (3) Retains its previous value when the result is zero; otherwise cleared to 0. (4) Set to 1 when the adjustment produces a carry; otherwise retains its previous value. (5) The number of states required for execution of an instruction that transfers data in synchronization with the E clock is variable. (6) Set to 1 when the divisor is negative; otherwise cleared to 0. (7) Set to 1 when the divisor is zero; otherwise cleared to 0. (8) Set to 1 when the quotient is negative; otherwise cleared to 0. 491 492 STC Table A.2 (2) NOP MULXU 5 SUBX OR XOR AND MOV C D E F BILD BIST BLD BST TRAPA BNQ B BIAND BAND AND RTE BNE CMP BIXOR BXOR XOR BSR BCS A BIOR BOR OR RTS BCC MOV.B Table A.2 (2) LDC 7 ADDX BTST DIVXU BLS AND.B ANDC 6 9 BCLR MULXU BHI XOR.B XORC 5 ADD BNOT DIVXU BRN OR.B ORC 4 MOV BVS 9 B JMP BPL BMI MOV Table A.2 Table A.2 (2) (2) Table A.2 Table A.2 (2) (2) A Table A.2 Table A.2 EEPMOV (2) (2) SUB ADD Table A.2 (2) BVC 8 BSR BGE C CMP MOV Instruction when most significant bit of BH is 1. Instruction when most significant bit of BH is 0. 8 7 BSET BRA 6 LDC 3 Table A.2 Table A.2 Table A.2 Table A.2 (2) (2) (2) (2) 2 1 0 4 3 2 1 0 AL 1st byte 2nd byte AH AL BH BL E JSR BGT SUBX ADDX Table A.2 (3) BLT D BLE Table A.2 (2) Table A.2 (2) F Table A.2 AH Instruction code: A.2 Operation Code Maps Operation Code Map (1) SUBS DAS BRA MOV MOV 1B 1F 58 79 7A CMP CMP ADD ADD 2 BHI 1 SUB SUB BLS OR OR XOR XOR BCS AND AND BEQ BVC SUBS 9 BVS NEG NOT DEC ROTR ROTXR DEC ROTL ADDS SLEEP 8 ROTXL EXTU INC 7 SHAR BNE 6 SHLR EXTU INC 5 SHAL BCC LDC/STC 4 SHLL 3 1st byte 2nd byte AH AL BH BL BRN NOT 17 DEC ROTXR 13 1A ROTXL 12 DAA 0F SHLR ADDS 0B 11 INC 0A SHLL MOV 01 10 0 BH AH AL Instruction code: BPL A MOV BMI NEG CMP SUB ROTR ROTL SHAR C D BGE BLT DEC EXTS INC Table A.2 Table A.2 (3) (3) ADD SHAL B BGT E F BLE DEC EXTS INC Table A.2 (3) Table A.2 Operation Code Map (2) 493 494 CL DIVXS 3 BSET BSET 7Faa7 * 2 BNOT BNOT BCLR BCLR Notes: *1 r is the register designation field. *2 aa is the absolute address field. 7Faa6 *2 BTST BCLR 7Eaa7 * 2 BNOT BTST BSET 7Dr07 * 1 7Eaa6 * 2 BSET 7Dr06 * 1 BTST BCLR MULXS 2 7Cr07 * 1 BNOT DIVIXS 1 BTST MULXS 0 BIOR BOR BIOR BOR OR 4 BIXOR BXOR BIXOR BXOR XOR 5 BIAND BAND BIAND BAND AND 6 7 BIST BILD BST BLD BIST BILD BST BLD 1st byte 2nd byte 3rd byte 4th byte AH AL BH BL CH CL DH DL 7Cr06 * 1 01F06 01D05 01C05 01406 AH ALBH BLCH Instruction code: 8 LDC STC 9 A LDC STC B C LDC STC D E LDC STC F Instruction when most significant bit of DH is 1. Instruction when most significant bit of DH is 0. Table A.2 Operation Code Map (3) A.3 Number of States Required for Execution The tables in this section can be used to calculate the number of states required for instruction execution by the H8/300H CPU. Table A.4 indicates the number of instruction fetch, data read/write, and other cycles occurring in each instruction. Table A.3 indicates the number of states required per cycle according to the bus size. The number of states required for execution of an instruction can be calculated from these two tables as follows: Number of states = I x SI + J x SJ + K x SK + L x SL+ M x SM + N x SN Examples of Calculation of Number of States Required for Execution Examples: Advanced mode, stack located in external address space, on-chip supporting modules accessed with 8-bit bus width, external devices accessed in three states with one wait state and 16-bit bus width. BSET #0, @FFFFC7:8 From table A.4, I = L = 2 and J = K = M = N = 0 From table A.3, SI = 4 and S L = 3 Number of states = 2 x 4 + 2 x 3 = 14 JSR @@30 From table A.4, I = J = K = 2 and L = M = N = 0 From table A.3, SI = SJ = SK = 4 Number of states = 2 x 4 + 2 x 4 + 2 x 4 = 24 495 Table A.3 Number of States per Cycle Access Conditions External Device On-Chip Supporting Module On-Chip 8-Bit Memory Bus Cycle Instruction fetch SI 2 6 8-Bit Bus 16-Bit Bus 2-State Access 3-State Access 2-State Access 3-State Access 3 4 6 + 2m 2 3+m Branch address read SJ Stack operation SK Byte data access SL 3 2 3+m Word data access SM 6 4 6 + 2m Internal operation SN 1 Legend m: Number of wait states inserted into external device access 496 16-Bit Bus Table A.4 Number of Cycles per Instruction Instruction Mnemonic Instruction Branch Stack Byte Data Word Data Internal Fetch Addr. Read Operation Access Access Operation I J K L M N ADD ADD.B #xx:8, Rd ADD.B Rs, Rd ADD.W #xx:16, Rd ADD.W Rs, Rd ADD.L #xx:32, ERd ADD.L ERs, ERd 1 1 2 1 3 1 ADDS ADDS #1/2/4, ERd 1 ADDX ADDX #xx:8, Rd ADDX Rs, Rd 1 1 AND AND.B #xx:8, Rd AND.B Rs, Rd AND.W #xx:16, Rd AND.W Rs, Rd AND.L #xx:32, ERd AND.L ERs, ERd 1 1 2 1 3 2 ANDC ANDC #xx:8, CCR 1 BAND BAND #xx:3, Rd BAND #xx:3, @ERd BAND #xx:3, @aa:8 1 2 2 BRA d:8 (BT d:8) BRN d:8 (BF d:8) BHI d:8 BLS d:8 BCC d:8 (BHS d:8) BCS d:8 (BLO d:8) BNE d:8 BEQ d:8 BVC d:8 BVS d:8 BPL d:8 BMI d:8 BGE d:8 BLT d:8 BGT d:8 BLE d:8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Bcc 1 1 497 Instruction Mnemonic Instruction Branch Stack Byte Data Word Data Internal Fetch Addr. Read Operation Access Access Operation I J K L M N Bcc BRA d:16 (BT d:16) BRN d:16 (BF d:16) BHI d:16 BLS d:16 BCC d:16 (BHS d:16) BCS d:16 (BLO d:16) BNE d:16 BEQ d:16 BVC d:16 BVS d:16 BPL d:16 BMI d:16 BGE d:16 BLT d:16 BGT d:16 BLE d:16 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 BCLR BCLR #xx:3, Rd BCLR #xx:3, @ERd BCLR #xx:3, @aa:8 BCLR Rn, Rd BCLR Rn, @ERd BCLR Rn, @aa:8 1 2 2 1 2 2 BIAND #xx:3, Rd BIAND #xx:3, @ERd BIAND #xx:3, @aa:8 1 2 2 1 1 BILD #xx:3, Rd BILD #xx:3, @ERd BILD #xx:3, @aa:8 1 2 2 1 1 BIOR #xx:8, Rd BIOR #xx:8, @ERd BIOR #xx:8, @aa:8 1 2 2 1 1 BIST #xx:3, Rd BIST #xx:3, @ERd BIST #xx:3, @aa:8 1 2 2 2 2 BIXOR #xx:3, Rd BIXOR #xx:3, @ERd BIXOR #xx:3, @aa:8 1 2 2 1 1 BLD #xx:3, Rd BLD #xx:3, @ERd BLD #xx:3, @aa:8 1 2 2 1 1 BIAND BILD BIOR BIST BIXOR BLD 498 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Instruction Branch Stack Byte Data Word Data Internal Fetch Addr. Read Operation Access Access Operation I J K L M N Instruction Mnemonic BNOT BOR BSET BSR BNOT #xx:3, Rd BNOT #xx:3, @ERd BNOT #xx:3, @aa:8 BNOT Rn, Rd BNOT Rn, @ERd BNOT Rn, @aa:8 1 2 2 1 2 2 BOR #xx:3, Rd BOR #xx:3, @ERd BOR #xx:3, @aa:8 1 2 2 BSET #xx:3, Rd BSET #xx:3, @ERd BSET #xx:3, @aa:8 BSET Rn, Rd BSET Rn, @ERd BSET Rn, @aa:8 1 2 2 1 2 2 BSR d:8 2 1 Advanced 2 2 Normal 2 1 2 Advanced 2 2 2 BSR d:16 BST Normal BST #xx:3, Rd BST #xx:3, @ERd BST #xx:3, @aa:8 1 2 2 BTST #xx:3, Rd BTST #xx:3, @ERd BTST #xx:3, @aa:8 BTST Rn, Rd BTST Rn, @ERd BTST Rn, @aa:8 1 2 2 1 2 2 BXOR #xx:3, Rd BXOR #xx:3, @ERd BXOR #xx:3, @aa:8 1 2 2 CMP CMP.B #xx:8, Rd CMP.B Rs, Rd CMP.W #xx:16, Rd CMP.W Rs, Rd CMP.L #xx:32, ERd CMP.L ERs, ERd 1 1 2 1 3 1 DAA DAA Rd 1 DAS DAS Rd 1 BTST BXOR 2 2 2 2 1 1 2 2 2 2 2 2 1 1 1 1 1 1 499 Instruction Branch Stack Byte Data Word Data Internal Fetch Addr. Read Operation Access Access Operation I J K L M N Instruction Mnemonic DEC DEC.B Rd DEC.W #1/2, Rd DEC.L #1/2, ERd 1 1 1 DIVXS DIVXS.B Rs, Rd DIVXS.W Rs, ERd 2 2 12 20 DIVXU DIVXU.B Rs, Rd DIVXU.W Rs, ERd 1 1 12 20 EEPMOV EEPMOV.B EEPMOV.W 2 2 EXTS EXTS.W Rd EXTS.L ERd 1 1 EXTU EXTU.W Rd EXTU.L ERd 1 1 INC INC.B Rd INC.W #1/2, Rd INC.L #1/2, ERd 1 1 1 JMP JMP @ERn 2 JMP @aa:24 2 JMP @@aa:8 Normal 2 1 2 Advanced 2 2 2 JSR JSR @ERn Normal 1 Advanced 2 2 2 1 2 Advanced 2 2 2 JSR @@aa:8 Normal 500 2 2 JSR @aa:24 Normal LDC 2n + 2* 1 2n + 2* 1 2 1 1 Advanced 2 2 2 LDC #xx:8, CCR LDC Rs, CCR LDC @ERs, CCR LDC @(d:16, ERs), CCR LDC @(d:24, ERs), CCR LDC @ERs+, CCR LDC @aa:16, CCR LDC @aa:24, CCR 1 1 2 3 5 2 3 4 1 1 1 1 1 1 2 Instruction Mnemonic MOV Instruction Branch Stack Byte Data Word Data Internal Fetch Addr. Read Operation Access Access Operation I J K L M N MOV.B #xx:8, Rd MOV.B Rs, Rd MOV.B @ERs, Rd MOV.B @(d:16, ERs), Rd MOV.B @(d:24, ERs), Rd MOV.B @ERs+, Rd MOV.B @aa:8, Rd MOV.B @aa:16, Rd MOV.B @aa:24, Rd MOV.B Rs, @ERd MOV.B Rs, @(d:16, ERd) MOV.B Rs, @(d:24, ERd) MOV.B Rs, @-ERd MOV.B Rs, @aa:8 MOV.B Rs, @aa:16 MOV.B Rs, @aa:24 MOV.W #xx:16, Rd MOV.W Rs, Rd MOV.W @ERs, Rd MOV.W @(d:16, ERs), Rd MOV.W @(d:24, ERs), Rd MOV.W @ERs+, Rd MOV.W @aa:16, Rd MOV.W @aa:24, Rd MOV.W Rs, @ERd MOV.W Rs, @(d:16, ERd) MOV.W Rs, @(d:24, ERd) MOV.W Rs, @-ERd MOV.W Rs, @aa:16 MOV.W Rs, @aa:24 1 1 1 2 4 1 1 2 3 1 2 4 1 1 2 3 2 1 1 2 4 1 2 3 1 2 4 1 2 3 MOV.L #xx:32, ERd MOV.L ERs, ERd MOV.L @ERs, ERd M OV.L @( d:16, ERs) , ERd M OV.L @( d:24, ERs) , ERd MOV.L @ERs+, ERd MOV.L @aa:16, ERd MOV.L @aa:24, ERd MOV.L ERs, @ERd M OV.L ERs, @( d:16, ERd) M OV.L ERs, @( d:24, ERd) MOV.L ERs, @-ERd MOV.L ERs, @aa:16 MOV.L ERs, @aa:24 3 1 2 3 5 2 3 4 2 3 5 2 3 4 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 501 Instruction Branch Stack Byte Data Word Data Internal Fetch Addr. Read Operation Access Access Operation I J K L M N Instruction Mnemonic MOVFPE MOVFPE @aa:16, Rd*2 2 1 2 MOVTPE MOVTPE Rs, @aa:16* 2 MULXS MULXS.B Rs, Rd MULXS.W Rs, ERd 2 2 12 20 MULXU MULXU.B Rs, Rd MULXU.W Rs, ERd 1 1 12 20 NEG NEG.B Rd NEG.W Rd NEG.L ERd 1 1 1 NOP NOP 1 NOT NOT.B Rd NOT.W Rd NOT.L ERd 1 1 1 OR OR.B #xx:8, Rd OR.B Rs, Rd OR.W #xx:16, Rd OR.W Rs, Rd OR.L #xx:32, ERd OR.L ERs, ERd 1 1 2 1 3 2 ORC ORC #xx:8, CCR 1 POP POP.W Rn POP.L ERn 1 2 1 2 2 2 PUSH PUSH.W Rn PUSH.L ERn 1 2 1 2 2 2 ROTL ROTL.B Rd ROTL.W Rd ROTL.L ERd 1 1 1 ROTR ROTR.B Rd ROTR.W Rd ROTR.L ERd 1 1 1 ROTXL ROTXL.B Rd ROTXL.W Rd ROTXL.L ERd 1 1 1 ROTXR ROTXR.B Rd ROTXR.W Rd ROTXR.L ERd 1 1 1 RTE RTE 2 502 1 2 2 Instruction Branch Stack Byte Data Word Data Internal Fetch Addr. Read Operation Access Access Operation I J K L M N Instruction Mnemonic RTS RTS 2 1 2 Advanced 2 Normal 2 2 SHAL SHAL.B Rd SHAL.W Rd SHAL.L ERd 1 1 1 SHAR SHAR.B Rd SHAR.W Rd SHAR.L ERd 1 1 1 SHLL SHLL.B Rd SHLL.W Rd SHLL.L ERd 1 1 1 SHLR SHLR.B Rd SHLR.W Rd SHLR.L ERd 1 1 1 SLEEP SLEEP 1 STC STC CCR, Rd STC CCR, @ERd STC CCR, @( d:16, ERd) STC CCR, @( d:24, ERd) STC CCR, @-ERd STC CCR, @aa:16 STC CCR, @aa:24 1 2 3 5 2 3 4 SUB SUB.B Rs, Rd SUB.W #xx:16, Rd SUB.W Rs, Rd SUB.L #xx:32, ERd SUB.L ERs, ERd 1 2 1 3 1 SUBS SUBS #1/2/4, ERd 1 SUBX SUBX #xx:8, Rd SUBX Rs, Rd 1 1 TRAPA TRAPA #x:2 Normal 2 1 2 4 Advanced 2 2 2 4 XOR XOR.B #xx:8, Rd XOR.B Rs, Rd XOR.W #xx:16, Rd XOR.W Rs, Rd XOR.L #xx:32, ERd XOR.L ERs, ERd 1 1 2 1 3 2 XORC XORC #xx:8, CCR 1 1 1 1 1 1 1 2 Notes: *1 n is the value set in register R4L or R4. The source and destination are accessed n + 1 times each. *2 Not available in the H8/3008. 503 Appendix B Internal I/O Registers B.1 Address List Address Register (Low) Name Data Bus Width Bit 7 Bit Names Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 H'EE000 -- -- -- -- -- -- -- -- -- H'EE001 -- -- -- -- -- -- -- -- -- H'EE002 -- -- -- -- -- -- -- -- -- H'EE003 P4DDR 8 H'EE004 -- H'EE005 P6DDR 8 H'EE006 -- Module Name P4 7DDR P4 6DDR P4 5DDR P4 4DDR P4 3DDR P4 2DDR P4 1DDR P4 0DDR Port 4 -- -- -- -- -- -- P6 6DDR P6 5DDR P6 4DDR P6 3DDR P6 2DDR P6 1DDR P6 0DDR Port 6 -- -- -- -- P8 4DDR P8 3DDR P8 2DDR P8 1DDR P8 0DDR Port 8 -- -- -- -- -- -- -- H'EE007 P8DDR 8 -- -- -- H'EE008 P9DDR 8 -- -- P9 5DDR P9 4DDR P9 3DDR P9 2DDR P9 1DDR P9 0DDR Port 9 H'EE009 PADDR 8 PA7DDR PA6DDR PA5DDR PA4DDR PA3DDR PA2DDR PA1DDR PA0DDR Port A H'EE00A PBDDR 8 PB7DDR PB6DDR PB5DDR PB4DDR PB3DDR PB2DDR PB1DDR PB0DDR Port B H'EE00B -- -- -- -- -- -- -- -- -- H'EE00C -- -- -- -- -- -- -- -- -- H'EE00D -- -- -- -- -- -- -- -- -- H'EE00E -- -- -- -- -- -- -- -- -- H'EE00F -- -- -- -- -- -- -- -- -- H'EE010 -- -- -- -- -- -- -- -- -- H'EE011 MDCR 8 -- -- -- -- -- MDS2 MDS1 MDS0 H'EE012 SYSCR 8 SSBY STS2 STS1 STS0 UE NMIEG SSOE RAME H'EE013 BRCR 8 A23E A22E A21E A20E -- -- -- BRLE H'EE014 ISCR 8 -- -- IRQ5SC IRQ4SC IRQ3SC IRQ2SC IRQ1SC IRQ0SC Interrupt H'EE015 IER 8 -- -- IRQ5E IRQ4E IRQ3E IRQ2E IRQ1E IRQ0E H'EE016 ISR 8 -- -- IRQ5F IRQ4F IRQ3F IRQ2F IRQ1F IRQ0F -- -- -- -- -- -- -- -- H'EE018 IPRA 8 IPRA7 IPRA6 IPRA5 IPRA4 IPRA3 IPRA2 IPRA1 IPRA0 H'EE019 IPRB 8 IPRB7 IPRB6 -- -- IPRB3 IPRB2 -- -- H'EE01A DASTCR 8 -- -- -- -- -- -- -- DASTE D/A converter DIV0 System control H'EE017 -- System control Bus controller controller H'EE01B DIVCR 8 -- -- -- -- -- -- DIV1 H'EE01C MSTCRH 8 PSTOP -- -- -- -- -- MSTPH1 MSTPH0 H'EE01D MSTCRL 8 -- -- -- MSTPL4 MSTPL3 MSTPL2 -- MSTPL0 H'EE01E ADRCR 8 -- -- -- -- -- -- -- ADRCTL Bus controller H'EE01F CSCR 8 CS7E CS6E CS5E CS4E -- -- -- -- 504 Bit Names Address Register (Low) Name Data Bus Width Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Module Name H'EE020 ABWCR 8 ABW7 ABW6 ABW5 ABW4 ABW3 ABW2 ABW1 ABW0 Bus controller H'EE021 ASTCR 8 AST7 AST6 AST5 AST4 AST3 AST2 AST1 AST0 H'EE022 WCRH 8 W71 W70 W61 W60 W51 W50 W41 W40 H'EE023 WCRL 8 W31 W30 W21 W20 W11 W10 W01 W00 H'EE024 BCR 8 ICIS1 ICIS0 --* 1 --* 1 --* 1 --* 1 RDEA WAITE -- -- -- -- -- -- -- -- H'EE025 -- H'EE026 Reserved area (access prohibited) H'EE027 H'EE028 H'EE029 H'EE02A H'EE02B H'EE02C H'EE02D H'EE02E H'EE02F H'EE030 Reserved area (access prohibited) H'EE031 H'EE032 H'EE033 H'EE034 H'EE035 H'EE036 H'EE037 H'EE038 H'EE039 H'EE03A H'EE03B H'EE03C H'EE03D H'EE03E P4PCR 8 P4 7PCR P4 6PCR P4 5PCR P4 4PCR P4 3PCR P4 2PCR P4 1PCR P4 0PCR Port 4 H'EE03F 505 Address Register (Low) Name Data Bus Width Bit 7 Bit Names Bit 6 H'EE040 Reserved area (access prohibited) H'EE041 H'EE042 H'EE043 H'EE044 H'EE045 H'EE046 H'EE047 H'EE048 H'EE049 H'EE04A H'EE04B H'EE04C H'EE04D H'EE04E H'EE04F H'EE050 Reserved area (access prohibited) H'EE051 H'EE052 H'EE053 H'EE054 H'EE055 H'EE056 H'EE057 H'EE058 H'EE059 H'EE05A H'EE05B H'EE05C H'EE05D H'EE05E H'EE05F 506 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Module Name Address Register (Low) Name Data Bus Width Bit 7 Bit Names Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Module Name H'EE060 Reserved area (access prohibited) H'EE061 H'EE062 H'EE063 H'EE064 H'EE065 H'EE066 H'EE067 H'EE068 H'EE069 H'EE06A H'EE06B H'EE06C H'EE06D H'EE06E H'EE06F H'EE070 Reserved area (access prohibited) H'EE071 H'EE072 H'EE073 H'EE074 H'EE075 H'EE076 H'EE077 H'EE078 H'EE079 H'EE07A H'EE07B H'EE07C H'EE07D H'EE07E H'EE07F 507 Address Register (Low) Name Data Bus Width Bit 7 Bit Names Bit 6 H'EE080 Reserved area (access prohibited) H'EE081 H'EE082 H'EE083 H'EE084 H'EE085 H'EE086 H'EE087 H'EE088 H'EE089 H'EE08A H'EE08B H'EE08C H'EE08D H'EE08E H'EE08F H'EE090 Reserved area (access prohibited) H'EE091 H'EE092 H'EE093 H'EE094 H'EE095 H'EE096 H'EE097 H'EE098 H'EE099 H'EE09A H'EE09B H'EE09C H'EE09D H'EE09E H'EE09F 508 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Module Name Address Register (Low) Name Data Bus Width Bit 7 Bit Names Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Module Name H'EE0A0 Reserved area (access prohibited) H'EE0A1 H'EE0A2 H'EE0A3 H'EE0A4 H'EE0A5 H'EE0A6 H'EE0A7 H'EE0A8 H'EE0A9 H'EE0AA H'EE0AB H'EE0AC H'EE0AD H'EE0AE H'EE0AF H'EE0B0 Reserved area (access prohibited) H'EE0B1 H'EE0B2 H'EE0B3 H'EE0B4 H'EE0B5 H'EE0B6 H'EE0B7 H'EE0B8 H'EE0B9 H'EE0BA H'EE0BB H'EE0BC H'EE0BD H'EE0BE H'EE0BF 509 Address Register (Low) Name Data Bus Width Bit 7 Bit Names Bit 6 H'EE0C0 Reserved area (access prohibited) H'EE0C1 H'EE0C2 H'EE0C3 H'EE0C4 H'EE0C5 H'EE0C6 H'EE0C7 H'EE0C8 H'EE0C9 H'EE0CA H'EE0CB H'EE0CC H'EE0CD H'EE0CE H'EE0CF H'EE0D0 Reserved area (access prohibited) H'EE0D1 H'EE0D2 H'EE0D3 H'EE0D4 H'EE0D5 H'EE0D6 H'EE0D7 H'EE0D8 H'EE0D9 H'EE0DA H'EE0DB H'EE0DC H'EE0DD H'EE0DE H'EE0DF 510 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Module Name Address Register (Low) Name Data Bus Width Bit 7 Bit Names Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Module Name H'EE0E0 Reserved area (access prohibited) H'EE0E1 H'EE0E2 H'EE0E3 H'EE0E4 H'EE0E5 H'EE0E6 H'EE0E7 H'EE0E8 H'EE0E9 H'EE0EA H'EE0EB H'EE0EC H'EE0ED H'EE0EE H'EE0EF H'EE0F0 Reserved area (access prohibited) H'EE0F1 H'EE0F2 H'EE0F3 H'EE0F4 H'EE0F5 H'EE0F6 H'EE0F7 H'EE0F8 H'EE0F9 H'EE0FA H'EE0FB H'EE0FC H'EE0FD H'EE0FE H'EE0FF 511 Address Register (Low) Name Data Bus Width Bit 7 Bit Names Bit 6 H'FFF20 Reserved area (access prohibited) H'FFF21 H'FFF22 H'FFF23 H'FFF24 H'FFF25 H'FFF26 H'FFF27 H'FFF28 H'FFF29 H'FFF2A H'FFF2B H'FFF2C H'FFF2D H'FFF2E H'FFF2F H'FFF30 Reserved area (access prohibited) H'FFF31 H'FFF32 H'FFF33 H'FFF34 H'FFF35 H'FFF36 H'FFF37 H'FFF38 H'FFF39 H'FFF3A H'FFF3B H'FFF3C H'FFF3D H'FFF3E H'FFF3F 512 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Module Name Address Register (Low) Name Data Bus Width Bit 7 Bit Names Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 H'FFF40 -- -- -- -- -- -- -- -- -- H'FFF41 -- -- -- -- -- -- -- -- -- H'FFF42 -- -- -- -- -- -- -- -- -- H'FFF43 -- -- -- -- -- -- -- -- -- H'FFF44 -- -- -- -- -- -- -- -- -- H'FFF45 -- -- -- -- -- -- -- -- -- H'FFF46 -- -- -- -- -- -- -- -- -- H'FFF47 -- -- -- -- -- -- -- -- -- H'FFF48 -- -- -- -- -- -- -- -- -- H'FFF49 -- -- -- -- -- -- -- -- -- H'FFF4A -- -- -- -- -- -- -- -- -- H'FFF4B -- -- -- -- -- -- -- -- -- H'FFF4C -- -- -- -- -- -- -- -- -- H'FFF4D -- -- -- -- -- -- -- -- -- H'FFF4E -- -- -- -- -- -- -- -- -- H'FFF4F -- -- -- -- -- -- -- -- -- H'FFF50 -- -- -- -- -- -- -- -- -- H'FFF51 -- -- -- -- -- -- -- -- -- H'FFF52 -- -- -- -- -- -- -- -- -- H'FFF53 -- -- -- -- -- -- -- -- -- H'FFF54 -- -- -- -- -- -- -- -- -- H'FFF55 -- -- -- -- -- -- -- -- -- H'FFF56 -- -- -- -- -- -- -- -- -- H'FFF57 -- -- -- -- -- -- -- -- -- H'FFF58 -- -- -- -- -- -- -- -- -- H'FFF59 -- -- -- -- -- -- -- -- -- H'FFF5A -- -- -- -- -- -- -- -- -- H'FFF5B -- -- -- -- -- -- -- -- -- H'FFF5C -- -- -- -- -- -- -- -- -- H'FFF5D -- -- -- -- -- -- -- -- -- H'FFF5E -- -- -- -- -- -- -- -- -- H'FFF5F -- -- -- -- -- -- -- -- -- Module Name 513 Bit Names Address Register (Low) Name Data Bus Width Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 H'FFF60 TSTR 8 -- -- -- -- STR2 STR1 STR0 16-bit timer, (all channels) -- Module Name H'FFF61 TSNC 8 -- -- -- -- -- SYNC2 SYNC1 SYNC0 H'FFF62 TMDR 8 -- MDF FDIR -- -- PWM2 PWM1 PWM0 H'FFF63 TOLR 8 -- -- TOB2 TOA2 TOB1 TOA1 TOB0 TOA0 H'FFF64 TISRA 8 -- IMIEA2 IMIEA1 IMIEA0 -- IMFA2 IMFA1 IMFA0 H'FFF65 TISRB 8 -- IMIEB2 IMIEB1 IMIEB0 -- IMFB2 IMFB1 IMFB0 H'FFF66 TISRC 8 -- OVIE2 OVIE1 OVIE0 -- OVF2 OVF1 OVF0 -- -- -- -- -- -- -- -- 8 -- CCLR1 CCLR0 CKEG1 CKEG0 TPSC2 TPSC1 TPSC0 16-bit timer channel 0 H'FFF67 -- H'FFF68 16TCR0 H'FFF69 TIOR0 8 -- IOB2 IOB1 IOB0 -- IOA2 IOA1 IOA0 -- CCLR1 CCLR0 CKEG1 CKEG0 TPSC2 TPSC1 TPSC0 16-bit timer channel 1 H'FFF6A 16TCNT0H 16 H'FFF6B 16TCNT0L H'FFF6C GRA0H 16 H'FFF6D GRA0L H'FFF6E GRB0H 16 H'FFF6F GRB0L H'FFF70 16TCR1 H'FFF71 TIOR1 8 8 -- IOB2 IOB1 IOB0 -- IOA2 IOA1 IOA0 -- CCLR1 CCLR0 CKEG1 CKEG0 TPSC2 TPSC1 TPSC0 16-bit timer IOA0 channel 2 H'FFF72 16TCNT1H 16 H'FFF73 16TCNT1L H'FFF74 GRA1H 16 H'FFF75 GRA1L H'FFF76 GRB1H 16 H'FFF77 GRB1L H'FFF78 16TCR2 H'FFF79 TIOR2 8 8 H'FFF7A 16TCNT2H 16 H'FFF7B 16TCNT2L H'FFF7C GRA2H 16 H'FFF7D GRA2L H'FFF7E GRB2H H'FFF7F GRB2L 514 16 -- IOB2 IOB1 IOB0 -- IOA2 IOA1 Bit Names Address Register (Low) Name Data Bus Width Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 H'FFF80 8TCR0 16 CMIEA OVIE CCLR1 CCLR0 CKS2 CKS1 CKS0 8-bit timer channels 0 and 1 CMIEB H'FFF81 8TCR1 16 CMIEB CMIEA OVIE CCLR1 CCLR0 CKS2 CKS1 CKS0 H'FFF82 8TCSR0 16 CMFB CMFA OVF ADTE OIS3 OIS2 OS1 OS0 H'FFF83 8TCSR1 16 CMFB CMFA OVF ICE OIS3 OIS2 OS1 OS0 H'FFF84 TCORA0 16 H'FFF85 TCORA1 16 H'FFF86 TCORB0 16 -- -- -- -- -- -- -- -- H'FFF87 TCORB1 16 H'FFF88 8TCNT0 16 H'FFF89 8TCNT1 16 H'FFF8A -- H'FFF8B -- Module Name -- -- -- -- -- -- -- -- OVF WT/IT TME -- -- CKS2 CKS1 CKS0 -- -- -- -- -- -- -- -- H'FFF8F RSTCSR* 8 WRST RSTOE -- -- -- -- -- -- H'FFF90 8TCR2 CMIEB CMIEA CCLR1 CCLR0 CKS2 CKS1 CKS0 8-bit timer channels 2 and 3 H'FFF8C TCSR* 2 8 2 8 H'FFF8D TCNT* H'FFF8E -- 2 16 OVIE H'FFF91 8TCR3 16 CMIEB CMIEA OVIE CCLR1 CCLR0 CKS2 CKS1 CKS0 H'FFF92 8TCSR2 16 CMFB CMFA OVF -- OIS3 OIS2 OS1 OS0 H'FFF93 8TCSR3 16 CMFB CMFA OVF ICE OIS3 OIS2 OS1 OS0 H'FFF94 TCORA2 16 H'FFF95 TCORA3 16 H'FFF96 TCORB2 16 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- H'FFF97 TCORB3 16 H'FFF98 8TCNT2 16 H'FFF99 8TCNT3 16 H'FFF9A -- H'FFF9B -- H'FFF9C DADR0 8 H'FFF9D DADR1 8 H'FFF9E DACR 8 DAOE1 DAOE0 DAE -- -- -- -- -- H'FFF9F -- 8 -- -- -- -- -- -- -- -- WDT D/A converter 515 Bit Names Address Register (Low) Name Data Bus Width Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 H'FFFA0 TPMR 8 -- -- -- -- G3NOV G2NOV G1NOV G0NOV TPC H'FFFA1 TPCR 8 G3CMS1 G3CMS0 G2CMS1 G2CMS0 G1CMS1 G1CMS0 G0CMS1 G0CMS0 H'FFFA2 NDERB 8 NDER15 NDER14 NDER13 NDER12 NDER11 NDER10 NDER9 Bit 2 Bit 1 Bit 0 NDER8 H'FFFA3 NDERA 8 NDER7 NDER6 NDER5 NDER4 NDER3 NDER2 NDER1 NDER0 H'FFFA4 NDRB* 3 8 NDR15 NDR14 NDR13 NDR12 NDR11 NDR10 NDR9 NDR8 NDR15 NDR14 NDR13 NDR12 -- -- -- -- H'FFFA5 NDRA* 3 8 NDR7 NDR6 NDR5 NDR4 NDR3 NDR2 NDR1 NDR0 NDR7 NDR6 NDR5 NDR4 -- -- -- -- H'FFFA6 NDRB* 3 8 -- -- -- -- -- -- -- -- -- -- -- -- NDR11 NDR10 NDR9 NDR8 H'FFFA7 NDRA* 3 8 -- -- -- -- -- -- -- -- -- -- -- -- NDR3 NDR2 NDR1 NDR0 H'FFFA8 -- -- -- -- -- -- -- -- -- H'FFFA9 -- -- -- -- -- -- -- -- -- H'FFFAA -- -- -- -- -- -- -- -- -- H'FFFAB -- -- -- -- -- -- -- -- -- H'FFFAC -- -- -- -- -- -- -- -- -- H'FFFAD -- -- -- -- -- -- -- -- -- H'FFFAE -- -- -- -- -- -- -- -- -- H'FFFAF -- H'FFFB0 SMR 8 H'FFFB1 BRR 8 H'FFFB2 SCR 8 H'FFFB3 TDR 8 H'FFFB4 SSR 8 H'FFFB5 RDR 8 H'FFFB6 SCMR 8 Module Name -- -- -- -- -- -- -- -- C/A CHR PE O/E STOP MP CKS1 CKS0 TIE RIE TE RE MPIE TEIE CKE1 CKE0 TDRE RDRF ORER FER/ERSPER TEND MPB MPBT -- -- -- -- SDIR SINV -- SMIF SCI channel 0 H'FFFB7 Reserved area (access prohibited) H'FFFB8 SMR 8 H'FFFB9 BRR 8 H'FFFBA SCR 8 H'FFFBB TDR 8 H'FFFBC SSR 8 H'FFFBD RDR 8 H'FFFBE SCMR 8 C/A CHR PE O/E STOP MP CKS1 CKS0 TIE RIE TE RE MPIE TEIE CKE1 CKE0 TDRE RDRF ORER FER/ERSPER TEND MPB MPBT -- -- -- -- SINV -- SMIF H'FFFBF Reserved area (access prohibited) 516 SDIR SCI channel 1 Address Register (Low) Name Data Bus Width Bit 7 Bit Names Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Module Name H'FFFC0 Reserved area (access prohibited) H'FFFC1 H'FFFC2 H'FFFC3 H'FFFC4 H'FFFC5 H'FFFC6 H'FFFC7 H'FFFC8 H'FFFC9 H'FFFCA H'FFFCB H'FFFCC H'FFFCD H'FFFCE H'FFFCF H'FFFD0 -- -- -- -- -- -- -- -- -- H'FFFD1 -- -- -- -- -- -- -- -- -- H'FFFD2 -- -- -- -- -- -- -- -- -- P4 7 P4 6 P4 5 P4 4 P4 3 P4 2 P4 1 P4 0 -- -- -- -- -- -- -- -- H'FFFD3 P4DR 8 H'FFFD4 -- Port 4 H'FFFD5 P6DR 8 P6 7 P6 6 P6 5 P6 4 P6 3 P6 2 P6 1 P6 0 Port 6 H'FFFD6 P7DR 8 P7 7 P7 6 P7 5 P7 4 P7 3 P7 2 P7 1 P7 0 Port 7 H'FFFD7 P8DR 8 -- -- -- P8 4 P8 3 P8 2 P8 1 P8 0 Port 8 H'FFFD8 P9DR 8 -- -- P9 5 P9 4 P9 3 P9 2 P9 1 P9 0 Port 9 H'FFFD9 PADR 8 PA7 PA6 PA5 PA4 PA3 PA2 PA1 PA0 Port A H'FFFDA PBDR 8 PB7 PB6 PB5 PB4 PB3 PB2 PB1 PB0 Port B H'FFFDB -- -- -- -- -- -- -- -- -- H'FFFDC -- -- -- -- -- -- -- -- -- H'FFFDD -- -- -- -- -- -- -- -- -- H'FFFDE -- -- -- -- -- -- -- -- -- H'FFFDF -- -- -- -- -- -- -- -- -- 517 Bit Names Address Register (Low) Name Data Bus Width Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Module Name H'FFFE0 ADDRAH 8 AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 A/D converter H'FFFE1 ADDRAL 8 AD1 AD0 -- -- -- -- -- -- H'FFFE2 ADDRBH 8 AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 H'FFFE3 ADDRBL 8 AD1 AD0 -- -- -- -- -- -- H'FFFE4 ADDRCH 8 AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 H'FFFE5 ADDRCL 8 AD1 AD0 -- -- -- -- -- -- H'FFFE6 ADDRDH 8 AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 H'FFFE7 ADDRDL 8 AD1 AD0 -- -- -- -- -- -- H'FFFE8 ADCSR 8 ADF ADIE ADST SCAN CKS CH2 CH1 CH0 H'FFFE9 ADCR 8 TRGE -- -- -- -- -- -- -- Notes: *1 Writing to bits 5 to 2 of BCR is prohibited. *2 For the procedure for writing to TCSR, TCNT, and RSTCSR, see section 11.2.4, Notes on Register Rewriting. *3 The address depends on the output trigger setting. Legend: WDT: Watchdog timer TPC: Programmable timing pattern controller SCI: Serial communication interface 518 B.2 Functions Register abbreviation Register name Name of on-chip supporting module Address to which register is mapped TIER--Timer Interrupt Enable Register H' 90 FRT Bit numbers Bit Initial bit values Initial value R/W: 7 6 5 4 ICIAE ICIBE ICICE 0 R/W 0 R/W 0 R/W 3 2 OCIDE OCIAE OCIBE 0 R/W 0 R/W 1 R/W Read only W Write only 0 OVIE 1 R/W 1 Names of the bits. Dashes (--) indicate reserved bits. Timer overflow interrupt enable Possible types of access R 1 R/W Read and write 0 Interrupt requested by OVF flag is disabled 1 Interrupt requested by OVF flag is enabled Output compare interrupt B enable 0 Interrupt requested by OCFB flag is disabled 1 Interrupt requested by OCFB flag is enabled Full name of bit Output compare interrupt A enable 0 Interrupt requested by OCFA flag is disabled 1 Interrupt requested by OCFA flag is enabled Descriptions of bit settings Input capture interrupt D enable 0 Interrupt requested by ICFD flag is disabled 1 Interrupt requested by ICFD flag is enabled 519 P4DDR--Port 4 Data Direction Register Bit 7 6 H'EE003 5 4 3 2 Port 4 1 0 P47DDR P46DDR P45DDR P44DDR P43DDR P42DDR P41DDR P40DDR Initial value Read/Write 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W Port 4 input/output select 0 Generic input 1 Generic output P6DDR--Port 6 Data Direction Register Bit 7 6 H'EE005 5 4 3 2 Port 6 1 0 P66DDR P65DDR P64DDR P63DDR P62DDR P61DDR P60DDR Initial value Read/Write 1 0 W 0 W 0 W 0 W 0 W Port 6 input/output select 520 0 Generic input 1 Generic output 0 W 0 W P8DDR--Port 8 Data Direction Register Bit 7 6 H'EE007 5 3 4 Port 8 2 1 0 P84DDR P83DDR P82DDR P81DDR P80DDR Modes 1 to 4 Initial value Read/Write 1 1 1 1 W 0 W 0 W 0 W 0 W Modes 5 to 7 Initial value Read/Write 1 1 1 0 W 0 W 0 W 0 W 0 W Port 8 input/output select P9DDR--Port 9 Data Direction Register Bit 7 6 5 0 Generic input 1 Generic output H'EE008 4 3 2 Port 9 1 0 P95DDR P94DDR P93DDR P92DDR P91DDR P90DDR Initial value Read/Write 1 1 0 W 0 W 0 W 0 W 0 W 0 W Port 9 input/output select 0 Generic input 1 Generic output 521 PADDR--Port A Data Direction Register 7 Bit 6 H'EE009 5 3 4 Port A 2 1 0 PA7DDR PA6DDR PA5DDR PA4DDR PA3DDR PA2DDR PA1DDR PA0DDR Modes 3 and 4 Modes 1 and 2 Initial value Read/Write 1 0 W 0 W 0 W 0 W 0 W 0 W 0 W Initial value Read/Write 0 W 0 W 0 W 0 W 0 W 0 W 0 W 0 W Port A input/output select 0 Generic input 1 Generic output PBDDR--Port B Data Direction Register Bit 7 6 H'EE00A 5 4 3 2 Port B 1 0 PB7DDR PB6DDR PB5DDR PB4DDR PB3DDR PB2DDR PB1DDR PB0DDR Initial value Read/Write 0 W 0 W 0 W 0 W 0 W 0 W Port B input/output select 522 0 Generic input 1 Generic output 0 W 0 W MDCR--Mode Control Register Bit Initial value Read/Write 7 1 6 1 H'EE011 5 0 4 0 3 System control 2 1 0 MDS2 MDS1 MDS0 * 0 R * R * R Mode select 2 to 0 Bit 2 Bit 1 Bit 0 MD2 MD1 MD0 0 0 1 0 1 1 Operating Mode 0 1 Mode 1 0 Mode 2 1 Mode 3 0 Mode 4 1 Mode 5 0 Mode 6 1 Mode 7 Note: * Determined by the state of the mode pins (MD2 to MD0). 523 SYSCR--System Control Register Bit Initial value Read/Write H'EE012 System control 7 6 5 4 3 2 1 0 SSBY STS2 STS1 STS0 UE NMIEG SSOE RAME 0 R/W 0 R/W 0 R/W 0 R/W 1 R/W 0 R/W 0 R/W 1 R/W RAM enable 0 1 On-chip RAM is disabled On-chip RAM is enabled Software standby output port enable 0 1 In software standby mode, all address bus and bus control signals are highimpedance In software standby mode, address bus retains output state and bus control signals are fixed high NMI edge select 0 1 An interrupt is requested at the falling edge of NMI An interrupt is requested at the rising edge of NMI User bit enable 0 1 CCR bit 6 (UI) is used as an interrupt mask bit CCR bit 6 (UI) is used as a user bit Standby timer select 2 to 0 Bit 6 STS2 Bit 5 STS1 0 0 1 0 1 1 Bit 4 STS0 0 1 0 1 0 1 0 1 Standby Timer Waiting Time = 8,192 states Waiting Time = 16,384 states Waiting Time = 32,768 states Waiting Time = 65,536 states Waiting Time = 131,072 states Waiting Time = 26,2144 states Waiting Time = 1,024 states Illegal setting Software standby 0 1 524 SLEEP instruction causes transition to sleep mode SLEEP instruction causes transition to software standby mode BRCR--Bus Release Control Register Bit H'EE013 7 6 5 4 3 A23E A22E A21E A20E Bus controller 2 1 0 BRLE Modes 1 and 2 Initial value Read/Write 1 1 1 1 1 1 1 0 R/W Modes 3 and 4 Initial value Read/Write 1 R/W 1 R/W 1 R/W 0 1 1 1 0 R/W Bus release enable Address 23 to 20 enable 0 Address output 1 Other input/output 0 1 ISCR--IRQ Sense Control Register Bit 7 H'EE014 5 6 4 3 2 The bus cannot be released to an external device The bus can be released to an external device Interrupt Controller 0 1 IRQ5SC IRQ4SC IRQ3SC IRQ2SC IRQ1SC IRQ0SC Initial value Read/Write 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W IRQ5 to IRQ0 sense control 0 Interrupts are requested when IRQ5 to IRQ0 are low 1 Interrupts are requested by falling-edge input at IRQ5 to IRQ0 525 IER--IRQ Enable Register Bit Initial value Read/Write H'EE015 7 6 0 R/W 0 R/W Interrupt Controller 5 4 3 2 1 0 IRQ5E IRQ4E IRQ3E IRQ2E IRQ1E IRQ0E 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W IRQ5 to IRQ0 enable 0 IRQ5 to IRQ0 interrupts are disabled 1 IRQ5 to IRQ0 interrupts are enabled ISR--IRQ Status Register Bit Initial value Read/Write H'EE016 6 7 0 0 Interrupt Controller 5 4 3 2 1 0 IRQ5F IRQ4F IRQ3F IRQ2F IRQ1F IRQ0F 0 R/(W)* 0 R/(W)* 0 R/(W)* 0 R/(W)* 0 R/(W)* 0 R/(W)* IRQ5 to IRQ0 flags Bits 5 to 0 IRQ5F to IRQ0F Setting and Clearing Conditions [Clearing conditions] * Read IRQnF when IRQnF = 1, then write 0 in IRQnF. 0 * IRQnSC = 0, IRQn input is high, and interrupt exception handling is being carried out. * IRQnSC = 1 and IRQn interrupt exception handling is being carried out. [Setting conditions] 1 * IRQnSC = 0 and IRQn input is low. * IRQnSC = 1 and IRQn input changes from high to low. (n = 5 to 0) Note: * Only 0 can be written to clear the flag. 526 IPRA--Interrupt Priority Register A Interrupt Controller 7 6 5 4 3 2 1 0 IPRA7 IPRA6 IPRA5 IPRA4 IPRA3 IPRA2 IPRA1 IPRA0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Bit Initial value Read/Write H'EE018 Priority level A7 to A0 0 Priority level 0 (low priority) 1 Priority level 1 (high priority) * Interrupt sources controlled by each bit Bit IPRA Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 IPRA7 IPRA6 IPRA5 IPRA4 IPRA3 IPRA2 IPRA1 IPRA0 IRQ0 IRQ1 IRQ2, IRQ4, WDT, 16-bit 16-bit 16-bit IRQ3 IRQ5 A/D con- timer timer timer verter channel 0 channel 1 channel 2 Interrupt source IPRB--Interrupt Priority Register B Bit Initial value Read/Write 7 6 IPRB7 IPRB6 0 R/W 0 R/W H'EE019 4 5 0 R/W 0 R/W 3 2 IPRB3 IPRB2 0 R/W 0 R/W Interrupt Controller 1 0 0 R/W 0 R/W Priority level B7, B6, B3, and B2 0 Priority level 0 (low priority) 1 Priority level 1 (high priority) * Interrupt sources controlled by each bit Bit IPRB Bit 7 Bit 6 IPRB7 IPRB6 8-bit timer 8-bit timer Interrupt channels channels source 0 and 1 2 and 3 Bit 5 Bit 4 Bit 3 Bit 2 IPRB3 IPRB2 SCI SCI Bit 1 Bit 0 channel 0 channel 1 527 DASTCR--D/A Standby Control Register Bit 7 6 5 H'EE01A 4 3 2 D/A 0 1 DASTE Initial value Read/Write 1 1 1 1 1 1 1 0 R/W D/A standby enable 528 0 D/A output is disabled in software standby mode 1 D/A output is enabled in software standby mode (Initial value) DIVCR--Division Control Register Bit Initial value Read/Write 7 1 6 1 H'EE01B 5 1 4 1 3 1 2 1 System control 1 0 DIV1 DIV0 0 R/W 0 R/W Division ratio bits 1 and 0 Bit 1 Bit 0 DIV1 DIV0 0 1 Frequency Division Ratio 0 1/1 1 1/2 0 1/4 1 1/8 (Initial value) 529 MSTCRH--Module Standby Control Register H 7 Bit H'EE01C 6 5 4 3 2 1 1 1 1 0 PSTOP Initial value 0 Read/Write R/W 1 System control 0 MSTPH1 MSTPH0 R/W 0 R/W 0 R/W Module standby H1 to H0 Selection bits for placing modules in standby state. Reserved bits clock stop Enables or disables o clock output. MSTCRL--Module Standby Control Register L H'EE01D 4 3 2 System control 1 Bit 7 6 5 Initial value 0 0 0 0 0 0 0 Read/Write R/W R/W R/W R/W R/W R/W R/W MSTPL4 MSTPL3 MSTPL2 MSTPL0 Module standby L4 to L2, L0 Selection bits for placing modules in standby state. Reserved bits 530 0 0 R/W ADRCR--Address Control Register Bit H'EE01E Bus controller 7 6 5 4 3 2 1 0 -- -- -- -- -- -- -- ADRCTL Initial value 1 1 1 1 1 1 1 1 Read/Write -- -- -- -- -- -- -- R/W Reserved bits Address control Selects address update mode 1 or address update mode 2. Description ADRCTL 0 Address update mode 2 is selected 1 Address update mode 1 is selected (Initial value) CSCR--Chip Select Control Register Bit Initial value Read/Write H'EE01F 7 6 5 4 CS7E CS6E CS5E CS4E 0 R/W 0 R/W 0 R/W 0 R/W Bus controller 3 2 1 0 1 1 1 1 Chip select 7 to 4 enable Bit n Description CSnE 0 Output of chip select signal CSn is disabled (Initial value) 1 Output of chip select signal CSn is enabled (n = 7 to 4) 531 ABWCR--Bus Width Control Register H'EE020 Bus controller 7 6 5 4 3 2 1 0 ABW7 ABW6 ABW5 ABW4 ABW3 ABW2 ABW1 ABW0 1 1 1 1 1 1 1 1 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Bit Modes Initial value 1 and 3 Modes Initial value 2 and 4 Read/Write Area 7 to 0 bus width control Bits 7 to 0 Bus Width of Access Area ABW7 to ABW0 0 Areas 7 to 0 are 16-bit access areas 1 Areas 7 to 0 are 8-bit access areas ASTCR--Access State Control Register Bit Initial value Read/Write H'EE021 Bus controller 7 6 5 4 3 2 1 0 AST7 AST6 AST5 AST4 AST3 AST2 AST1 AST0 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W Area 7 to 0 access state control Bits 7 to 0 AST7 Number of States in Access Area to AST0 532 0 Areas 7 to 0 are two-state access areas 1 Areas 7 to 0 are three-state access areas WCRH--Wait Control Register H Bit Initial value Read/Write H'EE022 7 6 5 4 3 2 1 0 W71 W70 W61 W60 W51 W50 W41 W40 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W Bus controller Area 4 wait control 1 and 0 0 No program wait is inserted 0 1 1 program wait state is inserted 1 0 2 program wait states are inserted 1 3 program wait states are inserted Area 5 wait control 1 and 0 0 No program wait is inserted 0 1 1 program wait state is inserted 1 0 2 program wait states are inserted 1 3 program wait states are inserted Area 6 wait control 1 and 0 0 No program wait is inserted 0 1 1 program wait state is inserted 1 0 2 program wait states are inserted 1 3 program wait states are inserted Area 7 wait control 1 and 0 0 No program wait is inserted 0 1 1 program wait state is inserted 1 0 2 program wait states are inserted 1 3 program wait states are inserted 533 WCRL--Wait Control Register L Bit Initial value Read/Write H'EE023 Bus controller 7 6 5 4 3 2 1 0 W31 W30 W21 W20 W11 W10 W01 W00 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W Area 0 wait control 1 and 0 0 1 0 No program wait is inserted 1 1 program wait state is inserted 0 2 program wait states are inserted 1 3 program wait states are inserted Area 1 wait control 1 and 0 0 1 0 No program wait is inserted 1 1 program wait state is inserted 0 2 program wait states are inserted 1 3 program wait states are inserted Area 2 wait control 1 and 0 0 1 0 No program wait is inserted 1 1 program wait state is inserted 0 2 program wait states are inserted 1 3 program wait states are inserted Area 3 wait control 1 and 0 0 1 534 0 No program wait is inserted 1 1 program wait state is inserted 0 2 program wait states are inserted 1 3 program wait states are inserted BCR--Bus Control Register Bit Initial value Read/Write H'EE024 Bus controller 7 6 5 4 3 2 1 0 ICIS1 ICIS0 -- -- -- -- RDEA WAITE 1 R/W 1 R/W 0*1 -- 0*1 -- 0*1 -- 1*2 -- 1 R/W 0 R/W Wait pin enable 0 WAIT pin wait input is disabled 1 WAIT pin wait input is enabled Area division unit select 0 1 Area divisions are as follows: Area 0: 2 Mbytes Area 4: 1.93 Mbytes Area 1: 2 Mbytes Area 2: 8 Mbytes Area 3: 2 Mbytes Area 5: 4 kbytes Area 6: 23.75 kbytes Area 7: 22 bytes Areas 0 to 7 are the same size (2 Mbytes) Idle cycle insertion 0 0 No idle cycle is inserted in case of consecutive external read and write cycles 1 Idle cycle is inserted in case of consecutive external read and write cycles Idle cycle insertion 1 0 No idle cycle is inserted in case of consecutive external read cycles for different areas 1 Idle cycle is inserted in case of consecutive external read cycles for different areas Notes: *1 These bits can be read and written, but must not be set to 1. Normal operation cannot be guaranteed if 1 is written in these bits. *2 0 must not be written in bit 2. 535 P4PCR--Port 4 Input Pull-Up Control Register Bit 7 6 5 H'EE03E 4 3 2 Port 4 1 0 P47PCR P46PCR P45PCR P44PCR P43PCR P42PCR P41PCR P40PCR Initial value Read/Write 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Port 4 input pull-up control 7 to 0 0 Input pull-up transistor is off 1 Input pull-up transistor is on Note: Valid when the corresponding P4DDR bit is cleared to 0 (designating generic input). 536 TSTR--Timer Start Register H'FFF60 16-bit timer (all channels) 7 6 5 4 3 2 1 0 -- -- -- -- -- STR2 STR1 STR0 Initial value 1 1 1 1 1 0 0 0 Read/Write -- -- -- -- -- R/W R/W R/W Bit Reserved bits Counter start 0 0 16TCNT0 is halted 1 16TCNT0 is counting (Initial value) Counter start 1 0 16TCNT1 is halted 1 16TCNT1 is counting (Initial value) Counter start 2 0 16TCNT2 is halted 1 16TCNT2 is counting (Initial value) 537 TSNC--Timer Synchro Register H'FFF61 16-bit timer (all channels) 7 6 5 4 3 -- -- -- -- -- Initial value 1 1 1 1 1 0 0 0 Read/Write -- -- -- -- -- R/W R/W R/W Bit 2 1 0 SYNC2 SYNC1 SYNC0 Reserved bits Timer sync 0 0 Channel 0 timer counter (16TCNT0) operates independently (16TCNT0 presetting/clearing is independent of other channels) (Initial value) 1 Channel 0 operates synchronously Synchronous presetting/synchronous clearing of 16TCNT0 is possible Timer sync 1 0 Channel 1 timer counter (16TCNT1) operates independently (16TCNT1 presetting/clearing is independent of other channels) (Initial value) 1 Channel 1 operates synchronously Synchronous presetting/synchronous clearing of 16TCNT1 is possible Timer sync 2 538 0 Channel 2 timer counter (16TCNT2) operates independently (16TCNT2 presetting/clearing is independent of other channels) (Initial value) 1 Channel 2 operates synchronously Synchronous presetting/synchronous clearing of 16TCNT2 is possible TMDR--Timer Mode Register H'FFF62 16-bit timer (all channels) 7 6 5 4 3 2 1 0 -- MDF FDIR -- -- PWM2 PWM1 PWM0 Initial value 1 0 0 1 1 0 0 0 Read/Write -- R/W R/W -- -- R/W R/W R/W Bit PWM mode 0 0 Channel 0 operates normally (Initial value) 1 Channel 0 operates in PWM mode PWM mode 1 0 Channel 1 operates normally (Initial value) 1 Channel 1 operates in PWM mode PWM mode 2 0 Channel 2 operates normally (Initial value) 1 Channel 2 operates in PWM mode Flag direction 0 1 OVF is set to 1 in TISRC when 16TCNT2 overflows or underflows (Initial value) OVF is set to 1 in TISRC when 16TCNT2 overflows Phase counting mode 0 Channel 2 operates normally (Initial value) 1 Channel 2 operates in phase counting mode 539 TOLR--Timer Output Level Setting Register H'FFF63 16-bit timer (all channels) 7 6 5 4 3 2 1 0 -- -- TOB2 TOA2 TOB1 TOA1 TOB0 TOA0 Initial value 1 1 0 0 0 0 0 0 Read/Write -- -- W W W W W W Bit Output level setting A0 0 TIOCA0 is 0 1 TIOCA0 is 1 (Initial value) Output level setting B0 0 TIOCB0 is 0 1 TIOCB0 is 1 (Initial value) Output level setting A1 0 TIOCA1 is 0 1 TIOCA1 is 1 (Initial value) Output level setting B1 0 TIOCB1 is 0 1 TIOCB1 is 1 (Initial value) Output level setting A2 0 TIOCA2 is 0 1 TIOCA2 is 1 (Initial value) Output level setting B2 540 0 TIOCB2 is 0 1 TIOCB2 is 1 (Initial value) TISRA--Timer Interrupt Status Register A 7 Bit: -- 6 H'FFF64 5 4 IMIEA2 IMIEA1 IMIEA0 3 -- Initial value: 1 0 0 0 1 Read/Write: -- R/W R/W R/W -- 16-bit timer (all channels) 2 1 0 IMFA2 IMFA1 IMFA0 0 0 0 R/(W)* R/(W)* R/(W)* Input capture/compare match flag A0 0 [Clearing conditions] (Initial value) Read IMFA0 when IMFA0=1, then write 0 in IMFA0 [Setting conditions] * 16TCNT0=GRA0 when GRA0 functions as an output compare register. 1 * 16TCNT0 value is transferred to GRA0 by an input capture signal when GRA0 functions as an input capture register. Input capture/compare match flag A1 0 (Initial value) [Clearing conditions] Read IMFA1 when IMFA1=1, then write 0 in IMFA1 [Setting conditions] * 16TCNT1=GRA1 when GRA1 functions as an output compare register. 1 * 16TCNT1 value is transferred to GRA1 by an input capture signal when GRA1 functions as an input capture register. Input capture/compare match flag A2 0 [Clearing conditions] (Initial value) Read IMFA2 when IMFA2=1, then write 0 in IMFA2 [Setting conditions] * 16TCNT2=GRA2 when GRA2 functions as an output compare register. 1 * 16TCNT2 value is transferred to GRA2 by an input capture signal when GRA2 functions as an input capture register. Input capture/compare match interrupt enable A0 0 IMIA0 interrupt requested by IMFA0 flag is disabled 1 Input capture/compare match interrupt enable A1 0 IMIA1 interrupt requested by IMFA1 flag is disabled 1 (Initial value) IMIA1 interrupt requested by IMFA1 is enabled Input capture/compare match interrupt enable A2 0 IMIA2 interrupt requested by IMFA2 flag is disabled 1 (Initial value) IMIA0 interrupt requested by IMFA0 is enabled (Initial value) IMIA2 interrupt requested by IMFA2 is enabled Note: * Only 0 can be written to clear the flag. 541 TISRB--Timer Interrupt Status Register B 7 Bit: -- 6 H'FFF65 5 4 IMIEB2 IMIEB1 IMIEB0 3 -- Initial value: 1 0 0 0 1 Read/Write: -- R/W R/W R/W -- 2 16-bit timer (all channels) 1 0 IMFB2 IMFB1 IMFB0 0 0 0 R/(W)* R/(W)* R/(W)* Input capture/compare match flag B0 0 [Clearing condition] Read IMFB0 when IMFB0=1, then write 0 in IMFB0. 1 [Setting conditions] 16TCNT0=GRB0 when GRB0 functions as an output compare register. 16TCNT0 value is transferred to GRB0 by an input capture signal when GRB0 functions as an input capture register. (Initial value) Input capture/compare match flag B1 0 [Clearing condition] Read IMFB1 when IMFB1=1, then write 0 in IMFB1. 1 [Setting conditions] * 16TCNT1=GRB1 when GRB1 functions as an output compare register. * 16TCNT1 value is transferred to GRB1 by an input capture signal when GRB1 functions as an input capture register. (Initial value) Input capture/compare match flag B2 0 [Clearing condition] Read IMFB2 when IMFB2=1, then write 0 in IMFB2. (Initial value) 1 [Setting conditions] * 16TCNT2=GRB2 when GRB2 functions as an output compare register. * 16TCNT2 value is transferred to GRB2 by an input capture signal when GRB2 functions as an input capture register. Input capture/compare match interrupt enable B0 0 IMIB0 interrupt requested by IMFB0 flag is disabled 1 IMIB0 interrupt requested by IMFB0 is enabled (Initial value) Input capture/compare match interrupt enable B1 0 IMIB1 interrupt requested by IMFB1 flag is disabled 1 IMIB1 interrupt requested by IMFB1 is enabled (Initial value) Input capture/compare match interrupt enable B2 0 IMIB2 interrupt requested by IMFB2 flag is disabled 1 IMIB2 interrupt requested by IMFB2 is enabled Note : * Only 0 can be written to clear the flag. 542 (Initial value) TISRC--Timer Interrupt Status Register C Bit: 7 -- 6 5 H'FFF66 4 OVIE2 OVIE1 OVIE0 3 -- Initial value: 1 0 0 0 1 Read/Write: -- R/W R/W R/W -- 16-bit timer (all channels) 2 1 0 OVF2 OVF1 OVF0 0 0 0 R/(W)* R/(W)* R/(W)* Overflow flag 0 0 [Clearing condition] Read OVF0 when OVF0 = 1, then write 0 in OVF0. 1 [Setting condition] 16TCNT0 overflowed from H'FFFF to H'0000. (Initial value) Overflow flag 1 0 1 (Initial value) [Clearing condition] Read OVF1 when OVF1 = 1, then write 0 in OVF1. [Setting condition] 16TCNT1 overflowed from H'FFFF to H'0000. Overflow flag 2 0 [Clearing condition] Read OVF2 when OVF2 = 1, then write 0 in OVF2. 1 [Setting condition] 16TCNT2 overflowed from H'FFFF to H'0000, or underflowed from H'0000 to H'FFFF. Overflow interrupt enable 0 OVI0 interrupt requested by OVF0 flag is disabled 0 1 (Initial value) OVI1 interrupt requested by OVF1 flag is enabled Overflow interrupt enable 2 OVI2 interrupt requested by OVF2 flag is disabled 0 1 (Initial value) OVI0 interrupt requested by OVF0 flag is enabled Overflow interrupt enable 1 OVI1 interrupt requested by OVF1 flag is disabled 0 1 (Initial value) (Initial value) OVI2 interrupt requested by OVF2 flag is enabled Note : * Only 0 can be written to clear the flag. 543 16TCR0--Timer Control Register 0 Bit Initial value Read/Write H'FFF68 16-bit timer channel 0 7 -- 6 5 4 3 2 1 0 CCLR1 CCLR0 CKEG1 CKEG0 TPSC2 TPSC1 TPSC0 1 -- 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Timer prescaler 2 to 0 Bit 1 Bit 0 Bit 2 TPSC2 TPSC1 0 0 1 0 1 1 Description TPSC0 0 1 0 1 0 1 0 1 Internal clock : o Internal clock : o / 2 Internal clock : o / 4 Internal clock : o / 8 External clock A : TCLKA input External clock B : TCLKB input External clock C : TCLKC input External clock D : TCLKD input Clock edge 1 and 0 Bit 4 Bit 3 CKEG CKEG0 0 0 1 0 1 -- Counter clear 1 and 0 Bit 5 Bit 6 CCLR1 0 1 CCLR0 0 1 0 1 544 Description Rising edges counted Falling edges counted Both edges counted (Initial value) Description (Initial value) 16TCNT is not cleared 16TCNT is cleared by GRA compare match or input capture 16TCNT is cleared by GRB compare match or input capture Synchronous clear : 16TCNT is cleared in synchronization with other synchronized timers (Initial value) TIOR0--Timer I/O Control Register 0 Bit: H'FFF69 16-bit timer channel 0 7 6 5 4 3 2 1 0 IOA0 -- IOB2 IOB1 IOB0 -- IOA2 IOA1 Initial value: 1 0 0 0 1 0 0 0 Read/Write: -- R/W R/W R/W -- R/W R/W R/W I / O control A2 to A0 Bit 2 Bit 1 Bit 0 IOA2 IOA1 Description IOA0 0 1 0 0 0 1 GRA is an output compare register No output at compare match (Initial value) 0 output at GRA compare match 1 output at GRA compare match Output toggles at GRA compare match (1 output on channel 2) GRA is an input capture register GRA captures rising edges of input GRA captures falling edges of input GRB captures both edges of input 1 0 1 0 1 0 1 1 I / O control B2 to B0 Bit 6 Bit 5 Bit 4 IOB2 IOB1 0 0 1 0 1 1 Description IOB0 0 1 0 GRB is an output compare register No output at compare match (Initial value) 0 output at GRB compare match 1 output at GRB compare match Output toggles at GRB compare match (1 output on channel 2) GRB is an input capture register GRB captures rising edges of input GRB captures falling edges of input GRB captures both edges of input 1 0 1 0 1 545 16TCNT0 H/L--Timer Counter 0 H/L Bit Initial value Read/Write 15 14 13 12 11 H'FFF6A, H'FFF6B 10 9 8 7 6 5 16-bit timer channel 0 4 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Up-counter GRA0 H/L--General Register A0 H/L Bit Initial value Read/Write 15 14 13 12 11 H'FFF6C, H'FFF6D 10 9 8 7 6 5 16-bit timer channel 0 4 3 2 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Output compare or input capture register GRB0 H/L--General Register B0 H/L Bit Initial value Read/Write 15 14 13 12 11 H'FFF6E, H'FFF6F 10 9 8 7 6 5 16-bit timer channel 0 4 2 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Output compare or input capture register 546 3 16TCR1 Timer Control Register 1 7 Bit 6 -- H'FFF70 5 4 16-bit timer channel 1 3 2 1 0 CCLR1 CCLR0 CKEG1 CKEG0 TPSC2 TPSC1 TPSC0 Initial value 1 0 0 0 0 0 0 0 Read/Write -- R/W R/W R/W R/W R/W R/W R/W Note: Bit functions are the same as for 16-bit timer channel 0. TIOR1--Timer I/O Control Register 1 H'FFF71 16-bit timer channel 1 7 6 5 4 3 2 1 0 -- IOB2 IOB1 IOB0 -- IOA2 IOA1 IOA0 Initial value 1 0 0 0 1 0 0 0 Read/Write -- R/W R/W R/W -- R/W R/W R/W Bit Note: Bit functions are the same as for 16-bit timer channel 0. 16TCNT1 H/L--Timer Counter 1 H/L Bit Initial value Read/Write 15 14 13 12 11 H'FFF72, H'FFF73 10 9 8 7 6 5 16-bit timer channel 1 4 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Note: Bit functions are the same as for 16-bit timer channel 0. 547 GRA1 H/L--General Register A1 H/L Bit Initial value Read/Write 15 14 13 12 11 H'FFF74, H'FFF75 10 9 8 7 6 5 16-bit timer channel 1 4 3 2 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Note: Bit functions are the same as for 16-bit timer channel 0. GRB1 H/L--General Register B1 H/L Bit Initial value Read/Write 15 14 13 12 11 H'FFF76, H'FFF77 10 9 8 7 6 5 16-bit timer channel 1 4 3 2 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Note: Bit functions are the same as for 16-bit timer channel 0. 16TCR2 Timer Control Register 2 Bit 7 -- 6 H'FFF78 5 4 3 16-bit timer channel 2 2 1 0 CCLR1 CCLR0 CKEG1 CKEG0 TPSC2 TPSC1 TPSC0 Initial value 1 0 0 0 0 0 0 0 Read/Write -- R/W R/W R/W R/W R/W R/W R/W Notes: 1. Bit functions are the same as for 16-bit timer channel 0. 2. When phase counting mode is selected in channel 2, the settings of bits CKEG1 and CKEG0 and TPSC2 to TPSC0 in 16TCR2 are ignored. 548 TIOR2--Timer I/O Control Register 2 H'FFF79 16-bit timer channel 2 7 6 5 4 3 2 1 0 -- IOB2 IOB1 IOB0 -- IOA2 IOA1 IOA0 Initial value 1 0 0 0 1 0 0 0 Read/Write -- R/W R/W R/W -- R/W R/W R/W Bit Note: Bit functions are the same as for 16-bit timer channel 0. 16TCNT2 H/L--Timer Counter 2 H/L Bit Initial value Read/Write 15 14 13 12 11 H'FFF7A, H'FFF7B 10 9 8 7 6 5 16-bit timer channel 2 4 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Phase counting mode : up/down-counter Other mode : up-counter GRA2 H/L--General Register A2 H/L Bit Initial value Read/Write 15 1 H'FFF7C, H'FFF7D 16-bit timer channel 2 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Note: Bit functions are the same as for 16-bit timer channel 0. 549 GRB2 H/L--General Register B2 H/L Bit Initial value Read/Write 15 14 13 12 11 H'FFF7E, H'FFF7F 10 9 8 7 5 4 3 2 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W Note: Bit functions are the same as for 16-bit timer channel 0. 550 6 16-bit timer channel 2 8TCR0--Timer Control Register 0 8TCR1--Timer Control Register 1 Bit Initial value Read/Write H'FFF80 H'FFF81 8-bit timer channel 0 8-bit timer channel 1 7 6 5 4 3 2 1 0 CMIEB CMIEA OVIE CCLR1 CCLR0 CKS2 CKS1 CKS0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Clock select 2 to 0 0 0 0 Clock input is disabled 1 Internal clock: counted on rising edge of /8 0 Internal clock: counted on rising edge of /64 1 Internal clock: counted on rising edge of /8192 0 Channel 0: Count on 8TCNT1 overflow signal* Channel 1: Count on 8TCNT0 compare match A* 1 External clock: counted on falling edge 1 0 1 0 External clock: counted on rising edge 1 External clock: counted on both rising and falling edges 1 Note: * If the clock input of channel 0 is the 8TCNT1 overflow signal and that of channel 1 is the 8TCNT0 compare match signal, no incrementing clock is generated. Do not use this setting. Counter clear 1 and 0 0 1 0 Clearing is disabled 1 Cleared by compare match A 0 Cleared by compare match B/input capture B 1 Cleared by input capture B Timer overflow interrupt enable 0 OVI interrupt requested by OVF is disabled 1 OVI interrupt requested by OVF is enabled Compare match interrupt enable A 0 CMIA interrupt requested by CMFA is disabled 1 CMIA interrupt requested by CMFA is enabled Compare match interrupt enable B 0 CMIB interrupt requested by CMFB is disabled 1 CMIB interrupt requested by CMFB is enabled 551 8TCSR0--Timer Control/Status Register 0 Bit Initial value Read/Write H'FFF82 8-bit timer channel 0 7 6 5 4 3 2 1 0 CMFB CMFA OVF ADTE OIS3 OIS2 OS1 OS0 0 R/(W)*1 0 R/(W)*1 0 R/(W)*1 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Output select A1 and A0 Bit 1 Bit 0 Description OS1 0 OS0 0 No change at compare match A 1 0 output at compare match A 0 1 output at compare match A 1 Output toggles at compare match A 1 Output/input capture edge select B3 and B2 ICE in Bit 3 8TCSR1 OIS3 0 0 Bit 2 0 No change at compare match B 1 0 output at compare match B 0 1 output at compare match B 1 1 0 0 1 1 1 Description OIS2 0 1 Output toggles at compare match B TCORB input capture on rising edge TCORB input capture on falling edge TCORB input capture on both rising and falling edges A/D trigger enable Bit 4 TRGE*2 ADTE 0 0 1 0 1 1 Description A/D converter start requests by compare match A or an external trigger are disabled A/D converter start requests by compare match A or an external trigger are disabled A/D converter start requests by an external trigger are enabled, and A/D converter start requests by compare match A are disabled A/D converter start requests by compare match A are enabled, and A/D converter start requests by an external trigger are disabled Note: *2 TRGE is bit 7 of the A/D control register (ADCR). Timer overflow flag 0 [Clearing condition] Read OVF when OVF = 1, then write 0 in OVF. 1 [Setting condition] 8TCNT overflows from H'FF to H'00. Compare match flag A 0 [Clearing condition] Read CMFA when CMFA = 1, then write 0 in CMFA. 1 [Setting condition] 8TCNT = TCORA Compare match/input capture flag B 0 [Clearing condition] Read CMFB when CMFB = 1, then write 0 in CMFB. 1 [Setting conditions] 8TCNT = TCORB * The 8TCNT value is transferred to TCORB by an input capture signal when * TCORB functions as an input capture register. Note: *1 Only 0 can be written to bits 7 to 5 to clear these flags. 552 8TCSR1--Timer Control/Status Register 1 Bit Initial value Read/Write H'FFF83 8-bit timer channel 1 7 6 5 4 3 2 1 0 CMFB CMFA OVF ICE OIS3 OIS2 OS1 OS0 0 R/(W)* 0 R/(W)* 0 R/(W)* 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Output select A1 and A0 Bit 1 Bit 0 Description OS1 0 OS0 0 No change at compare match A 1 0 output at compare match A 0 1 output at compare match A 1 1 Output toggles at compare match A Output/input capture edge select B3 and B2 ICE in Bit 3 8TCSR1 OIS3 0 0 Bit 2 0 No change at compare match B 1 0 output at compare match B 0 1 output at compare match B 1 Output toggles at compare match B 1 0 0 1 1 1 Description OIS2 0 1 TCORB input capture on rising edge TCORB input capture on falling edge TCORB input capture on both rising and falling edges Input capture enable 0 TCORB is a compare match register 1 TCORB is an input capture register Timer overflow flag 0 [Clearing condition] Read OVF when OVF = 1, then write 0 in OVF. 1 [Setting condition] 8TCNT overflows from H'FF to H'00. Compare match/input capture flag A 0 [Clearing condition] Read CMFA when CMFA = 1, then write 0 in CMFA. 1 [Setting condition] 8TCNT = TCORA Compare match/input capture flag B 0 [Clearing condition] Read CMFB when CMFB = 1, then write 0 in CMFB. 1 [Setting conditions] 8TCNT = TCORB * The 8TCNT value is transferred to TCORB by an input capture signal when * TCORB functions as an input capture register. Note: * Only 0 can be written to bits 7 to 5 to clear these flags. 553 TCORA0--Time Constant Register A0 TCORA1--Time Constant Register A1 H'FFF84 H'FFF85 8-bit timer channel 0 8-bit timer channel 1 TCORA0 Bit Initial value Read/Write 15 14 13 12 11 TCORA1 10 9 8 7 6 5 H'FFF86 H'FFF87 15 14 13 12 11 10 9 8 7 6 5 Read/Write 554 0 4 3 2 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W H'FFF88 H'FFF89 8-bit timer channel 0 8-bit timer channel 1 8TCNT0 Initial value 1 TCORB1 8TCNT0--Timer Counter 0 8TCNT1--Timer Counter 1 Bit 2 8-bit timer channel 0 8-bit timer channel 1 TCORB0 Initial value Read/Write 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W TCORB0--Time Constant Register B0 TCORB1--Time Constant Register B1 Bit 4 15 0 8TCNT1 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W TCSR--Timer Control/Status Register 7 6 5 OVF WT/IT TME 0 R/(W)* 0 R/W 0 R/W Bit Initial value Read/Write H'FFF8C 4 1 3 1 WDT 2 1 0 CKS2 CKS1 CKS0 0 R/W 0 R/W 0 R/W Clock select 2 to 0 CKS2 CKS1 CKS0 0 0 1 0 1 1 Description 0 /2 1 /32 0 /64 1 /128 0 /256 1 /512 0 /2048 1 /4096 Timer enable 0 Timer disabled: TCNT is initialized to H'00 and halted Timer enabled: 1 TCNT starts counting up Timer mode select 0 Interval timer: requests interval timer interrupts 1 Watchdog timer: generates a reset signal Overflow flag 0 1 [Clearing condition] Read OVF when OVF = 1, then write 0 in OVF [Setting condition] TCNT changes from H'FF to H'00 Note: * Only 0 can be written to clear the flag. 555 TCNT--Timer Counter Bit Initial value Read/Write H'FFF8D (read), H'FFF8C (write) WDT 7 6 5 4 3 2 1 0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Count value RSTCSR--Reset Control/Status Register Bit Initial value Read/Write 7 6 WRST RSTOE 0 R/(W)* 0 R/W H'FFF8F (read), H'FFF8E (write) 5 4 3 2 1 0 1 1 1 1 1 1 Reset output enable 0 External output of reset signal is disabled 1 External output of reset signal is enabled Watchdog timer reset 0 [Clearing conditions] * Reset signal at RES pin * Read WRST when WRST = 1, then write 0 in WRST [Setting condition] 1 TCNT overflow generates a reset signal during watchdog timer operation Note: * Only 0 can be written in bit 7 to clear the flag. 556 WDT 8TCR2--Timer Control Register 2 8TCR3--Timer Control Register 3 Bit Initial value Read/Write H'FFF90 H'FFF91 8-bit timer channel 2 8-bit timer channel 3 7 6 5 4 3 2 1 0 CMIEB CMIEA OVIE CCLR1 CCLR0 CKS2 CKS1 CKS0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Clock select 2 to 0 CSK2 CSK1 CSK0 Clock input is disabled 1 Internal clock: counted on rising edge of /8 0 Internal clock: counted on rising edge of /64 1 Internal clock: counted on rising edge of /8192 0 Channel 2: Count on 8TCNT3 overflow signal* Channel 3: Count on 8TCNT2 compare match A* 1 External clock: counted on falling edge 0 External clock: counted on rising edge 1 External clock: counted on both rising and falling edges 0 0 1 0 1 Description 0 1 Note: * If the clock input of channel 2 is the 8TCNT3 overflow signal and that of channel 3 is the 8TCNT2 compare match signal, no incrementing clock is generated. Do not use this setting. Counter clear 1 and 0 0 1 0 Clearing is disabled 1 Cleared by compare match A 0 Cleared by compare match B/input capture B 1 Cleared by input capture B Timer overflow interrupt enable 0 OVI interrupt requested by OVF is disabled 1 OVI interrupt requested by OVF is enabled Compare match interrupt enable A 0 CMIA interrupt requested by CMFA is disabled 1 CMIA interrupt requested by CMFA is enabled Compare match interrupt enable B 0 CMIB interrupt requested by CMFB is disabled 1 CMIB interrupt requested by CMFB is enabled 557 8TCSR2--Timer Control/Status Register 2 8TCSR3--Timer Control/Status Register 3 8TCSR2 Bit Initial value Read/Write 8TCSR3 Bit Initial value Read/Write 7 6 5 CMFB CMFA OVF 0 R/(W)* 0 R/(W)* 0 R/(W)* H'FFF92 H'FFF93 4 1 -- 8-bit timer channel 2 8-bit timer channel 3 3 2 1 0 OIS3 OIS2 OS1 OS0 0 R/W 0 R/W 0 R/W 0 R/W 7 6 5 4 3 2 1 0 CMFB CMFA OVF ICE OIS3 OIS2 OS1 OS0 0 R/(W)* 0 R/(W)* 0 R/(W)* 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Output select A1 and A0 Bit 1 Bit 0 Description OS1 0 OS0 0 No change at compare match A 1 0 output at compare match A 0 1 output at compare match A 1 Output toggles at compare match A 1 Output/input capture edge select B3 and B2 ICE in Bit 3 8TCSR3 OIS3 0 0 Bit 3 0 No change at compare match B 1 0 output at compare match B 0 1 output at compare match B 1 1 0 0 1 1 Description OIS2 Output toggles at compare match B TCORB input capture on rising edge 1 TCORB input capture on falling edge 0 TCORB input capture on both rising and falling edges Input capture enable 0 TCORB is a compare match register 1 TCORB is an input capture register Timer overflow flag 0 [Clearing condition] Read OVF when OVF = 1, then write 0 in OVF. 1 [Setting condition] 8TCNT overflows from H'FF to H'00. Compare match/input capture flag A 0 1 [Clearing condition] Read CMFA when CMFA = 1, then write 0 in CMFA. [Setting condition] 8TCNT = TCORA Compare match/input capture flag B 0 [Clearing condition] Read CMFB when CMFB = 1, then write 0 in CMFB. 1 [Setting conditions] * 8TCNT = TCORB * The 8TCNT value is transferred to TCORB by an input capture signal when TCORB functions as an input capture register. Note: * Only 0 can be written to bits 7 to 5 to clear these flags. 558 TCORA2--Time Constant Register A2 TCORA3--Time Constant Register A3 H'FFF94 H'FFF95 8-bit timer channel 2 8-bit timer channel 3 TCORA2 Bit Initial value Read/Write 15 14 13 12 11 TCORA3 10 9 8 7 6 5 H'FFF96 H'FFF97 15 14 13 12 11 10 9 8 7 6 5 Read/Write 0 4 3 2 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W H'FFF98 H'FFF99 8TCNT2 Initial value 1 TCORB3 8TCNT2--Timer Counter 2 8TCNT3--Timer Counter 3 Bit 2 8-bit timer channel 2 8-bit timer channel 3 TCORB2 Initial value Read/Write 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W TCORB2--Time Constant Register B2 TCORB3--Time Constant Register B3 Bit 4 15 14 13 12 11 8-bit timer channel 2 8-bit timer channel 3 8TCNT3 10 9 8 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W 559 DADR0--D/A Data Register 0 Bit Initial value Read/Write H'FFF9C D/A 7 6 5 4 3 2 1 0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W D/A conversion data DADR1--D/A Data Register 1 Bit Initial value Read/Write H'FFF9D 7 6 5 4 3 2 1 0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W D/A conversion data 560 D/A DACR--D/A Control Register 7 6 5 DAOE1 DAOE0 DAE 0 R/W 0 R/W 0 R/W Bit Initial value Read/Write H'FFF9E D/A 4 3 2 1 0 1 1 1 1 1 D/A enable Bit 7 Bit 6 Bit 5 DAOE1 DAOE0 DAE 0 0 Description D/A conversion is disabled in channels 0 and 1 D/A conversion is enabled in channel 0 0 1 0 D/A conversion is disabled in channel 1 0 1 1 0 1 0 D/A conversion is enabled in channels 0 and 1 D/A conversion is disabled in channel 0 D/A conversion is enabled in channel 1 1 0 1 1 1 D/A conversion is enabled in channels 0 and 1 D/A conversion is enabled in channels 0 and 1 D/A output enable 0 0 DA0 analog output is disabled 1 Channel-0 D/A conversion and DA0 analog output are enabled D/A output enable 1 0 DA1 analog output is disabled 1 Channel-1 D/A conversion and DA1 analog output are enabled 561 TPMR--TPC Output Mode Register Bit 7 6 5 4 Initial value Read/Write 1 1 1 1 H'FFFA0 3 2 1 0 G3NOV G2NOV G1NOV G0NOV 0 R/W 0 R/W 0 R/W 0 R/W TPC Group 0 non-overlap 0 Normal TPC output in group 0. Output values change at compare match A in the selected 16-bit timer channel 1 Non-overlapping TPC output in group 0, controlled by compare match A and B in the selected 16-bit timer channel Group 1 non-overlap 0 Normal TPC output in group 1. Output values change at compare match A in the selected 16-bit timer channel 1 Non-overlapping TPC output in group 1, controlled by compare match A and B in the selected 16-bit timer channel Group 2 non-overlap 0 Normal TPC output in group 2. Output values change at compare match A in the selected 16-bit timer channel 1 Non-overlapping TPC output in group 2, controlled by compare match A and B in the selected 16-bit timer channel Group 3 non-overlap 562 0 Normal TPC output in group 3. Output values change at compare match A in the selected 16-bit timer channel 1 Non-overlapping TPC output in group 3, controlled by compare match A and B in the selected 16-bit timer channel TPCR--TPC Output Control Register Bit Initial value Read/Write H'FFFA1 7 6 5 4 3 2 1 0 G3CMS1 G3CMS0 G2CMS1 G2CMS0 G1CMS1 G1CMS0 G0CMS1 G0CMS0 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W TPC Group 0 compare match select 1 and 0 Bit 1 Bit 0 16-Bit Timer Channel Selected as Output Trigger G0CMS1 G0CMS0 0 0 1 1 TPC output group 0 (TP3 to TP0) is triggered by compare match in 16-bit timer channel 0 TPC output group 0 (TP3 to TP0) is triggered by compare match in 16-bit timer channel 1 0 TPC output group 0 (TP3 to TP0) is triggered by 1 compare match in 16-bit timer channel 2 Group 1 compare match select 1 and 0 Bit 3 Bit 2 G1CMS1 G1CMS0 0 0 1 1 16-Bit Timer Channel Selected as Output Trigger TPC output group 1 (TP7 to TP4) is triggered by compare match in 16-bit timer channel 0 TPC output group 1 (TP7 to TP4) is triggered by compare match in 16-bit timer channel 1 0 TPC output group 1 (TP7 to TP4) is triggered by 1 compare match in 16-bit timer channel 2 Group 2 compare match select 1 and 0 Bit 5 Bit 4 16-Bit Timer Channel Selected as Output Trigger G2CMS1 G2CMS0 0 1 0 1 0 1 TPC output group 2 (TP11 to TP8) is triggered by compare match in 16-bit timer channel 0 TPC output group 2 (TP11 to TP8) is triggered by compare match in 16-bit timer channel 1 TPC output group 2 (TP11 to TP8) is triggered by compare match in 16-bit timer channel 2 Group 3 compare match select 1 and 0 Bit 7 Bit 6 G3CMS1 G3CMS0 0 1 0 1 0 1 16-Bit Timer Channel Selected as Output Trigger TPC output group 3 (TP15 to TP12) is triggered by compare match in 16-bit timer channel 0 TPC output group 3 (TP15 to TP12) is triggered by compare match in 16-bit timer channel 1 TPC output group 3 (TP15 to TP12) is triggered by compare match in 16-bit timer channel 2 563 NDERB--Next Data Enable Register B Bit Initial value Read/Write H'FFFA2 TPC 7 6 5 4 3 2 1 0 NDER15 NDER14 NDER13 NDER12 NDER11 NDER10 NDER9 NDER8 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Next data enable 15 to 8 Bits 7 to 0 Description NDER15 to NDER8 TPC outputs TP15 to TP8 are disabled (NDR15 to NDR8 are not transferred to PB7 to PB0) 0 TPC outputs TP15 to TP8 are enabled 1 (NDR15 to NDR8 are transferred to PB7 to PB0) NDERA--Next Data Enable Register A Bit Initial value Read/Write H'FFFA3 TPC 7 6 5 4 3 2 1 0 NDER7 NDER6 NDER5 NDER4 NDER3 NDER2 NDER1 NDER0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Next data enable 7 to 0 Bits 7 to 0 NDER7 to NDER0 564 Description 0 TPC outputs TP7 to TP0 are disabled (NDR7 to NDR0 are not transferred to PA7 to PA0) 1 TPC outputs TP7 to TP0 are enabled (NDR7 to NDR0 are transferred to PA7 to PA0) NDRB--Next Data Register B * H'FFFA4/H'FFFA6 TPC Same trigger for TPC output groups 2 and 3 Address H'FFFA4 Bit Initial value Read/Write 7 6 5 4 3 2 1 0 NDR15 NDR14 NDR13 NDR12 NDR11 NDR10 NDR9 NDR8 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Store the next output data for TPC output group 3 Store the next output data for TPC output group 2 Address H'FFFA6 * Bit 7 6 5 4 3 2 1 0 Initial value Read/Write 1 1 1 1 1 1 1 1 3 2 1 0 1 1 1 1 Different triggers for TPC output groups 2 and 3 Address H'FFFA4 7 6 5 4 NDR15 NDR14 NDR13 NDR12 0 R/W 0 R/W 0 R/W 0 R/W Bit Initial value Read/Write Store the next output data for TPC output group 3 Address H'FFFA6 Bit Initial value Read/Write 7 1 6 1 5 1 4 1 3 2 1 0 NDR11 NDR10 NDR9 NDR8 0 R/W 0 R/W 0 R/W 0 R/W Store the next output data for TPC output group 2 565 NDRA--Next Data Register A * H'FFFA5/H'FFFA7 TPC Same trigger for TPC output groups 0 and 1 Address H'FFFA5 Bit Initial value Read/Write 7 6 5 4 3 2 1 0 NDR7 NDR6 NDR5 NDR4 NDR3 NDR2 NDR1 NDR0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Store the next output data for TPC output group 1 Store the next output data for TPC output group 0 Address H'FFFA7 * Bit 7 6 5 4 3 2 1 0 Initial value Read/Write 1 1 1 1 1 1 1 1 3 2 1 0 1 1 1 1 Different triggers for TPC output groups 0 and 1 Address H'FFFA5 Bit Initial value Read/Write 7 6 5 4 NDR7 NDR6 NDR5 NDR4 0 R/W 0 R/W 0 R/W 0 R/W Store the next output data for TPC output group 1 Address H'FFFA7 Bit 7 6 5 4 Initial value Read/Write 1 1 1 1 3 2 1 0 NDR3 NDR2 NDR1 NDR0 0 R/W 0 R/W 0 R/W 0 R/W Store the next output data for TPC output group 0 566 SMR--Serial Mode Register SCI0 7 6 5 4 3 2 1 0 C/A CHR PE O/E STOP MP CKS1 CKS0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Bit Initial value Read/Write H'FFFB0 Clock select 1 and 0 Bit 1 Bit 0 CKS1 CKS0 0 1 Clock Source 0 clock 1 /4 clock 0 /16 clock 1 /64 clock Multiprocessor mode 0 1 Multiprocessor function disabled Multiprocessor format selected Stop bit length 0 One stop bit 1 Two stop bits Parity mode 0 Even parity 1 Odd parity Parity enable 0 Parity bit is not added or checked 1 Parity bit is added and checked Character length 0 8-bit data 1 7-bit data Communication mode (for serial communication interface) 0 Asynchronous mode 1 Synchronous mode GSM mode (for smart card interface) 0 TEND flag is set 12.5 etu* after start bit 1 TEND flag is set 11.0 etu* after start bit Note: * etu: Elementary time unit (time required to transmit one bit) 567 BRR--Bit Rate Register Bit Initial value Read/Write H'FFFB1 7 6 5 4 3 2 1 0 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W Serial communication bit rate setting 568 SCI0 SCR--Serial Control Register Bit Initial value Read/Write H'FFFB2 7 6 5 4 3 2 1 0 TIE RIE TE RE MPIE TEIE CKE1 CKE0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Clock enable 1 and 0 (for serial communication interface) Bit 1 Bit 0 Description CKE1 CKE0 Internal clock: SCK pin Asynchronous mode available for generic I/O 0 Internal clock: SCK pin Synchronous mode used for serial clock output 0 Internal clock: SCK pin Asynchronous mode used for clock output 1 Internal clock: SCK pin Synchronous mode used for serial clock output External clock: SCK pin Asynchronous mode used for clock input 0 External clock: SCK pin Synchronous mode used for serial clock input 1 External clock: SCK pin Asynchronous mode used for clock input 1 External clock: SCK pin Synchronous mode used for serial clock input Receive enable 0 Receiving is disabled 1 Receiving is enabled Transmit enable 0 1 SCI0 Transmitting is disabled Transmitting is enabled Clock enable 1 and 0 (for smart card interface) SMR Bit 1 Bit 0 Description GM CKE1 CKE0 SCK pin available for generic I/O 0 0 0 SCK pin used for clock output 1 SCK pin output fixed low 0 0 SCK pin used for clock output 1 1 SCK pin output fixed high 0 1 SCK pin used for clock output 1 Transmit-end interrupt enable 0 1 Transmit-end interrupt requests (TEI) are disabled Transmit-end interrupt requests (TEI) are enabled Multiprocessor interrupt enable 0 1 Multiprocessor interrupts are disabled (normal receive operation) Multiprocessor interrupts are enabled Receive interrupt enable 0 1 Receive-data-full (RXI) and receive-error (ERI) interrupt requests are disabled Receive-data-full (RXI) and receive-error (ERI) interrupt requests are enabled Transmit interrupt enable 0 1 Transmit-data-empty interrupt request (TXI) is disabled Transmit-data-empty interrupt request (TXI) is enabled 569 TDR--Transmit Data Register Bit Initial value Read/Write H'FFFB3 7 6 5 4 3 2 1 0 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W Serial transmit data 570 SCI0 SSR--Serial Status Register 7 6 5 4 3 2 1 0 TDRE RDRF ORER FER/ERS PER TEND MPB MPBT 1 R/(W)* 0 R/(W)* 0 R/(W)* 0 R/(W)* 0 R/(W)* 1 R 0 R 0 R/W Bit Initial value Read/Write H'FFFB4 SCI0 Multiprocessor bit transfer 0 Multiprocessor bit value in transmit data is 0 1 Multiprocessor bit value in transmit data is 1 Multiprocessor bit 0 1 Multiprocessor bit value in receive data is 0 Multiprocessor bit value in receive data is 1 Transmit end (for serial communication interface) 0 [Clearing conditions] Read TDRE when TDRE = 1, then write 0 in TDRE. 1 [Setting conditions] * Reset or transition to standby mode * TE is cleared to 0 in SCR. * TDRE is 1 when last bit of 1-byte serial character is transmitted. Transmit end (for smart card interface) 0 [Clearing conditions] Read TDRE when TDRE = 1, then write 0 in TDRE. 1 [Setting conditions] * Reset or transition to standby mode * TE is cleared to 0 in SCR and FER/ERS is cleared to 0. * TDRE is 1 and FER/ERS is 0 (normal transmission) 2.5 etu* (when GM = 0) or 1.0 etu (when GM = 1) after 1-byte serial character is transmitted. Note: * etu: Elementary time unit (time required to transmit one bit) Parity error 0 1 [Clearing conditions] * Reset or transition to standby mode * Read PER when PER = 1, then write 0 in PER. [Setting condition] Parity error (parity of receive data does not match parity setting of O/E bit in SMR) Framing error (for serial communication interface) 0 1 [Clearing conditions] * Reset or transition to standby mode * Read FER when FER = 1, then write 0 in FER. [Setting condition] Framing error (stop bit is 0) Error signal status (for smart card interface) 0 1 [Clearing conditions] * Reset or transition to standby mode * Read ERS when ERS = 1, then write 0 in ERS. [Setting condition] A low error signal is received. Overrun error 0 [Clearing conditions] * Reset or transition to standby mode * Read ORER when ORER = 1, then write 0 in ORER. 1 [Setting condition] Overrun error (reception of the next serial data ends when RDRF = 1) Receive data register full 0 [Clearing conditions] * Reset or transition to standby mode * Read RDRF when RDRF = 1, then write 0 in RDRF. 1 [Setting condition] Serial data is received normally and transferred from RSR to RDR. Transmit data register empty 0 [Clearing conditions] * Read TDRE when TDRE = 1, then write 0 in TDRE. [Setting conditions] 1 * Reset or transition to standby mode * TE is 0 in SCR. * Data is transferred from TDR to TSR, enabling new data to be written in TDR Note: * Only 0 can be written, to clear the flag. 571 RDR--Receive Data Register H'FFFB5 SCI0 Bit 7 6 5 4 3 2 1 0 Initial value Read/Write 0 R 0 R 0 R 0 R 0 R 0 R 0 R 0 R Serial receive data 572 SCMR--Smart Card Mode Register Bit Initial value Read/Write 7 1 6 1 5 1 H'FFFB6 4 1 3 2 SDIR SINV 0 R/W 0 R/W SCI0 0 1 SMIF 1 0 R/W Smart card interface mode select 0 Smart card interface function is disabled 1 Smart card interface function is enabled (Initial value) Smart card data invert Unmodified TDR contents are transmitted 0 1 (Initial value) Receive data is stored unmodified in RDR Inverted 1/0 logic levels of TDR contents are transmitted 1/0 logic levels of received data are inverted before storage in RDR Smart card data transfer direction TDR contents are transmitted LSB-first 0 1 (Initial value) Receive data is stored LSB-first in RDR TDR contents are transmitted MSB-first Receive data is stored MSB-first in RDR 573 SMR--Serial Mode Register Bit Initial value Read/Write H'FFFB8 SCI1 7 6 5 4 3 2 1 0 C/A CHR PE O/E STOP MP CKS1 CKS0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Note: Bit functions are the same as for SCI0. BRR--Bit Rate Register Bit Initial value Read/Write H'FFFB9 SCI1 7 6 5 4 3 2 1 0 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W Note: Bit functions are the same as for SCI0. SCR--Serial Control Register Bit Initial value Read/Write H'FFFBA 7 6 5 4 3 2 1 0 TIE RIE TE RE MPIE TEIE CKE1 CKE0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Note: Bit functions are the same as for SCI0. 574 SCI1 TDR--Transmit Data Register Bit Initial value Read/Write H'FFFBB SCI1 7 6 5 4 3 2 1 0 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W 1 R/W Note: Bit functions are the same as for SCI0. SSR--Serial Status Register Bit Initial value Read/Write H'FFFBC SCI1 7 6 5 4 3 2 1 0 TDRE RDRF ORER FER/ERS PER TEND MPB MPBT 0 R/(W)* 0 R/(W)* 0 R/(W)* 0 R/(W)* 0 R/(W)* 1 R 0 R 0 R/W Notes: Bit functions are the same as for SCI0. * Only 0 can be written to clear the flag. RDR--Receive Data Register H'FFFBD SCI1 Bit 7 6 5 4 3 2 1 0 Initial value Read/Write 0 R 0 R 0 R 0 R 0 R 0 R 0 R 0 R Note: Bit functions are the same as for SCI0. 575 SCMR--Smart Card Mode Register Bit Initial value Read/Write 7 1 6 1 Note: Bit functions are the same as for SCI0. 576 H'FFFBE 5 1 4 1 3 2 SDIR SINV 0 R/W 0 R/W SCI1 1 0 SMIF 1 0 R/W P4DR--Port 4 Data Register Bit Initial value Read/Write H'FFFD3 Port 4 7 6 5 4 3 2 1 0 P47 P46 P45 P44 P43 P42 P41 P40 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Data for port 4 pins P6DR--Port 6 Data Register Bit Initial value Read/Write H'FFFD5 Port 6 7 6 5 4 3 2 1 0 P67 P66 P65 P64 P63 P62 P61 P60 1 R 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Data for port 6 pins 577 P7DR--Port 7 Data Register Bit Initial value Read/Write H'FFFD6 Port 7 7 6 5 4 3 2 1 0 P77 P76 P75 P74 P73 P72 P71 P70 * R * R * R * R * R * R * R * R Data for port 7 pins Note: * Determined by pins P77 to P70. P8DR--Port 8 Data Register Bit Initial value Read/Write 7 1 6 1 H'FFFD7 5 1 4 3 2 1 0 P84 P83 P82 P81 P80 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Data for port 8 pins 578 Port 8 P9DR--Port 9 Data Register Bit Initial value Read/Write 7 1 6 1 H'FFFD8 Port 9 5 4 3 2 1 0 P95 P94 P93 P92 P91 P90 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Data for port 9 pins PADR--Port A Data Register Bit Initial value Read/Write H'FFFD9 Port A 7 6 5 4 3 2 1 0 PA7 PA6 PA5 PA4 PA3 PA2 PA1 PA0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Data for port A pins PBDR--Port B Data Register Bit Initial value Read/Write H'FFFDA Port B 7 6 5 4 3 2 1 0 PB7 PB6 PB5 PB4 PB3 PB2 PB1 PB0 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Data for port B pins 579 ADDRA H/L--A/D Data Register A H/L Bit 15 14 13 12 11 H'FFFE0, H'FFFE1 10 9 8 7 6 A/D 5 4 3 2 1 0 0 R 0 R 0 R 0 R 0 R 0 R AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 Initial value Read/Write 0 R 0 R 0 R 0 R 0 R 0 R 0 R 0 R 0 R 0 R ADDRAH ADDRAL A/D conversion data 10-bit data giving an A/D conversion result ADDRB H/L--A/D Data Register B H/L Bit 15 14 13 12 11 H'FFFE2, H'FFFE3 10 9 8 7 6 A/D 5 4 3 2 1 0 0 R 0 R 0 R 0 R 0 R 0 R AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 Initial value Read/Write 0 R 0 R 0 R 0 R 0 R ADDRBH 0 R 0 R 0 R 0 R 0 R ADDRBL A/D conversion data 10-bit data giving an A/D conversion result 580 ADDRC H/L--A/D Data Register C H/L Bit 15 14 12 13 H'FFFE4, H'FFFE5 10 11 8 9 6 7 A/D 5 4 3 2 1 0 0 R 0 R 0 R 0 R 0 R 0 R AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 Initial value Read/Write 0 R 0 R 0 R 0 R 0 R 0 R 0 R 0 R 0 R 0 R ADDRCH ADDRCL A/D conversion data 10-bit data giving an A/D conversion result ADDRD H/L--A/D Data Register D H/L Bit 15 14 12 13 H'FFFE6, H'FFFE7 10 11 8 9 6 7 A/D 5 4 3 2 1 0 0 R 0 R 0 R 0 R 0 R 0 R AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 Initial value Read/Write 0 R 0 R 0 R 0 R 0 R 0 R 0 R 0 R 0 R 0 R ADDRDH ADDRDL A/D conversion data 10-bit data giving an A/D conversion result ADCR--A/D Control Register Bit 7 H'FFFE9 A/D 6 5 4 3 2 1 0 1 1 1 1 1 1 0 R/W TRGE Initial value Read/Write 0 R/W Trigger Enable 0 A/D conversion start by external trigger or 8-bit timer compare match is disabled 1 A/D conversion is started by falling edge of external trigger signal (ADTRG) or 8-bit timer compare match 581 ADCSR--A/D Control/Status Register 7 6 5 4 3 2 1 0 ADF ADIE ADST SCAN CKS CH2 CH1 CH0 0 R/(W)* 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W 0 R/W Bit Initial value Read/Write H'FFFE8 Clock select Conversion time = 134 states (maximum) Conversion time = 1 70 states (maximum) 0 Channel select 2 to 0 CH2 Scan mode Single mode Scan mode Description CH1 CH0 Single Mode Scan Mode 0 AN0 AN0 0 AN1 AN0, AN1 1 0 AN2 AN0 to AN2 1 AN3 AN0 to AN3 1 0 AN4 AN4 0 1 AN5 AN4, AN5 0 AN6 AN4 to AN6 1 1 AN7 AN4 to AN7 Group Selection Channel Selection 0 0 1 A/D 1 A/D start 0 1 A/D conversion is stopped 1. Single mode: A/D conversion starts; ADST is automatically cleared to 0 when conversion ends 2. Scan mode: A/D conversion starts and continues, cycling among the selected channels ADST is cleared to 0 by software, by a reset, or by a transition to standby mode A/D interrupt enable 0 1 A/D end interrupt request is disabled A/D end interrupt request is enabled A/D end flag 0 1 [Clearing condition] Read ADF when ADF = 1, then write 0 in ADF [Setting conditions] * Single mode: A/D conversion ends * Scan mode: A/D conversion ends in all selected channels Note: * Only 0 can be written to clear the flag. 582 Appendix C I/O Port Block Diagrams Port 4 Block Diagram 16-bit bus mode Reset R Q D P4 n PCR C RP4P WP4P Reset Hardware standby R Q Write to external address Internal data bus (lower) 8-bit bus mode Internal data bus (upper) C.1 D P4 n DDR C External bus released WP4D Reset R Q P4n D P4n DR C WP4 RP4 Read external address WP4P: Write to P4PCR RP4P: Read P4PCR WP4D: Write to P4DDR WP4: Write to port 4 RP4: Read port 4 n = 0 to 7 Figure C.1 Port 4 Block Diagram 583 C.2 Port 6 Block Diagrams R Hardware Standby Q D P60 DDR C WP6D Reset Internal data bus Reset Bus controller WAIT input enable R P60 Q D P60 DR C WP6 RP6 Bus controller WP6D: Write to P6DDR WP6: Write to port 6 RP6: Read port 6 Figure C.2 (a) Port 6 Block Diagram (Pin P6 0) 584 WAIT input R Hardware Standby Q D P6 1 DDR C WP6D Reset Internal data bus Reset Bus controller Bus release enable R P61 Q D P61 DR C WP6 RP6 BREQ input WP6D: Write to P6DDR WP6: Write to port 6 RP6: Read port 6 Figure C.2 (b) Port 6 Block Diagram (Pin P61) 585 R Hardware standby Q D P6 2 DDR C WP6D Reset Internal data bus Reset R Q P62 D P62 DR C WP6 Bus controller Bus release enable BACK output RP6 WP6D: Write to P6DDR WP6: Write to port 6 RP6: Read port 6 Figure C.2 (c) Port 6 Block Diagram (Pin P62) 586 Hardware standby Internal data bus output enable output P67 RP6 RP6: Read port 6 Figure C.2 (d) Port 6 Block Diagram (Pin P67) 587 Port 7 Block Diagrams RP7 P7n Internal data bus C.3 A/D converter Analog input Input enable Channel select signal RP7: Read port 7 n = 0 to 5 RP7 P7n Internal data bus Figure C.3 (a) Port 7 Block Diagram (Pins P7 0 to P75) A/D converter Analog input Input enable Channel select signal D/A converter Output enable Analog output RP7: Read port 7 n = 6, 7 Figure C.3 (b) Port 7 Block Diagram (Pins P76 and P77) 588 C.4 Port 8 Block Diagrams Reset Q D P8 0 DDR C WP8D Reset Internal data bus R R P80 Q D P80 DR C WP8 RP8 Interrupt controller WP8D: Write to P8DDR WP8: Write to port 8 RP8: Read port 8 IRQ 0 input Figure C.4 (a) Port 8 Block Diagram (Pin P8 0) 589 SSOE Software standby External bus released R Q D P8 n DDR C WP8D Internal data bus Reset Hardware standby Reset Bus controller CS 2 CS 3 output R Q P8 n D P8n DR C WP8 RP8 Interrupt controller IRQ 1 IRQ 2 input WP8D: Write to P8DDR WP8: Write to port 8 RP8: Read port 8 SSOE: Software standby output port enable n = 1, 2 Figure C.4 (b) Port 8 Block Diagram (Pins P81 and P82) 590 Reset R Q D P83DDR C Hardware standby Internal data bus Software standby SSOE External bus released Bus controller WP8D CS1 output Reset R Q D P83DR C P83 WP8 RP8 Interrupt controller IRQ3 input A/D converter ADTRG input WP8D: WP8: RP8: SSOE: Write to P8DDR Write to port 8 Read port 8 Software standby output port enable Figure C.4 (c) Port 8 Block Diagram (Pin P83) 591 Software standby SSOE External bus released R Q D P8 4 DDR C Hardware standby WP8D Reset R Q P84 D P84 DR C WP8 RP8 WP8D: WP8: RP8: SSOE: Write to P8DDR Write to port 8 Read port 8 Software standby output port enable Figure C.4 (d) Port 8 Block Diagram (Pin P84) 592 Internal data bus Reset Bus controller CS 0 output C.5 Port 9 Block Diagrams Reset Hardware standby Q D P9 0 DDR C WP9D Reset Internal data bus R R Q P90 D P90 DR C WP9 SCI Output enable Serial transmit data Guard time RP9 WP9D: Write to P9DDR WP9: Write to port 9 RP9: Read port 9 Figure C.5 (a) Port 9 Block Diagram (Pin P9 0) 593 Reset Hardware standby Q D P9 1 DDR C WP9D Reset Internal data bus R R Q P91 D P91 DR C WP9 RP9 WP9D: Write to P9DDR WP9: Write to port 9 RP9: Read port 9 Figure C.5 (b) Port 9 Block Diagram (Pin P91) 594 SCI Output enable Serial transmit data Guard time R Q Hardware standby D P9 2 DDR C WP9D Reset Internal data bus Reset SCI Input enable R P9 2 Q D P9 2 DR C WP9 RP9 Serial receive data WP9D: Write to P9DDR WP9: Write to port 9 RP9: Read port 9 Figure C.5 (c) Port 9 Block Diagram (Pin P92) 595 Hardware standby R Q D P93DDR C WP9D Reset Internal data bus Reset SCI Input enable R Q D P93DR C P93 WP9 RP9 Serial receive data WP9D: Write to P9DDR WP9: Write to port 9 RP9: Read port 9 Figure C.5 (d) Port 9 Block Diagram (Pin P93) 596 R Hardware standby Q D P9 4DDR C WP9D Reset Internal data bus Reset SCI Clock input enable R Q P94 D P9 4 DR C WP9 Clock output enable Clock output RP9 Clock input WP9D: Write to P9DDR WP9: Write to port 9 RP9: Read port 9 Interrupt controller IRQ 4 input Figure C.5 (e) Port 9 Block Diagram (Pin P94) 597 Hardware standby R Q D P95DDR C WP9D Reset Internal data bus Reset SCI Clock input enable R Q D P95DR C P95 WP9 Clock output enable Clock output RP9 Clock input Interrupt controller IRQ5 input WP9D : Write to P9DDR WP9 : Write to port 9 RP9 : Read port 9 Figure C.5 (f) Port 9 Block Diagram (Pin P95) 598 Port A Block Diagrams Reset Internal data bus C.6 R Hardware standby Q D PA n DDR C WPAD Reset TPC output enable R PA n Q TPC D PA n DR C Next data WPA Output trigger 16-bit timer RPA WPAD: Write to PADDR WPA: Write to port A RPA: Read port A n = 0, 1 Counter clock input 8-bit timer Counter clock input Figure C.6 (a) Port A Block Diagram (Pins PA0 and PA1) 599 Internal data bus Reset Hardware standby R Q D PA n DDR C WPAD Reset TPC output enable R Q PA n TPC D PA n DR C Next data WPA Output trigger 16-bit timer Output enable Compare match output RPA WPAD: Write to PADDR WPA: Write to port A RPA: Read port A n = 2, 3 Input capture Counter clock input 8-bit timer Counter clock input Figure C.6 (b) Port A Block Diagram (Pins PA 2 and PA3) 600 Software standby Hardware standby Internal data bus Address output enable Modes 3 and 4 Reset R Q D PAnDDR C WPAD Internal address bus SSOE Bus released TPC Reset TPC output enable R PA n Q D PAnDR Next data C WPA Output trigger 16-bit timer Output enable Compare match output RPA Input capture WPAD: Write to PADDR WPA: Write to port A RPA: Read port A SSOE: Software standby output port enable n = 4 to 7 Note: The PA7 address output enable setting is fixed at 1 in modes 3 and 4. Figure C.6 (c) Port A Block Diagram (Pins PA4 to PA7) 601 C.7 Port B Block Diagrams Software standby SSOE Reset Internal data bus Hardware standby R Q D PB n DDR C Bus controller CS7 CS5 output WPBD Bus released CS output enable TPC Reset PBn Mode 1 to 5 TPC output enable R Q D PB n DR C Next data WPB Output trigger 8-bit timer Output enable Compare match output RPB WPBD: Write to PBDDR WPB: Write to port B RPB: Read port B SSOE: Software standby output port enable n=0,2 Figure C.7 (a) Port B Block Diagram (Pins PB0 and PB2) 602 Software standby Internal data bus SSOE Hardware standby Reset R Q D PBnDDR C PBn Bus released WPBD Mode 1 to 5 Reset Bus controller CS6 CS4 output CS output enable TPC TPC output enable R Q D PBnDR C Next data WPB Output trigger 8-bit timer Output enable Compare match output RPB TMO2 TMO3 input WPBD: WPB: RPB: SSOE: n = 1, 3 Write to PBDDR Write to port B Read port B Software standby output port enable Figure C.7 (b) Port B Block Diagram (Pins PB1 and PB3) 603 Internal data bus Reset R Hardware standby Q D PB 4 DDR C TPC WPBD Reset TPC output enable R PB4 Q D PB 4 DR C Next data WPB Output trigger RPB WPBD: Write to PBDDR WPB: Write to port B RPB: Read port B Figure C.7 (c) Port B Block Diagram (Pin PB4) 604 Internal data bus Reset Hardware standby R Q D PB5DDR C WPBD Reset TPC R PB5 Q TPC output enable D PB5DR C Next data WPB Output trigger RPB WPBD: Write to PBDDR WPB: Write to port B RPB: Read port B Figure C.7 (d) Port B Block Diagram (Pin PB 5) 605 Internal data bus Reset R Q Hardware standby PB 6 DDR D C WPBD TPC Reset TPC output enable R PB6 Q PB6 DR D Next data C WPB Output trigger RPB WPBD: Write to PBDDR WPB: Write to port B RPB: Read port B Figure C.7 (e) Port B Block Diagram (Pin PB6) 606 Internal data bus Reset R Hardware standby Q PB 7 DDR D C WPBD Reset TPC TPC output enable R PB7 Q PB7 DR D Next data C WPB Output trigger RPB WPBD: Write to PBDDR WPB: Write to port B RPB: Read port B Figure C.7 (f) Port B Block Diagram (Pin PB7) 607 Appendix D Pin States D.1 Port States in Each Mode Table D.1 Pin Name A7 to A 0 Port States Mode Hardware Standby Software Reset Mode Standby Mode BusReleased Mode Program Execution Mode -- L T A7 to A 0 T (SSOE = 0) T (SSOE = 1) Keep A15 to A 8 -- L T (SSOE = 0) T (SSOE = 1) Keep T A15 to A 8 D15 to D8 -- T T T T D15 to D8 P47 to P4 0 1, 3 T T Keep Keep I/O port 2, 4 T T T T D7 to D0 A19 to A 16 -- L T (SSOE = 0) T (SSOE = 1) Keep T A19 to A 16 P60 -- T T Keep Keep I/O port WAIT P61 -- T T (BRLE = 0) Keep (BRLE = 1) T T I/O port BREQ P62 -- T T (BRLE = 0) Keep (BRLE = 1) H L (BRLE = 0) I/O port (BRLE = 1) BACK AS, RD, -- HWR, LWR H T (SSOE = 0) T (SSOE = 1) H T AS, RD, HWR, LWR P67 Clock T output (PSTOP = 0) H (PSTOP = 1) Keep (PSTOP = 0) (PSTOP = 1) Keep (PSTOP = 0) (PSTOP = 1) Input port 608 -- Hardware Standby Software Reset Mode Standby Mode BusReleased Mode Program Execution Mode P77 to P7 0 -- T T T T Input port P80 -- T T Keep -- I/O port P81 -- T T (DDR=0) T (DDR=1, SSOE=0) T (DDR=1, SSOE=1) H (DDR=0) Keep (DDR=1) T (DDR=0) Input port (DDR=1) CS 3 P82 -- T T (DDR=0) T (DDR=1, SSOE=0) T (DDR=1, SSOE=1) H (DDR=0) Keep (DDR=1) T (DDR=0) Input port (DDR=1) CS 2 P83 -- T T (DDR=0) T (DDR=1, SSOE=0) T (DDR=1, SSOE=1) H (DDR=0) Keep (DDR=1) T (DDR=0) Input port (DDR=1) CS 1 P84 -- H T (DDR=0) T (DDR=1, SSOE=0) T (DDR=1, SSOE=1) H (DDR=0) Keep (DDR=1) T (DDR=0) Input port (DDR=1) CS 0 P95 to P9 0 -- T T Keep Keep I/O port PA3 to PA 0 -- T T Keep Keep I/O port PA6 to PA 4 1, 2 T T Keep Pin Name Mode 3, 4 T T (Address output)* (SSOE = 0) T (SSOE = 1) Keep (Otherwise)*2 Keep Keep 1 I/O port 1 (Address output)* T (Otherwise)*2 Keep (Address output)*1 A23 to A 21 (Otherwise)*2 I/O port 609 Pin Name Mode Hardware Standby Software Reset Mode Standby Mode PA7 1, 2 T T 3, 4 L PB3 to PB 0 -- PB7 to PB 4 -- BusReleased Mode Program Execution Mode Keep Keep I/O port T (SSOE = 0) T (SSOE = 1) Keep T A20 T T (CS output)* 3 (SSOE = 0) T (SSOE = 1) H (Otherwise)*4 Keep (CS output)* 3 T (Otherwise)*4 Keep (CS output)* 3 CS 7 to CS 4 (Otherwise)*4 I/O port T T Keep Keep I/O port Legend: H: High L: Low T: High-impedance state keep: Input pins are in the high-impedance state; output pins maintain their previous state. DDR: Data direction register Notes: *1 When A23E, A22E, A21E = 0 in BRCR (bus release control register). *2 When A23E, A22E, A21E = 1 in BRCR (bus release control register). *3 When CS7E, CS6E, CS5E, CS4E = 1 in CSCR (chip select control register). *4 When CS7E, CS6E, CS5E, CS4E = 0 in CSCR (chip select control register). 610 D.2 Pin States at Reset Modes 1 and 2: Figure D.1 is a timing diagram for the case in which RES goes low during an external memory access in mode 1 or 2. As soon as RES goes low, all ports are initialized to the input state. AS, RD, HWR, LWR, and CS0 go high, and D15 to D0 go to the high-impedance state. The address bus is initialized to the low output level 2.5 clock cycles after the low level of RES is sampled. Clock pin P67/ goes to the output state at the next rise of after RES goes low. Access to external memory T1 T2 T3 P67/ RES Internal reset signal A19 to A0 H'00000 CS0 AS, RD (read) HWR, LWR (write) D15 to D0 (write) High impedance I/O port, CS7 to CS1 High impedance Figure D.1 Reset during Memory Access (Modes 1 and 2) 611 Modes 3 and 4: Figure D.2 is a timing diagram for the case in which RES goes low during an external memory access in mode 3 or 4. As soon as RES goes low, all ports are initialized to the input state. AS, RD, HWR, LWR, and CS0 go high, and D15 to D0 go to the high-impedance state. The address bus is initialized to the low output level 2.5 clock cycles after the low level of RES is sampled. However, when PA4 to PA 6 are used as address bus pins, or when P83 to P81 and PB0 to PB 3 are used as CS output pins, they go to the high-impedance state at the same time as RES goes low. Clock pin P67/ goes to the output state at the next rise of after RES goes low. Access to external memory T1 T2 T3 P67/ RES Internal reset signal A20 to A0 H'00000 CS0 AS, RD (read) HWR, LWR (write) D15 to D0 (write) High impedance I/O port, PA4/A23 to PA6/A21, CS7 to CS1 High impedance Figure D.2 Reset during Memory Access (Modes 3 and 4) 612 Appendix E Timing of Transition to and Recovery from Hardware Standby Mode Timing of Transition to Hardware Standby Mode 1. To retain RAM contents with the RAME bit set to 1 in SYSCR, drive the RES signal low 10 system clock cycles before the STBY signal goes low, as shown below. RES must remain low until STBY goes low (minimum delay from STBY low to RES high: 0 ns). STBY t1 10tcyc t2 0 ns RES 2. To retain RAM contents with the RAME bit cleared to 0 in SYSCR, RES does not have to be driven low as in (1). Timing of Recovery from Hardware Standby Mode: Drive the RES signal low approximately 100 ns before STBY goes high. STBY t 100 ns tOSC RES 613 Appendix F Product Code Lineup Table F.1 H8/3008 Product Code Lineup Product Type H8/3008 ROMless 5V 3V 614 Product Code Mark Code Package (Hitachi Package Code) HD6413008F HD6413008F 100-pin QFP (FP-100B) HD6413008TE HD6413008TE 100-pin TQFP (TFP-100B) HD6413008VF HD6413008VF 100-pin QFP (FP-100B) HD6413008VTE HD6413008VTE 100-pin TQFP (TFP-100B) Appendix G Package Dimensions Figure G.1 shows the FP-100B package dimensions of the H8/3008. Figure G.2 shows the TFP100B package dimensions. Unit: mm 16.0 0.3 14 75 51 50 100 26 0.10 *Dimension including the plating thickness Base material dimension *0.17 0.05 0.15 0.04 2.70 25 0.08 M 1.0 0.12 +0.13 n0.12 1 *0.22 0.05 0.20 0.04 3.05 Max 0.5 16.0 0.3 76 1.0 0 - 8 0.5 0.2 Hitachi Code JEDEC JEITA Mass (reference value) FP-100B - Conforms 1.2 g Figure G.1 Package Dimensions (FP-100B) 615 Unit: mm 16.0 0.2 14 75 51 50 0.5 16.0 0.2 76 100 0.10 *Dimension including the plating thickness Base material dimension 0.10 0.10 1.0 1.00 0.08 M *0.17 0.05 0.15 0.04 25 1.20 Max 26 1 *0.22 0.05 0.20 0.04 1.0 0.5 0.1 Hitachi Code JEDEC JEITA Mass (reference value) Figure G.2 Package Dimensions (TFP-100B) 616 0 - 8 TFP-100B - Conforms 0.5 g Appendix H Comparison of H8/300H Series Product Specifications H.1 Differences between H8/3067 and H8/3062 Series, H8/3048 Series, H8/3006 and H8/3007, and H8/3008 Item 1 Operating Mode 5 mode H8/3067 Series, H8/3062 Series H8/3048 Series H8/3006, H8/3007 H8/3008 16 Mbyte ROM enabled expanded mode 1 Mbyte ROM enabled expanded mode 64 kbyte single-chip mode 16 Mbyte ROM enabled expanded mode 2 Interrupt Internal controller interrupt sources 36 (H8/3067) 30 36 27 3 Bus Burst ROM controller interface Yes (H8/3067) No Yes No Mode 6 4 DRAM interface 27 (H8/3062 Series) No (H8/3062 Series) Idle cycle insertion function Yes No Yes Yes Wait mode 2 modes 4 modes 2 modes 2 modes Wait state number setting Per area Common to all areas Per area Per area Address output method Choice of address Fixed update mode (fixed in H8/3067F-ZTAT and H8/3062F-ZTAT) Fixed Choice of address update mode Connectable Area 2/3/4/5 areas (H8/3067 only) Area 3 Area 2/3/4/5 No Precharge cycle insertion function Yes (H8/3067 only) No Yes No Fast page mode Yes (H8/3067 only) No Yes No 8 bit/9 bit 8 bit/9 bit/10 bit No Address 8 bit/9 bit/10 bit shift amount (H8/3067 only) 617 H8/3067 Series, H8/3062 Series Item 5 Timer functions Number of channels 16-bit timers 8-bit timers 16 bits x 3 8 bits x 4 (16 bits x 2) H8/3048 Series H8/3006, H8/3007 ITU 16-bit timers 8-bit timers H8/3008 16-bit timers 8-bit timers 16 bits x 5 16 bits x 3 8 bits x 4 (16 bits x 2) 16 bits x 3 8 bits x 4 (16 bits x 2) Pulse output 6 pins 4 pins (2 pins) 12 pins 6 pins 4 pins (2 pins) 6 pins 4 pins (2 pins) Input capture 6 2 10 6 2 6 2 External clock 4 systems 4 systems 4 systems 4 systems 4 systems 4 systems 4 systems (selec(fixed) (selec(selec(fixed) (selec(fixed) table) table) table) table) Internal clock , /2, /4, /8, /64, /8 /8192 , /2, /4, , /2, /4, /8, /64, /8 /8 /8192 , /2, /4, /8, /64, /8 /8192 Complementary PWM function No No Yes No No No No ResetNo synchronous PWM function No Yes No No No No Buffer operation No No Yes No No No No Output initialization function Yes No No Yes No Yes No 4 (2) 5 3 4 (2) 3 4 (2) PWM output 3 DMAC activation 3 channels No (H8/3067 only) 4 channels 3 channels No No A/D conversion activation No No Yes Interrupt sources 3 sources 8 sources 3 sources 3 sources 8 sources 8 sources x3 x5 x3 6 TPC Time base 3 kinds, 16-bit timer base 4 kinds, ITU base 3 kinds, 16-bit timer base 3 kinds, 16-bit timer base 7 WDT Reset signal external output function Yes (except products with on-chip flash memory) Yes Yes Yes 618 Yes No Yes Item 8 SCI H8/3048 Series H8/3006, H8/3007 H8/3008 Number of channels 3 channels (H8/3067) 2 channels 3 channels Smart card interface Supported on all channels Supported Supported on all on SCI0 channels only Supported on all channels External trigger/8-bit timer compare match External trigger External trigger/8-bit timer compare match External trigger/8-bit timer compare match Conversion states 70/134 134/266 70/134 70/134 pin /input port multiplexing output only /input port multiplexing output/input port 9 A/D Conversion converter start trigger input 10 Pin control H8/3067 Series, H8/3062 Series 2 channels 2 channels (H8/3062 Series) A20 in 16 MB A20 / I/O port ROM multiplexing enabled expanded mode A20 output Address bus, High-level output/high- High-level High-level output/high- High-level output/highAS, RD, impedance selectable output impedance selectable impedance selectable HWR, LWR, (RFSH: H8/3067 only) (except CS7-CS0, CS0) RFSH in Low-level software output standby (CS0) state CS7-CS0 in High-impedance bus-released state 11 Flash Program/ memory erase functions voltage Block divisions 12 V application unnecessary. Single-power-supply programming. High-level High-impedance output High-impedance 12 V application from offchip 8 blocks (12 blocks in 16 blocks H8/3064F-ZTAT B-mask version) 619 H.2 Comparison of Pin Functions of 100-Pin Package Products (FP-100B, TFP-100B) Table H.1 Pin Arrangement of Each Product (FP-100B, TFP-100B) On-chip-ROM Products Pin No. ROMless Products H8/3006, H8/3007 H8/3008 VCC VCC VCC/VCL*2 H8/3067 Series H8/3062 Series H8/3048 Series H8/3042 Series 2 1 VCC 2 PB 0/TP8/TMO0/ PB 0/TP8/TMO0/ PB 0/TP8/ CS7 CS7 TIOCA3 PB 0/TP8/ TIOCA3 PB 0/TP8/TMO0/ PB 0/TP8/TMO0/ CS7 CS7 3 PB 1/TP9/TMIO1/ PB 1/TP9/TMIO1/ PB 1/TP9/ DREQ0/CS6 CS6 TIOCB3 PB 1/TP9/ TIOCB3 PB 1/TP9/TMIO1/ PB 1/TP9/TMIO1/ DREQ0/CS6 CS6 4 PB 2/TP10/TMO2/ PB 2/TP10/TMO2/ PB 2/TP10/ CS5 CS5 TIOCA4 PB 2/TP10/ TIOCA4 PB 2/TP10/TMO2/ PB 2/TP10/TMO2/ CS5 CS5 5 PB 3/TP11/ TMIO3/DREQ1/ CS4 PB 3/TP11/ TMIO3/CS4 PB 3/TP11/ TIOCB4 PB 3/TP11/ TIOCB4 PB 3/TP11/ TMIO3/DREQ1/ CS4 PB 3/TP11/ TMIO3/CS4 6 PB 4/TP12/ UCAS PB 4/TP12 PB 4/TP12/ TOCXA 4 PB 4/TP12/ TOCXA 4 PB 4/TP12/ UCAS PB 4/TP12 7 PB 5/TP13/ LCAS/SCK 2 PB 5/TP13 PB 5/TP13/ TOCXB 4 PB 5/TP13/ TOCXB 4 PB 5/TP13/ LCAS/SCK 2 PB 5/TP13 8 PB 6/TP14/TxD2 PB 6/TP14 PB 6/TP14/ DREQ0/CS7 PB 6/TP14/ DREQ0 PB 6/TP14/TxD2 PB 6/TP14 9 PB 7/TP15/RxD2 PB 7/TP15 PB 7/TP15/ PB 7/TP15/ DREQ1/ADTRG DREQ1/ADTRG PB 7/TP15/RxD2 PB 7/TP15 10 RESO/FWE*1 RESO/FWE*1 RESO/V PP RESO RESO NC/RESO 11 Vss Vss Vss Vss Vss Vss 12 P90/TxD0 P90/TxD0 P90/TxD0 P90/TxD0 P90/TxD0 P90/TxD0 13 P91/TxD1 P91/TxD1 P91/TxD1 P91/TxD1 P91/TxD1 P91/TxD1 14 P92/RxD0 P92/RxD0 P92/RxD0 P92/RxD0 P92/RxD0 P92/RxD0 15 P93/RxD1 P93/RxD1 P93/RxD1 P93/RxD1 P93/RxD1 P93/RxD1 16 P94/SCK 0/IRQ4 P94/SCK 0/IRQ4 P94/SCK 0/IRQ4 P94/SCK 0/IRQ4 P94/SCK 0/IRQ4 P94/SCK 0/IRQ4 17 P95/SCK 1/IRQ5 P95/SCK 1/IRQ5 P95/SCK 1/IRQ5 P95/SCK 1/IRQ5 P95/SCK 1/IRQ5 P95/SCK 1/IRQ5 18 P40/D0 P40/D0 P40/D0 P40/D0 P40/D0 P40/D0 19 P41/D1 P41/D1 P41/D1 P41/D1 P41/D1 P41/D1 20 P42/D2 P42/D2 P42/D2 P42/D2 P42/D2 P42/D2 21 P43/D3 P43/D3 P43/D3 P43/D3 P43/D3 P43/D3 22 Vss Vss Vss Vss Vss Vss 23 P44/D4 P44/D4 P44/D4 P44/D4 P44/D4 P44/D4 24 P45/D5 P45/D5 P45/D5 P45/D5 P45/D5 P45/D5 620 VCC/VCL* VCC On-chip-ROM Products ROMless Products Pin No. H8/3067 Series H8/3062 Series H8/3048 Series H8/3042 Series H8/3006, H8/3007 H8/3008 25 P46/D6 P46/D6 P46/D6 P46/D6 P46/D6 P46/D6 26 P47/D7 P47/D7 P47/D7 P47/D7 P47/D7 P47/D7 27 P30/D8 P30/D8 P30/D8 P30/D8 D8 D8 28 P31/D9 P31/D9 P31/D9 P31/D9 D9 D9 29 P32/D10 P32/D10 P32/D10 P32/D10 D10 D10 30 P33/D11 P33/D11 P33/D11 P33/D11 D11 D11 31 P34/D12 P34/D12 P34/D12 P34/D12 D12 D12 32 P35/D13 P35/D13 P35/D13 P35/D13 D13 D13 33 P36/D14 P36/D14 P36/D14 P36/D14 D14 D14 34 P37/D15 P37/D15 P37/D15 P37/D15 D15 D15 35 Vcc Vcc Vcc Vcc Vcc Vcc 36 P10/A 0 P10/A 0 P10/A 0 P10/A 0 A0 A0 37 P11/A 1 P11/A 1 P11/A 1 P11/A 1 A1 A1 38 P12/A 2 P12/A 2 P12/A 2 P12/A 2 A2 A2 39 P13/A 3 P13/A 3 P13/A 3 P13/A 3 A3 A3 40 P14/A 4 P14/A 4 P14/A 4 P14/A 4 A4 A4 41 P15/A 5 P15/A 5 P15/A 5 P15/A 5 A5 A5 42 P16/A 6 P16/A 6 P16/A 6 P16/A 6 A6 A6 43 P17/A 7 P17/A 7 P17/A 7 P17/A 7 A7 A7 44 Vss Vss Vss Vss Vss Vss 45 P20/A 8 P20/A 8 P20/A 8 P20/A 8 A8 A8 46 P21/A 9 P21/A 9 P21/A 9 P21/A 9 A9 A9 47 P22/A 10 P22/A 10 P22/A 10 P22/A 10 A10 A10 48 P23/A 11 P23/A 11 P23/A 11 P23/A 11 A11 A11 49 P24/A 12 P24/A 12 P24/A 12 P24/A 12 A12 A12 50 P25/A 13 P25/A 13 P25/A 13 P25/A 13 A13 A13 51 P26/A 14 P26/A 14 P26/A 14 P26/A 14 A14 A14 52 P27/A 15 P27/A 15 P27/A 15 P27/A 15 A15 A15 53 P50/A 16 P50/A 16 P50/A 16 P50/A 16 A16 A16 54 P51/A 17 P51/A 17 P51/A 17 P51/A 17 A17 A17 55 P52/A 18 P52/A 18 P52/A 18 P52/A 18 A18 A18 56 P53/A 19 P53/A 19 P53/A 19 P53/A 19 A19 A19 57 Vss Vss Vss Vss Vss Vss 58 P60/WAIT P60/WAIT P60/WAIT P60/WAIT P60/WAIT P60/WAIT 621 On-chip-ROM Products ROMless Products Pin No. H8/3067 Series H8/3062 Series H8/3048 Series H8/3042 Series H8/3006, H8/3007 H8/3008 59 P61/BREQ P61/BREQ P61/BREQ P61/BREQ P61/BREQ P61/BREQ 60 P62/BACK P62/BACK P62/BACK P62/BACK P62/BACK P62/BACK 61 P67/ P67/ P67/ P67/ 62 STBY STBY STBY STBY STBY STBY 63 RES RES RES RES RES RES 64 NMI NMI NMI NMI NMI NMI 65 Vss Vss Vss Vss Vss Vss 66 EXTAL EXTAL EXTAL EXTAL EXTAL EXTAL 67 XTAL XTAL XTAL XTAL XTAL XTAL 68 Vcc Vcc Vcc Vcc Vcc Vcc 69 P63/AS P63/AS P63/AS P63/AS AS AS 70 P64/RD P64/RD P64/RD P64/RD RD RD 71 P65/HWR P65/HWR P65/HWR P65/HWR HWR HWR 72 P66/LWR P66/LWR P66/LWR P66/LWR LWR LWR 73 MD0 MD0 MD0 MD0 MD0 MD0 74 MD1 MD1 MD1 MD1 MD1 MD1 75 MD2 MD2 MD2 MD2 MD2 MD2 76 AVcc AVcc AVcc AVcc AVcc AVcc 77 VREF VREF VREF VREF VREF VREF 78 P70/AN0 P70/AN0 P70/AN0 P70/AN0 P70/AN0 P70/AN0 79 P71/AN1 P71/AN1 P71/AN1 P71/AN1 P71/AN1 P71/AN1 80 P72/AN2 P72/AN2 P72/AN2 P72/AN2 P72/AN2 P72/AN2 81 P73/AN3 P73/AN3 P73/AN3 P73/AN3 P73/AN3 P73/AN3 82 P74/AN4 P74/AN4 P74/AN4 P74/AN4 P74/AN4 P74/AN4 83 P75/AN5 P75/AN5 P75/AN5 P75/AN5 P75/AN5 P75/AN5 84 P76/AN6/DA0 P76/AN6/DA0 P76/AN6/DA0 P76/AN6/DA0 P76/AN6/DA0 P76/AN6/DA0 85 P77/AN7/DA1 P77/AN7/DA1 P77/AN7/DA1 P77/AN7/DA1 P77/AN7/DA1 P77/AN7/DA1 86 AVss AVss AVss AVss AVss AVss 87 P80/RFSH/IRQ0 P80/IRQ0 P80/RFSH/IRQ0 P80/RFSH/IRQ0 P80/RFSH/IRQ0 P80/IRQ0 88 P81/CS3/IRQ1 P81/CS3/IRQ1 P81/CS3/IRQ1 P81/CS3/IRQ1 P81/CS3/IRQ1 P81/CS3/IRQ1 89 P82/CS2/IRQ2 P82/CS2/IRQ2 P82/CS2/IRQ2 P82/CS2/IRQ2 P82/CS2/IRQ2 P82/CS2/IRQ2 90 P83/CS1/IRQ3/ ADTRG P83/CS1/IRQ3/ ADTRG P83/CS1/IRQ3 P83/CS1/IRQ3 P83/CS1/IRQ3/ ADTRG P83/CS1/IRQ3/ ADTRG 91 P84/CS0 P84/CS0 P84/CS0 P84/CS0 P84/CS0 P84/CS0 92 Vss Vss Vss Vss Vss Vss 622 On-chip-ROM Products Pin No. ROMless Products H8/3067 Series H8/3062 Series H8/3048 Series H8/3042 Series H8/3006, H8/3007 H8/3008 93 PA 0/TP0/ TEND 0/TCLKA PA 0/TP0/TCLKA PA 0/TP0/ TEND 0/TCLKA PA 0/TP0/ TEND 0/TCLKA PA 0/TP0/ TEND 0/TCLKA PA 0/TP0/ TCLKA 94 PA 1/TP1/ TEND 1/TCLKB PA 1/TP1/TCLKB PA 1/TP1/ TEND 1/TCLKB PA 1/TP1/ TEND 1/TCLKB PA 1/TP1/ TEND 1/TCLKB PA 1/TP1/ TCLKB 95 PA 2/TP2/ PA 2/TP2/ PA 2/TP2/ PA 2/TP2/ TIOCA0/TCLKC TIOCA0/TCLKC TIOCA0/TCLKC TIOCA0/TCLKC PA 2/TP2/ PA 2/TP2/ TIOCA0/TCLKC TIOCA0/TCLKC 96 PA 3/TP3/ PA 3/TP3/ PA 3/TP3/ PA 3/TP3/ TIOCB0/TCLKD TIOCB0/TCLKD TIOCB0/TCLKD TIOCB0/TCLKD PA 3/TP3/ PA 3/TP3/ TIOCB0/TCLKD TIOCB0/TCLKD 97 PA 4/TP4/ TIOCA1/A 23 PA 4/TP4/ TIOCA1/A 23 PA 4/TP4/ PA 4/TP4/ TIOCA1/CS6/A 23 TIOCA1/A 23 PA 4/TP4/ TIOCA1/A 23 PA 4/TP4/ TIOCA1/A 23 98 PA 5/TP5/ TIOCB1/A 22 PA 5/TP5/ TIOCB1/A 22 PA 5/TP5/ PA 5/TP5/ TIOCB1/CS5/A 22 TIOCB1/A 22 PA 5/TP5/ TIOCB1/A 22 PA 5/TP5/ TIOCB1/A 22 99 PA 6/TP6/ TIOCA2/A 21 PA 6/TP6/ TIOCA2/A 21 PA 6/TP6/ PA 6/TP6/ TIOCA2/CS4/A 21 TIOCA2/A 21 PA 6/TP6/ TIOCA2/A 21 PA 6/TP6/ TIOCA2/A 21 100 PA 7/TP7/ TIOCB2/A 20 PA 7/TP7/ TIOCB2/A 20 PA 7/TP7/ TIOCB2/A 20 PA 7/TP7/ TIOCB2/A 20 PA 7/TP7/ TIOCB2/A 20 PA 7/TP7/ TIOCB2/A 20 Notes: *1 Functions as RESO in the mask ROM versions, and as FWE in the on-chip flash memory versions. *2 The 5 V operation models of the H8/3064F-ZTAT B-mask version and the H8/3062FZTAT B-mask version have a VCL pin, and require an external capacitor (0.1 F). 623 624 H8/3008 Hardware Manual Publication Date: 1st Edition, September 2000 3rd Edition, May 2002 Published by: Business Operating Division Semiconductor & Integrated Circuits Hitachi, Ltd. Edited by: Technical Documentation Group Hitachi Kodaira Semiconductor Co., Ltd. Copyright (c) Hitachi, Ltd., 2000. All rights reserved. Printed in Japan.