gen4-IoD-24T (Resistive touch)
gen4-IoD-28T (Resistive touch)
gen4-IoD-32T (Resistive touch)
WWW.4DSYSTEMS.COM.AU
gen4-Internet of Displays Series
DATASHEET
DOCUMENT DATE: 05th March 2019
DOCUMENT REVISION: 1.2
Uncontrolled Copy when printed or downloaded.
Please refer to the 4D Systems website for the latest
Revision of this document
Table of Contents
gen4-IoD-24T/28T/32T Page 2 of 22 www.4dsystems.com.au
Table of Contents
1. Description ...................................................................................................................4
2. Features .......................................................................................................................4
3. Hardware Overview ......................................................................................................5
4. Hardware Interface – Pins .............................................................................................6
4.1. Serial Ports – TTL Level Serial ........................................................................................ 6
4.2. System Pins .................................................................................................................... 6
4.3. SPI – (Used internally) .................................................................................................... 6
5. ESP8266 SoC .................................................................................................................7
6. SD/SDHC Memory Cards ...............................................................................................7
7. FCC Cable .....................................................................................................................7
8. Application PCB Support ...............................................................................................7
9. Display/Module Precautions .........................................................................................8
10. Hardware Tools ............................................................................................................8
10.1. Programming Adaptor ................................................................................................... 8
11. Internal / External Antenna ...........................................................................................9
12. FCC Cable Orientation ...................................................................................................9
13. Programming the IoD .................................................................................................. 10
13.1. Arduino IDE .................................................................................................................... 10
13.2. Additional Libraries ........................................................................................................ 10
13.3. 4D Systems – Workshop 4 IDE ....................................................................................... 11
14. Starter Kit ................................................................................................................... 12
15. Display Module Numbers ............................................................................................ 12
16. Mechanical Details – gen4-IoD 2.4’’ ............................................................................. 13
17. Mechanical Details – gen4-IoD 2.8’’ ............................................................................. 14
18. Mechanical Details – gen4-IoD 3.2 ............................................................................... 15
19. Mechanical Details - 4D – Universal Programming Adaptor .......................................... 16
20. Schematic Details – gen4-IoD Display .......................................................................... 17
21. Schematic Details - 4D – Universal Programming Adaptor ............................................ 18
Table of Contents
gen4-IoD-24T/28T/32T Page 3 of 22 www.4dsystems.com.au
22. Specifications ............................................................................................................. 19
23. Hardware Revision History .......................................................................................... 21
24. Datasheet Revision History ......................................................................................... 21
25. Legal Notice ................................................................................................................ 22
26. Contact Information ................................................................................................... 22
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 4 of 22 www.4dsystems.com.au
1. Description
The gen4-IoD (Internet of Displays) series of is part of
the latest gen4 Range of modules Designed and
Manufactured by 4D Systems.
The gen4 series was designed specifically for ease of
integration and use, with careful consideration for
space requirements and functionality.
This specific gen4 module features a 2.4”, 2.8” or a
3.2” colour TFT LCD display, with Resistive Touch. It is
powered by the WiFi enabled ESP8266, which offers
an array of functionality and options for any Designer
/ Integrator / User.
The gen4-IoD range can be easily programmed using
4D Systems Workshop4 or the Arduino IDE installed
with the ESP8266 core.
The feature rich 4D Systems GFX4d library enables
speedy development of applications by providing
extensive primitive graphics functions, enhanced
graphics via Workshop4, SD card and touch routines,
integrated into a single library.
The on-board SD card socket enables the use of FAT16
or FAT32 formatted cards for extensive storage
capabilities.
The gen4-IoD series of Integrated Display Modules
features a 10 pin ZIF socket, designed for a 10 pin FFC
cable, for easy and simple connection to an application
or mother board, or for connecting to accessory
boards for a range of functionality advancements.
The gen4 series of modules has been designed to
minimise the impact of display related circuitry, and
provide a platform suitable for integration into a
product. Application boards can sit flush on the back
of the gen4 if required, as the display related
electronics sit inside the plastic mounting base, leaving
the application board surface clear for User circuitry.
More information on the Espressif ESP8266 SoC can be
found on the Espressif website http://espressif.com,
and from the ESP8266EX SoC datasheet itself:
http://www.espressif.com/sites/default/files/docum
entation/0a-esp8266ex_datasheet_en.pdf
2. Features
• Powerful Intelligent LCD-TFT display module
powered by the Espressif ESP8266 SoC.
• 320 x 240 Resolution, RGB 65K true to life colours,
TFT Screen with integrated 4-wire Resistive Touch
Panel.
• Built in WiFi suitable for ‘Internet of things’
applications.
• 802.11 b/g/n/e/i support
• Integrated TCP/IP protocol stack
• WiFi 2.4 GHz, supporting WPA/WPA2 and
WEP/TKIP/AES, along with STA/AP/STA+AP/P2P
operation modes
• 4Mbit (512kb) of Flash memory for User Application
Code and Data.
• 128Kb of SRAM of which 80kb is available for the
User.
• 10pin FPC connection, for all signals, power,
communications and programming.
• On-board latch type microSD memory card
connector for multimedia storage and data logging
purposes.
• DOS compatible file access (FAT16 or FAT32 format).
• Display full colour images, animations, and icons.
• 4.0V to 5.5V range operation (single supply). A
1Amp+ supply is highly recommended for stability.
• Module dimensions:
(2.4”) 78.4 x 44.8 x 7.2mm.
(2.8”) 87.3 x 52.1 x 7.3mm.
(3.2”) 95.7 x 57.1 x 7.5mm.
• Weighing: ~26 g (2.4”), ~36 g (2.8”), ~44 g (3.2”),
• 4x mounting tabs with 3.2mm holes for mechanical
mounting using M3 screws.
• RoHS, REACH and CE compliant.
NOTE: Arduino is a trademark of Arduino Team, and all
references to the word “Arduino” or use of its
logo/marks are strictly in reference to the Arduino
product, and how this product is compatible with the
aspect of the product but is not associated with the
Arduino Team in anyway.
ESP8266 / ESP8266EX are products made by Espressif.
4D Systems is not associated with Espressif in anyway,
other than utilising their product inside of ours.
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 5 of 22 www.4dsystems.com.au
3. Hardware Overview
I = Input, O = Output, P = Power
Pin
Conditions
I/O
Description
1
GND
P
Supply Ground.
2
GND
P
Supply Ground.
3
RESET
I
Master Reset signal. Internally pulled up to 3.3V via a 10K resistor. An
active Low pulse greater than 2 micro-seconds will reset the module. If
the module needs to be reset externally, only use open collector type
circuits. This pin is not driven low by any internal conditions. The host
should control this pin via one of its port pins using an open
collector/drain arrangement.
4
GPIO0
I/O
I/O pin. This pin is used for backlight control and flash programming
5
RX
I
Asynchronous Serial Receive pin, TTL level. Connect this pin to the
Transmit (Tx) signal of other serial devices. Used in conjunction with the
TX pin for programming this microLCD. This pin is tolerant up to 3.3V
levels.
6
TX
O
Asynchronous Serial Transmit pin, TTL level. Connect this pin to the
Receive (Rx) signal of other serial devices. Used in conjunction with the
RX pin for programming this microLCD. This pin outputs 3.3V levels.
7
GND
P
Supply Ground.
8
GPIO16
I/O
I/O pin. Can be used as digital input or output. Can also be used for PWM
and 1-wire device interfacing. This pin is available to the user. This pin is
tolerant up to 3.3v levels.
9
5V IN
P
Main Voltage Supply +ve input pin. Range is 4.0V to 5.5V, nominal 5.0V.
10
5V IN
P
Main Voltage Supply +ve input pin. Range is 4.0V to 5.5V, nominal 5.0V.
Latch Type
microSD Socket
AR1021
Resistive Touch
Controller
4Mbit Flash
Memory for the
ESP8266
ESP8266 SoC
PIN 10
PIN 1
Ceramic chip antenna, and
U.FL external antenna connector
USER I/O – 10 way ZIF Socket
0.5mm pitch Upper Contact
5.5mm wide FPC Cable
2.4”, 2.8” or 3.2” TFT LCD
with Resistive Touch
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 6 of 22 www.4dsystems.com.au
4. Hardware Interface – Pins
This section describes in detail the hardware interface
pins of the device.
4.1. Serial Ports – TTL Level Serial
The ESP8266 Processor has a hardware asynchronous
serial ports that can be accessed via the 10 way FPC or
via the gen4-Iod-programmer. The serial port can be
used to communicate with external serial devices.
The primary features are:
Full-Duplex 8 bit data transmission and reception.
Data format: 8 bits, No Parity, 1 Stop bit.
Independent Baud rates from 300 baud up to
921600 baud.
Single byte transmits and receives or a fully
buffered service. The buffered service feature
runs in the background capturing and buffering
serial data without the user application having to
constantly poll any of the serial ports. This frees
up the application to service other tasks.
A single byte serial transmission consists of the start
bit, 8-bits of data followed by the stop bit. The start bit
is always 0, while a stop bit is always 1. The LSB (Least
Significant Bit, Bit 0) is sent out first following the start
bit. Figure below shows a single byte transmission
timing diagram.
The serial port is also the primary interface for User
program downloads, and configuration via the IDE.
4.2. System Pins
+5V IN (Module Voltage Input)
Module supply voltage input pins. Both of these pins
should be connected to a stable supply voltage in the
range of 4.0 Volts to 5.5 Volts DC. Nominal operating
voltage is 5.0 Volts. Note backlight brightness will be
dimmer for voltages under 5.0V.
GND (Module Ground)
Device ground pins. Both pins should be connected to
ground.
RESET (Module Master Reset)
Module Master Reset pin. An active low pulse of
greater than 2μs will reset the module. Internally
pulled up to 3.3V via a 10K resistor. Only use open
collector type circuits to reset the device if an external
reset is required.
GPIO0 (Backlight/Flash)
This pin is dedicated to both backlight control and the
Flashing of the IoD program memory via the
programming software. This pin must be left floating
at power-up to enable the ESP8266 to boot correctly.
If GPIO0 is set to be an input in User code once the
ESP8266 has booted, then this pin could be controlled
externally to adjust backlight brightness using PWM or
simple on/off control. Else, the backlight can be
controlled from the ESP8266 itself, with appropriate
User code.
GPIO16 (User GPIO)
Input/Output available to the user. This pin can be
used as a digital input or digital output to connect to
sensors, relays etc. This pin can also be used for ‘1-
wire’ protocol devices and as a PWM output.
4.3. SPI – (Used internally)
There is 1 hardware SPI channel (HWSPI) which is
dedicated to drive the screen, SD card and Resistive
Touch. The SPI channel can communicate at speeds up
to 80Mhz. The SPI channel is Master only, and cannot
be configured to be slave at this time, nor is it available
for the User externally.
Note: The SPI channel (HWSPI) is dedicated to
memory card, screen and touch controller. The HWSPI
channel cannot be reconfigured for alternate uses.
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 7 of 22 www.4dsystems.com.au
5. ESP8266 SoC
The module is designed around the ESP8266 SoC from
Espressif.
The ESP8266 is a 32bit RISC Microcontroller with built
in WiFi controller, and GPIO capability, however most
GPIO are utilised for on board features, such as the TFT
LCD, Touch Controller and microSD card.
The TFT-LCD display interfaces to the ESP8266 using
SPI, along with the microSD card and touch controller.
This enables high speed transfers for these
peripherals, providing fast graphics, fast SD card
access and responsive touch control.
Powerful graphics, text, image, animation, internet
access and countless more features are available to
the user via the 4D Systems GFX4d library and 4D
Systems Workshop 4 IDE. Alternatively, the Arduino
IDE can be used, and the User is able to write
drivers/software for the module as they require.
6. SD/SDHC Memory Cards
The gen4-IoD module supports microSD memory cards
via the on-board latch type micro-SD connector.
The memory card is used for
all multimedia file retrieval
such as images, animations
and data files.
The memory card can also be
used as general purpose
storage for data logging applications.
Support is available for off-the-shelf high capacity HC
memory cards (4GB and above). Memory cards up to
32GB is size can be used, as FAT16 or FAT32, however
it must be noted that only a portion of this can be
utilised by the FAT16 file system.
7. FCC Cable
The Standard FFC cable supplied has the following
specifications:
10 Pin Flexible Flat Cable, 150mm Long, 0.5mm
(0.02") pitch
Cable Type: AWM 20624 80C 60V VW-1
Heat Resistance 80 Degrees Celsius
Connections on the opposite side at each end
(Type B)
8. Application PCB Support
The gen4-IoD Display Module Series is designed to
accommodate a range of applications, and therefore is
suited for those wanting to make a customised
module, without the need for piggy-back or daughter
boards mounted on headers.
On the back of the gen4 module, the display related
circuitry will be found, which is recessed into the
plastic. The level of the plastic on the back of the gen4
module is higher than the tallest component on the
display circuit PCB, meaning an Application PCB can be
mounted on the back of the gen4, without affecting
the display related circuitry. An application board can
be made it fit inside the corner notches of the gen4
plastics.
Pictured: gen4-IoD-24T
The 10 way FFC flex cable can come out of the gen4
display module and into the application board, either
by coming up through a slot in the Users application
board, or by travelling along the channel in the gen4
plastic’s and emerging at the edge of the display
module then curving around into the Users application
board.
The microSD socket is a latch type, so it is accessible
from the top, rather than a push/push or push/pull
style which is accessible from the side. A slot can be
routed in the Users application board so this is
accessible, if required.
If an external antenna is being used, the antenna can
also run down the plastic channel next to the 10 way
FFC cable, not affecting the Users Application Board, if
fitted.
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 8 of 22 www.4dsystems.com.au
9. Display/Module Precautions
Avoid having to display the same image/object on
the screen for lengthy periods of time. This can
cause a burn-in which is a common problem with
all types of display technologies. Blank the screen
after a while or dim it very low by adjusting the
contrast. Better still; implement a screen saver
feature.
Moisture and water can damage the display.
Moisture on the surface of a powered display
should not cause any problems, however if water
is to enter the display either from the front or
from the rear, or come in contact with the PCB,
damage will certainly occur. Wipe off any
moisture gently or let the display dry before
usage. If using this display module in an
environment where it can get wet, ensure an
appropriate enclosure is used.
Dirt from fingerprint oil and fat can easily stain the
surface of the display. Gently wipe off any stains
with a soft lint-free cloth.
The performance of the display will degrade
under high temperature and humidity. Avoid such
conditions when storing.
Do not tamper with the display flex cable that is
connected to the control board. This may affect
the connection between the display and the
driving circuitry and cause failure.
Displays are susceptible to mechanical shock and
any force exerted on the module may result in
deformed zebra stripes, a cracked display cell and
broken backlight
Always use the mounting holes on the module's
corner plates to mount the display where
possible.
Display modules have a finite life, which is
typically dictated by the display itself, more
specifically the backlight. The backlight contains
LED’s, which fade over time. In the Specifications
section is a figure for the typical life of the display,
and the criteria are listed.
Resistive Touch model features a touch sensitive
film over the display which is sensitive to
pressure. Take note when mounting the display
module in an enclosure that pressure is not
applied to the surface of the display by the
enclosure, or false touches will occur, or the touch
will simply not function at all.
10. Hardware Tools
The following hardware tools are required for full
control of the gen4 IoD Display Modules.
10.1. Programming Adaptor
The 4D Systems Universal Programming Adaptor (4D-
UPA) is an essential hardware tool to program,
customise and test the gen4-IoD Display Module.
The 4D - UPA is used to program the IoD via
Workshop4 and the Arduino IDE. It even serves as an
interface for communicating serial data to the PC.
The 4D - UPA is available from 4D Systems website,
www.4dsystems.com.au
Please note, the 4D-UPA can be used as a simple
interface to power the IoD or to connect to other serial
devices.
The 4D - UPA features an Auto-Reset circuit (credit –
NodeMCU), but also features Reset and Flash buttons,
for flexibility.
Alternatively, other programming devices could be
used, including programming from a host controller.
Please refer to the ESP8266 datasheet for more
options on programming this SoC.
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 9 of 22 www.4dsystems.com.au
11. Internal / External Antenna
The gen4-IoD is capable of using either the on-board
ceramic chip antenna, or using an external antenna
connecting using the U.FL connector on the PCB.
By default, the on-board ceramic chip antenna is used,
and SB2 (Solder Bridge 2) is shorted, enabling contact
of the LBA pin to the ceramic chip antenna.
If the external antenna is desired instead, SB1 (Solder
Bridge 1) needs to be shorted, using a small blob of
solder via a soldering iron, and SB2 needs to be de-
soldered. SB2 ‘can’ be left connected if required,
however WiFi performance may be impeded to some
degree, due to two antennas being connected at the
same time, however it should still work in most
situations.
12. FCC Cable Orientation
The 10-way FFC cable connects to the gen4-IoD and
the 4D-UPA, the same way. Both feature Bottom
Contact FFC connectors, meaning the FFC cable
connects into the board with the contacts facing
down, blue side facing up.
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 10 of 22 www.4dsystems.com.au
13. Programming the IoD
There are two IDE’s available to program the IoD.
Using the Arduino IDE, or using the 4D Systems
Workshop4 IDE.
Using the Workshop4 IDE provides additional
graphical benefits over using the Arduino IDE,
however the Worskhop4 IDE is only Windows based
(unless via a Virtual Machine).
If using the Workshop4 IDE, Workshop4 installation
will call the Arduino IDE in the background for
programming the board (handled automatically and
invisibly). Some minor setup is required to install the
board into the Arduino IDE, using the Board Manager
and installing the JSON file. See the following section.
If the Workshop4 IDE is not going to be used at all,
then the IoD board needs to be added into the Arduino
IDE in the same way, using the Arduino Board
Manager. More details below.
13.1. Arduino IDE
The gen4-IoD is Arduino IDE compatible. The IoD can
be directly programmed via Arduino IDE like any other
ESP8266/Arduino module.
The gen4-IoD must be added to the Arduino IDE. This
is typically done using the Boards Manager.
Advanced users who wish to use the Github main
repository are welcome to, which also supports the
gen4-IoD, however is not classed as Stable by the
ESP8266 community so should be used with caution.
The easiest way to install the gen4-IoD into the
Arduino IDE, is by installing the Stable release JSON file
provided by the ESP8266 community. This is done by
starting up the Arduino IDE, going File, Preferences,
and entering the following line into the ‘Additional
Boards Manager URLs’ field. If you already have a
listing in there, simply add a comma after the last one,
and paste this new URL in at the end:
http://arduino.esp8266.com/stable/packa
ge_esp8266com_index.json
Click OK on the preferences window to close it.
Go up to Tools, Board, and click on Board Manager.
Once it loads, scroll down to the bottom, and you
should see a listing for esp8266. Click on it, and then
on install, and install the latest version.
Once this has been completed, click Close, and then
shut down the Arduino IDE.
The Arduino IDE should then be set up to start using
the gen4-IoD.
NOTE: For advanced users, the Github repository for
the Arduino esp8266 core (non-stable version), is not
classed as being stable by Espressif. Use at your own
risk.
https://github.com/esp8266/Arduino
Follow the instructions on their Github readme.
NOTE: The ESP8266 Core is not maintained or created
by 4D Systems. It belongs to esp8266.com
13.2. Additional Libraries
Check out the GFX4d library from the 4D Systems
github page: https://github.com/4dsystems
This contains the library specifically for the gen4-IoD
and some demo applications.
This library can be downloaded and added to the
Arduino IDE, like any normal library.
Navigate to https://github.com/4dsystems/GFX4d
and download the repository, using the
download/clone button. Save the zip file to your PC.
Open the Arduino IDE, and go to Sketch – Include
Library – Add Zip Library
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 11 of 22 www.4dsystems.com.au
The library will then be installed, and will be available
for you to use. There are example applications
available in the examples folder.
13.3. 4D Systems – Workshop 4 IDE
Workshop 4 is a comprehensive software IDE that
provides an integrated software development
platform for all 4D Systems Intelligent Display
Modules, including the IoD.
Workshop4 allows rapid development of applications,
and on the gen4- IoD can take full advantage of the
available extended graphics functions.
The Workshop IDE can create/edit Arduino code and
verify/compile and then load the code into the IoD’s
ESP8266 processor, without having to use the Arduino
IDE directly. It makes it possible to create both simple
and complex graphical user interfaces.
When Workshop4 is started, it presents the User with
a screen to start a new project, or to load a project.
Upon selecting to start a new project, another screen
is displayed, presenting the wide range of 4D Systems
products available to be programmed or configured by
the Workshop4 IDE, of which there is the gen4-IoD-
24T, gen4-IoD-28T and gen4-IoD-32T.
The Workshop4 IDE can be used to program the gen4-
IoD, just as the Arduino IDE does. This is possible due
to the integration of the Arduino compiler via the
Arduino IDE, which allows Arduino sketches to be
written and compiled from within the Workshop4 IDE,
which then provides WS4 the benefit of adding
graphical widgets and features to the gen4-IoD, which
would otherwise not be available when using the
Arduino IDE.
If you use the Workshop4 IDE, you can program the
gen4-IoD module and have the opportunity to create
graphics which you can call using Arduino code via the
GFX4d library. Many options are possible.
Note: Workshop requires the Arduino IDE to be
installed as Workshop calls the Arduino IDE for
compiling the Arduino sketches. The Arduino IDE
however is not required to be opened or modified to
program the gen4-IoD, once it has been set up. Please
follow the steps found in the previous section to install
and add the gen4-IoD to the Arduino IDE, prior to
installing the Workshop4 IDE.
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 12 of 22 www.4dsystems.com.au
14. Starter Kit
4D Systems highly recommends all first-time buyers of
4D Systems’ displays, to purchase the Starter Kit when
purchasing their first 4D Systems display solution.
The Starter Kit provides all the hardware that is
required to get the User up and running.
Not all development environments and features will
be needed by every User. However, by purchasing the
display solution in a Starter Kit allows you to take full
advantage of all of the features of the 4D Systems
Display Solution and try out each of the 4D Woskshop4
Environments prior to settling with the preferred
feature-set.
Starter Kits typically include:
gen4 IoD Display Module
4D-UPA
150mm 10-way FFC cable for connecting
gen4 display to 4D - UPA
4GB micro-SD Card
Please refer to the 4D Systems website for current
components included in the Starter Kit, if available.
Simply select the Starter Kit option when purchasing
the chosen display module on the 4D Systems
shopping cart, or from your local distributor.
15. Display Module Numbers
The following is a breakdown on the part
numbers and what they mean.
Example:
gen4-IoD-24T
gen4-IoD-28T
gen4-IoD-32T
gen4 - gen4 Display Family
IoD - IoD (Internet of Displays) Range
24 - Display size (2.4”)
28 - Display size (2.8”)
32 - Display size (3.2”)
T - Resistive Touch
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 13 of 22 www.4dsystems.com.au
16. Mechanical Details – gen4-IoD 2.4’’
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 14 of 22 www.4dsystems.com.au
17. Mechanical Details – gen4-IoD 2.8’’
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 15 of 22 www.4dsystems.com.au
18. Mechanical Details – gen4-IoD 3.2
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 16 of 22 www.4dsystems.com.au
19. Mechanical Details - 4D – Universal Programming Adaptor
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 17 of 22 www.4dsystems.com.au
20. Schematic Details – gen4-IoD Display
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 18 of 22 www.4dsystems.com.au
21. Schematic Details - 4D – Universal Programming Adaptor
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 19 of 22 www.4dsystems.com.au
22. Specifications
ABSOLUTE MAXIMUM RATINGS
Operating ambient temperature ................................................................................................... -20°C to +70°C
Storage temperature .......................................................................................................................... -30°C +80°C
Voltage on any digital input pin with respect to GND ....................................................................... -0.3V to 6.0V
Voltage on VCC with respect to GND ................................................................................................. -0.3V to 6.0V
Maximum current sunk/sourced by any pin .............................................................................................. 12.0mA
NOTE: Stresses above those listed here may cause permanent damage to the device. This is a stress rating only
and functional operation of the device at those or any other conditions above those indicated in the
recommended operation listings of this specification is not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.
Operating ambient temperature ................................................................................................... -20°C to +70°C
RECOMMENDED OPERATING CONDITIONS
Parameter
Conditions
Min
Typ
Max
Units
Supply Voltage (VCC)
Stable external supply required
4.0
5.0
5.5
V
Operating Temperature
-10
--
+60
°C
Input Low Voltage
3.3V, all pins
-0.3
--
0.25VCC
V
Input High Voltage
GPIO0, GPIO16, and RX Pins
0.7VCC
--
3.3
V
Output Low Voltage
--
--
0.1VCC
V
Output High Voltage
0.8VCC
--
--
V
GLOBAL CHARACTERISTICS BASED ON OPERATING CONDITIONS
Parameter
Conditions
Min
Typ
Max
Units
Supply Current (ICC)
gen4-IoD-24T – Average, not Peak
--
200
--
mA
gen4-IoD-28T – Average, not Peak
--
200
--
mA
gen4-IoD-32T – Average, not Peak
--
220
--
mA
Display Endurance
Hours of operation, measured to
when display is 50% original
brightness
30000
--
--
H
Touch Screen Endurance
(Resistive Touch)
Number of touches/hits with a
12.5mm tip at a rate of 2x per
second with 250gf force
--
1M
--
Touches
Slide stylus on screen, 100gf force,
60mm/s speed with a 0.8mm
polyacetal tip stylus pen
--
100K
--
Slides
Touch Screen Transparency
Resistive Touch
82
--
--
%
Touch Screen Operational
Force (Resistive Touch)
Only use Finger or Stylus, do not
use anything sharp or metal
20
--
100
Gf
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 20 of 22 www.4dsystems.com.au
LCD DISPLAY INFORMATION
Parameter
Conditions
Specification
Display Type
TFT Transmissive LCD
Display Size
gen4-IoD-24T
2.4” Diagonal
gen4-IoD-28T
2.8” Diagonal
gen4-IoD-32T
3.2” Diagonal
Display Resolution
240 x 320 (Portrait Viewing)
Display Brightness
gen4-IoD-24T
182 cd/m2
gen4-IoD-28T
140 cd/m2
gen4-IoD-32T
160 cd/m2
Display Contrast Ratio
Typical (2.4”, 2.8”)
250:1
Typical (3.2”)
500:1
Display Viewing Angles
Above Centre
35 Degrees
Below Centre
55 Degrees
Left of Centre
55 Degrees
Right of Centre
55 Degrees
Display Viewing Direction
6 o’clock Display
(Optimal viewing is from below when in
Portrait mode)
Display Backlighting
gen4-IoD-24T
1x4 Parallel LED’s
gen4-IoD-28T
1x4 Parallel LED’s
gen4-IoD-32T
1x6 Parallel LED’s
Pixel Pitch
gen4-IoD-24T
0.153 x 0.153mm (Square pixels)
gen4-IoD-28T
0.18 x 0.18mm (Square pixels)
gen4-IoD-32T
0.2025 x 0.2025mm (Square pixels)
Pixel Density
Number of pixels in 1 row in
25.4mm
166 DPI/PPI
141 DPI/PPI
127 DPI/PPI
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 21 of 22 www.4dsystems.com.au
23. Hardware Revision History
24. Datasheet Revision History
Revision
Number
Date
Description
1.4
29/03/2017
Initial Public Release Version
Revision
Number
Date
Description
1.0
12/06/2017
Initial Public Release
1.1
28/02/2019
Format Change, Arduino Instruction update
1.2
05/03/2019
Cosmetic Changes to gen4 Datasheet range
gen4-Internet of Displays Series
gen4-IoD-24T/28T/32T Page 22 of 22 www.4dsystems.com.au
25. Legal Notice
Proprietary Information
The information contained in this document is the property of 4D Systems Pty. Ltd. and may be the subject of patents
pending or granted, and must not be copied or disclosed without prior written permission.
4D Systems endeavours to ensure that the information in this document is correct and fairly stated but does not
accept liability for any error or omission. The development of 4D Systems products and services is continuous and
published information may not be up to date. It is important to check the current position with 4D Systems. 4D
Systems reserves the right to modify, update or makes changes to Specifications or written material without prior
notice at any time.
All trademarks belong to their respective owners and are recognised and acknowledged.
Disclaimer of Warranties & Limitation of Liability
4D Systems makes no warranty, either expressed or implied with respect to any product, and specifically disclaims all
other warranties, including, without limitation, warranties for merchantability, non-infringement and fitness for any
particular purpose.
Information contained in this publication regarding device applications and the like is provided only for your
convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with
your specifications.
Images and graphics used throughout this document are for illustrative purposes only. All images and graphics used
are possible to be displayed on the 4D Systems range of products, however the quality may vary.
In no event shall 4D Systems be liable to the buyer or to any third party for any indirect, incidental, special,
consequential, punitive or exemplary damages (including without limitation lost profits, lost savings, or loss of
business opportunity) arising out of or relating to any product or service provided or to be provided by 4D Systems,
or the use or inability to use the same, even if 4D Systems has been advised of the possibility of such damages.
4D Systems products are not fault tolerant nor designed, manufactured or intended for use or resale as on line control
equipment in hazardous environments requiring fail – safe performance, such as in the operation of nuclear facilities,
aircraft navigation or communication systems, air traffic control, direct life support machines or weapons systems in
which the failure of the product could lead directly to death, personal injury or severe physical or environmental
damage (‘High Risk Activities’). 4D Systems and its suppliers specifically disclaim any expressed or implied warranty
of fitness for High Risk Activities.
Use of 4D Systems’ products and devices in 'High Risk Activities' and in any other application is entirely at the buyer’s
risk, and the buyer agrees to defend, indemnify and hold harmless 4D Systems from any and all damages, claims, suits,
or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any 4D Systems
intellectual property rights.
26. Contact Information
For Technical Support: www.4dsystems.com.au/support
For Sales Support: sales@4dsystems.com.au
Website: www.4dsystems.com.au
Copyright 4D Systems Pty. Ltd. 2000-2019.