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IoD Display Module Series
Hardware Overview (IoD-09TH)
microSD Socket
4Mbit Flash
Memory for the
ESP8266
Pin
Symbol
I/O
1
GND
P
2
RX
I
3
TX
O
4
RESET
I
5
5V
P
6
GND
P
7
GPIO16
I/O
8
GPIO12
I/O
9
GPIO14
I/O
10
GPIO0
I/O
11
GPIO13
I/O
12
GPIO2
I/O
I = Input, O = Output, P = Power
© 2017 4D SYSTEMS
ESP8266 SoC
Pin 1
Ceramic chip antenna
PINOUT
Description
Supply Ground.
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 module. This pin is tolerant up to 3.3V levels.
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 module. This pin outputs 3.3V levels.
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.
Main Voltage Supply +ve input pin. Range is 4.0V to 5.5V, nominal 5.0V.
Supply Ground.
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.
This pin is the MISO pin used on the SPI Bus. This pin is tolerant up to 3.3v
levels.
This pin is the SCK pin used on the SPI Bus. This pin is tolerant up to 3.3v levels.
I/O pin. This pin is also used for flash programming. This pin is tolerant up to
3.3v levels. This pin can be used for I2C communications. NOTE: Special Pin
This pin is the MOSI pin used on the SPI Bus. This pin is tolerant up to 3.3v
levels.
I/O pin. This pin is also used for boot selection. This pin is tolerant up to 3.3v
levels. This pin can be used for I2C communications. NOTE: Special Pin.
Page 5 of 22
0.9" TFT LCD
USER I/O – 2x 6way headers
2.54mm (0.1") pitch
www.4dsystems.com.au
IoD-09TH/SM
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