User Manual

Embedded Box TKS-G50-QM77
Chapter 2 Quick Installation Guide 2-25
2.13 Digital I/O Connector (CN12)
This connector offers 4-pair of digital I/O function.
BIOS using the I2C Bus to read/write internal DIO registers and the Serial Bus
address is 0xA06.
The pin definitions are illustrated below:
Pin Signal Pin Signal
1 DIO_IN0 2 DIO_IN1
3 DIO_IN2 4 DIO_IN3
5 DIO_OUT0 6 DIO_OUT1
7 DIO_OUT2 8 DIO_OUT3
9 +5 Volt. 10 Ground
Note
: The max. rating of Pin 1 ~ Pin 8 is 5V@8mA
The max. rating of Pin 9 is 5V@0.5A
BIOS Setting
Conne
ctor
Definition
Address
(Register)
IT8728 GPIO Setting
GPIO1/DIO_IN0 Pin 1
Bit 0@A06h
U18 Pin 109 (GPIO 70)
GPIO2/DIO_IN1 Pin 2 Bit 1@A06h U18 Pin 110 (GPIO 71)
GPIO3/DIO_IN2 Pin 3 Bit 2@A06h U18 Pin 111 (GPIO 72)
GPIO4/DIO_IN3 Pin 4 Bit 3@A06h U18 Pin 112 (GPIO 73)
GPIO5/DIO_OUT0 Pin 5
Bit 0@A07h
U18 Pin 113 (GPIO 74)
GPIO6/DIO_OUT1 Pin 6 Bit 1@A07h U18 Pin 114 (GPIO 75)
GPIO7/DIO_OUT2 Pin 7 Bit 2@A07h U18 Pin 115 (GPIO 76)
GPIO8/DIO_OUT3 Pin 8 Bit 3@A07h U18 Pin 116 (GPIO 77)