It8712 gpio – AAEON PCM-9452 User Manual
Page 33
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C o m p a c t B o a r d
P C M - 9 4 5 2
Chapter 2 Quick Installation Guide
2-20
2.35 COM Port 3 Connector (CN20)
Pin Signal
Pin Signal
1
DCDC
2
RXC
3
TXC
4
DTRC
5
Ground
6
DSRC
7
RTSC
8
CTSC
9
RIC
10
N/C
2.36 Digital I/O Connector (CN22)
Pin Signal
Pin Signal
1
Port 1
2
Port 2
3
Port 3
4
Port 4
5
Port 5
6
Port 6
7
Port 7
8
Port 8
9
+5 Volt.
10
Ground
Mapping Table
(Digital I/O Address is 801H)
BIOS
Setting
Connector
Definition
Address
IT8712 GPIO
Setting
Port 8
CN22 Pin 8
Bit 7
U22 Pin 20 (GPIO 27)
Port 7
CN22 Pin 7
Bit 6
U22 Pin 21 (GPIO 26)
Port 6
CN22 Pin 6
Bit 5
U22 Pin 22 (GPIO 25)
Port 5
CN22 Pin 5
Bit 4
U22 Pin 23 (GPIO 24)
Port 4
CN22 Pin 4
Bit 3
U22 Pin 24 (GPIO 23)
Port 3
CN22 Pin 3
Bit 2
U22 Pin 25 (GPIO 22)
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