S u b C o m p a c t B o a r d G E N E - 9 4 5 5Chapter 2 Quick Installation Guide 2-2337 Ground 38 VSYNC39 BLUE 40 Ground41 DDCDATA 42 RED43 CRT_PLUG#2.34 Digital I/O Connector (CN20)Pin Signal Pin Signal1 Port 1 2 Port 23 Port 3 4 Port 45 Port 5 6 Port 67 Port 7 8 Port 89 +5 Volt. 10 GroundThe pin definitions and registers mapping are illustrated below:Address: 680,682,684HBIOS Setting ConnectorDefinition Address IT8712 GPIOSettingPort 8 @684h CN22 Pin 8 GPIO Set 5 / Bit 2 U9 Pin 9 (GPIO 52)Port 7 @684h CN22 Pin 7 GPIO Set 5 / Bit 1 U9 Pin 10 (GPIO 51)Port 6 @682h CN22 Pin 6 GPIO Set 3 / Bit 7 U9 Pin 11 (GPIO 37)Port 5 @682h CN22 Pin 5 GPIO Set 3 / Bit 6 U9 Pin 12 (GPIO 36)Port 4 @680h CN22 Pin 4 GPIO Set 1 / Bit 4 U9 Pin 31 (GPIO 14)Port 3 @680h CN22 Pin 3 GPIO Set 1 / Bit 3 U9 Pin 32 (GPIO 13)Port 2 @680h CN22 Pin 2 GPIO Set 1 / Bit 2 U9 Pin 33 (GPIO 12)Port 1 @680h CN22 Pin 1 GPIO Set 1 / Bit 1 U9 Pin 34 (GPIO 11)