20
Installing the Motherboard
CD_IN: Analog Audio Input connector
Pin Signal Name Function
1 CD_L CD In left channel
2 GND Ground
3 GND Ground
4 CD_R CD In right channel
COM: Onboard serial port header
Connect a serial port extension bracket to this header to add a second serial port to
your system.
1 DCDB Data Carrier Detect
2 SINB Serial Input
3 SOUTB UART B Serial Output
4 DTRB UART B Data Ter minal Ready
5 GND Ground
6 DSRB Data Set Ready
7 RTSB RART B Request to Send
8 CTSB Clear to Send
9 RI Ring Indicator
10 Key No pin
Pin Signal Name Function