User Manual

19
Installing the Motherboard
Connecting Optional Devices
Refer to the following for information on connecting the motherboard’s optional devices:
IR1: Infrared header
COM2: Onboard serial port header
Connect a serial port extension bracket to this header to add a second serial port to your
system.
1 NDCDC/NDCDD Data Carrier Detect
2 NSINC/NSIND Serial Input
3 NSOUTC/NSOUTD UART B Serial Output
4 NDTRC/NDTRD UART B Data Terminal Ready
5 Ground Ground
6 NDSRC/NDSRD Data Set Ready
7 NRTSC/NRTSD RART B Request to Send
8 NCTSC/NCTSD Clear to Send
9 XNRI3/XNRI4 Ring Indicator
10 Key No pin
Not assigned
2 Key
No pin
Pin Signal Name Function
3 +5V
IR Power
4 GND
Ground
1 Not Assigned
5 IR_TX IrDA serial output
6 IR_RX IrDA serial input
Pin Signal Name Function