16
Motherboard User’s Guide
Pin
Signal
Pin
Signal
1
VCC
2
Key
3
NC
4
Signal
Connecting Optional Devices
Refer to the following for information on connecting the motherboard’s optional
devices:
SPK: Speaker Header
Connect the cable from the PC speaker to the SPK header on the motherboard.
Pin
Signal
Pin
Signal
1
DCDB
2
SINB
3
SOUTB
4
DTRB
5
GND
6
DSRB
7
RTSB
8
CTSB
9
RI
10 KEY
COM: Onboard serial port header
Connect a serial port extension bracket to this header to add a second serial port to
your system.
