Chapter 2
2-10
Serial Port Connector: COM A & COM B
The mainboard offers two 9-pin male DIN connectors for serial port COM
A and COM B. The ports are 16550A high speed communication ports that
send/receive 16 bytes FIFOs. You can attach a serial mouse or other serial
devices directly to them.
9-Pin Male DIN Connectors
1 2 3 4 5
6 7 8 9
PIN
SIGNAL
DESCRIPTION
1
DCD
Data Carry Detect
2
SIN
Serial In or Receive Data
3
SOUT
Serial Out or Transmit Data
4
DTR
Data Terminal Ready)
5
GND
Ground
6
DSR
Data Set Ready
7
RTS
Request To Send
8
CTS
Clear To Send
9
RI
Ring Indicate
Pin Definition
RJ-45 LAN Jack (Optional)
The mainboard provides one standard RJ-45 jack for connection to Local
Area Network (LAN). You can connect a network cable to the LAN jack.
RJ-45 LAN Jack
Pin Definition
PIN
SIGNAL
DESCRIPTION
1
TDP
Transmit Differential Pair
2
TDN
Transmit Differential Pair
3
RDP
Receive Differential Pair
4
NC
Not Used
5
NC
Not Used
6
RDN
Receive Differential Pair
7
NC
Not Used
8
NC
Not Used
