
2-10
MS-6703 M-ATX Mainboard
The back panel provides the following connectors:
Back Panel
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
Serial Port Connectors: COM A & COM B
The mainboard offers two 9-pin male DIN connectors as serial ports
COM A and COM B. Both ports are 16550A high speed communication
ports that send/receive 16 bytes FIFOs. You can attach a serial mouse or other
serial device directly to them.
Pin Definition
9-Pin Male DIN Connector
COM A & COM B
1 2 3 4 5
6 7 8 9
Mouse
Keyboard
USB
Parallel
COM A COM B
L-out
L-in
MIC
IEEE1394
Port
LAN
USB
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