Introducing Mainboard
2-15
The mainboard offers two 9-pin male DIN connectors as serial ports. 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 the
connector.
Serial Port
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 Pin Definition
9-Pin Male DIN Connector
1 2 3 4 5
6 7 8 9
1 2
COM2
9
