Chapter 2
2-10
Serial Port Connectors: COM A & COM B
The mainboard offers two 9-pin male DIN connectors as serial port COM
A & COM B (COM B is the header COM2 on the board). 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 connectors.
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
9-Pin Male DIN Connector
1 2 3 4 5
6 7 8 9
VGA DB 15-Pin Connector
One DB 15-pin VGA connector is supplied for connection to a VGA
monitor.
DB 15-Pin Female Connector
5 1
15 11
Analog Video Display Connector (DB-15S)
PIN SIGNAL DESCRIPTION
1 Red
2 Green
3 Blue
4 Not used
5 Ground
6 Ground
7 Ground
8 Ground
9 Power
10 Ground
11 Not used
12 SDA
13 Horizontal Sync
14 Vertical Sync
15 SCL
Pin Definition
COM2 (COM B)
2
4
6
8
1
3
5
7
9
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