SBC81206 PICMG1.0
SBC User’s Manual
10
Board and Pin Assignments
2.4.1
COM1, COM2 Port Connectors
The serial interface for the board consists of COM1 port (COM1) support for RS-232 and
COM2 (COM2) for RS-232/RS422/RS485.
Please refer to the RS-232 pin assignment as listed below:
Pin Signal
Pin
Signal
1
Data Carrier Detect (DCD)
2
Data Set Ready (DSR)
3
Receive Data (RXD)
4
Request to Send (RTS)
5
Transmit Data (TXD)
6
Clear to Send (CTS)
7
Data Terminal Ready (DTR) 8
Ring Indicator (RI)
9
Ground (GND)
10
Ground (GND)
COM2 Serial Port 10-pin (Box-header) Connector Pin Assignment list
Pin
Signal Name
RS-422
RS-485
1
TX-
DATA-
2
No connector
No connector
3
TX+
DATA+
4
No connector
No connector
5
RX+
No connector
6
No connector
No connector
7
RX-
No connector
8
No connector
No connector
9
GND
GND
10
GND
GND
