User`s manual

SBC81206 PICMG 1.0 SBC User’s Manual
Jumpers and Connectors
11
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
Signal Name
Pin #
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