User`s manual
SBC81203 LGA775 SBC User’s Manual
Jumpers and Connectors
11
2.4.2 Audio Connector (CN1)
CN1 is a 10-pin connector to support the audio interface.
Pin Signal Pin Signal
1 MIC-IN 2 GND
3 Line In L 4 GND
5 Line In R 6 GND
7 Audio Out L 8 GND
9 Audio Out R 10 GND
2.4.3 Serial Port Interface Connectors (COM1, COM2)
The serial interface for the board consists of COM1 port (COM1) and
COM2 (COM2) supports RS-232/RS-422/RS-485.
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 NC
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