AXIOMTEK SHB100, User Manual

Page: 22 / 68

SHB100
LGA775 SBC User’s Manual
16 Board and Pin Assignments
2.4.6 Serial Port Interface Connectors (CN3, CN6)
The serial interface for the board consists of COM1 port (CN3) and COM2 (CN6)
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
Pin
Signal
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
2.4.7 Internal Mouse/Keyboard Connector (CN20/CN21)
The board provides a keyboard (CN21) and Mouse (CN20) interface with two 5-pin
connectors.
Clock
Data
No Connection
GND
Power
1
2
5
4
3