Serial Port Interface Connectors (Cn3, Cn6) - AXIOMTEK SHB100 User Manual

SHB100 LGA775 SBC User's Manual
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
1 Data Carrier Detect (DCD)
3 Receive Data (RXD)
5 Transmit Data (TXD)
7 Data Terminal Ready (DTR)
9 Ground (GND)
COM2 Serial Port 10-pin (Box-header) Connector Pin Assignment list
Pin
1
2 No connector
3
4 No connector
5
6 No connector
7
8 No connector
9
10
2.4.7 Internal Mouse/Keyboard Connector (CN20/CN21)
The board provides a keyboard (CN21) and Mouse (CN20) interface with two 5-pin
connectors.
16
Pin
2
4
6
8
10
Signal
RS-422 RS-485
TX- DATA-
No connector
TX+ DATA+
No connector
RX+ No connector
No connector
RX- No connector
No connector
GND GND
GND GND
Clock 1
Data 2
No Connection 3
GND 4
Power
5
Signal
Data Set Ready (DSR)
Request to Send (RTS)
Clear to Send (CTS)
Ring Indicator (RI)
NC
Board and Pin Assignments