www.perfectron.com
16
Serial Port Pin-Out
PIN
RS232
RS422
RS485
1
DCD
TX-
DATA-
2
RXD#
TX+
DATA+
3
TXD#
RX-
NC
4
DTR
RX+
NC
5
GND
GND
GND
6
DSR
NC
NC
7
RTS
NC
NC
8
CTS
NC
NC
9
RI
NC
NC
Chapter 3: AMI BIOS UTILITY
PIN
DEFINITION
1-2
AT Mode
2-3 ATX Mode(Default)