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19
Chapter 2 Hardware Installation
Chapter 2
COM (Serial) Port
COM 1: RS232/422/485
2
1
10
9
COM 1 can be selected among RS232, RS422 and RS485 via BIOS setting.
The serial port is asynchronous communication ports with 16C550A-compatible UARTs that can
be used with modems, serial printers, remote display terminals, and other serial devices.
BIOS Setting
Configure the serial port in the “SIO FINTEK81803” submenu of the Advanced menu in the
BIOS. Refer to Chapter 3 for more information.
3
Pin
RS232
RS422 Full Duplex
RS485
1
DCD-
TX-
DATA-
2
RD
TX+
DATA+
3
TD
RX+
N.C.
4
DTR-
RX-
N.C.
5
GND
GND
GND
6
DSR-
N.C.
N.C.
7
RTS-
N.C.
N.C.
8
CTS-
N.C.
N.C.
9
RI-
N.C.
N.C.
10
GND
GND
GND
COM 1
