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COM (Serial) Ports
1 2 3 4 5
COM 1
COM 2
6 7 8 9
COM 1/2:
RS232/422/485
(422/485 opt.)
COM 1 and COM 2 can be configured as RS232, RS422 and RS485 (RS422/RS485 opt.) by
BIOS setting. The pin functions are listed at right. The pin functions of COM ports 1/2 will also
vary according to JP5's and JP2's settings. JP5 and JP2 are used to configure the Serial COM
ports 1/2 to pure RS232 or RS232 with power. Refer to "COM1/COM2 RS232/Power Select" in
this chapter for more information.
COM 3/4/5/6 (opt.) are fixed at RS232. The pin functions are listed at right.
The serial ports are asynchronous communication ports with 16C550A-compatible UARTs that
can be used with modems, serial printers, remote display terminals, and other serial devices.
Connecting External Serial Ports
Your COM port may come mounted on a card-edge bracket. Install the card-edge bracket to
an available slot at the rear of the system chassis then insert the serial port cable to the COM
connector. Make sure the colored stripe on the ribbon cable is aligned with pin 1 of the COM
connector.
BIOS Setting
Configure the serial COM ports in the Advanced menu ("SIO NUVOTON6112D" submenu) of
the BIOS. Refer to the chapter 3 for more information.
Chapter 2 Hardware Installation
Chapter 2
PTN
3460
PTN
3460
COM 3/4/5/6 (opt.): RS232
1
9
2
COM 1/2
RS422 Full Duplex
Pin
RS232
1
DCD-
2
RD
TD
3
DTR-
4
GND
5
DSR-
6
RTS-
7
CTS-
8
RI-
9
COM 3/4/5/6 (opt.)
Pin
Pin Assignment
1
DCD-
2
RD
TD
3
DTR-
4
GND
5
DSR-
6
RTS-
7
CTS-
8
RI-
9
18
RS485
(opt.)
(opt.)
RX+
DATA+
RX-
DATA-
TX+
N.C.
TX-
N.C.
GND
GND
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
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