18
COM Port Headers
(10-pin COM1)
(see p.8 No. 21)
(10-pin COM2)
(see p.8 No. 19)
(10-pin COM3)
(see p.8 No. 17)
(10-pin COM4)
(see p.8 No. 15)
1
2
PIN
Signal
Name
PIN Signal
Name PIN
Signal
Name PIN
Signal
Name
PIN Signal
Name
10 DUMMY
8
CCTS#
6
DDSR#
4
DDTR#
2
RRXD
9
DUMMY
7
RRTS#
5
GND
3
TTXD
1
DDCD#
SATA Power Output Connector
(4-pin SATA_PWR1)
(see p.8 No. 11)
+5V
+12V
1
GND
GND
PIN
RS232
RS422
RS485
1
DCD
TX-
RTX-
2
RXD
RX+
N/A
3
TXD
TX+
RTX+
4
DTR
RX-
N/A
5
GND
GND
GND
6
DSR
N/A
N/A
7
RTS
N/A
N/A
8
CTS
N/A
N/A
9
NA/+5V/+12V
N/A
N/A
This motherboard supports RS232/422/485 on COM1 port. Please refer to below
table for the pin definition. In addition, COM1 port (RS232/422/485) can be adjusted
in BIOS setup utility > Advanced Screen > Super IO Configuration. You may refer to
page 29 for details.
COM1 Port Pin Definition
