18
COM Port Headers
(10-pin COM1)
(see p.8 No. 23)
(10-pin COM2)
(see p.8 No. 21)
(10-pin COM3)
(see p.8 No. 19)
(10-pin COM4)
(see p.8 No. 17)
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#
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/COM2 port. Please refer to
below table for the pin definition. In addition, COM1/COM2 port (RS232/422/485) can
be adjusted in BIOS setup utility > Advanced Screen > Super IO Configuration. You
may refer to page 31 for details.
COM1/COM2 Port Pin Definition
Buzzer Header
(2-pin BUZZ1)
(see p.8 No. 4)
1
+
5
V
S
P
K
R
Chassis Intrusion Headers
This motherboard supports
(2-pin CI1, CI2)
CASE OPEN detection feature
(see p.8 No. 29)
that detects if the chassis cover
has been removed. This feature
requires a chassis with chassis
intrusion detection design.
