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COM Port Headers
(10-pin COM1)
(see p.8 No. 22)
(10-pin COM2)
(see p.8 No. 20)
(10-pin COM3)
(see p.8 No. 18)
(10-pin COM4)
(see p.8 No. 17)
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 31 for details.
PIN
Buzzer Header
(2-pin BUZZ1)
(see p.8 No. 1)
Chassis Intrusion Headers
(2-pin CI1, CI2)
(see p.8 No. 28)
Signal
PIN
PIN
Name
10
DUMMY
8
9
DUMMY
7
COM1 Port Pin Definition
RS232
1
DCD
2
RXD
3
TXD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
NA/+5V/+12V
GND
Signal
2
1
Signal
Signal
PIN
Name
Name
CCTS#
6
DDSR#
RRTS#
5
GND
RS422
TX-
RX+
TX+
RX-
GND
N/A
N/A
N/A
N/A
This motherboard supports
CASE OPEN detection feature
1
that detects if the chassis cover
has been removed. This feature
requires a chassis with chassis
intrusion detection design.
18
Signal
Signal
PIN
PIN
Name
Name
4
DDTR#
2
RRXD
3
TTXD
1
DDCD#
RS485
RTX-
N/A
RTX+
N/A
GND
N/A
N/A
N/A
N/A
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