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COM Port Headers
(10-pin COM1~4)
(see p.16 No. 24)
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 28 for details.
Front Panel Audio Header
(9-pin HD_AUDIO1)
(see p.16 No. 27)
24
1
2
Signal
PIN
Name
1
DDCD#
2
RRXD
COM1 Port Pin Definition
PIN
1
2
3
4
5
6
7
8
9
NA/+5V/+12V
GND
1
MIC2_R
MIC2_L
1. High Definition Audio supports Jack Sensing, but the panel wire on
the chassis must support HDA to function correctly. Please follow the
instruction in our manual and chassis manual to install your system.
2. If you use AC'97 audio panel, please install it to the front panel audio
header as below:
A. Connect Mic_IN (MIC) to MIC2_L.
B. Connect Audio_R (RIN) to OUT2_R and Audio_L (LIN) to OUT2_L.
C. Connect Ground (GND) to Ground (GND).
D. MIC_RET and OUT_RET are for HD audio panel only. You don't
need to connect them for AC'97 audio panel.
E. To activate the front mic.
Go to the "FrontMic" Tab in the Realtek Control panel. Adjust
"Recording Volume".
Signal
Signal
PIN
PIN
Name
Name
3
TTXD
5
GND
4
DDTR#
6
DDSR#
RS232
RS422
DCD
TX-
RXD
RX+
TXD
TX+
DTR
RX-
GND
GND
DSR
N/A
RTS
N/A
CTS
N/A
N/A
This is an interface for front
PRESENCE#
panel audio cable that allows
MIC_RET
OUT_RET
convenient connection and
control of audio devices.
OUT2_L
J_SENSE
OUT2_R
Signal
PIN
PIN Signal Name
Name
7
RRTS#
9
COM_PWR
8
CCTS#
10
DUMMY
RS485
RTX-
N/A
RTX+
N/A
GND
N/A
N/A
N/A
N/A
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