15
* 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 23 for details.
COM1 Port Pin Definition
COM Port Header (RS232/422/485)
(9-pin COM1: see p.8, No. 6)
CCTS#1
RRTS#1
DDSR#1
DDTR#1
RRXD1
GND
TTXD1
DDCD#1
1
RRI#1
PIN Signal
Name PIN
Signal
Name PIN
Signal
Name PIN
Signal
Name PIN
Signal
Name
2
AGND
4
NC
6 LIN1_JD 8 LIN2_JD 10
NC
1 LIN1_L_
IN
3 LIN1_R_
IN
5 LIN2_R_
OUT
7
AGND
9 LIN2_L_
OUT
Front Panel Audio Header
This is an interface for front
(9-pin HD_AUDIO1)
panel audio cable that allows
(see p.8 No. 4)
convenient connection and
control of audio devices.
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”.
PIN
RS232
RS422
RS485
1
DCD, Data Carrier Detect
TX-
RTX-
2
RXD, Receive Data
TX+
RTX+
3
TXD, Transmit Data
RX+
N/A
4
DTR, Data Terminal Ready
RX-
N/A
5
GND
GND
GND
6
DSR, Data Set Ready
N/A
N/A
7
RTS, Request To Send
N/A
N/A
8
CTS, Clear To Send
N/A
N/A
9
N/A
N/A
N/A
