21
Installing the Motherboard
Pin
Signal Name
AUDIO1: Front Panel Audio header
This header allows the user to install auxiliary front-oriented microphone and line-out ports
for easier access.
Pin
Signal Name
Function
1
AUD_MIC
Front Panel Microphone input signal
2
AUD_GND
Ground used by Analog Audio Circuits
3
AUD_MIC_BIAS Microphone Power
4
AUD_VCC
Fi5V used by Analog Audio Circuits
5
AUD_F_R
Right Channel audio signal to Front Panel
6
REVD
Reserved
7
REVD
Reserved
8
Key
No Pin
9
AUD_F_L
Left Channel Audio signal to Front Panel
10
REVD
Reserved
CD_IN1: CD Audio Input header
Pin
Signal Name
Function
1
CD in_L
CD In left channel
2
GND
Ground
3
GND
Ground
4
CD in_R
CD In right channel
Connecting Optional Devices
Refer to the following for information on connecting the motherboard’s optional devices:
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