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Connecting Optional Devices
Refer to the following for information on connecting the motherboard's optional devices:
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
1
AUD_MIC
2
AUD_GND
3
AUD_MIC_BIAS Microphone Power
4
AUD_VCC
5
AUD_F_R
6
AUD_RET_R
7
REVD
8
Key
9
AUD_F_L
10
AUD_RET_L
SPDIFO1: SPDIF out header (Optional)
This is an optional header that provides an S/PDIF (Sony/Philips Digital Interface) output
to digital multimedia device through optical fiber or coxial connector.
Pin
Signal Name
Pin
Signal Name
1
SPDIF
2
+5VA
3
Key
4
GND
Installing the Motherboard
Pin
Signal Name
Function
Front Panel Microphone input signal
Ground used by Analog Audio Circuits
Filtered +5V used by Analog Audio Circuits
Right Channel audio signal to Front Panel
Right Channel Audio signal to Return from Front Panel
Reserved
No Pin
Left Channel audio signal to Front Panel
Left Channel Audio signal to Return from Front Panel
Function
Function
SPDIF digital output
5V analog power
No pin
Ground
23
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