20
Installing the Motherboard
SPDIFO1: SPDIF out header
This is an optional header that provides an S/PDIF (Sony/Philips Digital Interface) output
to digital multimedia device through optical fiber or coaxial connector.
Pin
Signal Name
Function
1
SPDIF
SPDIF digital output
2
+5VA
5V analog Power
3
Key
No pin
4
GND
Ground
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
AUD_RET_R
Right Channel Audio signal to Return from Front Panel
7
REVD
Reserved
8
Key
No Pin
9
AUD_F_L
Left Channel Audio signal to Front Panel
10
AUD_RET_L
Left Channel Audio signal to Return from Front Panel
AUXIN1: Auxiliary In header
This connector is an additional line-in audio connector. It allows you to attach a line-in
cable when your rear line-in jack is set as line out port for 4-channel function.
Pin
Signal Name
Function
1
AUX_L
AXU In left channel
2
GND
Ground
3
GND
Ground
4
AUX_R
AXU In right channel
CD-in: 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
