Connecting Optional Devices - ECS L4IBMG2 Manual

L4IBMG2 / L4IBMGL2 V1.0b

Connecting Optional Devices

Refer to the following for information on connecting the mainboard'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
4 AUD_VCC
5 AUD_FPOUT_R
6 AUD_RET_R
7 HP_ON
8 KEY
9 AUD_FPOUT_L
10 AUD_RET_L
Function
Front Panel Microphone input signal
Ground used by Analog Audio Circuits
Microphone Power
Filtered +5 V used by Analog Audio Circuits
Right Channel Audio signal to Front Panel
Right Channel Audio signal to Return from
Front Panel
Reserved for future use to control Head-
phone Amplifier
No Pin
Left Channel Audio signal to Front Panel
Left Channel Audio signal Return from
Front Panel
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