Intel Desktop Board DX79SI Technical Product Specification
50
2.2.2.1
Signal Tables for the Connectors and Headers
Table 13. Front Panel Audio Header for Intel HD Audio
Pin Signal
Name
Description
1
PORT_1L
Analog Port 1 – left channel (microphone)
2 GND
Ground
3
PORT_1R
Analog Port 1 – right channel (microphone)
4
PRESENCE#
Active low signal that signals BIOS that an Intel HD Audio
dongle is connected to the analog header. PRESENCE#=0
when an Intel HD Audio dongle is connected
5
PORT_2R
Analog Port 2 – right channel (headphone)
6 SENSE1_RETURN
Jack
detection
return for front panel (JACK1)
7
SENSE_SEND
Jack detection sense line from the Intel HD Audio CODEC
jack detection resistor network
8 KEY
No
pin
9
PORT_2L
Analog Port 2 – left channel (headphone)
10 SENSE2_RETURN
Jack
detection
return for front panel (JACK2)
Table 14. Front Panel Audio Header for AC ’97 Audio
Pin Signal
Name
Description
1
MIC
Front panel microphone input signal (biased when supporting
stereo microphone)
2
AUD_GND
Ground used by analog audio circuits
3
MIC_BIAS
Microphone power/additional MIC input for stereo
microphone support
4
PRESENCE#
Active low signal that signals BIOS that an Intel HD Audio
dongle is connected to the analog header. PRESENCE#=0
when an Intel HD Audio dongle is connected.
5
FP_OUT_R
Right channel audio signal to front panel (headphone drive
capable)
6
AUD_GND
Ground used by analog audio circuits
7 RESERVED
Reserved
8 KEY
No
pin
9
FP_OUT_L
Left channel audio signal to front panel (headphone drive
capable)
10
AUD_GND
Ground used by analog audio circuits
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