92HD73C データシートの表示（PDF） - Integrated Device Technology
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92HD73C Datasheet PDF : 252 Pages
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92HD73C
SIX CHANNEL HD AUDIO CODEC, PREMIUM WLP 3/4 COMPLIANT
PC AUDIO
1.4.7.
Input Multiplexers
92HD73C implements 4 port input multiplexers. These multiplexers allow a preselection of one of
four possible inputs:
Inport0_Mux
Port A
Port B
Port D
Port F
Inport1_Mux
Port A
Port E
Port G
Port H
Inport2_Mux
Port B
Port C
Port G
Port H
Table 6. Input Multiplexers
Inport3_mux
DAC 0
DAC 1
DAC 2
DAC 3
1.4.8.
ADC Multiplexers
92HD73C implements 2 ADC input multiplexers. These multiplexers incorporate the ADC record
gain function (0 to +22.5dB gain in 1.5dB steps) as an output amp and allow a preselection of one of
12 possible inputs:
• DMIC 0
• DMIC 1
• Mixer output
• CD input
• Ports A - H
1.4.9.
Power Management
The HD Audio specification defines power states, power state widgets, and power state verbs.
Power management is implemented at several levels. The Audio Function Group (AFG) and all con-
verter widgets support the power state verb F05/705 (as well as the pin widget associated with pin
47.) Converter widgets are active in D0 and inactive in D1-D3.
The following table describes what functionality is active in each power state supported by the AFG.
Function
SPDIF Outputs
SPDIF Inputs
Digital Microphone inputs
DAC
D2S
ADC
ADC Volume Control
Ref ADC
Analog Clocks
GPIO pins
VrefOut Pins
D0
D11
D2
On
Off
Off
On
Off
Off
On
Off
Off
On
Off
Off
On
Off
Off
On
Off
Off
On
Off
Off
On
Off
Off
On
Off
Off
On
On
On
On
On
Off
Table 7. Function state vs. AFG power state
D3
vendor specific
Off
-
Off
-
Off
-
Off
-
Off
-
Off
-
Off
-
Off
-
Off
-
On
-
Off
-
17
SIX CHANNEL HD AUDIO CODEC, PREMIUM WLP 3/4 COMPLIANT
92HD73C
V 1.3 08/11
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