92hd81 Integrated Device Technology, 92hd81 Datasheet - Page 18

• Manufacturer Part Number: 92hd81
• Description: Single Chip Pc Audio System
• Manufacturer: Integrated Device Technology

SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
92HD81
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
2.3.
2.4.
2.5.
Analog Mixer
ADC Multiplexers
Power Management
Digital Microphone inputs
ADC Volume Control
Analog Clocks
SPDIF Outputs
Mixer Volumes
VrefOut Pins
Analog mixer
Input Boost
GPIO pins
Ref ADC
Function
The mixer supports independent gain (-34.5 to +12dB in 1.5dB steps) on each input as well as inde-
pendent mutes on each input. The following inputs are available:
The Yangtze Series codec 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 preselec-
tion of one of 7 possible inputs:
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) , all con-
verter widgets, and all pin complexes support the power state verb F05/705. Converter widgets are
active in D0 and inactive in D1-D3.
The following table describes what functionality is active in each power state.
DAC
ADC
D2S
•
•
•
•
•
•
•
•
•
•
•
Port A
Port C
Port E
Port F
Port A
Port C
Port E
Port F
Mixer Output
DMIC 0
DMIC 1
On
On
On
On
On
On
On
On
D0
On
On
On
On
On
Table 5. Power Management
D1
Off
Off
Off
Off
Off
Off
On
On
On
Off
On
On
On
1
18
On(idle)
Off
Off
Off
Off
Off
Off
Off
Off
D2
Off
On
Off
Off
On(idle)
On
Off
Off
Off
Off
Off
Off
Off
Off
D3
Off
Off
Off
5
5
92HD81
D3cold
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
Off
Specific D4
Vendor
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
Off
PC AUDIO
SpecificD5
V 0.97 01/09
Vendor
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off