92HD99B Datasheet, PDF (14/225 Pages) Integrated Device Technology – SINGLE CHIP PC AUDIO SYSTEM

92HD99
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
2.3. ADC Multiplexers
The codec implements 2 ADC input multiplexers. These multiplexers incorporate the ADC record
gain function :(-16 to +30dB gain in 1dB steps) as an output amp and allow a preselection of one of
below possible inputs:
• Port A
• Port C
• Port F
• Mixer Output
• DMIC 0
2.4. 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) , 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.
Function
Digital Microphone inputs
DAC
D2S
ADC
ADC Volume Control
Ref ADC
Analog Clocks
GPIO pins
VrefOut Pins
Input Boost
Analog mixer
Mixer Volumes
Analog PC_Beep
Digital PC_Beep
Lo/HP Amps
Cap-less HP Amps
BTL Amp
VAG amp
Port Sense
Reference Bias generator
Reference Bandgap core
HD Audio-Link
D0
D1¹
D2
D3
D3cold
Vendor
Vendor
Specific D4 SpecificD5
On
Off
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
Off
On
On
On
On⁵
On
On
Off
On
On
Off
Off
Off
Off
Off
On
On
Off
Off
Off
Off
Off
On
On
Off
Off
Off
Off
Off
On
On
Off
Off
Off
Off
Off
On
On
On
On
Off
Off
Off
On
On
On
On⁵
Off
Off
Off
On
On
On
Low Drive² Low Drive² Low Drive²
Off
On
On
On
Low Drive² Low Drive² Low Drive²
Off
On
On
On
Low Drive²
Off
Off
Off
On
On
On
Low Drive³ Low Drive Low Drive
Off
On
On
On
On⁴
Off
Off
Off
On
On
On
On
On
On
Off
On
On
On
On
On
On
Off
On
On
On
On⁵
Limited
Off
Off
Table 4. Power Management
1. No DAC or ADC streams are active. Analog mixing and loop thru are supported.
IDT CONFIDENTIAL
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©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
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92HD99