92HD81 Datasheet, PDF (18/279 Pages) Integrated Device Technology – SINGLE CHIP PC AUDIO SYSTEM

92HD81
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
Function
D0
SPDIF Outputs
On
Digital Microphone inputs
On
DAC
On
D2S
On
ADC
On
ADC Volume Control
On
Ref ADC
On
Analog Clocks
On
GPIO pins
On
VrefOut Pins
On
Input Boost
On
Analog mixer
On
Mixer Volumes
On
Analog PC_Beep
On
Digital PC_Beep
On
Lo/HP Amps
On
Capless HP Amps
On
BTL Amp
On
VAG amp
On
Port Sense
On
Reference Bias generator
On
Reference Bandgap core
On
HD Audio-Link
On
D1¹
D2
D3
D3cold
Vendor
Vendor
Specific D4 SpecificD5
On
On(idle) On(idle)⁵
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
On
On⁵
On
On
Off
On
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
On
On
On
Off
Off
Off
On
On
On⁵
Off
Off
Off
On
On _{Low Drive}² _{Low Drive}² _{Low Drive}²
Off
On
On _{Low Drive}² _{Low Drive}² _{Low Drive}²
Off
On
On _{Low Drive}²
Off
Off
Off
On
On _{Low Drive}³ Low Drive Low Drive
Off
On
On
On⁴
Off
Off
Off
On
On
On
On
On
Off
On
On
On
On
On
Off
On
On
On⁵
Limited
Off
Off
Table 5. Power Management
1. No DAC or ADC streams are active. Analog mixing and loop thru are supported.
2. VAG is kept active when ports are disabled or in D3/D3cold/D4. PC_Beep is supported in D3 but may be attenuated and
distorted depending on load impedance.
3. VAG is always ramped up and down gradually, except in the case of a sudden power removal. VAG is active in D2/D3 but
in a low power state.
4. Both AVDD and DVDD must be available for Port Sense to operate.
5. Not active if BITCLK is not running (Controller in D3), but can signal power state change request (PME)
The D3-default state is available for HD Audio compliance. The programmable values, exposed via
vendor-specific settings, are under IDT Device Driver control for further power reduction. The analog
mixer, line and headphone amps, port presence detect, and internal references may be disabled
using vendor specific verbs. Use of these vendor specific verbs will cause pops.
The default power state for the Audio Function Group after reset is D3.
2.6. AFG D0
The AFG D0 state is the active state for the device. All functions are active if their power state (if they
support power management at their node level) has been set to D0.
IDT CONFIDENTIAL
18
©2009 INTEGRATED DEVICE TECHNOLOGY, INC.
V 0.995 01/11
92HD81