92hd73d Integrated Device Technology, 92hd73d Datasheet - Page 18

• Manufacturer Part Number: 92hd73d
• Description: Eight Channel Hd Audio Codec
• Manufacturer: Integrated Device Technology

EIGHT CHANNEL HD AUDIO CODEC, PREMIUM WLP 3/4 COMPLIANT
92HD73D
EIGHT CHANNEL HD AUDIO CODEC, PREMIUM WLP 3/4 COMPLIANT
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 D2/D3. Ports may be powered down using vendor specific verbs.
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. BITCLK must be active and both AVDD and DVDD must be available for Port Sense to operate.
5.Vendor specific bit for Ref Top controls VAG generator, Bandgap Reference, and Reference bias generator. Place part into
D3 and power down all ports (using vendor specific verbs) before powering down Ref Top.
6.Obviously not active if BITCLK is not running (Controller in D3).
Reference Bias generator
Reference Bandgap core
Analog PC_Beep
Digital PC_Beep
Mixer Volumes
HD Audio-Link
Analog mixer
Input Boost
Port Sense
Function
HP Amps
VAG amp
Lo Amp
1.4.9.1.
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.
1.4.9.2.
D1 is a lower power mode where all converter widgets are disabled. Analog mixer and port functions
are active.
1.4.9.3.
The D2 state further reduces power by disabling the mixer and port functions. The port amplifiers
and internal references remain active to keep port coupling caps charged and the system ready for a
quick resume to either the D1 or D0 state.
1.4.9.4.
The D3-default state is available for HD Audio compliance. All converters are shut down. Port ampli-
fiers and references are active but in a low power state to prevent pops. Resume times may be
longer than those from D2, but still very fast to meet Intel low power goals.
The traditional use for D3 was as a transitional state before power was removed (D3 cold) before the
system entered into standby, hibernate, or shut-down. To conserve power, Intel now promotes using
D3 whenever there are no active streams or other activity that requires the part to consume full
power. The system remains in S0 during this time. When a stream request or user activity requires
AFG D0
AFG D1
AFG D2
AFG D3
Table 7. Function state vs. AFG power state
D0
On
On
On
On
On
On
On
On
On
On
On
On
18
D1
On
On
On
On
On
On
On
On
On
On
On
On
1
On
On
On
On
On
On
On
On
D2
Off
Off
Off
Off
92HD73D
Low Drive
Low Drive
Low Drive
On
On
D3
Off
Off
Off
Off
On
On
On
4
6
2
2
3
vendor specific
Programmable
Programmable
Programmable
Programmable
Programmable
Programmable
PC AUDIO
V 1.0 03-08
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-
-
-
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