92hd88b4x5ndg Integrated Device Technology, 92hd88b4x5ndg Datasheet - Page 20

• Manufacturer Part Number: 92hd88b4x5ndg
• Description: Single Chip Pc Audio System Codec+mono Speaker Amplifier+capless Hp+ldo
• Manufacturer: Integrated Device Technology

IDT PROPRIETARY / IDT
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
92HD88
SINGLE CHIP PC AUDIO SYSTEM, CODEC+SPEAKER AMPLIFIER+CAPLESS HP+LDO
2.6.
2.7.
2.8.
2.9.
1.
2.
3.
4.
5.
AFG D0
AFG D1
AFG D2
AFG D3
Reference Bias generator
Reference Bandgap core
No DAC or ADC streams are active. Analog mixing and loop thru are supported.
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.
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.
Not active if BITCLK is not running (Controller in D3), but can signal power state change request (PME)
Both AVDD and DVDD must be available for Port Sense to operate.
HD Audio-Link
Port Sense
CONFIDENTIAL
Function
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.
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.
D1 is a lower power mode where all converter widgets are disabled. Analog mixer and port functions
are active. The part will resume from theD1 to theD0 state within 1 mS.
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. The part will resume from the D2 state to the D0 state
within 2mS.
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 lon-
ger than those from D2, but still less than 10mS to meet Intel low power goals. The default power
state for the Audio Function Group after power is applied is D3.
On
On
On
On
D0
Table 5. Power Management
D1
On
On
On
On
1
20
On
On
On
On
D2
On
On
On
On
D3
4
5
92HD88
Limited
D3cold
Off
On
On
Specific D4
Vendor
Off
On
On
Off
PC AUDIO
SpecificD5
V 0.94 07/11
Vendor
Off
Off
Off
Off