alc888-vc2-gr Realtek Semiconductor Corporation, alc888-vc2-gr Datasheet - Page 32

• Manufacturer Part Number: alc888-vc2-gr
• Description: 7.1+2 Channel High Definition Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

7.5.3.
7.5.4.
The ALC888-VC is designed to meet Intel’s low-power-state white paper and is ECR HDA-015B
compliant. It meets the five attributes discussed in the white paper:
1. D3 state power < 30mW.
2. Exit latency (D3 to D0 transfer) < 10ms.
3. Audio pop/click suppression during D3 and D0 transition < -65dBV.
4. Supports Jack detection in D3 state.
5. D3 functions with or without the BITCLK
The ALC888-VC minimizes D3 state idle mode power consumption and increases overall battery life in
mobile systems.
In D3 mode, only a power on reset or a ‘double function reset’ resets all ALC888-VC settings, cutting
software configuration time spent entering/leaving D3 state, and reducing latency time for D3 to D0
transitions.
The ALC888-VC supports Wake-Up events in D3 mode, including jack detection and GPIO status
changes. If the HDA-Link was alive (with BCLK), the ALC888-VC Wake-Up response is as normal. If
no BITCLK is present, the ALC888-VC drives the SDI high in order to wake up the system.
7.1+2 Channel High Definition Audio Codec
Condition
LINK Response powered down
Front DAC powered down
Surr DAC powered down
CEN/LFE DAC powered down
SIDESURR DAC powered down
Fout DAC powered down
LINE ADC powered down
MIX ADC powered down
Headphone Driver powered down
Mixers powered down
Reference power down
Powered Down Conditions
ALC888-VC Additional Power Features
Table 16. Powered Down Conditions
Description
Internal clock is stopped. SDATA-IN and S/PDIF-OUT are floated with internally
pulled low 47K resistors. S/PDIF-IN is also floated. Detection of ‘Link Reset
Entry’ and ‘Link Reset Exit’ sequences are supported. All states are maintained if
DVDD is supplied
Analog block and digital filter are powered down
Analog block and digital filter are powered down
Analog block and digital filter are powered down
Analog block and digital filter are powered down
Analog block and digital filter are powered down
Analog block and digital filter are powered down. Data on SDATA-IN is quiet
Analog block and digital filter are powered down. Data on SDATA-IN is quiet
All headphone drivers are powered down
All internal mixer widgets are powered down. The DC reference and VREFOUTx
at individual pin complexes are still alive
All internal references, DC reference, and VREFOUTx at individual pin
complexes are off
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Track ID: JATR-1076-21
Datasheet
ALC888
Rev. 1.4