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STAC9721 Datasheet(PDF) 30 Page - List of Unclassifed Manufacturers

Part # STAC9721
Description  Stereo AC 97 Codec With Multi-Codec Option
PDF  48 Pages
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Manufacturer  ETC1 [List of Unclassifed Manufacturers]
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STAC9721 Datasheet(HTML) 30 Page - List of Unclassifed Manufacturers

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SigmaTel, Inc.
Data Sheet
STAC9721
30
04/07/00
04/07/00
Figure 12. STAC9721/23 Powerdown/Powerup flow with analog still alive
PR0=1
PR1=1
PR4=1
Normal
ADCs off
PR0
DACs off
PR1
Digital I/F
off PR4
Shut off
Coda-link
PR0=0
&
ADC=1
PR1=0
&
DAC=1
Warm Reset
The above figure illustrates a state when all the mixers should work with the static volume settings that
are contained in their associated registers. This configuration can be used when playing a CD (or external
LINE_IN source) through STAC9721/23 to the speakers, while most of the system in low power mode.
The procedure for this follows the previous except that the analog mixer is never shut down.



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