STAC9766 IDT [Integrated Device Technology], STAC9766 Datasheet - Page 82

• Manufacturer Part Number: STAC9766
• Manufacturer: IDT [Integrated Device Technology]

IDT™
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
Figure 23 illustrates a state when all the mixers work with the static volume settings that are con-
tained in their associated registers. This configuration can be used when playing a CD (or external
LINE_IN source) through STAC9766/9767 to the speakers, with most of the system in low power
mode. The procedure for this follows the previous example except that the analog mixer is never
shut down.
Normal
PR0=0 & ADC=1
Figure 23. Powerdown/Powerup Flow With Analog Still Alive
PR0=1
ADCs off PR0
PR1=0 & DAC=1
PR1=1
DACs off PR1
82
PR4=1
Digital I/F off
Warm Reset
PR4
STAC9766/9767
Shut off
AC-Link
PC AUDIO
V 7.4 12/06