STAC9752A Datasheet, PDF (86/106 Pages) Integrated Device Technology – AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK

STAC9752A/9753A
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
PC AUDIO
Figure 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
AC-Link
PR0=0 & ADC=1 PR1=0 & DAC=1
Warm Reset
Figure 23 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 exter-
nal LINE_IN source) through the STAC9752A/9753A to the speakers, while 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.
IDT™
86
AC’97 2.3 CODECS WITH STEREO MICROPHONE & UNIVERSAL JACK
STAC9752A/9753A
V 1.5 1206