STAC9758 Datasheet, PDF (106/119 Pages) Integrated Device Technology – HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS

STAC9758/9759
HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS™
PC AUDIO
Figure 21. Powerdown/Powerup Flow With Analog Still Active
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 21 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 STAC9758/9759 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.
IDT™
106
HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS™
STAC9758/9759
V 1.2 1206