STAC9750XXTAEC1X IDT, Integrated Device Technology Inc, STAC9750XXTAEC1X Datasheet - Page 57

• Manufacturer Part Number: STAC9750XXTAEC1X
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of STAC9750XXTAEC1X

• Single Supply Voltage (typ): 3.3/5V
• Single Supply Voltage (min): 3.135V
• Single Supply Voltage (max): 3.465/5.25V
• Package Type: TQFP
• Lead Free Status / RoHS Status: Compliant

IDT™
VALUE-LINE TWO-CHANNEL AC’97 CODECS
STAC9750/9751
VALUE-LINE TWO-CHANNEL AC’97 CODECS
Figure 20 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 STAC9750/9751 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.
Figure 20. STAC9750/9751 Powerdown/Powerup Flow With Analog Still Active
Normal
PR0=0 & ADC=1
PR0=1
ADCs off PR0
PR1=0 & DAC=1
PR1=1
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DACs off PR1
PR4=1
Digital I/F off
Warm Reset
STAC9750/9751
PR4
AC-Link
Shut off
PC AUDIO
V 5.8 103106