CS4297
CrystalClear™ SoundFusion™ Audio Codec ’97
Power Supplies
DVdd1, DVdd2 - Digital Supply Voltage
These pins provide the digital supply voltage for the AC-link section of the CS4297. These pins
may be tied to +5 V digital or to +3.3 V digital. The CS4297 and digital controller’s AC-link
should share a common digital supply
DVss1, DVss2 - Digital Ground
These pins are the digital ground connection for the AC-link section of the CS4297. These pins
should be isolated from analog ground currents.
AVdd1, AVdd2 - Analog Supply Voltage
These pins provide the analog supply voltage for the analog and mixed signal sections of the
CS4297. These pins must be tied to +5 Volt power supply. It is strongly recommended that +5
Volts be generated from a voltage regulator to ensure proper supply currents and noise
immunity from the rest of the system.
AVss1, AVss2 - Analog Ground
These pins are the ground connection for the analog, mixed signal, and substrate sections of the
CS4297. These pins should be isolated from digital ground currents.
3) Cirrus Logic, CRD4610-1 AC’97 Motherboard
Reference Design Data Sheet.
REFERENCES
1) Intel, Audio Codec ‘97 Component Specifica-
tion, Revision 1.03, September 15, 1996.
http://developer.intel.com/pc-supp
/platform/ac97/
http://www.cirrus.com/ftp/pubs/4610rd1.pdf
4) Steve Harris, Clif Sanchez, Personal Computer
Audio Quality Measurements, Ver 0.5
http://www.corp.cirrus.com/products/
papers/meas/meas.html
2) Cirrus Logic, CS4610 SoundFusion PCI Audio
Accelerator Data Sheet.
http://www.corp.cirrus.com/products/
overviews/cs4610.html
5) Microsoft, PC Design Guidelines,
http://www.microsoft.com/hwdev/desguid/
DS242F5
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