CS4297
Product Data Sheet
FEATURES
n
AC’97 1.03 Compatible
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Industry Leading Mixed Signal Technology
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18-bit stereo full-duplex Codec with fixed 48 kHz
sampling rate
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Four analog line-level stereo inputs for connec-
tion from LINE IN, CD, VIDEO and AUX
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Two analog line-level mono inputs for speaker-
phone and internal PC Beeper
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Mono microphone input switchable from two
external sources
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High quality differential CD input
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Dual Stereo line level outputs
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Extensive power management support
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Meets or exceeds Microsoft’s
®
PC’97 and PC’98
audio performance requirements.
CrystalClear™
SoundFusion™ Audio
Codec ’97
DESCRIPTION
The CS4297 is a AC’97 1.03 compatible stereo au-
dio Codec designed for PC multimedia systems.
Using the industry leading CrystalClear delta-sig-
ma and mixed signal technology, the CS4297
paves the way for PC’97-compliant desktop, porta-
ble, and entertainment PCs, where high-quality
audio is required.
The CS4297, when coupled with a DC’97 PCI au-
dio accelerator such as the CS4610, implements a
cost-effective, superior quality, two-chip audio so-
lution. The CS4297 Audio Codec ’97 and CS4610
PCI Audio Accelerator are the first members of the
SoundFusion family of advanced PCI audio prod-
ucts for next generation multimedia PCs.
ORDERING INFO
CS4297-KQ, 48-pin TQFP, 9x9x1 mm
CS4297-JQ, 48-pin TQFP, 9x9x1 mm
AC-LINK AND AC’97
REGISTERS
ANALOG INPUT MUX
AND OUTPUT MIXER
PWR
MGT
LINE
CD
AUX
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
RESET#
AC-
LINK
PCM_DATA
ADC
18 bits
INPUT
MUX
VIDEO
MIC1
GAIN / MUTE CONTROLS
MIXER / MUX SELECTS
OUTPUT
MIXER
MIC2
PHONE
PC_BEEP
AC’97
REGISTERS
PCM_DATA
DAC
18 bits
Σ
LINE_OUT
ALT_LINE_OUT
MONO_OUT
DS242F5
Copyright
©
Cirrus Logic, Inc. 1999
(All Rights Reserved)
JUN ‘99
CIRRUS [ CIRRUS LOGIC ]
