CS4205
CrystalClear
Audio Codec ’97 for Portable Computing
Features
l
Integrated
l
Three
Asynchronous I
2
S Input Port
(ZV Port)
l
Integrated High-Performance Microphone
Pre-Amplifier
l
Integrated Digital Effects Processing for Bass
and Treble Response
l
Digital Docking Including an I
2
S Output, 3
Synchronous I
2
S Inputs
l
Performance Oriented Digital Mixer
l
SRS
3D Stereo Enhancement
l
On-chip PLL for use with External Clock
Sources
l
Dedicated Microphone Analog-to-Digital
Converter
l
Sample Rate Converters
l
S/PDIF Digital Audio Output
l
AC ’97 2.1 Compliant
l
PC Beep Bypass
l
20-bit Stereo Digital-to-Analog Converters
l
18-bit Stereo Analog-to-Digital Converters
Analog Line-level Stereo Inputs for
LINE IN, VIDEO, and AUX
l
High Quality Pseudo-Differential CD Input
l
Extensive Power Management Support
l
Meets or Exceeds the Microsoft
PC 99 and
PC 2001 Audio Performance Requirements
Description
The CS4205 is an AC ’97 2.1 compliant stereo audio co-
dec designed for PC multimedia systems. It uses
industry leading CrystalClear
delta-sigma and mixed
signal technology. The CS405 is the first Cirrus AC ’97
audio codec to feature digital centric mixing and digital
effects. This advanced technology and these features
are designed to help enable the design of PC 99 and
PC 2001 compliant high-quality audio systems for desk-
top, portable, and entertainment PCs.
Coupling the CS4205 with a PCI audio accelerator or
core logic supporting the AC ’97 interface, implements a
cost effective, superior quality audio solution. The
CS4205 surpasses PC 99, PC 2001, and AC ’97 2.1 au-
dio quality standards.
ORDERING INFO
CS4205-KQ 48-pin TQFP
9x9x1.4 mm
AC-LINK AND AC ’97
REGISTERS
ANALOG INPUT MUX
AND OUTPUT MIXER
18 bit
ADC
(2ch)
INPUT
MUX
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
RESET#
ID0#
ID1#
TEST
PWR
MGT
SRC
PCM_DATA
AC-
LINK
AC
’97
REG
SRC
MIC_PCM_DATA
18 bit
ADC
(1ch)
LINE
CD
AUX
VIDEO
MIC1
MIC2
PHONE
PC_BEEP
SIGNAL
PROCESSING
ENGINE
GAIN / MUTE CONTROLS
MIXER / MUX SELECTS
INPUT
MIXER
Σ
OUTPUT
MIXER
20 bit
DAC
(2ch)
GPIO0/LRCLK
GPIO1/SDOUT
EAPD/SCLK
SPDO/SDO2
GPIO[2:4]/SDI[1:3]
ZSCLK,ZSDATA,ZLRCLK
GPIO
S/PDIF
SERIAL DATA PORT
SRC
ZV PORT
PCM_DATA
Σ
LINE_OUT
MONO_OUT
Preliminary Product Information
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
Copyright
Cirrus Logic, Inc. 2001
(All Rights Reserved)
APR ‘01
DS489PP2
1
CIRRUS [ CIRRUS LOGIC ]
