CS4237B
CrystalClear
™
Advanced Audio System with 3D Sound
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Integrated
SRS
®
3D Sound Technology
General Description
The CS4237B is a single chip multimedia audio system
that provides compatibility with the Microsoft Windows
Sound System standard and will run software written to
the Sound Blaster and Sound Blaster Pro interfaces.
The CS4237B is fully compliant with Microsoft’s PC’ 97
and WHQL audio requirements. The product includes
an internal FM synthesizer and Plug-and-Play external
interfaces for Wavetable, CD-ROM, and modem de-
vices. In addition, the CS4237B includes hardware
master volume control pins as well as extensive power
management and SRS 3D sound technology.
Compatible with Sound Blaster
TM
, Sound Blaster
Pro
TM
, and Windows Sound System
TM
Advanced MPC3-Compliant Input and Output Mixer
Enhanced Stereo Full Duplex Operation
Dual Type-F DMA Support
Industry Leading Delta-Sigma Data Converters
Fully Plug-and-Play ISA Compatible
3.3 V or 5 V ISA Bus Operation
Programmable Power Management
Hardware Master Volume Control
Enhanced Digital Gameport
CS9236 Wavetable Digital Audio Interface
MPU-401 MIDI Interface
Consumer IEC-958 Digital Output (S/PDIF)
CS4236/CS4232/CS4231 Register Compatible
XTALI
XTALO
VREF REFFLT
VREF
ORDERING INFORMATION:
CS4237B-JQ
100 pin TQFP, 14x14x1.4mm
CS4237B-KQ
100 pin TQFP, 14x14x1.4mm
L/RFILT
OSCILLATOR
INPUT MIXER
ISA
BUS
INTERFACE
LINEAR
µ
-LAW
A-LAW
ADPCM
Sample Rate
Converters
16
SAMPLE
FIFO
GAIN
SD<7:0>
SA<11:0>
IOR
IOW
AEN
IOCHRDY
IRQ<A:F>
DRQ<A:C>
DACK<A:C>
Σ
Stereo
A/D
GAIN
L/RLINE
GAIN
PLUG
AND
PLAY
CODEC
REG
I/F
SERIAL
SHIFT
Loopback
Monitor
Attenuation
GAIN
L/RAUX1
L/RAUX2
CMAUX2
L/RMIC
GAIN
FM
Synthesizer
GAIN
ATTN.
Sample Rate
Converters
LINEAR
µ
-LAW
A-LAW
ADPCM
16
SAMPLE
FIFO
Config
IO
IRQ
DMA
Decode
Logic
MIN
MOUT
L/ROUT
DIGITAL
MIXER
DSP
OUTPUT MIXER
Σ
Σ
MPU-401
UART
with
FIFOS
Σ
GAIN
Stereo
D/A
SA<12:15>
(CDROM)
(Modem)
CD-ROM, Modem, or
Upper Address Bits
DIGITAL/
ANALOG
JOYSTICK
LOGIC
CS9236
SERIAL
PORT
DSP
SERIAL
PORT
S/PDIF
Synth. Interface
or Hardware
Volume Control
WSS
SBPRO
Registers
Peripherals
&
EEPROM
Interface
XIOW
XIOR
XD<7:0>
XA<2:0>
JOYSTICK
WAVETABLE
SERIAL PORT
DSP SERIAL
PORT
MIDI
SCS/ SINT/ MUTE
UP DOWN
BRESET
Advanced Product Information
Cirrus Logic, Inc.
P.O. Box 17847, Austin, TX 78760
(512) 445 7222 Fax: (512) 445 7581
http://www.cirrus.com
This document contains information for a new product. Cirrus
Logic, Inc. reserves the right to modify this product without notice.
Copyright
©
Cirrus Logic, Inc. 1997
(All Rights Reserved)
SEP ’97
DS213PP4
1
CIRRUS [ CIRRUS LOGIC ]
