CS4235
Advanced Product Databook
FEATURES
s
Compatible with Sound Blaster™, Sound Blaster
Pro™, and Windows Sound System™
s
Advanced MPC3-Compliant Input and Output
Mixer
s
Enhanced Stereo Full Duplex Operation
s
Dual Type-F DMA Support
s
Integrated CrystalClear™ 3D Stereo
Enhancement
s
Industry Leading Delta-Sigma Data Converters
(86 dB FS A)
s
Internal Default PnP Resources
s
CS9236 Wavetable Interface
s
CS4610 Audio Accelerator Interface
s
CS4236B/CS4237B/CS4238B Register
Compatible
CrystalClear™
Low Cost ISA Audio System
DESCRIPTION
The CS4235 is a single chip multimedia audio system
that is pin-compatible to the CS423xB for many de-
signs. The product includes an integrated FM
synthesizer and a Plug-and-Play interface. In addition,
the CS4235 includes hardware master volume control
pins as well as extensive power management and 3D
sound technology. The CS4235 is compatible with the
Microsoft
®
Windows Sound System standard and will
run software written to the Sound Blaster and Sound
Blaster Pro interfaces. The CS4235 is fully compliant
with Microsoft’s PC’97 and PC’98 audio requirements.
ORDERING INFO
CS4235-JQ 100 pin TQFP, 14x14x1.4mm
CS4235-KQ 100 pin TQFP, 14x14x1.4mm
XTALI
XTALO
VREF
VREF
INPUT MIXER
OSCILLATOR
SD<7:0>
SA<11:0>
IOR
IOW
AEN
IOCHRDY
IRQ<A:G>
DRQ<A:C>
DACK<A:C>
ISA
BUS
INTERFACE
FIFO
Stereo
ADC1
Σ
GAIN
L/RAUX1
GAIN
PLUG
AND
PLAY
CODEC
REG
I/F
GAIN
FIFO
Stereo
DAC1
ATTN
OUTPUT MIXER
FM
Synthesizer
Stereo
DAC2
L/RAUX2
CMAUX2
MIC
Config
IO
IRQ
DMA
MIN
Decode
Logic
Σ
MPU-401
UART
with
FIFOS
WSS
SBPRO
Registers
3D
Enhancement
ATTN
L/ROUT
SA<12:15)
(CDROM)
CD-ROM or
Upper Address Bits
ANALOG
JOYSTICK
LOGIC
CS4610
INTERFACE
CS9236
WAVETABLE
INTERFACE
UP
EEPROM
Interface
Hardware
Volume Control
DOWN
MUTE
BRESET
JOYSTICK
SERIAL PORT
SERIAL PORT
MIDI
SCL
SDA
NOV ‘97
Copyright
©
Cirrus Logic, Inc. 1997
(All Rights Reserved)
DS252PP2
CIRRUS [ CIRRUS LOGIC ]
