
Features
Windows Sound System
TM
Compatible Codec
ADPCM Compression/Decompression
Extensive Software Support
MPC Level 2 Compatible Mixer
Dual DMA Registers support Full
Duplex Operation
On-Chip FIFOs for higher performance
Selectable Serial Audio Data Port
Pin Compatible with CS4231/CS4248
General Description
The CS4231A includes stereo 16-bit audio converters
and complete on-chip filtering for record and playback
of 16-bit audio data. In addition, analog mixing and
programmable gain and attenuation are included to
provide a complete audio subsystem. A selectable se-
rial port can pass audio data to and from DSPs or
ASICs. Crystal-developed high-performance software
drivers for various operating systems are available that
support all the CS4231A features including full duplex
transfers. The CS4231A is a pin compatible upgrade to
the CS4231 and CS4248.
ORDERING INFORMATION:
CS4231A-KL
CS4231A-KQ
0 to 70
°
C
0 to 70
°
C
68-pin PLCC
100-pin TQFP
SEPT ’94
DS139PP2
1
Crystal Semiconductor Corporation
P.O. Box 17847, Austin, TX 78760
(512) 445-7222 Fax: (512) 445-7581
Parallel Interface, Multimedia Audio Codec
Semiconductor Corporation
CS4231A
This document contains information for a new product. Crystal
Semiconductor reserves the right to modify this product without notice.
Preliminary Product Information
Mute
Gain
I0
Gain
I1
Mux
LMIC
RMIC
LLINE
RLINE
LAUX1
RAUX1
LOUT
ROUT
RAUX2
LAUX2
Mute
AGND1
AGND2
D
A
20dB Gain
I0
I1
VREF
VREFI
VREF
XTAL2I
XTAL2O
Oscillators
LFILT RFILT
D<7:0>
A<1:0>
CS
WR
PDRQ
CDRQ
PDAK
CDAK
8
2
IRQ
DBDIR
DBEN
XCTL1
XCTL0
Parallel
Bus
Interface
PDWN
Mute
I26
MIN
MOUT
Linear
μ
-law
A-law
ADPCM
Linear
μ
-law
A-law
ADPCM
DGND3/4/7/8
DGND1 DGND2
XTAL1I
XTAL1O
VD1
VD2
FIFO
16
Samples
VD3
VD4
16 Bit Timer
VA1 VA2
16-bit
A/D
16-bit
A/D
Mix
Gain
Mix
Gain
Mix
Gain
Mix
Gain
16-bit
D/A
16-bit
D/A
Optional
Dither
I10
Loopback
Digital
Attenuation
RD
FIFO
16
Samples
SDOUT
SDIN
SCLK FSYNC
I4
I5
I3
I2
I26
I8
I18
I19
I1
I0
I13
I8
I8 or I28
I20,I21
I 16
I6
I7
TEST
Audio Data Serial Port
I16
Copyright
Crystal Semiconductor Corporation 1994
(All Rights Reserved)