CS4923/4/5/6/7/8/9
Multi-Channel Digital Audio Decoders
l
CS4923/4/5/6/7/8
features
Description
The CS4923/4/5/6/7/8 is a family of multi-channel digital
audio decoders, with the exception of the CS4929 as the
only stereo digital audio decoder. The CS4923/4/5/6 are
designed for Dolby Digital and MPEG-2 Stereo decoding. In
addition the CS4925 adds MPEG-2 multi-channel decoding
capability and the CS4926 provides DTS decoding. The
CS4927 is an MPEG-2 multi-channel decoder and the
CS4928 is a DTS multi-channel decoder. The CS4929 is an
AAC 2-channel and MPEG-2 stereo decoder. Each one of
the CS4923/4/5/6/7/8/9 provides a complete and flexible
solution for multi-channel (or stereo in the case of the
CS4929) audio decoding in home A/V receiver/amplifiers,
DVD movie players, out-board decoders, laser-disc players,
HDTV sets, head-end decoders, set-top boxes, and similar
products.
Cirrus Logic’s Crystal Audio Division provides a complete set
of audio decoder and auxiliary audio DSP application
programs for various applications. For all complementary
analog and digital audio I/O, Crystal Audio also provides a
complete set of high-quality audio peripherals including:
multimedia CODECs, stereo A/D and D/A converters and
IEC60958 interfaces. Of special note, the CS4226 is a
complementary CODEC providing a digital receiver, stereo
A/D converters, and six 20-bit DACs in one package.
ORDERING INFORMATION
CS4923xx-CL 44-pin PLCC (xx = ROM revision)
CRD4923
Reference design with CS4226
CDB4923
Evaluation board
— Optional Virtual 3D Output
— Simulated Surround and Programmable Effects
— Real Time Autodetection of Dolby Digital
®
,
DTS
®
, MPEG Multi-Channel and PCM
— Flexible 6-channel master or slave output
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CS4923/4/5/6/7/8/9
features
— IEC60958/61937 transmitter for compressed-
data or linear-PCM output
— Dedicated 8 kilobyte input buffer
— DAC clock via analog phase-locked loop
— Dedicated byte wide or serial host interface
— Multiple compressed data input modes
— PES layer decode for A/V synchronization
— 96-kHz-capable PCM I/O, master or slave
— Optional external memory and auto-boot
— +3.3-V CMOS low-power, 44-pin package
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CS4923/4/5/6
features
— Capable of Dolby Digital
®
Group A Performance
— Dolby bass manager and crossover filters
— Dolby Surround Pro Logic
®
Decoding
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CS4925/7:
MPEG-2 Multi-Channel Decoder
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CS4926/8: DTS Multi-Channel Decoder
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CS4929: AAC 2-Channel (Low Complexity)
and MPEG-2 Stereo Decoder
RESET
CMPDAT,
SDATAN2
CMPCLK,
SCLKN2
CMPREQ,
LRCLKN2
SCLKN1,
STCCLK2
LRCLKN1
SDATAN1
CLKIN
CLKSEL
RD,
WR,
SCDIO,
DATA7:0,
R/W,
DS,
SCDOUT,
EMAD7:0,
EMOE, EMWR,
PSEL, A0,
A1,
ABOOT,
GPIO7:0
CS
GPIO11 GPIO10 GPIO9 SCCLK SCDIN
INTREQ
EXTMEM,
GPIO8
DD
DC
Compressed
Data Input
Interface
Parallel or Serial Host Interface
Framer
Shifter
Input
Buffer
Controller
24-Bit
DSP Processing
RAM
RAM
Program Data
Memory Memory
ROM
ROM
Program Data
Memory Memory
STC
Output
Formatter
MCLK
SCLK
LRCLK
AUDATA[2.0]
RAM
Output
Buffer
Digital
Audio
Input
Interface
RAM Input
Buffer
PLL
Clock Manager
FILT2 FILT1
VA AGND
XMT958
DGND[3:1]
VD[3:1]
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. 1999
(All Rights Reserved)
AUG ‘99
DS262F2
1
CIRRUS [ CIRRUS LOGIC ]
