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PDF CS497004 Data sheet ( Hoja de datos )
| Número de pieza | CS497004 | |
| Descripción | High Definition Audio Decoder DSP | |
| Fabricantes | Cirrus Logic | |
| Logotipo |  |
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CS4970x4 Data Sheet
FEATURES
Multi-standard 32-bit high-definition audio decoding plus
post-processing
Supports high-definition audio formats including:
— Dolby Digital® Plus
— Dolby® TrueHD
— DTS-HD® High Resolution Audio
— DTS-HD Master Audio™
— DTS Express™ 5.1
Supports legacy audio formats and a wide array of post-
processing
— Dolby Digital® EX, Dolby Pro Logic® II, IIx, IIz 7.1, Dolby
Headphone® 2, Dolby Virtual Speaker® 2, Dolby
Volume® (original), Dolby Volume 258 (lite), Audistry®
— DTS-ES 96/24™ Discrete 7.1, DTS-ES™ Discrete 7.1,
DTS-ES™ Matrix 6.1, DTS Neo:6®, DTS Neural
Surround™ DTS Surround Sensation Speaker
— MPEG-2 AAC™ LC 5.1
— SRS® Circle Surround® II, SRS Circle Surround Auto,
SRS Circle Surround Decoder Optimized, SRS
TruVolume™ 7.1 (V 2.1.0.0), SRS TruSurround
HD/HD4®, SRS WOW HD™, SRS CS Headphone™,
SRS Circle Cinema 3D™, SRS Studio Sound HD™
— THX® Ultra2™, THX Select2™
Cirrus Logic’s Applications Library
— Cirrus Original Multi-Channel Surround 2 (COMS2),
Cirrus Band XpandeR™, Cirrus Virtualization
Technology (CVT), Cirrus Intelligent Room Calibration 2
(IRC2), Cirrus Bass Enhancement (CBE)
— Crossbar Mixer, Signal Generator
— Advanced Post-Processors including: 7.1 Bass Manager
Quadruple Crossover, Tone Control, 11- Band
Parametric EQ, Delay, 2:1/4:1 Decimator, 1:2/1:4
Upsampler
High Definition Audio Decoder DSP Family
with Dual 32-bit Engine Technology
Up to 12 Channels of 32-bit Serial Audio Input
Customer Software Security Keys
16 Ch x 32-bit PCM Out with Dual 192 kHz S/PDIF Tx
Two SPI™/I2C™ ports
Large On-chip X, Y, and Program RAM & ROM
SDRAM and Serial Flash Memory Support
The CS4970x4 DSP family is an enhanced version of the
CS4953xx DSP family with higher overall performance. In
addition to all the mainstream audio processing codes in on-
chip ROM that the CS4953xx DSP offers, the CS4970x4 device
family also supports the decoding of major high-definition audio
formats. Additionally, the CS4970x4, a dual-core device,
performs the high-definition audio decoding on the first core,
leaving the second core available for audio post-processing and
audio enhancement. The CS4970x4 device supports the most
demanding audio post processing requirements. It provides an
easy upgrade path to systems currently using the CS495xx or
CS4953xx device with minor (or no) hardware and software
changes.
Ordering Information
See page 27 for ordering information.
Serial
Control 1
12 Ch. Audio In /
6 Ch. SACD In
S/PDIF S/PDIF
16 Ch PCM
Audio Out
Serial
Control 2
Parallel
Control
GPIO
Debug
Coyote 32-bit
DSP A
D
M
A
Coyote 32-bit
DSP B
PXY
PXY
Ext. Memory Controller
STC
TMR1
TMR2
PLL
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
http://www.cirrus.com
Copyright © 2014 Cirrus Logic, Inc.
All Rights Reserved
FEB 2014
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CS4970x4 Data Sheet
32-bit High Definition Audio Decoder DSP Family
Table 2. Device and Firmware Selection Guide
Device
Decode Processor
(DSP-A)1
Matrix Processor Module
(DSP-A)1
Virtualizer Processor
Module
(DSP-B)1
Post Processor
Module
(DSP-B)1
CS497014
300MACS
CS497004
300MACS
CS497024
300MACS
Stereo PCM
(4:1/2:1 Down-sampling and
1:2/1:4 U-sampling Options)2
Multichannel PCM
(4:1/2:1 Down-sampling and
1:2/1:4 Up-sampling Options)2
Dolby Digital
MPEG-2 AAC LC 5.1
Dolby Digital Plus
Dolby TrueHD3
Same as CS497014 +
DTS, DTS-ES, DTS96/24
DTS-HD Master Audio3
DTS-HD High Res Audio3
DTS Express 5.1
Dolby Pro Logic II / IIx / IIz 7.1
APP
(Advanced Post-
SRS Circle Surround II / Circle
Surround Auto / Circle
Surround Decoder Optimized
(Stereo In)
Cirrus Original Multi-Channel
Surround 2 (Effects / Reverb
Processor)
Crossbar (Down-mix / Up-mix)
(Simultaneous Process)
Cirrus Virtualizer
Technology
Dolby Headphone 2
Dolby Virtual Speaker 2
SRS CS Headphone
processing)
–Tone Control
–Select 2
–PEQ (up to 11 Bands)
–Delay
(Speaker to Listening
Position Alignment
and/or Lip Sync)
–7.1 Bass Manager
–Audio Manager
–4:1/2:1 Down-sampling2
Same as CS497014 +
DTS Neo:6, DTS Neural
Surround
SRS TruSurround HD/HD4 SRS TruVolume 7.1
Multichannel
Dolby Volume
Multichannel
1. Additional processing (MPMA, MPMB/VPM, PPM) post any of the HD audio decoders may be limited. Contact your Cirrus Logic
FAE for the latest concurrency matrix.
2. Downsampling and Upsampling functionality is located in the operating system. The Cirrus Decimator (Down-Sampler) is also
available as a separate post-processing module that is described in the application note AN288PPI.
3. The indicated HD audio decoder algorithms require external SDRAM. Consult your Cirrus Logic FAE for the recommended
SDRAM size for your design.
2.1 Migrating from CS495xx(3) to CS4970x4
CS4970x4 was designed to provide an easy upgrade path from the CS495xx and CS4953x. There are some
small differences the hardware designer should be aware of:
• The PLL supply voltage on the CS4970x4 is 3.3V vs. 1.8V on the CS495xx.
• The PLL filter topology is simpler when using the CS4970x4 rather than the CS495xx.
• The CS4970x4 adds support for Time-division multiplexing (TDM) mode on both audio input and output
ports.
• The CS4970x4 does not support external static random access memory (SRAM) operation.
• The CS4970x4 external Synchronous dynamic random access memory (SDRAM) bus speed is fixed at
150 MHz vs. the 120 MHz maximum bus speed for the CS495xx. Some firmware modules also support a
75 MHz CS4970x4 SDRAM bus speed. Refer to AN304 for details.
• The CS4970x4 CLKOUT pin can output XTALI or XTALI/2. The CS495xx can only output XTALI.
2.2 Licensing
Licenses are required for all of the third party audio decoding/processing algorithms listed below, including the
application notes. Contact your local Cirrus Sales representative for more information.
3 Code Overlays
The suite of software available for the CS4970x4 family consists of operating systems (OS) and a library of
overlays. The overlays have been divided into three main groups: decoders, matrix processors, and
postprocessors. All software components are defined in the following list:
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5 Page 
5.6 Switching Characteristics—RESET
Parameter
RESET minimum pulse width low
All bidirectional pins high-Z after RESET low
Configuration pins setup before RESET high
Configuration pins hold after RESET high
CS4970x4 Data Sheet
32-bit High Definition Audio Decoder DSP Family
Symbol
Trstl
Trst2z
Trstsu
Trsthld
Min
1
—
50
20
Max
Unit
— s
100 ns
— ns
— ns
RESET#
HS[3:0]
All Bidirectional
Pins
Trst2z
Trstl
Trstsu Trsthld
Figure 1. RESET Timing
5.7 Switching Characteristics — XTI
Parameter
External Crystal operating frequency1
XTI period
XTI high time
XTI low time
External Crystal Load Capacitance (parallel resonant)2
External Crystal Equivalent Series Resistance
Symbol
Fxtal
Tclki
Tclkih
Tclkil
CL
ESR
Min
12.288
41
16.4
16.4
10
—
Max
24.576
81.4
—
—
18
50
Unit
MHz
ns
ns
ns
pF
1. Part characterized with the following crystal frequency values: 12.288 and 24.576 MHz.
2. CL refers to the total load capacitance as specified by the crystal manufacturer. Crystals which require a CL outside this range
should be avoided. The crystal oscillator circuit design should follow the crystal manufacturer’s recommendation for load capacitor
selection.
XTI
t clkih
Tclki
t clkil
Figure 2. XTI Timing
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