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DS734F5

OCT '11

CS485xx Family Data Sheet

Features

 Cost-effective, High-performance 32-bit DSP

 300,000,000 MAC/S (multiply accumulates per second)

 Dual MAC cycles per clock

 72-bit accumulators are the most accurate in the industry

 24k x 32 SRAM, 2k blocks - assignable to data or program

 Internal ROM contains a variety of configurable sound

enhancement feature sets

 8-channel internal DMA

 Internal watch-dog DSP lock-up prevention

 DSP Tool Set w/ Private Keys for Protecting Customer IP

 Configurable Serial Audio Inputs/Outputs

 Configurable for all input/output types

 Maximum 32-bit @ 192 kHz

 Supports 32-bit audio sample I/O between DSP chips

 TDM input modes (multiple channels on same line)

 192 kHz SPDIF transmitter

 Multi-channel DSD direct stream digital SACD input

 Supports Two Different Input Fs Sample Rates

 Output can be master or slave

 Dual processing path capability

 Input supports dual domain slave clocking

 Hardware assist time sampling for sample rate conversion

 Integrated Clock Manager/PLL

 Can operate from external crystal, external oscillator

 Input Fs Auto Detection

 Host & Boot via Serial Interface

 Configurable GPIOs and External Interrupt Input

 1.8V Core and a 3.3V I/O that is tolerant to 5V input

 Low-power Mode

 “Energy Star

Ready” in low-power mode, 268 µW in standby

Differentiating from the legacy Cirrus multi-standard, multi-channel

decoders, this new CS485xx family is still based on the same

high-performance 32-bit fixed point Digital Signal Processor core

but instead is equipped with much less memory, tailoring it for more

cost-effective applications associated with multi-channel and

virtual-channel sound enhancements. Target applications are:

 Digital Televisions

 Multimedia Peripherals

 iPod

Docking Stations

 Automotive Head Units

 Automotive Outboard Amplifiers

 HD-DVD

™

and Blu-ray Disc

DVD Receivers

 PC Speakers

There are also a wide variety of licensable DSP codes available

today as seen by the following examples:

Cirrus also has developed, or is developing their own royalty-free

versions of popular features sets like Cirrus Bass Manager, Cirrus

Dynamic Volume Leveler, Cirrus Original Multichannel Surround,

Cirrus Virtual Speaker & Cirrus 3D-Audio.

The CS485xx family is programmed using the Cirrus proprietary

DSP Composer

™

GUI development tool. Processing chains may be

designed using a drag-and-drop interface to place/utilize functional

macro audio DSP primitives. The end result is a software image that

is down-loaded to the DSP via serial host or serial boot modes.

See Section 6 for ordering information.

CS485xx Block Diagram

32-bit

DSP

P X Y

Serial

Control 1

12 Ch PCM

Audio Out

GPIO Debug

Watchdog

TMR1

TMR2

PLL

S/PDIF

12 Ch. Audio In /

6 Ch. SACD In

CS485xx

1 2 3 4 5 6 ... 22 23

Sommario

Pagina 1 - CS485xx Family Data Sheet

Pagina 2 - DS734F5 2

10 DS734F55.4 Power Supply Characteristics 5.4 Power Supply Characteristics(Measurements performed under operating conditions)5.5 Thermal Data (48-pi

Pagina 3 - TABLE OF CONTENTS

11 DS734F55.6 Switching Characteristics—RESET 5.6 Switching Characteristics—RESETFigure 5-1. RESET Timing5.7 Switching Characteristics—XTIFigure 5-2.

Pagina 4 - LIST OF TABLES

12 DS734F55.9 Switching Characteristics—Serial Control Port–SPI Slave Mode 5.9 Switching Characteristics—Serial Control Port–SPI Slave ModeFigure 5-3.

Pagina 5 - 2 Overview

13 DS734F55.10 Switching Characteristics—Serial Control Port–SPI Master Mode 5.10 Switching Characteristics—Serial Control Port–SPI Master ModeFigure

Pagina 6 - 3 Code Overlays

14 DS734F55.12 Switching Characteristics—Serial Control Port–I2C Master Mode Figure 5-5. Serial Control Port–I2C Slave Mode Timing5.12 Switching Chara

Pagina 7 - 4.2 On-chip DSP Peripherals

15 DS734F55.13 Switching Characteristics—Digital Audio Slave Input Port Figure 5-6. Serial Control Port–I2C Master Mode Timing5.13 Switching Character

Pagina 8 - 4.3 DSP I/O Description

16 DS734F55.15 Switching Characteristics—Digital Audio Output (DAO) Port 5.15 Switching Characteristics—Digital Audio Output (DAO) PortFigure 5-9. Dig

Pagina 9 - 5.1 Absolute Maximum Ratings

17 DS734F55.15 Switching Characteristics—Digital Audio Output (DAO) Port Figure 5-10. Digital Audio Output Timing, Slave Mode (Relationship LRCLK to S

Pagina 10 - 10 DS734F5

18 DS734F56 Ordering Information 6 Ordering InformationThe CS485xx family part number is CS485NI-XYZR where:• N–Product Number Variant• I–ROM ID Numbe

Pagina 11 - 11 DS734F5

19 DS734F58 Device Pinout Diagrams 8 Device Pinout Diagrams8.1 CS48520, 48-pin LQFP Pinout DiagramFigure 8-1. CS48520, 48-pin LQFP PinoutXTOXTIGNDAPL

Pagina 12 - 12 DS734F5

DS734F5 2 Contacting Cirrus Logic Support For all product questions and inquiries, contact a Cirrus Logic Sales Representative. To find the one neares

Pagina 13 - C Slave Mode

20 DS734F58.2 CS48540, 48-pin LQFP Pinout Diagram 8.2 CS48540, 48-pin LQFP Pinout DiagramFigure 8-2. CS48540, 48-pin LQFP PinoutXTOXTIGNDAPLL_REF_RES

Pagina 14 - C Master Mode

21 DS734F58.3 CS48560, 48-pin LQFP Pinout Diagram 8.3 CS48560, 48-pin LQFP Pinout DiagramFigure 8-3. CS48560, 48-pin LQFPXTOXTIGNDAPLL_REF_RESVDDA (3

Pagina 15 - DAI_DATAn

22 DS734F59 Package Mechanical Drawings 9 Package Mechanical Drawings9.1 48-pin LQFP Package DrawingFigure 9-1. 48-pin LQFP Package Drawing48 LD LQFP

Pagina 16 - Parameter Symbol Min Max Unit

23 DS734F510 Revision History 10 Revision HistoryRevision Date ChangesA1 July, 2006 Advance release.A2 July, 2006 Updated pinout definition for pins 2

Pagina 17 - DAOn_DATAn

3 DS734F5 TABLE OF CONTENTS1 Documentation Strategy ...

Pagina 18 - 6 Ordering Information

4 DS734F5 LIST OF FIGURESFigure 5-1. RESET Timing ...

Pagina 19 - 8 Device Pinout Diagrams

5 DS734F51 Documentation Strategy 1 Documentation StrategyThe CS485xx Family Data Sheet describes the CS485xx family of multichannel audio processors.

Pagina 20 - AI2_DATA0

6 DS734F53 Code Overlays 3 Code OverlaysThe suite of software available for the CS485xx family consists of an operating system (OS) and a library of o

Pagina 21 - 48-Pin LQFP

7 DS734F54 Hardware Functional Description 4 Hardware Functional Description4.1 DSP CoreThe CS485xx family DSPs are single-core DSP with separate X an

Pagina 22 - 9 Package Mechanical Drawings

8 DS734F54.3 DSP I/O Description 4.2.2 Digital Audio Output Port (DAO)Each version of the CS485xx supports a different number of output channels. Refe

Pagina 23 - 10 Revision History

9 DS734F54.4 Application Code Security 4.3.3 PadsThe CS485xx I/Os operate from the 3.3 V supply and are 5 V tolerant.4.4 Application Code SecurityThe

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