CS48560-DQZR Datasheet CS48560-CQZR, CS48560-DQZR, CS48520-DQZ | P4-P6

4 DS734F5

LIST OF FIGURES

Figure 5-1. RESET Timing ...................................................................................................................................... 5-11

Figure 5-2. XTI Timing............................................................................................................................................. 5-11

Figure 5-3. Serial Control Port–SPI Slave Mode Timing ......................................................................................... 5-12

Figure 5-4. Serial Control Port–SPI Master Mode Timing ....................................................................................... 5-13

Figure 5-5. Serial Control Port–I

C Slave Mode Timing.......................................................................................... 5-14

Figure 5-6. Serial Control Port–I

C Master Mode Timing........................................................................................ 5-15

Figure 5-7. Digital Audio Input (DAI) Port Timing Diagram...................................................................................... 5-15

Figure 5-8. Direct Stream Digital–Serial Audio Input Timing................................................................................... 5-15

Figure 5-9. Digital Audio Output Port Timing, Master Mode.................................................................................... 5-17

Figure 5-10. Digital Audio Output Timing, Slave Mode (Relationship LRCLK to SCLK) ......................................... 5-17

Figure 8-1. CS48520, 48-pin LQFP Pinout.............................................................................................................. 8-19

Figure 8-2. CS48540, 48-pin LQFP Pinout.............................................................................................................. 8-20

Figure 8-3. CS48560, 48-pin LQFP......................................................................................................................... 8-21

Figure 9-1. 48-pin LQFP Package Drawing............................................................................................................. 8-22

LIST OF TABLES

Table 1-1. CS485xx Family Related Documentation................................................................................................. 1-5

Table 3-1. Device and Firmware Selection Guide..................................................................................................... 3-6

Table 5-1. Master Mode (Output A1 Mode)............................................................................................................. 5-16

Table 5-2. Slave Mode (Output A0 Mode)............................................................................................................... 5-17

Table 6-1. Ordering Information .............................................................................................................................. 6-18

Table 7-1. Environmental, Manufacturing, and Handling Information ..................................................................... 7-18

5 DS734F5

1 Documentation Strategy

The CS485xx Family Data Sheet describes the CS485xx family of multichannel audio processors. This document should

be used in conjunction with the following documents when evaluating or designing a system around the CS485xx family

of processors.

The scope of the CS485xx Family Data Sheet is primarily the hardware specifications of the CS485xx family of devices.

This includes hardware functionality, characteristic data, pinout, and packaging information.

The intended audience for the CS485xx Family Data Sheet is the system PCB designer, MCU programmer, and the quality

control engineer.

2 Overview

The CS485xx DSP Family is designed to provide high-performance post-processing and mixing of digital audio. The dual

clock domain provided on the PCM inputs allows for the mixing of audio streams with different sampling frequencies. The

low-power standby preserves battery life for applications which are always on, but not necessarily processing audio, such

as automotive audio systems.

There are three devices comprising the CS485xx family. The CS48520, CS48540 and CS48560 are differentiated by the

number of inputs and outputs available. All DSPs support dual input clock domains and dual audio processing paths. All

DSPs are available in a 48-pin QFP package. Refer to Table 3-1 for the input, output, firmware features of each device.

2.1 Licensing

Licenses are required for all of the third party audio processing algorithms listed in Section 3. Contact your local

Cirrus Logic Sales representative for more information.

Table 1-1. CS485xx Family Related Documentation

Document Name Description

CS485xx Family Data Sheet This document

CS485xx Family Hardware User’s Manual Includes detailed system design information including Typical Connection Diagrams,

Boot-Procedures, Pin Descriptions, etc.

AN298–CS485xx Family Firmware User’s Manual Includes detailed firmware design information including signal processing flow

diagrams and control API information

DSP Composer User’s Manual Includes detailed configuration and usage information for the GUI development tool.

6 DS734F5

3 Code Overlays

The suite of software available for the CS485xx family consists of an operating system (OS) and a library of overlays. The

overlays have been divided into three main groups called Matrix-processors, Virtualizer-processors, and Post-processors.

All software components are defined below:

1. OS/Kernel—Encompasses all non-audio processing tasks, including loading data from external memory,

processing host messages, calling audio-processing subroutines, error concealment, etc.

2. Matrix-processor—Any Module that performs a matrix decode on PCM data to produce more output channels

than input channels (2n channels). Examples are Dolby ProLogic IIx and DTS Neo:6. Generally speaking, these

modules increase the number of valid channels in the audio I/O buffer.

3. Virtualizer-processor—Any module that encodes PCM data into fewer output channels than input channels (n2

channels) with the effect of providing “phantom” speakers to represent the physical audio channels that were

eliminated. Examples are Dolby Headphone

and Dolby Virtual Speaker

. Generally speaking, these modules

reduce the number of valid channels in the audio I/O buffer.

4. Post-processors—Any module that processes audio I/O buffer PCM data in-place after the matrix- or

virtualizer-processors. Examples are bass management, audio manager, tone control, EQ, delay,

customer-specific effects, etc.

The bulk of each overlay is stored in ROM within the CS485xx, but a small image is required to configure the overlays and

boot the DSP. This small image can either be stored in an external serial FLASH/EEPROM, or downloaded via a host

controller through the SPI

™

serial port.

The overlay structure reduces the time required to reconfigure the DSP when a processing change is requested. Each

overlay can be reloaded independently without disturbing the other overlays. For example, when a new matrix-processor

is selected, the OS, virtualizer-, and post-processors do not need to be reloaded — only the new matrix-processor (the

same is true for the other overlays).

Table 3-1 lists the firmware available based on device selection. Refer AN298, CS485xx Firmware User’s

Manual for the latest listing of application codes and Cirrus Framework

™ modules available.

Table 3-1. Device and Firmware Selection Guide

Device Suggested Application Channel Count Input/Output Package

CS48520-CQZ Digital TV, portable audio docking station, portable DVD, DVD mini/

receiver, multimedia PC speakers

Up to 4-channel in/4-channel out 48-pin QFP

CS48540-CQZ

CS48540-DQZ

CS48520 features plus 8-channel car audio, DVD receiver Up to 8-channel in/8-channel out 48-pin QFP

CS48560-CQZ

CS48560-DQZ

CS48540 features plus 12-channel car audio, high-end digital TV, dual

source/dual zone SACD

Up to 12-channel in/12-channel out 48-pin QFP

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P23

CS48560-DQZR

Mfr. #:

Buy CS48560-DQZR

Manufacturer:

Cirrus Logic

Description:

Audio DSPs IC HghPrfrmnc 32-bit Audio Decoder DSP

Lifecycle:

New from this manufacturer.

Delivery:

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CS48560-DQZR

CS48560-DQZR

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