CS48DV2B-CQZR Datasheet CS48DV2B-CQZR, CS48DV2B-DQZR | P4-P6

CS48DV2B Data Sheet

32-bit Audio DSP for Dedicated Dolby Volume and Audistry by Dolby

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List of Figures

Figure 1. RESET Timing ......................................................................................................................................... 12

Figure 2. XTI Timing ............................................................................................................................................... 12

Figure 3. Serial Control Port - SPI Slave Mode Timing........................................................................................... 14

Figure 4. Serial Control Port - SPI Master Mode Timing......................................................................................... 15

Figure 5. Serial Control Port - I

C Slave Mode Timing ........................................................................................... 16

Figure 6. Serial Control Port - I

C Master Mode Timing ......................................................................................... 17

Figure 7. Digital Audio Input (DAI) Port Timing Diagram ........................................................................................ 18

Figure 8. Direct Stream Digital - Serial Audio Input Timing..................................................................................... 18

Figure 9. Digital Audio Output Port Timing, Master Mode....................................................................................... 20

Figure 10. Digital Audio Output Timing, Slave Mode (Relationship LRCLK to SCLK)............................................ 20

Figure 11. CS48DV2B 48-Pin LQFP Pinout Diagram............................................................................................. 23

Figure 12. 48-Pin LQFP Package Drawing............................................................................................................. 24

List of Tables

Table 1. CS48DV2B DSP Related Documentation................................................................................................5

Table 2. Device and Firmware Selection Guide.....................................................................................................7

Table 3. Ordering Information ..............................................................................................................................21

Table 4. Environmental, Manufacturing, & Handling Information.........................................................................22

CS48DV2B Data Sheet

32-bit Audio DSP for Dedicated Dolby Volume and Audistry by Dolby

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1. Documentation Strategy

The CS48DV2B Data Sheet describes CS48DV2B multichannel audio processors. This document

should be used in conjunction with the following documents when evaluating or designing a system

around the CS48DV2B processors.

The scope of the CS48DV2B Data Sheet is primarily the hardware specifications of the CS48DV2B

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

The intended audience for the CS48DV2B Data Sheet is the system PCB designer, MCU

programmer, and the quality control engineer.

2. Overview

The CS48DV2B DSP 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.

The CS48DV2B supports dual input clock domains and dual audio processing paths. The

CS48DV2B is available in a 48-pin QFP package. Please refer to Table 2 on page 7 for the input,

output, firmware features of each device.

2.1 Licensing

Licenses are required for all of the 3

party audio processing algorithms listed in Section 3. Please

contact your local Cirrus Logic Sales representative for more information.

Table 1. CS48DV2B DSP Related Documentation

Document Name Description

CS48DV2B 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.

AN298VPMA,Audistry

by Dolby

®”

Describes API used to control the Audistry firmware

module.

AN298PPMN, Dolby® Volume Firmware User’s

Manual for the CS48DV2x Family

Describes API used to control the Dolby Volume

firmware module.

CS48DV2B Data Sheet

32-bit Audio DSP for Dedicated Dolby Volume and Audistry by Dolby

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3. Code Overlays

The suite of software available for the CS48DV2B DSP 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 (2Ön channels). Examples are Dolby

Pro Logic

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 (nÖ2 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 the Dolby Volume and Audistry by Dolby

firmware, bass management, audio manager, tone control, EQ, delay, and customer-specific

effects

The bulk of each overlay is stored in ROM within the CS48DV2B, 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. This fact is also true for the other overlays.

Table 2 lists the firmware available based on device selection. Please refer to AN298, CS485xx

Firmware User’s Manual for the latest listing of application codes and Cirrus Framework

™ modules

available.

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P26

CS48DV2B-CQZR

Mfr. #:

Buy CS48DV2B-CQZR

Manufacturer:

Cirrus Logic

Description:

Audio DSPs I/C 12 Ch Audio Enhancement Processr

Lifecycle:

New from this manufacturer.

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CS48DV2B-CQZR

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