CS48DV2B Data Sheet

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

DS875F2

Copyright 2009 Cirrus Logic

5

CONFIDENTIAL

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

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.

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.