CS485xx Family Data Sheet

32-bit Audio Decoder DSP Family

DS734F3

Copyright 2009 Cirrus Logic, Inc.

5

CONFIDENTIAL

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. 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. 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.