5

DS734F5

1 Documentation Strategy

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.