2-1
Copyright 2012 Cirrus Logic, Inc.
DS886DB9
Introducing the CDB47xxx Customer Development Kit
CDB47xxx User’s Manual
Chapter 2
Introduction to CDB47xxx Kit
2.1 Introducing the CDB47xxx Customer Development Kit
The CDB47xxx kit is composed of the CDB47xxxS or CDB47xxxD main board and a daughtercard that
can support any member of the CS470xx Audio SOC (ASOC) family. The CDB47xxx provides a practical
platform for emulating a typical multi-channel audio system application. The system can be an
independent evaluation platform controlled by the on-board MCU, or using the USB connector, the CDB
can be connected to a host PC which can configure and control the board using DSP Composer, the
Cirrus Proprietary GUI.
shows the relationship between the CDB47xxx and the optional PC.
Figure 2-1. CDB47xxx System Block Diagram
This document will concentrate on the features and basic operation of the CDB47xxx kit. Detailed
information regarding the operation and programming of the CS470xx Audio SOC is covered by the
CS470xx
Data Sheet
,
CS470xx Hardware User’s Manual
and application note AN333. See
for more details.
The CDB47xxx is a convenient and easy-to-operate evaluation platform. It has been designed to
demonstrate the majority of the CS470xx functions on a small base board. These features include:
• PC control of the CS470xx using the DSP Composer
™
graphical user interface.
• Serial control of audio devices on CDB47xxx via I
2
C
™
or SPI
™
protocols.
• Digital audio input of PCM or compressed data via optical or coaxial S/PDIF.
• Up to 4 channels of simultaneous analog audio input via the integrated ADCs of the CS470xx.
• The 5:1 analog multiplexer integrated into one of the CS470xx ADCs.
• Up to 8-channel analog output via the integrated DACs of the CS470xx.
• Digital audio output of PCM data via optical or coaxial S/PDIF.
• Multi-channel digital audio input via the DAI serial audio (I
2
S) header.
• Capability to support fixed output Fs that is independent of input Fs.
CDB47xxx
USB Port
PC
OPTIONAL
