Chapter 4: digital audio input interface, 1 introduction, 2 digital audio input port description – Cirrus Logic CS485xx User Manual
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Copyright 2009 Cirrus Logic, Inc.
DS734UM7
Introduction
CS485xx Hardware User’s Manual
Chapter 4
Digital Audio Input Interface
4.1 Introduction
CS485xx supports a wide variety of audio data formats through various input and output ports. Hardware
availability is entirely dependent on whether the software application code being used supports the required
mode. This data sheet presents most of the modes available with the CS485xx hardware. However, not all of
the modes are available with any particular piece of application code. The Application Code User’s Guide for
the particular code being used should be referenced to determine if a particular mode is supported. In
addition, if a particular mode is desired, but not presented, please contact your sales representative
regarding its availability.
4.2 Digital Audio Input Port Description
The CS485xx Digital Audio Input ports (DAI1 and DAI2) are designed to provide either five digital audio input
pins (up to 10 channels total) or six digital audio pins (up to 12 channels) depending on the mode of
operation configured. The pins can be configured to load audio samples in a number of formats, or accept
multiple stereo channels on a single input pin.
DAI features include:
•
Five Digital Audio Input Pins Capable of Supporting Many Audio Formats with Dual Clock Domains
on CS48560
•
Four Digital Audio Input Pins Capable of Supporting Many Audio Formats with Dual Clock Domains
on CS48540
•
Two Digital Audio Input Pins Capable of Supporting Many Audio Formats with Dual Clock Domains
on CS48520
•
Two Independent Input Clock Domains (DAI1_SCLK/DAI1_LRCLK or DAI2_SCLK/DAI2_LRCLK)
•
Six Digital Audio Input Pins when Configured for Single Clock Domain Operation on CS48560
•
Four Digital Audio Input Pins when Configured for Single Clock Domain Operation on CS48540
•
Two Digital Audio Input Pins when Configured for Single Clock Domain Operation on CS48520
•
Up to 32-bit Data Widths
•
Sample Rates up to 192 kHz
•
Two Simultaneous Audio Streams with Different Sample Frequencies (Fs) for Dual-path Processing
Support
•
2, 4, or 6 Channels on a Single Pin (DAI_DATAx)