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CS8415A-IZ

96 kHz Digital Audio Interface Receiver

Cirrus Logic 

CS8415A

3. GENERAL DESCRIPTION

The CS8415A is a monolithic CMOS device which

receives and decodes audio data according to the

AES3, IEC60958, S/PDIF, and EIAJ CP1201 inter-

face standards.

Input data is either differential or single-ended. A

low jitter clock is recovered from the incoming data

using a PLL. The decoded audio data is output

through a configurable, 3-wire output port. The

channel status and user data are assembled in

block sized buffers and may be accessed through

an SPI or I2C microcontroller port. For systems

with no microcontroller, a stand alone mode allows

direct access to channel status and user data out-

put pins.

Target applications include AVR, CD-R, DAT,

DVD, multimedia speakers, MD and VTR equip-

ment, mixing consoles, digital audio transmission

and receiving equipment, high quality D/A and A/D

converters, effects processors, set-top TV boxes,

and computer audio systems.

Figure 5 shows the supply and external connec-

tions to the CS8415A, when configured for opera-

tion with a microcontroller.

3.1 AES3 and S/PDIF Standards

Documents

This data sheet assumes that the user is familiar

with the AES3 and S/PDIF data formats. It is advis-

able to have current copies of the AES3 and

IEC60958 specifications on hand for easy refer-

ence.

The latest AES3 standard is available from the Au-

dio Engineering Society or ANSI at www.aes.org or

www.ansi.org. Obtain the latest IEC60958 stan-

dard from ANSI or from the International Electro-

technical Commission at www.iec.ch. The latest

EIAJ CP-1201 standard is available from the Jap-

anese Electronics Bureau.

Cirrus Logic Application Note 22: Overview of Dig-

ital Audio Interface Data Structures contains a use-

ful tutorial on digital audio specifications, but it

should not be considered a substitute for the stan-

dards.

The paper An Understanding and Implementation

of the SCMS Serial Copy Management System for

Digital Audio Transmission, by Clifton Sanchez, is

an excellent tutorial on SCMS. It is available from

the AES as preprint 3518.

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