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CDB8415A Datasheet(PDF) 11 Page - Cirrus Logic |
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CDB8415A Datasheet(HTML) 11 Page - Cirrus Logic |
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11 / 42 page  CS8415A 11 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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