CS8406-IS Cirrus Logic, CS8406-IS Datasheet - Page 13

• Manufacturer Part Number: CS8406-IS
• Description: 192 KHZ DIGITAL AUDIO INTERFACE TRANSMITTER
• Manufacturer: Cirrus Logic

CS8406
3. GENERAL DESCRIPTION
The CS8406 is a monolithic CMOS device which encodes and transmits audio data according to
the AES3, IEC60958, S/PDIF, and EIAJ CP1201 interface standards. The CS8406 accepts au-
dio, channel status and user data, which is then multiplexed, encoded, and driven onto a cable.
The audio data is input through a configurable, 3-wire input port. The channel status bits and user
bit data are input through an SPI or I²C Mode microcontroller port and may be assembled in sep-
arate block sized buffers.
For systems with no microcontroller, a stand alone mode allows direct access to channel status
and user data input pins.
Target applications include CD-R, DAT, DVD, MD and VTR equipment, mixing consoles, digital
audio transmission equipment, high quality A/D converters, effects processors, set-top TV box-
es, and computer audio systems.
Figure 5 shows the supply and external connections to the CS8406 when configured for opera-
tion with a microcontroller. Figure 6 shows the supply and external connections to the CS8406
when configured for operation without 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
advisable to have current copies of the AES3 and IEC60958 specifications on hand for easy ref-
erence.
The latest AES3 standard is available from the Audio Engineering Society or ANSI at
www.aes.org or www.ansi.org. Obtain the latest IEC60958 standard from ANSI or from the Inter-
national Electrotechnical Commission at www.iec.ch. The latest EIAJ CP-1201 standard is avail-
able from the Japanese Electronics Bureau.
Application Note 22: Overview of Digital Audio Interface Data Structures contains a useful tutorial
on digital audio specifications, but it should not be considered a substitute for the standards.
The paper An Understanding and Implementation of the SCMS Serial Copy Management Sys-
tem for Digital Audio Transmission , by Clifton Sanchez, is an excellent tutorial on SCMS. It is
available from the AES as reprint 3518.
DS580F1
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