ADSP-21368 SHARC Processor Hardware Reference 9-1
9 S/PDIF
TRANSMITTER/RECEIVER
S/PDIF (Sony/Philips Digital Interface) is a standard audio data transfer
format that allows the transfer of digital audio signals from one device to
another without having to be converted to an analog signal. The
ADSP-21367/8/9 and ADSP-2137x processors have AES3-compliant
S/PDIF receivers/transmitters that allow programs to interface to other
S/PDIF devices.
This chapter provides information on the function of the S/PDIF module
in the ADSP-21367/8/9 and ADSP-2137x SHARC processors. It is
important to be familiar with the serial digital audio interface standards
IEC-60958, EIAJ CP-340, AES3, and AES11.
The S/PDIF receiver and transmitter reside in the digital audio interface
(DAI). This allows applications to use the serial ports and/or the external
DAI pins to interface to other S/PDIF devices. This can include using the
receiver to decode incoming bi-phase encoded audio streams and passing
them through the SPORTs to internal memory for processing or using the
transmitter to encode audio or digital data and transfer it to another
S/PDIF receiver in the audio system. Other features include:
• Managing user status information and providing error-handling
capabilities in both the receiver and transmitter.
• Transmitting a bi-phase encoded signal that may contain any num-
ber of audio channels (compressed or linear PCM) or encoded data
streams.
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