Serial audio interface (SAI) RM0440
1792/2126 RM0440 Rev 4
40 Serial audio interface (SAI)
40.1 Introduction
The SAI interface (Serial audio interface) offers a wide set of audio protocols due to its
flexibility and wide range of configurations. Many stereo or mono audio applications may be
targeted. I2S standards, LSB or MSB-justified, PCM/DSP, TDM, and AC’97 protocols may
be addressed for example. SPDIF output is offered when the audio block is configured as a
transmitter.
To bring this level of flexibility and reconfigurability, the SAI contains two independent audio
subblocks. Each block has it own clock generator and I/O line controller.
The SAI works in master or slave configuration. The audio subblocks are either receiver or
transmitter and work synchronously or not (with respect to the other one).
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