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Contents
Peripheral AudioEdit
The Audio interface available on ETRA SOM is based on STM32MP1 SoC which provides the following audio subsystems:
- Synchronous Audio Interface (SAI)
- 4x I2S/SAI (16+ channels, each up to 32-bits @192 kHz)
- Two independent audio subblocks which can be transmitters or receivers with their respective 8-word integrated FIFOs
- Sony/Philips Digital Interface (SPDIF)
- S/PDIF Tx/Rx
DescriptionEdit
The I2S (Inter IC Sound) module provides a synchronous audio interface (SAI) that supports full- duplex serial interfaces with frame synchronization such as I2S, LSB or MSB-justified, AC'97, TDM, and PCM/DSP interfaces.
It supports the following standards and features:
- Two independent audio subblocks
- Synchronous or asynchronous mode between the audio subblocks
- Possible synchronization between multiple SAIs
- Master or slave configuration independent for both audio subblocks
- 2-channel DMA interface
The Sony/Philips Digital Interface (SPDIF) audio block is a stereo transceiver that allows the processor to receive and transmit digital audio.
Pin mappingEdit
The Pin mapping is described in the Pinout table section