ORCA SOM/ORCA Hardware/Peripherals/Audio
| HOME | SOMs | SBCs | ToloMEO Embedded Assistant |  GET A QUOTE
|
 ONLINE HELPDESK
|
| Roadmap | IoT Services | ML/AI services | Embedded Design Services |
| History | |||
|---|---|---|---|
| Issue Date | Notes | ||
| 2021/02/03 | First release | ||
Peripheral Audio[edit | edit source]
The Audio interface available on ORCA SoM is based on iMX8MPlus SoC which provides the following audio subsystems:
- Synchronous Audio Interface (SAI)
- 6x I2S/SAI
- Sony/Philips Digital Interface (SPDIF)
- PDM microphone interface
- eARC
Description[edit | edit source]
The I2S module provides a synchronous audio interface (SAI) that supports full-duplex serial interfaces with frame synchronization such as I2S, AC97, TDM, and codec/DSP interfaces. It supports the following standards and features:
- Transmitter and receiver with independent bit clock and frame sync supporting 8 data lines
- Receiver with independent bit clock and frame sync supporting 8 data lines
- Each data line can support a maximum Frame size of 32 words
- Asynchronous 128 x 32-bit FIFO for each transmit and receive data line
- Supports packing of 8-bit and 16-bit data into each 32-bit FIFO word
- Supports combining multiple data line FIFOs into single data line FIFO
- Independent 32-bit timestamp counters and bit counters for monitoring transmit and receive progress
The Sony/Philips Digital Interface (SPDIF) audio block is a stereo transceiver that allows the processor to receive and transmit digital audio.
The PDM Microphone Interface (MICFIL) includes the following features:
- Decimation filters:
- Fixed filtering characteristics for audio application.
- 24-bit signed filter output.
- Maximum dynamic range: 120dB.
- Internal clock divider for a programmable PDM clock generation.
- Full or partial set of channels operation with individual enable control.
- Programmable decimation rate.
- Programmable DC remover.
- Range adjustement capability.
- FIFOs with interrupt and DMA capability.
- Each FIFO with 32 entries length.
- Hardware Voice Activity Detector (HWVAD).
- Interrupt capability.
- Zero-Crossing Detection (ZCD) option.
The enhanced audio return channel (eARC) provides an advanced audio stream through the HDMI interface.
The asyncronous sample rate converter (ASRC) is a digital module that converts audio from a source sample rate to a destination sample rate.
The primary features for the ASRC are as follows:
- 4 Contexts - groups of channels with an independent time base
- Fully independent and concurrent context control
- Simultaneous processing of up to 32 audio channels
- Programmable filter charachteristics for each context
- 32, 24, 20, and 16-bit fixed point audio sample support
- 32-bit floating point audio sample support
- 8kHz to 384 kHz sample rate
- 1/16 to 8x sample rate conversion ratio
- Software control of fine conversion ratio
Pin mapping[edit | edit source]
The Pin mapping is described in the Pinout table section
