Difference between revisions of "ORCA SOM/ORCA Hardware/Peripherals/Audio"
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==Peripheral Audio == | ==Peripheral Audio == | ||
| − | + | 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 === | === Description === | ||
| − | The | + | 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 | + | 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=== | ===Pin mapping=== | ||
Revision as of 14:58, 3 February 2021
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| History | |||
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| Version | Issue Date | Notes | |
| 1.0.0 | Feb 2021 | 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
