weixin_39768645 2020-11-29 23:17
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Add MCK audio timing output to I2S

CircuitPython does not implement MCK out for I2S, digital audio, which is fine for audio DACs that create their own. However, other audio DACs require this clock. MCK out should be implemented.

该提问来源于开源项目：adafruit/circuitpython

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  • weixin_39768645 2020-11-29 23:17
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    Names: The I2S signals are SCK (BCK), WS (LRCK) and SD. There is also an optional MCK constrained to a multiple of WS. The SAM D5x/E5x Family Data Sheet uses the names SCK, FS, SDO/SDI and MCK, respectively. The STM32 data sheet uses the names CK, FS, SD and MCK.

    Need: Many audio codecs and DACs need an MCK. The following are a few 3.3V+5V audio DACs that need an MCK. WM8741 CS4398 AK4495EQ/SEQ PCM1792

    Next: Implementability on CircuitPython boards. API considerations. Related enhancements and quirks.

    Noob: There is no reason to assume I know a lot about this.

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