SD_MODE pin connection to the Pinout

pimoroni / speaker-phat

Software installer for Speaker pHAT

MIT License

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SD_MODE pin connection to the Pinout #25

Closed Sureshsepg closed 5 years ago

Sureshsepg commented 6 years ago

Hi, I have a question on the Pin out. Where is the SD_MODE pin of the DAC routed to the Pin out, is it the BCM21(I2S) pin or is it a different pin., I need to enable this pin separately for enabling the audio in Android-things running on Raspberry pi. As shown on this stack overflow thread link. Thanks for your support in advance.

Gadgetoid commented 5 years ago

The SD_MODE pin is not broken out. It's, effectively, tied on since it's used, with accompanying circuitry, to enable the amp when the PCM frame-sync is detected. This prevents an issue on the Pi/Raspbian where, if I remember correctly, the PCM clock would be running without frame-sync or data which is a huge no-no for this amp, and basically turned it into a tiny heater.