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Question about GPIO bit rate

gschugschu
in Hardware

From the spec sheet I see that I can use the GPIO as analog as well as digital IO. The voltage ranges are given but unfortunately to the bit depth in case of an analog signal. I would also like to understand the max digitization rate and its implication on how many IOs are used (ie. use of multiplexing).

Thanks Georg

Comments

  • MattMatt

    @gschu the ADC is setup in 10 bit mode for compatibility with older models, but capable of 12 bit. Its capable of 200k samples per second, but actual throughput will be limited by the API/interface methods used for triggering reads. For the best performance you will want to use the timer system to generate local reads vs API requests. Note that you will be limited by radio throughput before multiplexing slows you down.

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