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CC2650: I2S maximum sampling frequency support

Raj Sinha
Prodigy 100 points
Part Number: CC2650


Hello All,

I wanted to know about the CC2650 i2s maximum sampling frequency support.

Also, if we enable UART print on serial console then what is the maximum sampling frequency we can achieve using CC2650 chip.

Any help will be appreciated.

Regards,

Raj

  • 0
    TI__Guru 56590 points
    I asked a colleague to who might know to take a look at it next week. Thanks for your patience.
  • 0 in reply to Eirik V
    Prodigy 100 points

    ok Eirik. Will wait for your response.

    Thanks

  • 0 in reply to Raj Sinha
    TI__Mastermind 33460 points
    Hello Raj,

    I have the following questions to help me better understand your use case:

    1. Do you plan on using the I2S driver that is currently released on our GitHub page github.com/.../ or the PDM driver that is shipped in the SDK? Both of these drivers support a fixed 16kHz only sampling rate. They may be expanded to support other sample rates in the future, but this all that is supported today.

    2. Do you plan to spin up your own implementation using driverlib?

    If yes to #2, then max frequency supported by PRCMAudioClockConfigSet() is 48kHz. This can be overridden using PRCMAudioClockConfigSetOverride(), but that is not recommended.

    UART should not affect I2S sampling speed so long as the interrupts are kept neat enough and UART processing isn't preventing the I2S interrupts from running.