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low frequency calibration interval

energy

Hi,

I have read the following posts and understand how low clock frequency mode can be selected

devzone.nordicsemi.com/.../

I've also read in many posts that 4s calibration interval is fine for most case

What parameter/use case have impact for selecting the calibration interval ? In which case we should reduce or increase the calibration interval ?

My goal is to have BLE working (advertising interval 1s + connected mode) and 1000 ppm accuracy on RTC timer

I am using sdk 9 and 10. Is the calibration based on temperature check experimental ?

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    Hi,

    Please see Stians more in depth answer on the calibration interval. The LFRC when calibrated runs at +/- 250 ppm.

    What calibration in SDK 9 and 10 are you referring to?

    RC clock calibration is implemented by the SoftDevice and is not experimental, it is required to make the chip work without a separate LF crystal in BLE mode.

    Best regards,

    Øyvind

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  • 0

    Hi,

    Please see Stians more in depth answer on the calibration interval. The LFRC when calibrated runs at +/- 250 ppm.

    What calibration in SDK 9 and 10 are you referring to?

    RC clock calibration is implemented by the SoftDevice and is not experimental, it is required to make the chip work without a separate LF crystal in BLE mode.

    Best regards,

    Øyvind

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