LFCLK calibration while RTC is running

RE: LFCLK calibration while RTC is running

Vidar Berg — Tue, 28 May 2024 12:24:05 GMT

The difference is that the clock driver implementation is asynchronous and non-blocking.

RE: LFCLK calibration while RTC is running

Lars-Christian — Tue, 28 May 2024 12:21:46 GMT

Ok. Thank you. Does that mean that the Clock driver can do a faster calibration than the method used above? Or that it can calibrate simultaneously wih the RTC running?

RE: LFCLK calibration while RTC is running

Vidar Berg — Tue, 28 May 2024 12:15:34 GMT

Thanks for confirming. In that case, I would recommend you consider using the Clock driver to calibrate your LFRC oscillator against the HFXO.

RE: LFCLK calibration while RTC is running

Lars-Christian — Tue, 28 May 2024 12:11:39 GMT

I'm using the nRF5 SDK and no BLE.

RE: LFCLK calibration while RTC is running

Vidar Berg — Tue, 28 May 2024 12:08:07 GMT

Hello,

Which SDK are you using, the nRF5 SDK or the nRF Connect SDK? Also, are you using BLE? If BLE is enabled, the protocol stack will periodically calibrate the LFRC in the background (interrupt driven) to ensure the LF clock meets the 500 ppm accuracy requirement set by the specification.

Best regards,

Vidar