What is the meaning of NRF_CLOCK_LFCLKSRC_RC_250_PPM_250MS_CALIBRATION

[hark]

Hi, What is the meaning of "NRF_CLOCK_LFCLKSRC_RC_250_PPM_250MS_CALIBRATION"?

It means use the internal RC clock source, but what is the meaning of "250_PPM_250MS_CALIBRATION" ? Thanks.

[RK]

It means the RC is calibrated every 250ms to an equivalent resolution at least as good as a 250PPM LF crystal.

[hark]

Thanks，Get it.