RE: how can i measure the HFINT frequency?

Tancher — Mon, 10 Jun 2019 13:53:43 GMT

I will try to use timer in capture mode from HFINT (HFINT->PCLK16M). And make pulse from RTC module (LFXO).

RE: how can i measure the HFINT frequency?

Jared — Fri, 07 Jun 2019 12:03:41 GMT

Hi,

The frequency of the HFINT is 64 MHz with min <±1.5% and max <±6%.

I don't think that you can measure the frequency in software with high enough accuracy, you can try to measure directly on the crystal if you have a probe with low enough capacitance, but i'm not sure if that will work.

Regards

Jared