MSPM0L2227: Is it possible to improve clock accuracy by inputting CLK_out sourced from LFOSC into FCC?

Hi Ito,

LFOSC can't be adjusted so there would be no improvement on the LFCLK. The FCC can be used to check accuracy and compensate which would require one of the 2 sources to be accurate.

If you had an HFXT or you used the SYSOSC FCL + External ROSC, you could find some error % of the LFOSC. With SYSOSC being +-1.2% you don't get much advantage over the LFOSC accuracy, but with a accurate external clock you can get better defined accuracy.

FYI - Alternatively on the SYSOSC, you can trim the clock with ROSC to a +- 50kHz, so you can do real time calibration if you had an LFXT.