Yes, but in erratasheet not fixed.I would like to work at low frequencies with quartz stability. But HSE quartz consumes a lot of energy (above 1mA)... It seems that you will have to work at a frequency above 2 MHz

1MHz is always off 1.5%, good temperature stability. When I turn off the LSE, the frequency is 998 kHz and is very temperature dependentRCC_CR.MSIPLLEN SET_BIT(RCC->CR, RCC_CR_MSIPLLEN) ;

Set measured Error %100000 98306 1,694200000 196614 1,693400000 393227 1,69325800000 786453 1,6933751000000 1015836 -1,58362000000 1998902 0,05494000000 3997804 0,05498000000 7995608 0,054916000000 15991217 0,0548937524000000 239898...

at lower frequencies below 1Mhz MSI get wrong freq, wen i set freq abowe 1 MHz MSI work well.LSE actually running.I see this in the care of the frequency when heating and cooling the chip. Indeed, auto-tuning works excellently. When I turn off the MS...

Thanks for the answer, but it's too complicated for me.Is it really impossible to make the standard conclusion work without such serious corrections?