I try with this code
MCG -> C1 = 0x2AU;
MCG -> C2 = 0x20U;
MCG -> C4 = 0x00U;
MCG -> C5 = 0x09U;
MCG -> C6 = 0x58U;
MCG -> SC = 0x00U;
OSC -> CR = 0x80;
SIM -> SOPT1 = 0x000C0000UL;
SIM -> SOPT2 = 0x00010000UL;
SIM -> CLKDIV1 = 0x01140000UL;
but when i am debugging, after SystemCoreClockUpdate(), i get SystemCoreClock = 192 000 000
Thanks, I tried with the blinky example first. now i understand clearly!