Newcomer questions~Why the "SystemCoreClock" is 16000000Hz ?

[ZeroOne]

I used Cubemx to configured the system clock to 180MHz. Why is the system clock in the generated project code...... 6 zeros...... 16MHz:grinning_face_with_sweat:? Can I change 16MHz to 180MHz?It simply changes the number after "SystemCoreClock" to 180000000？

[Tesla DeLorean · Accepted solution]

MCU starts from an internal clock, when you get the external clocks and PLL running the value will be adjusted.​