This flag is cleared by writing a '1' to the flag.

This flag is set when the synchronous CPU, APBx, and AHBx clocks have frequencies as indicated in the CLKCFG registers and will generate an interrupt if INTENCLR/SET.CKRDY is '1'.

Writing a '0' to this bit has no effect.

Writing a '1' to this bit clears the Clock Ready interrupt flag.