18.8.4 Interrupt Flag Status and Clear

Name: INTFLAG
Offset: 0x03
Reset: 0x01
Property: 

Bit 76543210 
        CKRDY 
Access R/W 
Reset 1 

Bit 0 – CKRDY Clock Ready

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

This flag is set when the synchronous CPU, APBx, and AHBx clocks are stable 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.