15.6.3 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 have frequencies as indicated in the CPUDIV registers and will generate an interrupt request if INTENSET.CKRDY is '1'.

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

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