Remarks 1.

Calling this API function changes the 12-bit interval timer to reset status.
For this reason, writes to the control registers after this API function is called are ignored.

Remarks 2.

This API function stops the clock supply to the 12-bit interval timer, by operating the RTCEN bit of peripheral enable register n.
For this reason, this API function also stops the clock supply to other peripheral devices sharing the RTCEN bit (e.g. real-timer clock).

void    R_IT_Set_PowerOff ( void );