Halts the clock supplied to the clock/buzzer output controller.
Remark 
1.      Calling this API function changes the 
clock/buzzer output controller to reset status.
For this reason, writes to 
the control registers after this API function is called are ignored.
Remark 
2.      This API function stops the clock supply to the 
clock/buzzer output controller, 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-time 
clock).
[Syntax]
void R_PCLBUZn_Set_PowerOff ( void );
Remark n is the output pin.
[Argument(s)]
None.
[Return value]
None.