Halts the clock supplied to the 8-bit interval timer.
Remark         
Calling this API function changes the 8-bit interval timer to reset 
status.
For this reason, writes to the control registers after this API 
function is called are ignored.
[Syntax]
void R_IT8bitm_Channeln_Set_PowerOff ( void );
Remark m is the unit number, and n is the channel number.
[Argument(s)]
None.
[Return value]
None.