. . . "If the judgment in the Step S5 is NO, i.e. if it is judged that there is something wrong in the data transfer, such as data being inappropriately transferred or inappropriate data being transferred, the CPU 31 performs error processing (Step S9), and the processing jumps directly to a Step 8 to turn off the internal clock inhibit circuit 36 within the CPU 31 so that the application of the clock si" .