| 摘要 |
PURPOSE:To deal with the switching of a low power consumption operation and a normal operation by selecting one kind of prescribed time corresponding to the cycle of a cyclic signal out of plural kinds of prescribed time and outputting a control part reset signal to a control part when no cyclic signal is detected within that one kind of prescribed time. CONSTITUTION:A microcomputer 13 is provided with the control part equipped with two operating states of the low power consumption operation and the normal operation to be operated by a synchronizing clock as a synchronizing signal in a short cycle. When two operating states are switched by this control part, a switching signal 19 is outputted to a switch 16. This switch 16 switches a terminal 16a on the output side of a counter circuit 13a and a terminal 16b on the output side of a counter circuit 13b corresponding to the switching signal 19 and is operated as a prescribed time selecting means and a control part reset signal output means or as a count value selecting means and a control part reset signal output means for outputting the reset signal to the microcomputer 14. Therefore, even when the cycle of the cyclic signal is changed, no malfunction occurs. |
