I chip micro computer
专利汇可以提供I chip micro computer专利检索，专利查询，专利分析的服务。并且PURPOSE: To guarantee an action when a power voltage is low by constituting the subject computer by including a low voltage detection circuit, a low voltage detection flag showing that a system is in the middle of a low voltage action and a clock modulation circuit which temporarily masks a clock with the use of a signal line controlling a circuit where an action frequency is reduced the most when the voltage is low.
CONSTITUTION: When the power voltage is low, the low voltage detection circuit 111 makes a detection signal 113 active, and makes the flag 120 active in synchronizing with a clock 107. When CPU 101 makes a control signal 110 active at this time, a clock mask permission signal 109 becomes active in the period of a pulse signal 121 which an edge detection circuit 106 is generated. Thus, a clock mask unit 105 masks a clock 104 generated by an oscillator 103 only in a period when the clock mask permission signal 109 is active to generate the clock 107, and supplies it to CPU 101 and a peripheral circuit unit 102. Thus, a defect that a processing capacity is reduced when the power voltage is low is eliminated.
COPYRIGHT: (C)1990,JPO&Japio，下面是I chip micro computer专利的具体信息内容。
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