Mode monitoring device of microcomputer
专利汇可以提供Mode monitoring device of microcomputer专利检索，专利查询，专利分析的服务。并且PURPOSE: To prevent securely control abnormality in wrong operation mode, by monitoring the operation mode and outputting a mode abnormality signal when a predetermined operation mode is not selected, and thus reporting that to the outside.
CONSTITUTION: An instruction for inverting the signal level of a specific terminal PR of an I/O port every time the control program of a microcomputer 10 is executed once is incorporated in the control program and when the program is executed normally, the program signal which is inverted periodically is outputted from the terminal PR. When the program run signal is not inverted even a specific period later, a watch dog timer 14 provided as an external circuit decides on that and resets the microcomputer 10. The output Q of the timer circuit 14 is connected to the base of a transistor 18 (TR) through an inverter 16 and a resistance R, and the alarm lamp 20 is connected the base of the TR18.
COPYRIGHT: (C)1983,JPO&Japio，下面是Mode monitoring device of microcomputer专利的具体信息内容。
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