专利汇可以提供Cpu run-away monitoring circuit专利检索,专利查询,专利分析的服务。并且PURPOSE:To prevent the malfunction of a CPU run-away monitoring circuit by providing a gate circuit in the output side of a watchdog timer circuit, thereby preventing sending out of an abnormal signal from this circuit. CONSTITUTION:The power source is turned on and the system is started. The CPU18 performs processing normally, and long time initial processing is performed at a software reset time. Accordingly, as an access time to the first watchdog timer WDT circuit 13 exceeds the reference time; an abnormal signal is given by a monostable multivibrator of the WDT circuit 13 due to the noise of a power source. However, data stored in an ROM 19 is held in a controlling register 16 by the output of the second address decoding circuit 12 through a data bus interface circuit 17 and an interface circuit 15. Accordingly, a gate circuit 14 is retained in a closed state, and the abnormal signal US is not outputted.,下面是Cpu run-away monitoring circuit专利的具体信息内容。
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