SEMICONDUCTOR DEVICE AND ABNORMALITY DETECTING METHOD
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United States of America Patent
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Issued Date -
Dec 2, 2010
app pub date -
May 26, 2010
filing date -
May 28, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A semiconductor device comprises: a task state storage configured to store an executing state of a processing task of software executed by a CPU and to output an executing state signal to show the executing state of the processing task; a task validity judging section configured to acquire an interruption signal corresponding to the processing task based on a control of the CPU and the execution state signal, and to output a valid signal when the processing task is executed validly; a clear signal output section configured to output a clear signal in response to the valid signal; and a watchdog timer configured to clear a timer count value when the clear signal is acquired within a prescribed time and to output a reset signal when the clear signal is not acquired within the prescribed time.
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