| 摘要 |
PURPOSE:To execute automatic reset by resetting a latched data, when the following data is not inputted before a timer whose period is larger than a necessary period provided on a circuit for inputting a digital output from a processor in said necessary period is operated. CONSTITUTION:A digital data is outputted from a processor 1 in a period T11 of a built-in timer TM1. A digital outputting circuit 2 inputs said digital data to a set terminal S of an FF, and sends it out as a digital signal output to a part to be controlled of the outside of the figure. A timer TM2 contained in the digital outputting circuit 2 starts to count at the same time as the timer TM1, and its count-up period T22 is set larger than T11, and it is connected to a reset terminal of the FF. In this way, when the following digital data is not inputted before attaining to a time-out period T22 due to a fault of software, etc.; the FF is reset, the digital signal output is stopped, the automatic reset is executed, and the device is protected.
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