| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a periodic signal processing apparatus for processing a periodic signal while properly synchronizing with the periodic signal output by the signal source without an increase of consuming current or without inviting an increase in cost. <P>SOLUTION: The periodic signal processing apparatus includes a task switching timer 8 for outputting a task switching signal to a CPU 2. The CPU 2 performs edge detecting of driving rectangular wave signal output by accompanying vibration operation of a sensor 10 in the signal process task, sets the counted data to the task switching timer 8 when having detected the edge, and starts the sensor signal processing after releasing the forbidden state of interruption. The task switching timer 8 is set so as to forbid to interrupt to the CPU 2 just before the end of time counting based on the counted data, and out puts the task switching signal for making the CPU 2 perform the signal process task when the time counting is ended. <P>COPYRIGHT: (C)2009,JPO&INPIT |
