| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to always generate an event signal at a constant time interval without varying the cycle of the event signal of an interval timer device even if a frequency-dividing ratio of a count clock is chamged over. SOLUTION: A frequency dividing circuit 110 performs the frequency division of an inputted clock to generate a count clock. An adder 102, an initial value register 103, a counter value selector 104 and a counter 105 constitute an upcounter to update a count value in the unit of a predetermined discrete value in synchronization with the count clock. In this case, the discrete value corresponds to a frequency division ratio in the frequency dividing circuit 110, and a discrete value selector 101 selects a predetermined value. When the count value reaches a predetermined comparison value, a comparator 107 outputs an event signal. COPYRIGHT: (C)2007,JPO&INPIT
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