| 摘要 |
To allow changes in period and duty ratio at a desired timing without control of the timing for setting values of the period and duty ratio by a CPU, a unit 1 for storing a plurality of values of periods, a unit 2 for storing a plurality of values of duty ratios, a circuit 3 for counting the number of input clock pulses, a circuit 4 for outputting an agreement signal when the output of the circuit 3 and a value stored in the unit 2 agree with each other, a circuit 5 for outputting a pulse signal at a determined point, which is the output of the agreement signal, and a circuit 6 for selecting any period of the periods stored in the unit 1 in response to input of a control signal and outputting a value corresponding to the selected period to the unit 2 , are comprised.
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