| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a frequency control circuit in which power consumption can be reduced without increasing the variation of a clock frequency. SOLUTION: This frequency control circuit is provided with a control circuit 15 for outputting a first control signal S151 to a clock supplying circuit 12 when a through-put T is requested in order to instruct the clock supplying circuit 12 to decide two clock frequencies and each period from the value of the through-put T and the value of a through-put to be realized from a clock frequency which can be generated by the clock supplying circuit 12, and to select those two clock frequencies in each decided period, and to output it as a system clock, and for outputting a second control signal S152 to a power supply voltage supplying circuit 13 in order to instruct the power supply voltage supplying circuit 13 to supply a power supply voltage with which the operation of a target circuit can be ensured in each of those two clock frequencies instructed to the clock supply circuit 12.</p> |
