| 摘要 |
<p>PURPOSE:To reduce the power consumption of a processor with a simple constitution of circuit, by controlling the frequency of the clock with the control signal supplied from the processor having the cycle speed corresponding to the clock frequency. CONSTITUTION:When performing the process of the high-speed terminal 3, the processor 1 makes the clock frequency control circuit 2 select the high frequency clock 6 by the control output 9. In the same way, the intermediate and low frequency clocks 7 and 8 are selected respectively in case the intermediate and low speed terminals 4 and 5. As a result, the machine cycle frequency of the processor 1 becomes lower as the terminals 5, 4 and 3 are processed in that order. Accordingly, the power consumption of the processor 1 of CMOS decreases in the above-mentioned order.</p> |
