| 摘要 |
<p>PROBLEM TO BE SOLVED: To greatly reduce the power consumption by placing an MPU in fast operation without stopping a clock when the process load on the MPU is heavy and stopping the clock for as a long time as possible when the load is light. SOLUTION: The MPU 1 outputs a register update signal S1 indicating whether or not a register has been updated and a stall signal S2 indicating whether or not the MPU 1 is in a stall state. The value that a register update frequency counter 106 holds is increased or decreased, or held as it is according to the signals S1 and S2. A clock stop inhibition part 105 decides the process load on the MPU 1 by using the count value. According to the decision result, a clock supply control part 102 controls the clock supply to the MPU 1.</p> |
