Semiconductor integrated circuit employing power management device and power management method for the semiconductor integrated circuit

摘要

A semiconductor integrated circuit has a CPU for executing various processes, at least one hardware module for receiving instructions from the CPU and executing the instructions, and a power management device for controlling the supply of a clock signal to the CPU so as to stop the clock signal to the CPU if the CPU has an idle time to start the next process. The power management device stops the supply of the clock signal to the CPU during a period in which the CPU can sleep, thereby reducing the power consumption of the CPU.