| 摘要 |
<p>PURPOSE:To decrease the power consumption of an information processor by switching a high speed clock to a low speed clock only by a circuit without changing a BIOS(Basic I/O System). CONSTITUTION:When the information processor is operated in a power save mode, a low frequency clock is normally applied to a CPU 10, and then the CPU 10 is operated at a low speed. However, at the time of the generation of a certain specific factor, a signal in forming the fact is transmitted from one of an input and output controller 60, keyboard controller 70, and video circuit 80 to a clock controller 20. The controller 20 which receives a command signal, rises a clock frequency to be applied to the CPU 10 in a fixed period in order to operate the CPU 10 at a high speed. The switching of the clock is operated only by the circuit without using a software. Thus, a holding state can be held by a bus, and the switching of the clock can be operated in a fresh period when the bus is necessarily activated at every fixed period.</p> |
