Electronic device and power management method,申请号US201313935904-传众专利搜索

Electronic device and power management method

申请公布号：US9377833(B2)

申请号：US201313935904

申请日期：2013.07.05

申请公布日期：2016.06.28

申请人：

VIA TECHNOLOGIES, INC.

发明人：Qin Shuang-Shuang;Yang Xiaolu;Wu Chin-Hwaun

分类号：G06F1/32;G06F1/26

主分类号：G06F1/32

代理机构：

McClure, Qualey & Rodack, LLP

代理人：McClure, Qualey & Rodack, LLP

地址：New Taipei TW

摘要：A power management method for use in an electronic system is provided. The electronic system has a processor and a power management unit. The method has the steps of: when the processor has entered a low power state and an awakening event occurs, calculating a staying time from the time point the processor enters the low power state till the time point the awakening event occurs, wherein the operation voltage of the processor is at a first voltage level in the low power state; and when the processing starts to exit the low power state according to the awakening event, determining a wait time, during which the operation voltage of the processor is recovered to a second voltage level of a working state from the first voltage level, wherein the first voltage level is lower than the second voltage level.

主权项：1. A power management method for use in an electronic system, wherein the electronic system comprises a processor, and a power management unit, the power management method comprising: when the processor has entered a low power state and an awakening event of the processor occurs, calculating by the power management unit a staying time from the time point the processor entered the low power state till the time point the awakening event occurs, wherein an operation voltage of the processor is at a first voltage level in the low power state; when the processor starts to exit the low power state according to the awakening event, determining by the power management unit a wait time, during which the operation voltage of the processor is recovered to a second voltage level of a working state from the first voltage level, according to the calculated staying time, wherein the first voltage level is lower than the second voltage level, and wherein the determining operation further comprises: dividing the calculated staying time into a plurality of levels; and mapping the calculated staying time to the wait time according to one of the levels corresponding to the calculated staying time.