Method and device for switching working state and sleep state of central processing unit

Abstract

The invention provides a method and a device for switching a working state and a sleep state of a central processing unit. When that an operating signal is not present in the preset time is detected, configuration and recovery mode functions of the central processing unit and registers in each module in each mode, which is interacted with the central processing unit, are saved in a synchronous dynamic random access memory, the access addresses of the recovery mode functions are transmitted to a power management submodule of the central processing unit, the synchronous dynamic random access memory enters a self-refresh mode, and clocks and power supply of other submodules in the central processing unit except the power management submodule, and each module interacted with the central processing unit are switched off; and when an operating signal is received, the clocks and power supply of the central processing unit and each module interacted with the central processing unit are switched on, the synchronous dynamic random access memory exits the self-refresh mode, the recovery mode functions are acquired according to the access address of the recovery mode functions, and the recovery mode functions are executed so as to enter a working state before the sleep state.

Description

technical field [0001] The present invention relates to the technical field of energy saving of network communication terminals, in particular to a method and device for switching between the working state and the sleep state of a central processing unit. Background technique [0002] With the continuous development of digital technology, the use of network communication terminals is becoming more and more frequent. At the same time, the energy saving of network communication terminals has also become one of the issues that people pay more and more attention to. For example, in practical applications, the standby time and usage time of mobile phones have become one of the important references for people to buy mobile phones. Therefore, low power consumption and high performance have become the goals of various network communication terminal solution design companies. However, under a certain cost control, the battery power is limited. An important way to use your time. ...

AI Technical Summary

Problems solved by technology

Obviously, this method can save the power consumption of the network communication terminal, but its shortcomings are: the network communication terminal cannot directly enter the state before sleep, and must be restarted to resume operation, resulting in a long response time of the network communication terminal , causing a lot of inconvenience to users

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