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Method for switching CPU working voltage using N division calculation method

A technology of working voltage and algorithm, applied in the direction of program control device, etc., can solve problems such as system instability, and achieve the effect of simple method

Inactive Publication Date: 2008-10-22
VIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention is to provide a method for switching the working voltage of the CPU by using the N-point calculation algorithm to solve the technical problem that the CPU with the multi-stage switching working voltage causes system instability when switching the voltage

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  • Method for switching CPU working voltage using N division calculation method
  • Method for switching CPU working voltage using N division calculation method
  • Method for switching CPU working voltage using N division calculation method

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Embodiment Construction

[0028] The present invention completes the switching of the CPU operating voltage based on the N-point algorithm without causing the voltage regulator to determine that the operating voltage difference is too large, which results in a system restart. In the CPU power management function, the high and low working voltage of the CPU is switched, and the difference between the high and low working voltages to be switched is often too large due to actual needs. At this time, there is no need to use known technology to solve the problem in pure hardware. You can try to use software to complete N times. ; Its spirit is to achieve the difference value of the switching operating voltage, but the N-point algorithm is not completed at one time, but divided into N times, and the new operating voltage that the CPU wants to switch is achieved by switching the operating voltage N times. Therefore, the CPU operating voltage can be switched in the CPU power management function, and the voltage re...

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Abstract

A method to switch CPU operation voltage by utilizing N subcalculation means includes two compare CPU present operation voltage with the new operation voltage to be switched on for obtaining a differential value of switching high-low operation votlage. The differential value of the said operation voltage is divided for N times according to the relationship between the operation voltage changing differential value tolerated by CPU and the differential value of high-low operation voltage. The CPU present operation voltage switches successively in order to regulate the present operation voltage of CPU as the new operation voltage of CPU with N times switching by using the operation voltage chnaging differential value tolerated by CPU as the unit. The method uses the software to solve the unstable signal problem with out needed additino of hardware cost.

Description

Technical field [0001] The invention relates to a method for multi-stage switching of CPU operating voltage, in particular to a method for switching the CPU operating voltage with stability of the system when switching voltages by using an N-segment algorithm. Background technique [0002] At present, the computer systems of the CPU series that can switch the working voltage in multiple stages are used in the market. In order to achieve the two goals of normal operation and power saving, the computer system will switch the CPU working voltage and switch the CPU working frequency according to actual needs. The technology is called CPU power management. When the CPU is executing a large number of programs and is fully loaded, it switches to a higher CPU operating voltage and higher CPU operating frequency; when the CPU is not executing any programs and is idle, it switches to a lower CPU operating voltage and lower CPU operating frequency . [0003] In terms of switching CPU operat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F9/44
Inventor 施东和
Owner VIA TECH INC
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