Voltage identification code processor, voltage generating circuit and generating method

Abstract

A voltage identification code processor comprises a plurality of cache units, a plurality of comparers, a plurality of multiplexers and a core processing unit. The cache units can respectively store a plurality of parameter values and a plurality of deviant values, wherein, the cache units stored with parameter values can be respectively coupled to corresponding comparers, and other cache units can be respectively coupled to corresponding multiplexers. The comparers can compare voltage identification code with the parameter values in the coupled cache units, and output selection signals to corresponding multiplexers according to the comparison result. The corresponding multiplexers thus can select one deviant value from the coupled cache units to the core processing unit, so that the coreprocessing unit can adjust the voltage identification code according to the output of the multiplexers.

Description

technical field [0001] The present invention relates to an operating voltage generating circuit, and in particular to an operating voltage generating circuit of a central processing unit. Background technique [0002] In a computer system, the operating voltage required by a central processing unit (CPU) is determined by a dynamic voltage identification code (VID) generated according to its working mode. [0003] figure 1 Shown is a known system block diagram for supplying the operating voltage of the central processing unit. Please refer to figure 1 , in the computer device, the central processing unit (CPU) 102 can generate a voltage identification code VID according to the current working state of the computer device. The voltage identification code VID is sent to the pulse width modulation (PWM) signal generator 104 so that the PWM signal generator can determine the magnitude of the operating voltage Vcore according to the value of the voltage identification code VID....

AI Technical Summary

Problems solved by technology

However, in the known system, since the change speed of the voltage identification code VID is very slow, the performance of the overall system is reduced

[0005] In addition, since the operating voltage of the central processing unit 102 is limited, the operating voltage Vcore cannot be increased without limit.

When the operating voltage Vcore reaches a critical value, if the level of the operating voltage Vcore continues to increase, the central processing unit 102 may be damaged.

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