Clock generation circuit self-calibration system and its correction method

Abstract

Provided are a self-correcting system and method for a clock-generating circuit. The system comprises a hardware logic module, a register module connected to the hardware logic module, a clock-generating circuit module connected to the hardware logic module and the register module, and a storage module connected bi-directionally to the register module. The hardware logic module generates search data and transmits same as the configuration parameter for the clock-generating circuit module to the register module; the register module outputs register data to the clock-generating circuit module and generates a system clock signal and transmits same to the hardware logic module; the system clock signal is compared to an external reference clock signal; as long as the precision requirement is not met, the search data is corrected and new search data is generated for a new round of correction; when the precision requirement is met, the hardware logic module stops the correction and the current search data is stored to the storage module. The present invention can automatically lower the error of the clock-generating circuit in an electronic system to be within a required error range.

Description

【Technical field】 [0001] The invention relates to the field of integrated circuits, in particular to a clock generation circuit self-calibration system and a correction method thereof which can automatically reduce the error of the clock generation circuit in an electronic system to a required error range. 【Background technique】 [0002] Clock signals used in the field of integrated circuits usually require very high precision to ensure normal communication. The existing clock generation circuit correction technology, such as the Chinese patent with the patent number CN200410086408.1, mainly uses a counting algorithm to achieve correction, and generally requires a control unit such as a CPU or MCU to complete the correction operation. [0003] The defects of existing clock generation circuit correction technology mainly include: first, the lack of verification mechanism, which makes it impossible to verify whether the corrected clock accuracy meets the system requirements; s...

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Problems solved by technology

[0003] The defects of existing clock generation circuit correction technology mainly include: first, the lack of verification mechanism, which makes it impossible to verify whether the corrected clock accuracy meets the system requirements; second, the lack of data control and storage, which may cause the correction data to be easily lost. Poor reliability; third, as long as there is no intervention of CPU or MCU, the calibration cannot be completed, that is, the system does not have self-calibration capability

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