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Method for performing real time clock calibration, and associated apparatus

A technology of real-time clock and calibration method, which is applied in the direction of synchronization device, communication between multiple stations, electrical components, etc., to achieve the effect of restoring time accuracy

Inactive Publication Date: 2013-09-11
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More specifically, in some cases, the end user may need to replace or recharge the battery of a portable electronic device (such as a lithium battery / lithium polymer battery), and at this time the failure of the RTC's supplementary power supply may cause the RTC's oscillator ( oscillator) to stop oscillation during battery replacement or power deficiency

Method used

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  • Method for performing real time clock calibration, and associated apparatus
  • Method for performing real time clock calibration, and associated apparatus
  • Method for performing real time clock calibration, and associated apparatus

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Embodiment Construction

[0012] Certain terms are used throughout the specification and following claims to refer to particular components. Those skilled in the art should understand that electronic device manufacturers may use different terms to refer to the same component. This specification and subsequent claims do not use the difference in name as the way to distinguish components, but the difference in function of the components as the criterion for distinguishing. The "comprising" mentioned in the entire specification and the subsequent claims is an open term, so it should be interpreted as "including but not limited to". Otherwise, the term "coupled" includes any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0013] ...

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Abstract

A method and apparatus for performing real time clock (RTC) calibration through frame number calculation are provided, where the method is applied to an electronic device. The method includes the steps of: before power failure of the electronic device occurs, obtaining an original time value from an RTC of the electronic device and storing the original time value and a frame number of a first frame into a storage unit; and after the electronic device is powered on since elimination of the power failure, obtaining a frame number of a second frame and performing at least one calculation operation according to the frame number of the second frame, the frame number of the first frame, and the original time value to determine a calibrated time value of the RTC, and updating the RTC with at least one of the calibrated time value and a derivative of the calibrated time value. The method for performing real time clock calibration can simply reset the real time clock of the electronic device so as to restore time precision.

Description

technical field [0001] The present invention relates to a real-time clock calibration method, more specifically, to a real-time clock calibration method and device. Background technique [0002] According to the prior art, a portable electronic device equipped with a touch screen is very beneficial to end users, wherein the portable electronic device can be, for example, a multifunctional mobile phone, a personal digital assistant (personal digital assistant, PDA), a tablet computer (tablet )Wait. When both the battery of the portable electronic device and the supplementary power source of the internal real time clock (RTC) of the portable electronic device malfunction, some problems will arise. Among them, the battery of the portable electronic device can be lithium (Li-ion) battery or lithium polymer (Li-polymer) battery, and the supplementary power supply of RTC can be button-shaped (button-shaped) or coin-shaped (coin- shaped) battery. More specifically, in some cases...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26G06F1/14
CPCG06F1/14H04W56/0015
Inventor 王栋谊王志中郭俊明
Owner MEDIATEK INC