Method and device for calibrating slow timing clock and terminal

Abstract

Embodiment of the invention discloses a method and a device for calibrating a slow timing clock and a terminal and relates to the technical field of telecommunication. The method and the device are invented for solving the problem that the mobile phone terminal cannot enter a sleep state in time and therefore shortens the sleep time of the mobile phone terminal and increases the power consumption thereof in the prior art. The method for calibrating the slow timing clock comprises the following steps of: obtaining a high speed clock signal and a slow clock signal, wherein the high speed clock signal is more than 13MHz; and calibrating the timing of the slow timing clock according to the high speed clock signal. In the embodiment of the invention, the power consumption of the mobile phone terminal can be greatly reduced and the clock precision can be improved.

Description

technical field [0001] The invention relates to the technical field of electrical communication, in particular to a slow timing clock calibration technology. Background technique [0002] At present, two clock sources are generally required for timing clock calibration of a mobile terminal, one is a fast clock source and the other is a slow clock source. Among them, the oscillation frequency of the fast clock source is usually 13MHz, and its precision and stability are high; the oscillation frequency of the slow clock source is usually about 32KHz, and its precision and stability are relatively low. Since the fast clock source consumes a lot of power, when the mobile terminal is sleeping, the slow clock source is usually used to provide timing for the system. However, in order to ensure that the timing deviation of the slow clock source when the mobile terminal is sleeping is not greater than the system requirement, the fast clock source is usually used as the slow clock so...

AI Technical Summary

Problems solved by technology

[0005] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: in the prior art, in order to ensure the clock accuracy requirements of different systems for mobile phone terminals, the time for the fast clock source to calibrate the slow clock source Long, so that the mobile terminal cannot enter the sleep state in time, thereby shortening the sleep time of the mobile terminal and increasing the power consumption of the mobile terminal

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