Title:
電子機器およびクロック補正方法
Document Type and Number:
Japanese Patent JP5556579
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an electronic apparatus and a clock correction method which are capable of retaining a frequency of a clock signal within a specified range by correcting the frequency of the clock signal without changing considerably in a system in which the clock signal is generated by a RC oscillator.SOLUTION: An electronic apparatus and a clock correction method thereof are provided. The electronic apparatus includes: frequency change means which is capable of changing a frequency of a clock signal over a plurality of stages by switching a set value of resistance or capacitance of a RC oscillator; storage means which stores a trimming table listing change amounts over the plurality of stages; and clock correction control means which corrects the frequency of the clock signal by switching the set value of the frequency change means. On the basis of data in the trimming table, the clock correction control means then switches the set value of the frequency change means in such a manner that the frequency of the clock signal becomes gradually closer to a specified frequency from a frequency prior to correction (S7, S8), thereby correcting the frequency of the clock signal.
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Inventors:
Naoto Enda
Application Number:
JP2010236028A
Publication Date:
July 23, 2014
Filing Date:
October 21, 2010
Export Citation:
Assignee:
Casio Computer Co., Ltd.
International Classes:
G06F1/04; G06F1/08; H03B5/20; H03K3/02; H03L7/00
Attorney, Agent or Firm:
Patent business corporation Mitsuaki international patent firm