Timepiece and control method of a timepiece
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United States of America Patent
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Jun 6, 2023
Grant Date -
Sep 17, 2020
app pub date -
Mar 12, 2020
filing date -
Mar 13, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A timepiece reduces power consumption while maintaining required precision. The timepiece has a frequency divider that frequency divides an oscillation signal and outputs a reference signal; nonvolatile memory that stores information related to a temperature characteristic of the oscillation frequency of the crystal oscillator; multiple registers; a temperature measuring circuit; an evaluation circuit; and a temperature compensation circuit. The temperature compensation circuit reads the information from one of the registers and corrects the reference signal based on the read information and the temperature measurement information when the evaluation circuit determines the information stored in the multiple registers is the same; and when the evaluation circuit determines the information stored in the multiple registers is different, reads the information from the nonvolatile memory, stores the read information in the multiple registers, and corrects the reference signal based on the read information and the temperature measurement information.
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