ELECTRONICALLY CONTROLLED MECHANICAL TIMEPIECE, CONTROL METHOD OF AN ELECTRONICALLY CONTROLLED MECHANICAL TIMEPIECE, AND ELECTRONIC TIMEPIECE

摘要

Provided are an electronically controlled mechanical timepiece having a temperature compensator drivable by a low voltage with low current consumption, and a control method of an electronically controlled mechanical timepiece. The temperature compensator of the electronically controlled mechanical timepiece includes a frequency adjustment control circuit that controls an oscillation circuit, a theoretical regulation circuit that controls a frequency divider, a temperature detector, an arithmetic circuit, temperature compensation table storage, device-difference compensation data storage, a first switch that controls connection of the temperature compensation table storage to the power supply circuit, and a second switch that controls connection of the device-difference compensation data storage to the power supply circuit. The arithmetic circuit calculates a compensation amount based on the temperature measured by the temperature detector, the temperature compensation data, and the device-difference compensation data, and outputs to the frequency adjustment control circuit and the theoretical regulation circuit. The first switch is controlled to the connect state during a first power supply connection period including a temperature compensation data read period. The second switch is controlled to the connect state during a second power supply connection period including a device-difference compensation data read period.