A sweep motion second function is added to an analog electronic timepiece. Angular velocity control of a stepping motor for a seconds hand in which a rotor is provided is executed. A stepping motor model calculates an equation of motion and a circuit equation regarding the stepping motor in real time. Sweep drive is executed with a sweep drive pulse width generated through performing a proportional integral of the difference between angular velocity set to (radians/second) and angular velocity of the stepping motor model. Correction of the load torque is executed using the rotor angle at the zero crossing of a back electromotive voltage generated across a coil of the stepping motor and the calculated angular velocity. A DC current is applied to coils disposed at bridges of a yoke and the detent torque of the stepping motor is reduced. Time lag is corrected using a GPS time signal.

A sweep motion second function is added to an analog electronic timepiece. Angular velocity control of a stepping motor for a seconds hand in which a rotor is provided is executed. A stepping motor model calculates an equation of motion and a circuit equation regarding the stepping motor in real time. Sweep drive is executed with a sweep drive pulse width generated through performing a proportional integral of the difference between angular velocity set to (radians/second) and angular velocity of the stepping motor model. Correction of the load torque is executed using the rotor angle at the zero crossing of a back electromotive voltage generated across a coil of the stepping motor and the calculated angular velocity. A DC current is applied to coils disposed at bridges of a yoke and the detent torque of the stepping motor is reduced. Time lag is corrected using a GPS time signal.

A timer unit to counts a current date and time, a current position acquisition unit to acquire a current position, a determination unit to determine a time zone in which the acquired current position is included, and a local time acquisition unit to calculate local time corresponding to a time difference of the time zone determined by the determination unit are included. When a boundary line of the time zone is along a coastline, the determination unit changes the boundary line from the coastline to a side of a sea in a predetermined distance range and determines a time zone.

A timer unit to counts a current date and time, a current position acquisition unit to acquire a current position, a determination unit to determine a time zone in which the acquired current position is included, and a local time acquisition unit to calculate local time corresponding to a time difference of the time zone determined by the determination unit are included. When a boundary line of the time zone is along a coastline, the determination unit changes the boundary line from the coastline to a side of a sea in a predetermined distance range and determines a time zone.

A timer unit to counts a current date and time, a current position acquisition unit to acquire a current position, a determination unit to determine a time zone in which the acquired current position is included, and a local time acquisition unit to calculate local time corresponding to a time difference of the time zone determined by the determination unit are included. When a boundary line of the time zone is along a coastline, the determination unit changes the boundary line from the coastline to a side of a sea in a predetermined distance range and determines a time zone.

The fixed-time reception control section carries out the reception process at first time to acquire first reception time data and compares the acquired first reception time data with the internal time. When a difference in time between the first reception time data and the internal time is greater than or equal to a first threshold, the fixed-time reception control section carries out the reception process at second time different from the first time to acquire second reception time data. The time correction section compares the acquired second reception time data with the internal time and corrects the internal time based on the second reception time data when a difference in time between the second reception time data and the internal time is smaller than a second threshold.

The fixed-time reception control section carries out the reception process at first time to acquire first reception time data and compares the acquired first reception time data with the internal time. When a difference in time between the first reception time data and the internal time is greater than or equal to a first threshold, the fixed-time reception control section carries out the reception process at second time different from the first time to acquire second reception time data. The time correction section compares the acquired second reception time data with the internal time and corrects the internal time based on the second reception time data when a difference in time between the second reception time data and the internal time is smaller than a second threshold.

Whether a bright state or a dark state is established is determined each time a motor is driven one step, based on a presence or absence of a passing of light through a detection hole disposed in a detection wheel that rotates associated with rotations of a hand wheel coupled with the motor. A switching position X is identified at which the dark state is switched to the bright state when the dark state is determined and thereafter the bright state is determined. A position one step after the identified switching position X is set to be a reference position X+1 of the hand wheel. The reference positions X+1 and X1 can thereby be set after a driving mechanism is assembled.