Provided is an electronic watch which achieves a highest-speed fast-forward operation of a step motor based on various environments under which the watch is placed, and enables low-power driving. The electronic watch includes: a normal pulse generator circuit configured to output a normal pulse SP for driving a step motor; a detection pulse generator circuit configured to output, after the step motor has been driven with the normal pulse SP, detection pulses DP1 and DP2 for detecting whether or not the step motor has been rotated; a pulse selection circuit configured to selectively output the normal pulse SP and the detection pulses DP1 and DP2; a rotation detector circuit configured to input detection signals DS1 and DS2 generated from the detection pulses DP1 and DP2, and to determine whether or not the step motor has been rotated; and a frequency selection circuit configured to determine a driving interval of the normal pulse SP, in which the rotation detector circuit is configured to instruct the frequency selection circuit to select a frequency corresponding to a position at which the detection signals DS1 and DS2 have been generated.

A system, supplied by a power supply, is switched into standby mode by an electronic device that includes a charging input coupled to a charge voltage obtained from the voltage delivered by the power supply. A first input is coupled to the power supply and a power supply output is coupled to the system. A storage capacitive element is coupled to the charging input and configured to be charged by the charge voltage. A switching circuit, coupled between the first input and the power supply output, disconnects the power supply output from the first input when the voltage across the terminals of the storage capacitive element is higher than a threshold. A discharge circuit discharges the storage capacitive element so that the capacitor voltage becomes lower than the threshold. The switching circuit further re-connects the first input to the power supply output at the end of the discharge period.

The electronic watch includes a controller configured to perform switching between a time display mode which displays a time, a modification mode in which at least one of hands is moved in accordance with an operation of the operation device, and a power saving mode which consumes less power than in the time display mode by stopping at least one of the hands. The controller switches to the power saving mode when a battery voltage is detected to be less than a first voltage threshold value while the time display mode is performed, and switches to the power saving mode when the battery voltage to be less than a second voltage threshold value which is lower than the first voltage threshold value while the modification mode is performed.

The electronic watch includes a controller configured to perform switching between a time display mode which displays a time, a modification mode in which at least one of hands is moved in accordance with an operation of the operation device, and a power saving mode which consumes less power than in the time display mode by stopping at least one of the hands. The controller switches to the power saving mode when a battery voltage is detected to be less than a first voltage threshold value while the time display mode is performed, and switches to the power saving mode when the battery voltage to be less than a second voltage threshold value which is lower than the first voltage threshold value while the modification mode is performed.

Provided is an electronic clock including: a power generator; a secondary battery, which is to be charged with electric power generated by the power generator; a balance information transmitter configured to transmit, to a computer, balance information relating to a transition of a power generation amount or a charging balance of the secondary battery; a connection time period setting module configured to set a connection time period of a connection with the computer based on the balance information; and a communication controller configured to control a start and an end of communication to/from the computer based on the connection time period.

Provided is an electronic clock including: a power generator; a secondary battery, which is to be charged with electric power generated by the power generator; a balance information transmitter configured to transmit, to a computer, balance information relating to a transition of a power generation amount or a charging balance of the secondary battery; a connection time period setting module configured to set a connection time period of a connection with the computer based on the balance information; and a communication controller configured to control a start and an end of communication to/from the computer based on the connection time period.

A method of managing an electronic apparatus including a case containing a microcontroller powered with electrical energy by an electrical energy storage and connected to a time base, a mechanism of measuring light intensity, a mechanism of detecting whether the apparatus is being worn, the microcontroller also being connected to a first display and a second display, arranged, in an active operating mode, to be controlled by the electronic control circuit to display at least a first temporal data item at least provided by the time base.

A method of managing an electronic apparatus including a case containing a microcontroller powered with electrical energy by an electrical energy storage and connected to a time base, a mechanism of measuring light intensity, a mechanism of detecting whether the apparatus is being worn, the microcontroller also being connected to a first display and a second display, arranged, in an active operating mode, to be controlled by the electronic control circuit to display at least a first temporal data item at least provided by the time base.

An electronic timepiece includes a first switch connected to a signal line, a second switch, and a one-shot pulse signal generation circuit. The first switch is inserted into the signal line. One end of the second switch is connected to the signal line at a rear stage of the first switch, and the other end of the second switch is connected to a power source. The one-shot pulse signal generation circuit generates a one-shot pulse signal by using a reference clock signal, and the second switch is controlled by the one-shot pulse signal. The timepiece device can reduce currents flowing in a pull-down resistor or a pull-up resistor when a crown switch is turned on.

An electronic timepiece includes a first switch connected to a signal line, a second switch, and a one-shot pulse signal generation circuit. The first switch is inserted into the signal line. One end of the second switch is connected to the signal line at a rear stage of the first switch, and the other end of the second switch is connected to a power source. The one-shot pulse signal generation circuit generates a one-shot pulse signal by using a reference clock signal, and the second switch is controlled by the one-shot pulse signal. The timepiece device can reduce currents flowing in a pull-down resistor or a pull-up resistor when a crown switch is turned on.