To provide a nonvolatile storage element capable of being formed by an ordinary CMOS process using single layer polysilicon without requiring exclusive forming process and a reference voltage generation circuit with high versatility and high precision. A reference voltage generation circuit includes nonvolatile storage elements formed of single layer polysilicon. The nonvolatile storage elements each include a MOS transistor including a floating gate, a MOS transistor including a floating gate, and a MOS transistor including a floating gate.

Provided are an electronic circuit and electronic timepiece that can initialize internal circuits even if chattering occurs when a battery is installed. In the electronic circuit, when the initialization state hold signal is input, the initialization control circuit continues outputting the initialization control signal at the first level until the clock signal is output; and when the initialization state hold signal is input and the clock signal is output, outputs the initialization control signal at the second level cancelling the initialization process to the initialization circuit.

Provided are an electronic circuit and electronic timepiece that can initialize internal circuits even if chattering occurs when a battery is installed. In the electronic circuit, when the initialization state hold signal is input, the initialization control circuit continues outputting the initialization control signal at the first level until the clock signal is output; and when the initialization state hold signal is input and the clock signal is output, outputs the initialization control signal at the second level cancelling the initialization process to the initialization circuit.

According to various embodiments, a watch may be provided. The watch may include: a timing circuit configured to provide information about a current time; a smart watch circuit configured to provide smart watch functionality; a first battery configured to provide energy to the timing circuit; a second battery configured to provide energy to the smart watch circuit; and a communication circuit configured to provide communication between the timing circuit and the smart watch circuit; wherein the communication circuit includes a safety circuit configured to prevent leakage of current from the first battery to the second battery.

According to various embodiments, a watch may be provided. The watch may include: a timing circuit configured to provide information about a current time; a smart watch circuit configured to provide smart watch functionality; a first battery configured to provide energy to the timing circuit; a second battery configured to provide energy to the smart watch circuit; and a communication circuit configured to provide communication between the timing circuit and the smart watch circuit; wherein the communication circuit includes a safety circuit configured to prevent leakage of current from the first battery to the second battery.

A timepiece includes a case forming an electrical mass, the case being closed by a back and a protective glass, a tactile control device connected to an electronic unit configured to execute at least one predetermined function of the timepiece, the tactile control device includes at least one capacitive sensor having a first armature formed by a transparent conductive electrode, formed at least on a portion of an internal face of the protective glass, and a second armature formed selectively by the positioning of the finger of the wearer of said timepiece on an external face of the protective glass. The transparent conductive electrode is electrically connected to the electronic unit by a first electrical conductor. The timepiece includes an anti-fog device of the protective glass formed in part by the transparent conductive electrode and by a second electrical conductor, the electronic unit includes an electric current management module.

A timepiece includes a case forming an electrical mass, the case being closed by a back and a protective glass, a tactile control device connected to an electronic unit configured to execute at least one predetermined function of the timepiece, the tactile control device includes at least one capacitive sensor having a first armature formed by a transparent conductive electrode, formed at least on a portion of an internal face of the protective glass, and a second armature formed selectively by the positioning of the finger of the wearer of said timepiece on an external face of the protective glass. The transparent conductive electrode is electrically connected to the electronic unit by a first electrical conductor. The timepiece includes an anti-fog device of the protective glass formed in part by the transparent conductive electrode and by a second electrical conductor, the electronic unit includes an electric current management module.

A semiconductor device includes: a secondary battery; a constant voltage generation circuit that is driven in accordance with the secondary battery; a control logic circuit that is driven with a constant voltage generated by the constant voltage generation circuit and controls the constant voltage generation circuit; and a starting circuit that outputs a control signal for operating the constant voltage generation circuit in correspondence to an initialization signal input from outside in a case in which the constant voltage generation circuit is stopped.

A semiconductor device includes: a secondary battery; a constant voltage generation circuit that is driven in accordance with the secondary battery; a control logic circuit that is driven with a constant voltage generated by the constant voltage generation circuit and controls the constant voltage generation circuit; and a starting circuit that outputs a control signal for operating the constant voltage generation circuit in correspondence to an initialization signal input from outside in a case in which the constant voltage generation circuit is stopped.

A smart watch includes a watch casing with a display disposed along the watch casing. One or more processors are operable with the display. An energy storage device powers the one or more processors. When an amount of stored energy in the energy storage device is above a predefined threshold, the one or more processors perform a timekeeping function and at least one additional function. When the amount of stored energy in the energy storage device falls below the predefined threshold, the one or more processors disable the at least one additional function while continuing to perform the timekeeping function.