18897120. Circuit Device And Real-Time Clock Device (SEIKO EPSON CORPORATION)

Circuit Device And Real-Time Clock Device

Organization Name

SEIKO EPSON CORPORATION

Inventor(s)

Yasuhiro Sudo of Chino JP

Circuit Device And Real-Time Clock Device

This abstract first appeared for US patent application 18897120 titled 'Circuit Device And Real-Time Clock Device

Original Abstract Submitted

A circuit device includes a main power supply terminal, a backup power supply terminal, a voltage detection circuit, a register section, a processing circuit, and a power supply control circuit. A main power supply voltage is supplied through the main power supply terminal. A backup power supply voltage from a backup element is supplied through the backup power supply terminal. The voltage detection circuit detects the backup power supply voltage and outputs backup voltage data corresponding to the backup power supply voltage. Threshold voltage data is stored in the register section. The processing circuit compares the backup voltage data with the threshold voltage data. The power supply control circuit performs charging control on the backup element for charging with the main power supply voltage on the basis of the result of a comparison made by the processing circuit.