SEMICONDUCTOR STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor storage device that dispenses with data saving and restoration between a volatile storage device and a nonvolatile storage device in a configuration adapted to stop and resume supplying a supply voltage.

SOLUTION: As for the nonvolatile semiconductor storage device, the volatile storage device and the nonvolatile storage device are provided inseparately. Specifically, the semiconductor storage device is configured to hold data in a data holding section connected to a transistor having an oxide semiconductor in a semiconductor layer and to a capacitive element. A potential held in the data holding section is controlled by a data potential holding circuit capable of outputting the data without leaking a charge and by a data potential control circuit capable of controlling the potential held in the data holding section without leaking a charge by means of a capacitive coupling via the capacitive element.

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