Patent ID: 8686774

Claim:
A data hold device, comprising: a loop structure portion, holding data by using a plurality of logic gates connected in a loop form; a non-volatile storage portion, storing data held in the loop structure portion in a non-volatile manner by using hysteresis characteristics of a ferroelectric element; and a circuit separating portion, electrically separating the loop structure portion and the non-volatile storage portion; wherein the data hold device comprises a control circuit comprising: an internal clock generating portion and a control portion, wherein the internal clock generating portion starts generating an internal clock signal required by the control portion to perform action when a specific signal pattern appears in a trigger signal, continually generates the internal clock signal until the control portion completes predetermined processing, and then stops generating the internal clock signal; wherein the control portion uses the internal clock signal to perform the predetermined processing, and the control circuit serves as a mechanism for generating the control signals for the loop structure portion, the non-volatile storage portion and the circuit separating portion.