Patent ID: 8319642

Claim:
A RFID device comprising: an analog block configured to receive a radio frequency signal so as to output an operating command signal; a digital block configured to generate and output an address and an operation adjusting signal in response to the operating command signal, output a response signal to the analog block, and generate a flag data corresponding to a data processing state and value; and a memory block configured to read and write a data in a nonvolatile ferroelectric capacitor in response to the operation adjusting signal, wherein the memory block comprises a memory unit configured to store the flag data in a ferroelectric capacitor so as to output the flag data to the digital block, wherein the memory unit stores the flag data for a given time when a power voltage supplied to the digital block drops below a critical voltage, wherein the memory unit comprises: a first data storage unit configured to store the flag data; and an output driving unit configured to drive an output signal of the first data storage unit.