| 摘要 |
An IC card of the present invention, which receives a power supply or a radio wave from an upper apparatus so as to operate an internal IC chip, has, for example, an FeRAM which can be used as a program memory and a work memory. When a power supply is broken during a writing process so as not to be supplied to the inside, a ferroelectric capacitor in the FeRAM 4 is used so that a voltage for time required for completing the writing process is secured.
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