Non-contact type ic card

Details Non-contact type ic card Non-contact type ic card

G - Physics

06

K

G06K 19/07 (2006.01) G06K 19/073 (2006.01) G07F 7/10 (2006.01)

Patent

CA 2087611

In a non-contact type IC card, a re-access inhibition time setting circuit sets a re-access inhibition period of time for inhibiting the re-access for a fixed period of time after an operation of a main circuit 16 is finished. Thisprevents a double write operation of history in the card due to re-access withina short period of time. Moreover, two areas are disposed in a memory, and data are alternately written in these areas. In a read operation, if data from one ofthe areas is corrupted, the normal data in the other area is read; whereas, wheneach data is normal, the data last recorded is read. Consequently, a disabled state of a read operation due to corrupted data can be prevented.

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