| 摘要 |
PCT No. PCT/JP92/00653 Sec. 371 Date Jan. 14, 1993 Sec. 102(e) Date Jan. 14, 1993 PCT Filed May 21, 1992 PCT Pub. No. WO92/21104 PCT Pub. Date Nov. 26, 1992.In a non-contact type IC card, a re-access inhibition time setting circuit 12 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. This prevents a double write operation of history in the card due to the re-access in a short period of time. Moreover, two areas 321 and 322 are disposed in a memory 32 to write data alternately in these areas. In a read operation, when data of one of the areas is destroyed, the normal data in the other area is read; whereas, when each data is normal, the data last recorded is read. Consequently, the disabled state of the read operation due to wrong data can be prevented.
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