| 摘要 |
<P>PROBLEM TO BE SOLVED: To satisfy both suppression of the increase in a memory capacity and that in a data processing time, which are conventionally considered hardly attainable at the same time, in a non-contact IC card securing data against interruption of a power source when writing in a memory. <P>SOLUTION: A memory part 300 is provided with a physical area 304 storing the record data, a buffer area 302 temporarily storing the received data from a reader/writer, and a save area 303 for the original data. In the memory part, a virtual area 314 managing the data is arranged separately from the physical area, while a record data movement control part 420 performing relay control between a CPU 200 and the memory part 300 is arranged. The record data movement control part 402 executes a writing instruction with a data length shorter than that of the record data in the virtual area 314 according to an instruction from the CPU, and in synchronization with this, writing of the record data is carried out in the physical area 304. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
