| 摘要 |
PROBLEM TO BE SOLVED: To provide an IC card, a data read-write method and a data read-write program which are capable of coping with data corruption by delay destruction in flash memory.SOLUTION: A CPU 11 reads data from each page included in a page ring to RAM 12, detects an error of the data by using an error detection code included in the data on the RAM 12, searches and identifies the latest written page and the oldest written page among each of pages included in the page ring R by using a flag included in the data in which the error is not detected, reads the data from the identified latest page to the RAM 12, updates the data on the RAM 12, and writes the updated data to the identified oldest page. |
