| 摘要 |
PROBLEM TO BE SOLVED: To guarantee the contents of data in an EEPROM under writing even when the operation of a non-volatile semiconductor storage device (non- contact IC card) is interrupted during the execution of write. SOLUTION: A backup area 1-B is provided in a data area 1-A of an EEPROM part 4, un-written data, address information and parity information in the data area 1-A of the EEPROM part 4 are written into the backup area 1-B, and a backup operation control circuit 15 is provided for repairing data in the data area 1-A by referring to data in the data area 1-A and the backup area 1-B when the execution of reloading of data into the data area 1-A is interrupted. Thus, even when the execution of reloading of data is interrupted, data in the data area 1-A can be repaired. |
