| 摘要 |
PROBLEM TO BE SOLVED: To obtain a highly reliable cumulative value without substantially increasing a necessary memory space even in a case where a large-size cumulative value is a management target.SOLUTION: A non-volatile storage part and a data management part are included. On the non-volatile storage part, a data area 12a in which plural individual information memories DM(1) through DM(20) respectively holding values each representing a part of cumulative value are regularly disposed across plural addresses and a pointer area 12b that holds specific address information related to the position of an individual information memory that has been updated most recently, of the plural individual information memories in the data area, are included. On the basis of the specific address information of the pointer area, an individual information memory at a specific position and the specific address information of the pointer area are updated, and the cumulative value is grasped on the basis of the stored contents of the plural individual information memories. The individual information memory DM is constituted by combining memories of plural addresses. |
