| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a one-time ROM access method by which the frequent access to a RYE is canceled when searching a data write position and the latest write data position and data write and latest write data acquisition can be efficiently obtained by searching an unwritten area position through a little access. SOLUTION: A memory managing area 1 is provided on a one-time ROM, and the respective bits of the memory managing area 1 are made correspondent to the respective access units of a data storage area. Then, the write condition of data is managed by the value of the bit and in the case of data write or latest write data acquisition, the condition of data write for the unit of access is judged from the values of respective bits by accessing the memory managing area 1. Then, the data storage area is accessed.</p> |
