| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for managing a memory that efficiently prevents a read disturb error and performs bad block processing. <P>SOLUTION: A refresh management table is provided in a flash memory device, and the number of times of data read and the number of times of data erasure are stored and updated at any time for each physical block. A flag "Low" is set for the physical block when the number of times of data read has reached a predetermined value. A flag "High" is set for a physical block where an ECC error is found when reading data. Then the refresh management table is searched properly, and refresh is executed for the block of the flag "Low" and the bad block processing is performed for the block of the flag "High". <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
