| 20090172267 | REFRESH METHOD OF A FLASH MEMORY - A flash memory device includes a flash memory that stores many physical data blocks, a refresh management table that stores indications of the number of times each individual physical data block has been read, and a controller responsive to read and erase control signals from a source external to the flash memory device, and to the stored indications of the refresh management table for controlling reading, erasing and refreshing of the individual physical data blocks. In response to the number of times each individual physical data block has been read being equal to or exceeding a limit value, the controller refreshes the individual physical data block associated with the indication equaling or exceeding the limit value. | 07-02-2009 |
