Abstract: A method of managing data in a flash EEPROM memory array allows all data to be recovered after power loss except new data in a sector in which the data content is being changed when power is lost. The method includes providing a block data structure and a plurality of sector data structures in each block of a flash EEPROM memory array, each data structure storing an indication of the operating state of the block or an associated physical sector of the array; changing the indication stored in the block data structure or the sector data structure when the operating state of the block or the associated sector changes; detecting the indication stored in the block data structure and the sector data structures when power is restored to a system which has lost power; and managing the flash EEPROM memory array depending on the indications detected.

Abstract: A file system created in a flash EEPROM memory array including a first data structure for file entries, the file entries being arranged serially for access, each file entry pointing to one of a plurality of second data structures; a plurality of second data structures for file information entries, each file information entry of the second data structure pointing to data in one file, each file information entry of the second data structure being arranged serially for access and pointing to data entered in a file; and a plurality of data entries each pointed to by a file information entry of one of the second data structures.

Abstract: A file system created in a flash EEPROM memory array for an embedded system having a plurality of blocks of flash memory cells, each block being divided into identical-sized areas capable of being addressed, the file system including a data structure positioned at a predetermined one of the areas on each block of a flash EEPROM memory array, the data structure storing a logical identification of data stored in each of the areas, the logical identifications of data being stored sequentially in the physical order of the areas on the block, a controller implemented process for searching the predetermined ones of the areas on each block to detect a logical identification of data, and means for accessing the physical area associated with any logical identification of data which is detected.