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US Patent 5978808 - Virtual small block file manager for flash memory array
US Patent Issued on November 2, 1999
Estimated Patent Expiration Date:
December 27, 2015Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
December 27, 2015Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA 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.Other References
| InventorsApplicationNo. 579115 filed on 12/27/1995US Classes:707/100, DATABASE SCHEMA OR DATA STRUCTURE707/200FILE OR DATABASE MAINTENANCEField of Search707/100, DATABASE SCHEMA OR DATA STRUCTURE707/200, FILE OR DATABASE MAINTENANCE707/205, File allocation711/103, Programmable read only memory (PROM, EEPROM, etc.)711/205, Directories and tables (e.g., DLAT, TLB)711/206, Translation tables (e.g., segment and page table or map)711/207, Directory tables (e.g., DLAT, TLB)711/208, Segment or page table descriptor711/209Including plural logical address spaces, pages, segments, blocksExaminersPrimary: Von Buhr, Maria N.Attorney, Agent or FirmUS Patent References5337275, Method for releasing space in flash EEPROM memory array to allow the storage of compressed dataIssued on: 08/09/1994 Inventor: Garner5357475, Method for detaching sectors in a flash EEPROM memory array Issued on: 10/18/1994 Inventor: Hasbun, et al.5404485, Flash file system Issued on: 04/04/1995 Inventor: Ban5438573, Flash EEPROM array data and header file structure Issued on: 08/01/1995 Inventor: Mangan, et al.5457658, Nonvolatile memory with cluster-erase flash capability and solid state file apparatus using the same Issued on: 10/10/1995 Inventor: Niijima, et al.5471478, Flash EEPROM array data and header file structure Issued on: 11/28/1995 Inventor: Mangan, et al.5485595, Flash memory mass storage architecture incorporating wear leveling technique without using cam cells Issued on: 01/16/1996 Inventor: Assar, et al.5544356, Block-erasable non-volatile semiconductor memory which tracks and stores the total number of write/erase cycles for each block Issued on: 08/06/1996 Inventor: Robinson, et al.5563828, Method and apparatus for searching for data in multi-bit flash EEPROM memory arrays Issued on: 10/08/1996 Inventor: Hasbun, et al.5568634, Method of writing in a non-volatile memory, notably in a memory card employing memory allocation strategies on size and occupancy basis Issued on: 10/22/1996 Inventor: Gordons5581723, Method and apparatus for retaining flash block structure data during erase operations in a flash EEPROM memory array Issued on: 12/03/1996 Inventor: Hasbun, et al.5740396Solid state disk device having a flash memory accessed by utilizing an address conversion table to convert sector address information to a physical block number Issued on: 04/14/1998 Inventor: Mason International ClassG06F 017/30 |
