Solid state disk device having a flash memory accessed by utilizing an address conversion table to convert sector address information to a physical block number
Patent 5740396 Issued on April 14, 1998. Estimated Expiration Date: 
February 8, 2016. Estimated 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.
February 8, 2016. Estimated 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.Patent ReferencesFlash solid state drive that emulates a disk drive and stores variable length and fixed lenth data blocks Disk drive system interface architecture employing state machines Apparatus for using flash memory as a floppy disk emulator in a computer system Patent #: 5473765 InventorApplicationNo. 598535 filed on 02/08/1996US Classes:711/103, Programmable read only memory (PROM, EEPROM, etc.)365/185.33, Flash711/100, STORAGE ACCESSING AND CONTROL711/173Memory partitioningExaminersPrimary: Asta, Frank J.Attorney, Agent or FirmForeign Patent References
International ClassG06F 013/00Foreign Application Priority Data1995-02-16 JPAbstractA semiconductor disk device comprising a flash memory having a plurality of blocks, each block constructed of a block information memory area for storing the number of erase cycles of the block, a plurality of data memory areas for storing data, and a logical sector address memory area associated with each of the data memory areas for storing a logical sector address, an address conversion table for converting the logical sector address into a physical block number, and a CPU which converts the logical sector address (LSA) into the physical block number (PBN) according to the address conversion table. The CPU also searches the latest data memory area in the physical block in the flash memory based on the logical sector address and reads the content of the latest data memory area. Thus, a small-capacity address conversion table for memory management results.Field of SearchFlash | |
