Method for managing bad memory blocks in a nonvolatile-memory device, and nonvolatile-memory device implementing the management method
US7603593B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Feb 19, 2008 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | May 11, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C29/76
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for managing bad memory blocks of a nonvolatile-memory device, in which the available memory blocks are divided into a first set, formed by addressable memory blocks that are to be used by a user, and a second set, formed by spare memory blocks that are to replace bad addressable memory blocks, and in which the bad addressable memory blocks are re-mapped into corresponding spare memory blocks. The re-mapping of the bad addressable memory blocks envisages: seeking bad spare memory blocks; storing the logic address of each bad spare memory block in a re-directing vector in a position corresponding to that of the bad spare memory block in the respective set; seeking bad addressable memory blocks; and storing the logic address of each bad addressable memory block in a free position in the re-directing vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.