Method and system for adaptive coding in flash memories
US8675417B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2009 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | Dec 5, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2211/5641
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Bits are stored by attempting to set parameter value(s) of (a) cell(s) to represent some of the bits. In accordance with the attempt, an adaptive mapping of the bits to value ranges is provided and the value(s) is/are adjusted accordingly as needed. Or, to store (a) bit(s) in (a) cell(s), a default mapping of the bit(s) to a predetermined set of value ranges is provided and an attempt is made to set the cell value(s) accordingly. If, for one of the cells, the attempt sets the value such that the desired range is inaccessible, an adaptive mapping is provided such that the desired range is accessible. Or, to store (a) bit(s) in (a) cell(s), several mappings of the bit(s) to a predetermined set of ranges is provided. Responsive to an attempt to set the cell value(s) according to one of the mappings, the mapping to actually use is selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.