Embedded mapping information for memory devices
US8732388B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 11, 2008 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Jul 7, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C29/76
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Memory modules and methods of operating memory modules embed mapping information within blocks of memory cells to which the mapping information pertains. In particular, when a page is written for a logical data block, that page includes a snapshot of the current mapping information for that logical data block. In this manner, the last valid physical page of a logical data block will contain a physical/logical mapping of that block. Thus, instead of scanning every valid page of the memory device to rebuild the mapping information, the memory module may scan only for the last valid physical page of each logical data block. Once the last valid physical page is discovered for a logical data block, the latest mapping information for that logical data block may be read from that page.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.