Method for copying data in reprogrammable non-volatile memory
US7849381B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2004 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Jun 26, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7203
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods are presented for improving data relocation operations. Rather than check data quality based on its associated error correction code (ECC) in every relocation operation, it can determine whether to check ECC based on predetermined selection criteria: if ECC checking is not selected, the memory can perform an on-chip copy of the data from a first location to a second location. If ECC checking is selected, the data is transferred to the controller and checked; when an error is found, a correction operation is performed and when no error is found, an on-chip copy is performed. Predetermined selection criteria may comprise a sampling mechanism, which may be random based or deterministic. Additionally, data transfer flags can be introduced to indicate data has been corrected and should be transferred back to the memory. Header and user data can be considered separately if each has a distinct associated ECC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.