Control method of nonvolatile memory
US6879528B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2002 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Sep 22, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7209
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A control method of nonvolatile memory is provided, wherein it does not happen that data which ought to have been erased are not erased, or data which ought to have been written are lost even if a forced interruption takes place due to shutdown of a power source for a memory device, a reset command, or the like occurs when data are written in a last page of a block, the block is validated by setting the block data validation flag provided in the redundant area of the last page of block 0 (valid). Furthermore, a counter judges whether the data is new or old, and data can be protected even if the above-mentioned solution cannot be implemented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.