Flash memory and mapping control apparatus and method for flash memory
US7287117B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2004 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Oct 27, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0246
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A mapping algorithm for efficient access to a flash memory, wherein block state information that is changed through logical operations required by a processor is written in the flash memory according to a predetermined state transition algorithm and the changed information is referred to upon read/write operations. A mapping control apparatus for a flash memory according to the present invention includes a flash memory having regions divided on a block basis and containing block state information indicating the state of each block, each block including a predetermined number of sectors; and a processor for determining a sector on which a predetermined logical operation is to be performed based on the block state information and updating the block state information according to a predetermined state transition algorithm, when the logical operation is required for the flash memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.