Method of storing an indication of whether a memory location in phase change memory needs programming
US7940553B2 · kind B2 · utility
9Cited by
3References
21Claims
0Family size
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Key dates
| Filing date | Dec 30, 2008 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Jul 4, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2013/0076
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A phase change memory includes a float buffer which stores the result of a comparison between the current state of data in the phase change memory cells and an intended next state of each of those cells. The float buffer indicates which cells need to be programmed in order to achieve the new states and which cells happen to already be in the new states. Then, after programming of the cells, the float buffer indicates which cells still need to be programmed. Thus, a control stage uses the information in the float buffer to program only those cells whose states need to be changed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.