Row hammer refresh command
US9747971B2 · kind B2 · utility
82Cited by
4References
46Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2015 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | Nov 30, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/7211
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A memory controller issues a targeted refresh command. A specific row of a memory device can be the target of repeated accesses. When the row is accessed repeatedly within a time threshold (also referred to as “hammered” or a “row hammer event”), physically adjacent row (a “victim” row) may experience data corruption. The memory controller receives an indication of a row hammer event, identifies the row associated with the row hammer event, and sends one or more commands to the memory device to cause the memory device to perform a targeted refresh that will refresh the victim row.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.