Row hammer monitoring based on stored row hammer threshold value
US9032141B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Nov 30, 2012 |
| Grant date | May 12, 2015 |
| Priority date | — |
| Expiry date | Apr 3, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/408
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Detection logic of a memory subsystem obtains a threshold for a memory device that indicates a number of accesses within a time window that causes risk of data corruption on a physically adjacent row. The detection logic obtains the threshold from a register that stores configuration information for the memory device, and can be a register on the memory device itself and/or can be an entry of a configuration storage device of a memory module to which the memory device belongs. The detection logic determines whether a number of accesses to a row of the memory device exceeds the threshold. In response to detecting the number of accesses exceeds the threshold, the detection logic can generate a trigger to cause the memory device to perform a refresh targeted to a physically adjacent victim row.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.