Apparatuses and methods for dynamic refresh allocation
US10964374B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2019 |
| Grant date | Mar 30, 2021 |
| Priority date | — |
| Expiry date | Aug 23, 2039 |
Classification
- Technology area (CPC —)General
Abstract
Embodiments of the disclosure are drawn to apparatuses, systems, and methods for dynamic refresh allocation. Memories may be subject to row hammer attacks, where one or more wordlines are repeatedly accessed to cause data degradation in victim rows nearby to the hammered wordlines. A memory may perform background auto-refresh operations, and targeted refresh operations where victim wordlines are refreshed. The memory may monitor access patterns to the memory in order to dynamically allocate the number of targeted refresh operations and auto-refresh operations in a set of refresh operations based on if a hammer attack is occurring and the type of hammer attack which is occurring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.