Methods for writing ternary content addressable memory devices
US11894054B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2022 |
| Grant date | Feb 6, 2024 |
| Priority date | — |
| Expiry date | May 9, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C7/222
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Ternary content-addressable memory (TCAM) devices are described. The TCAMs described herein are designed to perform write operations—including data writes and mask writes—in a single clock cycle. For example, data input is written in a row of the TCAM during the first portion of a clock cycle, and a mask is written in another row of the TCAM during the second portion of the clock cycle, for example immediately after or after a programmable delay from the data write. In one implementation, a first bus is used both for data write and key search operations, and a second bus is used both for mask write and search masking operations. In another implementation, a first bus is used both for data write and key search operations, a second bus is used for mask write operations, and a third bus is used for search masking operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.