Emulation of content-addressable memories
US6754766B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 14, 2002 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Sep 20, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C15/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Circuitry that includes blocks of memory can be used to emulate a content addressable memory (“CAM”). The CAM data is stored in enough blocks of memory so that all of that data can be gradually read out in the time allowed for completion of a CAM search. As the data is read out, it is compared to CAM search data. If and when a match is found, a CAM address associated with the CAM data found to match the search data is generated. Alternatively or in addition, a simple “match” signal may be generated. If desired, the contents of the emulated CAM may be changed. To do this, circuitry is provided for converting the CAM address of the new data to an appropriate physical address (in the above-mentioned memory blocks) for that data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.