Dual-port SRAM memory using single-port memory cell
US7533222B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 2006 |
| Grant date | May 12, 2009 |
| Priority date | — |
| Expiry date | Oct 23, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/40603
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A dual-port memory system is implemented using single-port memory cells. An access arbiter having a synchronization circuit is used to prioritize and synchronize the access requests associated with the two ports. The access arbiter can also prioritize and synchronize refresh requests, in the case where the single-port memory cells require refresh. Access requests on the two ports and the refresh requests can be asynchronous. The access arbiter synchronizes the various requests by latching the requests into first-stage registers when a row access signal (RAS) is activated, and subsequently latching the contents of the first-stage registers into second-stage registers after a selected delay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.