Semiconductor memory with automatic refresh means
US4747082A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 21, 1987 |
| Grant date | May 24, 1988 |
| Priority date | — |
| Expiry date | Jul 21, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/406
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A semiconductor memory is provided with automatic refresh means including a timer, a refresh counter and a refresh buffer each formed on a semiconductor chip mounted with an asynchronous memory, for automatically performing a periodic refresh operation on the basis of a basic clock signal which is generated in response to the detection of a logical change in the output of the refresh counter. The automatic refresh counter includes means for performing one of a read operation and a write operation which are based upon a regular address signal asynchronous with the periodic refresh operation, in preference to the periodic refresh operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.