Memory card having controller providing adjustable refresh to a plurality of DRAMs
US5345574A · kind A · utility
29Cited by
21References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 1991 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | May 15, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/406
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A dynamic access random access card is provided with a dynamic random access memory and a source for generating a plurality of reference clock pulses. A control circuit generates refresh operations of the dynamic access memory in response to the plurality of reference clock pulses generated by the source, the initiation of the refresh operations being independent of any external refresh request. The refresh operations are interrupted and the dynamic random access memory is set to a standby condition upon detection of a predetermined external signal, thereby permitting read/write operations of the dynamic random access memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.