Method and apparatus for determining memory types of a multi-type memory subsystem where memory of the different types are accessed using column control signals with different timing characteristics
US6505282B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1997 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Mar 19, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/1694
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a memory subsystem having a plurality of memory banks populated with up to a corresponding plurality of dynamic random access memory (DRAM) modules, the DRAM modules being of an extended data out type DRAM module or a page mode type DRAM module, ascertaining the type of DRAM module installed in populated ones of the plurality of memory banks. The DRAM type is determined by storing a predetermined value to a predetermined location in populated ones of the plurality of memory banks, and subsequently reading data from the predetermined location of populated ones of the plurality of memory banks using a page read control signal suitable for the extended data out type DRAM modules. If the data read corresponds to the predetermined value stored, an extended data out type DRAM module is identified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.