Dynamic dual control on-die termination
US7595657B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 4, 2008 |
| Grant date | Sep 29, 2009 |
| Priority date | — |
| Expiry date | Apr 4, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/0005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Controlling on-die termination on a bi-directional single-ended data bus carrying data between a controller and a memory device. The controller and the memory device respectively include input termination pull-ups and input termination pull-downs. An enabled state is maintained for the input termination pull-downs of the controller except when data is driven on the bi-directional single ended data bus by the controller. Similarly, an enabled state is maintained for the set of input termination pull-downs of the memory device except when data is driven on the bi-directional single ended data bus by the memory device. In conjunction with this, a disabled state is maintained for the input termination pull-ups of the memory device (or controller) except when data is being received from the bi-directional single-ended data bus by the memory device (or controller).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.