Method and apparatus for synchronizing data transfer
US6033441A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1997 |
| Grant date | Mar 7, 2000 |
| Priority date | — |
| Expiry date | Dec 23, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/405
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A transfer of data between the first clock domain to the second clock domain is synchronized in a situation in which the first clock signal in the first clock domain is generated from a source independent from the second clock signal in the second clock domain. The ratio of one frequency to another is determined along with the phase relationship between the two clock signals during a selected period of time. Then, the phase relationship is predicted for a future period of time. This prediction of the relationship between the two clock signals serves as an input to a control mechanism, which prevents sampling of data and control signals when they are transitioned from one state to another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.