Synchronizing data or signal transfer across clocked logic domains
US7161999B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 2, 2002 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | Mar 7, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0008
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A synchronization interface transfers multi-bit digital data or signal between multiple clocked logic domains while maintaining data or signal integrity. When deployed in a processor-based system, in one embodiment, a plurality of data units may be received at a source location in a first clocked domain. To control writing of the plurality of data units from the source location to a target location in a second clocked domain, an enable signal may be detected. This enable signal may be synchronized with respect to the second clocked domain. Finally, in response to the synchronized enable signal, the plurality of data units may be transferred from the first clocked domain to the target location in the second clocked domain. The synchronization interface may comprise a data path to capture the multi-bit digital data or signal based on a control logic implementing a mechanism (e.g., a state machine) to synchronously transfer the data across a first and a second asynchronously clocked domains capable of receiving a first and a second clock, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.