Method and apparatus to quiesce USB activities using interrupt descriptor caching and asynchronous notifications
US7281074B2 · kind B2 · utility
18Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2005 |
| Grant date | Oct 9, 2007 |
| Priority date | — |
| Expiry date | Aug 31, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a data processing system includes, but is not limited to, a processor, a memory coupled to the processor, and a universal serial bus (USB) controller coupled to the processor and the memory. The USB controller includes a local memory to cache at least one activity descriptor of at least a portion of a periodic schedule having multiple frames stored in the main memory. The USB controller defers to service an active USB device described by one of the activity descriptors until a corresponding frame is scheduled to be serviced subsequently. Other methods and apparatuses are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.