DMA controller
US6792481B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Sep 28, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A DMA controller has both a receiving portion and a sending portion and may be used in a modem or other data transmission context. The DMA controller is intended to provide to or receive from data samples on a bus that may or may not be available. For the case when the bus is available, samples of data are either sent to or received from proper memory locations. When the bus is not available, the number of the samples that are missed due to the bus not being available is stored. This count is then used to ensure that the samples that are provided or received when the bus becomes available are stored in or read from the proper location to provide the samples at the proper time. The locations in which the samples were lost are provided with predetermined values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.