Direct memory access (DMA) receiver
US6581112B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2000 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Mar 31, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A direct memory access (DMA) receiver adapted to receive data from a source, such data to be written into a random access memory is provided. The random access memory and DMA receiver being coupled are to a central processing unit by a bus. The central processing unit is coupled to a local cache memory. The source of such data provides an address for the data, such address being the location the random access memory where the data is to be stored. The DMA receiver includes an address register, a first data register and a duplicate data register. The duplicate register has an input coupled to an output of the first data register. A selector is provided having a pair of inputs, one being coupled to the output of the first data register and another one of the pair of inputs being coupled to an output of the duplicate data register. The selector couples one of the pair of inputs to an output thereof selectively in accordance with a select signal. A state machine is included in the DMA receiver. The state machine is responsive to a receive write enable signal from the source. In response to such signal, the state machine loads the address into the address register and loads the data int…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.