Protocol for transfer of dma data

Details Protocol for transfer of dma data Protocol for transfer of dma data

G - Physics

06

F

354/232

G06F 13/00 (2006.01) G06F 13/28 (2006.01)

Patent

CA 2022250

ABSTRACT OF THE DISCLOSURE A process for transferring data via DMA between a system resource and a controller via switching logic. During a setup write transaction, the switching logic is set up to enable DMA data to be transferred between a particular system memory and a selected system resource. The setup write transaction also is used to initialize the DMA byte counter. During a subsequent write transaction, DMA pointer registers are initialized with appropriate starting addresses. The controller then transmits a DMA start code and the system resource responds by transmitting an acknowledge code. At that time, DMA data is transmitted between the controller and the system resource via the switching logic.

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