System and method for controlling DMA data transfer

Details System and method for controlling DMA data transfer System and method for controlling DMA data transfer

2005-06-01

2008-08-19

Patel, Niketa I. (Department: 2181)

Electrical computers and digital data processing systems: input/

Input/output data processing

Direct memory accessing

C710S001000, C710S022000, C710S023000

Reexamination Certificate

active

07415550

ABSTRACT:
A data transfer control system that can change the way of DMA transfers to meet the requirements of each application. The data transfer control system includes a DMA controller (DMAC) and a DMAC memory dedicated for DMA control purposes. The DMAC performs DMA transfers according to a DMA program stored in the DMAC memory. Each time a new DMA request is received, the DMAC saves its parameters in a DMA request parameter table, and each DMA request parameter table is registered with a DMA request management table. In this way, the received DMA requests are queued in the DMA request management table. They are executed in a first-in first-out fashion. The progress of ongoing DMA transfers are managed in a DMA channel status table disposed for each DMA channel.

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