Data transfer apparatus and method

Details Data transfer apparatus and method Data transfer apparatus and method

2005-10-11

2005-10-11

Gaffin, Jeffrey (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Direct memory accessing

C710S023000, C710S024000

Reexamination Certificate

active

06954806

ABSTRACT:
A data transfer apparatus and method that can make efficient use of a memory and a common bus by controlling a DMA controller through descriptor control, and can thereby achieve a data transfer with increased communication processing speed. The data transfer apparatus, which executes a DMA transfer by controlling the DMA controller through the use of a descriptor, includes: a first storage mechanism for storing descriptor common information that can be shared among a plurality of descriptors; a second storage mechanism for storing descriptor individual information that differs for each individual descriptor; and a conversion circuit for taking as inputs the descriptor common information read out of the first storage mechanism and the descriptor individual information read out of the second storage mechanism, and for outputting descriptor information to be supplied to the DMA controller.

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