Apparatus and method for performing DMA data transfer
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United States of America Patent
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Jul 6, 2010
Grant Date -
Aug 30, 2007
app pub date -
May 26, 2006
filing date -
Feb 28, 2006
priority date (Note) -
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Abstract
The DMA data transfer apparatus includes a memory, a communication controller, a DMA controller having a plurality of DMA engines each of which transfers data by DMA to the communication controller from the memory, and a DMA control unit. The DMA control unit determines a division size of transfer data such that the DMA engine can transfer the data, issues a data transfer directive by the DMA to the DMA controller, and controls data transfer by the DMA. The DMA control unit transmits the determination information for determination of the termination of data transfer to the communication controller. The communication controller determines the termination of data transfer based on the determination information transmitted from the DMA control unit.
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