Youtor
Introduction to Direct Memory Access DMA
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=M16l_ymlfcs
We've learned how interrupts relieve the CPU of the burden of polling, but what about the data transfer? A DMA will handle that for us. This lesson shows how. • Takeaways: At the completion of this lesson, each student should be able to: • • explain the benefits of direct memory access (DMA), • • describe the process of cycle stealing, • • explain how a cache supports the use of DMA, • • list the four things the DMA needs to complete a transfer, and • • show how different DMA configurations affect the number of memory cycles stolen per data element transfer. • #dma #io #bus
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