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DMA or direct write/read to extern memory

Question asked by Tom00 on Mar 10, 2010
Latest reply on Mar 10, 2010 by DivyaS



I would like to store some data in an external delay line. It is possible to write and read data directly to the external memory or one could write the data first in an internal memory use a DMA to transfer the data to the external memory.


Do I understand correct: Writing to external memory is between 2-4 times slower than writing to internal memory, if external memory is running at full speed? So it pays off to transfer large block with DMA, but for transferring few samples may direct access is faster.