Classic DMA core speed?

Hi Jan:

The DMA core basically just allows you to initiate a transaction of a specific size to a specific location with minimal CPU overhead. The latency required for the transaction is dependent upon many factors, include arbitration cycles, ram paging etc. A 2 to 1 ratio sounds very reasonable.

This is much faster than A CPU would be able to copy the bytes to the memory via instructions. If you truly need a 1 to 1 for a limited number of cycles, put it into a fifo or TCM (Tightly Coupled Memory).

Pete