I read about scatter DMA in ADSP-214xx SHARC® Processor Hardware Reference (Revision 0.3, July 27, 2010).
Some questions remain
1. What is register pointed by data from internal memory?
As I understood data for external write would take from IIEP, but figure 3-24 is shown that the source index is EIEP and the destination index is IIEP.
2. The size of the source destination = TCEPx * ICEPx