I tried to learn all datasheets:
SHARC Processor Programming Reference (includes the ADSP-2136x/ADSP-2137x/ADSP-214xx processors), Rev. 2.2, March 2011
ADSP-214xx SHARC Processor Hardware Reference, Rev. 0.3, July 2010
but I found nothing how Circular Buffering DMA work especially for external Port.
It's not good for AD
How I can developed my software if I can't understood how to work ADSP21489?