Hi,
I am confused about "Standard DMA Parameter Registers" on page 3-4 of 214xx HRM. Can someone give me a detailed explanation of:
1. HRM says index registes are 18 bit wide and have a fixed "1" at bit 19. This result in 19 bits. BUT as bits usualy starts with bit 0
a 18 bit wide register have bit 0 to bit 17. What ist about bit 18 ?. The ADSP21489 needs 20 bits (bit 0 to bit 19) to address the
complete normal word space.
2. I am not sure about the offset (bit 19) concering SPORT DMA index registers:
In case of a SPORT DMA, is the offset newer applicable (neither internal nor external memory) , or is it only related to internal memory ?
3. I have a running application with SPORT DMA buffer in normal word space. This works fine. As theSPORT receives only
16 Bit Samples, I changed the buffer to short memory space. This didn't work, the buffer receives nothing. Should the
SPORT DMA be able to transfer 16 bit samples to short memory space ?
Best regrads
Peter Pfeiffer
