SPRUIV7B May 2022 – September 2023 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP
The burst mode for XY is designed to allow the PDMA to burst across a FIFO region, while extracting out the 'sample size' from each data phase. So for example, it can read a "burst" of multiple 32-bit words from a McASP, and grab only 24-bits from each data phase.
It uses the same registers as standard XY mode, where X is the encoded sample size, and Y is the number of samples to read/write per DMA request. Setting bit 31 of the XY register enables burst.
The following are the rules for enabling burst mode. Incompatible peripherals do not need to enable burst, or can enable it on RX without enabling it on TX.