SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
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 the PDMA_PSILCFG_TX_STATIC_TR[31] BURST bit 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.