7.4.1.5.1 Notes on the Source Address Register (SAR)

Address is word aligned at the start.
Address increments on each successful transfer at the source end.
HPDMA controller starts reading the data from source memory and transfers to destination memory.
Software can write all 32-bit source address to prevent non-word aligned transfers at the start and 2 LSBs, 1:0, are masked in the hardware.
The source address is updated when descriptor transfer is in progress.

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.