SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
To pack data means to group data to match the bus size, thus optimizing a transfer. When the logical channel ES is less than the DMA module read/write port size, and the addressing profile supports it (post-increment mode or single- or double-index mode with EI = 1), the number of elements to transfer in each read/write port access can be maximized by specifying that the source or destination is packed through the channel DMA4_CSDPi register. Thus:
Depending on the start address and transfer length, the first or last packed access can be only partially filled. This is indicated to the source or destination using the byte-enable signals.