UPL DMA The UPL DMA serves a critical function because it reduces the number of data movements in the system. Using a single DMA operation or DMA chain to move and process the data instead of transfers to and from additional external processor nodes, the UPL DMA utilizes a proven interface to move data between the UPL block and its associated QDR II SRAM. This allows developers to focus on the UPL implementation instead of the logic required to perform the data movements.