SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
At the completion of each set of operations which fulfill a Transfer Request record, the UDMA will return a Transfer Response record to either the original Transfer Request Descriptor or the Tx Completion Queue, depending on the mechanism which was used to provide the Transfer Request record. If the Transfer Request record originated in a Transfer Request Descriptor then a corresponding slot in the Transfer Request Descriptor will be overwritten with the response status. If the Transfer Request record originated in a pass by value Tx Ring, the Transfer Response record will be placed in a pass by value Tx Completion Ring. The Transfer Response record will only contain a completion code which indicates if the transfer was a success or if a particular type of failure occurred. The exact mechanisms which are used and the contents of the Transfer Response Record are given in the TI DMA Architecture specification.