SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
After reset, all channels that are configured in Third Party mode will be Idle and waiting for work to be assigned to them. In order to initiate Third Party channel operation, the Host places work in the form of either a Transfer Request Descriptor or an individual Transfer Request record onto the Rx TR Queue of the channel. The exact mechanisms which are used and the contents of both the Transfer Request Descriptor and the Transfer Request record are given in the TI DMA Architecture specification.