SPRUJ28E November 2021 – September 2024 AM68 , AM68A , TDA4AL-Q1 , TDA4VE-Q1 , TDA4VL-Q1
This section describes the standard transfer request (TR) format to initiate a DMA transfer. The TRs can support both half and full duplex with multiple dimensions as well as cache warms. The UTC (Universal Transfer Controller) does not have to support all types of TRs. Each TR will also generate a TR response. A TR can be sent to the UTC either through a PSI-L interface or an optionally supported Direct TR submission (previously QDMA) which will have Memory Mapped TR submission registers that can be written. The Memory Mapped TR submission registers further be classified by submission type either a single burst (atomic write) or multiple burst (non-atomic). The non-atomic TR will be sent when the submission register with word 0 is written.
Term | Definition |
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TR | A transfer request to move data. |
CR | A cache operation request. A request to send messages to a specified cache controller to prepare the cache for a future operation. |
UTC | Universal Transfer Controller the module in the UDMA architecture that handled the actual movement of data requested in the TR. |