This section shows generic EDMA features. For
features applicable to the EDMA instances in the device, see the device-specific
Integration section.
The EDMA_TPCC channel controller has the following features:
- Fully orthogonal transfer description:
- Three transfer dimensions
- A-synchronized transfers: one dimension serviced per event
- AB-synchronized transfers: two dimensions serviced per event
- Independent indexes on source and destination
- Chaining feature allowing a 3-D transfer based on a single event.
- Flexible transfer definition:
- Increment or FIFO transfer addressing modes
- Linking mechanism allows automatic PaRAM set update
- Chaining allows multiple transfers to execute with one event
- Interrupt generation for the following:
- Transfer completion
- Error conditions
- Debug visibility:
- Queue water marking/threshold
- Error and status recording to facilitate debug
- 64 DMA request channels:
- Event synchronization
- Manual synchronization (CPUs write to event set registers EDMA_TPCC_ESR and EDMA_TPCC_ESRH).
- Chain synchronization (completion of one transfer triggers another transfer).
- Eight QDMA channels:
- QDMA channels trigger automatically upon writing to a parameter RAM (PaRAM) set entry.
- Support for programmable QDMA channel to PaRAM mapping.
- Each PaRAM set can be used for a
DMA channel, QDMA channel, or link set.
- Multiple transfer controllers/event queues.
- 16 event entries per event queue.
The EDMA_TPTC transfer controller has the following features:
- 64-bit wide read and write ports per TC
- Supports two-dimensional transfers with independent indexes on source and destination (EDMA_TPCC manages the third dimension)
- Support for increment or constant addressing mode transfers
- Interrupt and error support
- Memory-Mapped Register (MMR) bit fields are fixed position in 32-bit MMR regardless of endianness