13.4.8 Data Transfers Modes

Data transfers are also defined by how the transaction is structured: the number of data transfers that can occur per trigger event, how events are counted and if the event repeats. The DMA Controller defines four transfer modes, which encompass all these features:

One-Shot
Repeated One-Shot
Continuous
Repeated Continuous

The transfer mode is defined by the TRMODE[1:0] bits (DMAxCH[11:10]). In addition, the RELOADS, RELOADD and RELOADC bits (DMAxCH[26:24]) can modify the behavior of some modes.

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