16.3.4.1.1 User Software Control

Software starts or stops DMA transaction by setting/clearing the DGO bit. The DGO bit is also used to indicate whether a DMA hardware trigger has been received and a message is in progress.

Important:
  1. Software start can only occur when the EN bit is set.
  2. If the CPU writes to the DGO bit while it is already set, there is no effect on the system, the DMA will continue to operate normally.