16.4.2 Source/Destination Stop
The SSTP and DSTP bits determine whether or not to disable the hardware triggers
(SIRQEN = 0), once a DMA message has completed.
When the SSTP bit is set and the DMAnSCNT = 0, then the
SIRQEN bit will be cleared. Similarly, when the DSTP bit is set and the DMAnDCNT =
0, the SIRQEN bit will be cleared.
Important: The SSTP and DSTP bits
are independent functions and do not depend on each other. It is possible for a message
to be stopped by either counter at message end or both counters at message end.