Stop Processor on Buffer Full 

Stops the trace information being collected when the trace buffer becomes full.

Stop Collecting on Buffer Full

Stops the trace information being collected when the trace buffer becomes full. The target processor is not stopped.

If you want the processor to stop whenever the trace buffer becomes full, you must select the option Stop Processor on Buffer Full.

Continue Collecting on Buffer Full

Continues collecting trace information while the processor continues to run, even after the trace buffer becomes full. In this case, older information is cleared from the buffer as new information enters it.

This option is overridden if you have specified a trigger and the trigger is reached.