1.1 About DSTREAM
DSTREAM is a debug and trace hardware unit that enables powerful software debug and optimization on any ARM processor-based hardware target.
DSTREAM enables you to connect a software debugger to an ARM
processor-based target using a hardware interface such as JTAG or Serial
Wire Debug (SWD). It also enables the collection of trace
from the device for non-intrusive debug and code optimization.
Some debuggers are unable to capture trace from the external
trace port of a System-on-Chip (SoC) device.
See the documentation that accompanies your debugger for details
of the trace capabilities of your debugger.