The Keil Board support pack for SSE-200 on MPS3 ARM::V2M-MPS3_SSE_200_BSP version 1.0.0 does not support trace output in Arm® Keil® μVision®. However a patch file has now been created that allows trace to be viewed with this BSP. Below are instructions on how to install the board support pack and patch and view trace for SSE-200 on MPS3 (Application note AN524).
In Arm Keil μVision, under Projects>Manage>Pack Installer you can find the “ARM::V2M-MPS3_SSE_200_BSP”. Install the pack, as it contains software components like peripheral drivers and example software for the target platform.
This pack can also be download from Keil website: http://www.keil.com/dd2/pack/
If the trace does not work then follow these instructions to patch the pack installation of ARM.V2M-MPS3_SSE_200_BSP.1.0.0.pack:
For windows machines it is usually C:\Keil_v5\ARM\PACK\
<debugconfig default="jtag" clock="1000000" swj="true" sdf="Debug/SSE-200-MPS3.sdf"/>