Hi
The Tower boards have an integrated OSJTAG debugger on the processor boards. This means that no external debugger is required.
There is also a standard Cortex debug + ETM connector which can be used by external debuggers which conform to this standard. The Cyclone Pro from P+E doesn't support ARM processors as far as I know (only HC08 HCS08, HC(S)12 and Coldfire+/V1).
Regards
Mark