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Using an Emulator to defeat watchdog

Almost all the embedded designs I take credit for detect the presence of, or the operation of an emulator to defeat a watchdog circuit. Obviously when stepping through code, having the processor reset is not much help.
So, for the SHARC processors (ADSP-21065L & ADSP-21160N), the ICE TRST signal is used which goes high when the test port is active and the DSP core paused. Has anyone else done this, what has been your experience - or can you recommend a better way (by the way jumpers and switches or any miss configurable parts are not allowed).
Anyone know a down side to this, perhaps newer processor issues?


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