Question: Reset TRST signal on JTAG port. Does this pin function just like it does on the C50 this when not connected or driven low?

Answer: The C50 and C52 function the same when it comes to the TRST, EMU0, and EMU1 pins. What might be happening is that when TRST is driven low, the EMU1 pin is also low and this puts the processor into an OFF condition (the processor does not run). The solution is to make sure that both EMU0 and EMU1 are high when TRST is driven low.