Lpc2000

The Philips ARM7 implementation can not be debugged through Reset for 
a very simple reason, it is called code security.

At reset, all debug channels are disabled to ensure that nobody can 
break into the chip. Then the code security memory cells are 
evaluated. If security is not desired by the programmer, the debug 
options are enabled. 

If Debug options would not be disabled in the beginning, there would 
be a time window that can be used to force entry into the device. 

ARM7TDMI, the core itself could be debugged from reset, correct but we 
prefer a higher security over minor restriction for debugging. 

Robert