It would be useful to put words of this form somewhere into the user manual. Thanks for the clarification. Michael >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 > > > > > > > > >Yahoo! Groups Links > > > > > > > >
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Re: [lpc2000] Debugging from Reset (was Re: destroyed LPC2138 via software)
2005-10-26 by Michael Johnson