Actually, my debugger connects to the card through another patch cable, since my board has a 4 pin connector for programming/debugging. This might be a reason for noise, as you suggested. Let me check again.


Another question : Is there a possibility that, the code in my controller flash has got changed while that code was writing/reading from the user area of flash doing normal execution? In this case, will the debugger see the changed code or the old code? Even if it is sees the old code, what gets executed would be the changed code, right? For example, when the debugger shows me the line that says LJMP ADDRESS, it could be something else in the code space?