Debugging systems with ROM at the exception vector

When debugging processors without vector catch hardware and with ROM rather than RAM at the exception vector, you must disable vector catching. This prevents debug hardware from trying to set hardware breakpoints on the vector table.

The default setting is to enable, exception trapping on reset, prefetch abort, and data abort. On a processor without vector catch hardware, three breakpoint resources are used in ROM. Therefore, if a processor has three or fewer resources, you cannot debug applications running on that processor.

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