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Altera_Forum
Honored Contributor
15 years agoWhen I have seen this, it has been because my code had memory write errors or I misprogrammed DMA and either case hit memory used by the jtag debugger part of system. Sometimes when you blow away memory the debugger disconnects immediately. I think in your case it's already dead and it doesn't know it until you tell it to pause execution.
If the program is too simple and you're sure it cannot be this, then it could be your DRAM controller is not set up right or you have DRAM that is misbehaving. Bill