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I think that when a CPU runaway occurs, the PC jumps to a free ROM area and performs some kind of operation there. What processing should the PC do from the view point of a CPU?

April 26, 2017area CPU Free jumps occurs pc performs ROM runaway think

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I think that when a CPU runaway occurs, the PC jumps to a free ROM area and performs some kind of operation there. What processing should the PC do from the view point of a CPU?

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• Answer :We think that it is desirable to pad the free ROM area with undefined instructions. We also think it is desirable that FMC-16LX series dare to pad the free ROM area with undefined instructions to cause an exceptional interrupt and perform necessary processing (e.g., LOG write to E2PROM) for reset. This is because when an undefined instruction is executed, an exceptional interrupt occurs.