In SX Microcontrollers, SX/B Compiler and SX-Key Tool, mebikerider wrote:

Hardware guys, please correct me if I'm wrong about this, but I would think that the entire silicon guts of the chip would be located at just a small section near the center of the 28 pin package, which would be about where pin 7 is in the 28 pin package.

So just because a hot spot and a crack developed near pin 7, that wouldn't necessarily mean that the heat was due to pin 7 functionality; it could be from any part of the silicon that happens to be embedded near pin 7.

How are you driving the relay? Is there any chance that inductive voltage spikes are making their way back into the SX and zapping something?

David

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