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

I never thought in terms of a short, after checking the bad protoboard, there were no shorts. After I removed the SX52 chip from the protoboard, the extreme heat condition went away. The strange part is, when I had a 9 vdc source plugged into the protoboard, it never heated up like that, it is only after I plugged in the 17 vdc source that the heat showed up. I also decided to take a chance, and plugged the 17 vdc source into a new protoboard, no excesive heat problem. I guess that the SX52 chip itself can get shorted, but how that happened, I do not have the slightest idea. I think the mystery is solved.

Ray

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