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

Chris, I'll give that a try. I have a few battery packs I can use to test with. If that turns out to be the case, should I disconnect the power and ground leads from the Key Ring?

Since the VDD doesn't pass throught the Key Ring and the VSS does, I thought it needed to be grounded with the rest of the system. I can see how that might cause a problem with different voltages on the same board.

Thanks again for helping me with this problem,
Dan

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