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

It doesn't sound like the brown out setting is your problem  The SX28 can run at 3.3V so even if your power supply drops to 4V the SX28 should still run.

The scary part is "when hit with a static discharge to the chasis" and concerns me that the static charge may be getting to the chip.  Does the chip just die or does it actually/physically burn up??  Big difference!  If it just dies have you tried using the SX Key to download your program on the off chance that you just lost the code on the chip?

If your circuit is subject to Static shocks, etc then you have to seriously look at what you're doing.  If this was a mobile robot then some leave a beaded pull chain dragging to help dissipate the static charge before one builds up.  You'll also want to make sure your power is properly conditioned with filter caps, etc and if you are controlling things with the SX chip that you consider opto isolators and other things to protect the micro controller.  My guess is that what your are seeing would probably happen with any controller you use and isn't a problem with the SX28.

Do you have a schematic or picture of your setup?

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