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

Hello Robert,

to be honset, I'm not really a BASIC Stamp expert but I can't see a reason why the OEM Stamp chips should not run from a 3.3V supply, as long as you use 3.3V-tolerant components around the chip. To my knowledge, the serial EEPROMs usually used for program memory are rated down to 3.3V. I have tried an SX28 together with a 24LC64 EEPROM, and a MAX3232 on my RS-232/I²C-Adapter, all powered at 3.3V without problems.

Concerning pin 37, there may be other forum members, more experienced with the Stamps, might give you a better advise but I think you should leave it connected as is.

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