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

I didn't say "the SX the input voltage MUST be 5 volts".
I said "[b]When I want to program[/b] the SX the input voltage MUST be 5 volts." 

Okay I have a voltage coming into my board that gets regulated down to 3.3V.
And that voltage is connected directly to the SX-Key header.
So, when I attach the SX-Key that input voltage MUST be 5.0 volts to program the SX on my board.

All I'm saying is, the SX on my board CAN run at 3.3 volts while being programmed by the SX-Key that has 5.0 volts going to it.

Bean.

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