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Messages - kimmitanto

1
CPLD programmable logic / Using External 3.3V?
Hello

I'm doing a project with a CoolRunner-II dev board, and I was wondering if I can use my own 3.3V supply? I checked the diagram, and I would connect my 3.3V power to the "3V3" pin, and I would connect the "V+" pin to ground to disable the onboard 3.3V regulator ("V+" is connected to the "EN" pin of the regulator). Does this looks ok? Maybe having 3.3V on the output, and 0V on the input would break the regulator, or having it disabled is ok?

Maybe I would have to connect 3.3V to the "V+" pin too? But then, the regulator would be active, with the same voltage at its input and output...

Or it's not possible, and it would be easier to just use a 5V source to the "V+" pin and use the onboard 3.3V regulator?

Thanks in advance!

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