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Oct 31, 2013 at 20:35 comment added DoxyLover I don't know if you have any bi-directional lines. If not, you can use the divider for inputs and either hope the ROM will accept your 3.3V logic outputs or else use a simple transistor stage (MOSFET or BJT and a couple of resistors) for the outputs to the ROM. Using a transistor will invert the signal but you can correct in software.
Oct 31, 2013 at 17:52 comment added Romain B Actually I will use both input and output, I am trying to read from ROM memory chips from a Gameboy cart. They require need Vcc = 5V but will (likely) see 3.3v as high input level for the address. I assume the ROM will output data as 5v high level.
Oct 31, 2013 at 3:20 history edited DoxyLover CC BY-SA 3.0
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Oct 31, 2013 at 3:15 history answered DoxyLover CC BY-SA 3.0