There is a document that claims that the chipset used in CASIO fx-ES series of calculators supports input voltages of up to 3.6 volts. Does anybody have any evidense that the calc will actually run off 3.3v instead of 1.5v?
Why I need it is simple: I basically want to interface the calc to an external 3.3v device, and having the same logical level on both devices would greatly simplify the schematic.
