I have a uc1609 5V display and i think that 5V only applies to supply voltage and not for the communication pins, because in the chip datasheet says max voltage on communication pins is 3.3v?, do i have to use a voltage shifter?
I already tried it with a voltage shifter on all pins except rst because i ran out of channels on the shifter and it only works sometimes and only on certain pins, not all which is kinda weird.