I would say that you could drive the LCD from 3.3V.
I suggest you add a resistor of about 330R in series with any I/O that can be an output on the LCD. I think that just means the data lines.
The resistors would mean that the full 5V would only give about 5 ma so the clamping diodes on the PIC wouldn't be damaged.
You might just rely on the LCD not having any outputs if the R/W line is left on Write.
I suggest you add a resistor of about 330R in series with any I/O that can be an output on the LCD. I think that just means the data lines.
The resistors would mean that the full 5V would only give about 5 ma so the clamping diodes on the PIC wouldn't be damaged.
You might just rely on the LCD not having any outputs if the R/W line is left on Write.