Yes, Yes Yes! I think this is my problem I keep having.
Is it only a problem if i enable the pullup on the specific pin with the 5v signal. As in,
If I use an internal pullup on a single pin that is attached to a 3.3v device.
Does this mean I can't attach a 5v device to a different pin and use an external pullup? Meaning that once the pull up is enabled on one pin, 5v is out for all other pins. Or is it just pin specific.
If that makes sense.
Thanks in advance.