No you can't
I do not think it is economical to reserve 16 I/O  for keypad.


Andre



> I have an hex keypad with 16 pins (one for each key) and 1 common.
> Can I use this type of keypad in a project that requires a 4x4 matrix
> keypad (8 lines/pins)(row/column selection)?
> How can I do that?
>