You can use these pins as analog input only. No internal pull up resistors. No digital read. Of course, however, you can always simulate digital read with analog read. These pins are broken out on the Nano and most Mini clones.
You can use these pins as analog input only. No internal pull up resistors. No digital read. Of course, however, you can always simulate digital read with analog read. These pins are broken out on the Nano and most Mini clones.