only the digital pins has pull-up resistors
No all the I/O pins on the processor have internal pull up resistors, even the analogue ones.
You can also put external pull up resistors on analogue inputs.
only the digital pins has pull-up resistors
No all the I/O pins on the processor have internal pull up resistors, even the analogue ones.
You can also put external pull up resistors on analogue inputs.