Sorry for noob question
I have some external line (pin) where usually high level (2.8V) on it and some times low level (20ms)
how connect -
is it enough connect this external pin direct to D2 (Nano board) without resistor (pullup/pulldown/etc) ? pls find attach
and how setup pin and interrupt to catch low level
Yes, but what is it?
I can't find that figure in the processor datasheet - where did it come from?
What does "AL" mean, in terms a person familiar with the processor family would understand?
At the left-top of Fig-1 of Post-8, there are other acronymes like FE, RE, and AH; but, why have you been particulalry interested for AL? It is for Awami League - the Ruling Party of Bangladesh. Do you believe?