I'm posting here because a pin on my ATMEGA644 (PC2 to be precise) is being pulled down (even when the atmega is not being powered).
The internal resistance (in the ATMEGA itself) between this pin and the ground went from 1.5k to 350 ohms (tested when not powered) when I added a pull up resistor to counter act the effect of this parasite pull down (as this pin was configured as input).
This pin hasn't suffered any bad treatment, it was configured as input with internal pull up, and a button was connected to it.
Thus, I was curious if anyone already had this problem, and if it is common?
Let me know if i am not clear enough :)