I've configured a K20 GPIO pin (PTC4) as an input pin with the Kinetis Design Studio Driver BitIO.
Now it is possible to detect lows and highs on this pin. But after the High applied to this pin and left floating again the pin is on ~3V. The internal pull ups and downs are disabled.
Is this a normal behavior or can this near-high-level on a input pin after an attached high lvl be bypassed (without a pull down)?