overshooting would need some inductance or capacitance...
i think both r very little inside the MCU...
maybe the wires to the oscilloscope did it?
i had that once with a 12V power cable that was connected to a capacitor via a FET... 
overshooting would need some inductance or capacitance...
i think both r very little inside the MCU...
maybe the wires to the oscilloscope did it?
i had that once with a 12V power cable that was connected to a capacitor via a FET...