ahh forgot to ask. What are the hardware requirements for using ISP/debugWire? I assume the pins on the uC can also be used as I/O, so if your using one of them as such you have to isolate whatever the lines connected to so it doesn’t interfere with ISP. Thats a given though but for using ICSP on a pic you always included a diode from VCC to MCLR/VPP for over voltage protection. Is there anything like that required for the AVR?