Hi all, I'm building another arduino compatible board. I'm working partly from the UNO schematics this time and I have noticed a few components that I haven't used before when building quick boards or when using the 328P on a breadboard. I guess they must have been included for a reason, but is it worth including some / any / all of them?
- R2 - 1M resistor between the XTAL pins?
- C6 - 100n cap between vcc and gnd?
- D2 - diode between rst and 5v?
- C4 - 100n between AREF and gnd