In ATmega32u2's reference manual, there's a diagram for USB-powered application like shown below.
Should I, or should I not, connect the GROUND to VSS/UVSS line? And why? If not, then what to do, just connect GROUNDs together?
Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up.Sign up to join this community
I've also noted, that on the ATmega32u2 pinout (manual, Fig.1-1 on p.2), there's neither VSS nor UVSS mentioned, but there's both GND and UGND, which supports this interpretation.