I'm currently migrating a project from series 0/1 to series 2 tinyAVRs. I'm now using the ATTINY1626. Migration worked fine, except for my code to read the VDD supply voltage (without external circuit), see AN2447. That's a crucial feature and I'm not sure if the series 2 AVRs can actually do it. The only information I found was that here:
Now I'm massively confused ;-) I can set VREF to 1.024V on the series 2 (1.1V on series 0/1), so that seems to be fine. But then what should I choose as internal voltage? Just ADC_VDDDIV10 instead of ADC_INTREF?! Will that work?