I'm looking for output rise time curves for 3V3 and 5V supply into a hiZ load with 20-30pF of capacitance. With my scope it seems to be around 3ns, but at 1Gsps, the sample resolution sucks.
I found some old threads talking about IBIS files, but I've never used them before. I'm wondering if anyone has generated the curves for either the ATMega328P or the ATTiny85.