I just need some clarification of my circuit
Oscillator: So for my circuit I want to be able to program it via USB, the datasheet gets a bit confusing to me tho. If I read the datasheet correctly I need an 18.432MHz clock with 10pF capacitors tied to ground for USB application, does this sound right?
GPIO: Other than PA0, 1, 2 GPIO can only drive 8mA signals will this be enough to drive a gate on a ULN2003? I couldn't find a base current requirement. I'll be sinking a 3v relay on the other side of the gate.
Reset (kinda also GPIO): If all GPIO is pulled high until initialization is complete could I leave pins PA0, 1, 2 floating and still drive the TST pin high on boot to perform the SAM-BA Recovery Process?