Does anyone know if the 2 ground pins on the 328 are internally connected? I found info in the data sheet that says that I should have voltage to both VCC and AVVC, but I do not see anything about ground. I am running into a space issue and if one ground connection is sufficiant, then the issue is solved. If I need both to be connected, then I have a little more flippin' and floppin' to do. Thanks
They are connected internally but should also be connected externally so the current path can be common.
It will also help with the power distributional on the chip.
In short always connect all the ground connections externally if you don't want to ask for trouble.
Cool. Thanks Grumpy Mike.