Hello people,
I've built a circuit and sent it out for manufacturing, but I noticed that I tied VREF to VCC and I want to use the 1,1 V internal reference (maybe).
Is it possible to do this or will i short something?
Per datasheet:
If the user has a fixed voltage source connected to the AREF pin, the user may not use the other reference
voltage options in the application, as they will be shorted to the external voltage. If no external voltage is applied
to the AREF pin, the user may switch between AVCC and 1.1V as reference selection.
You're not supposed to connect VRef to Vcc.
If you do (or if you connect it to any other external voltage, for example to use an external reference voltage) you can't use the internal reference.
Too bad. Thanks for answering!
I've built a circuit and sent it out for manufacturing, but I noticed that I tied VREF to VCC
This won't be the 1st time someone's had to cut a trace on a board. 
You can usually cut a trace on the board to isolate a pin. I had to cut two traces on a board recently due to having two signals swapped. Then used 30 AWG wirewrap wire (solid) to go from pin to pin to make the correct connections. Review your artwork before cutting any thing, make sure the pin isn't one in a string that may need two cuts to isolate, and then a wire added to jumper around it for example.
If the trace is under a chip and everything is soldered, that makes it more complicated, especially SMD parts.
I will bring my sharpest cutting tool! Thanks for replying!