Using ADC input pins to route vcc

[amateur_25]

Hi
I trying to layout my own pcb based on someone elses schematic. Due to how the board is laid out, it easier to use one of the extra ADC pins avaible on the TQFP package to forward pwr onto the right hand side of the board. The datasheet says it only functions as an ADC input. Am I correct in saying it's safe to do so?

I'm using pin19 on the 328P TQFP.

[Psi]

Do you mean you need to get VCC from one side of an IC to the other and you're asking if you can go "through" an unused input pin?

[vk6zgo]

I don't know the device,but it sounds scary as hell to me!

[T4P]

Does a 328pin TQFP even exist 

[TerminalJack505]

I'm guessing that he is saying that he is going to route to the Vcc pin as well as the unused ADC pin.

I don't see why you couldn't do this.  It is an input pin, after all.

Does a 328pin TQFP even exist 

LOL.  I'm pretty sure he's talking about the "Arduino chip."     Aka Atmel ATmega328P.

[Psi]

You just have to route it so any voltage drops in vcc tracks don't result in a higher voltage on the input pin than the actual VCC pin.
Or it will feed backwards into the chip from the IO and may cause problems.

It's not an issue unless you happen to be powering something else from in between the vcc<->inputpin link.