[Lab] ATMEGA32U4 question

[Richard Sloan]

Exposed pad? to connect or not connect.

The EAGLE part does not have this pad shown.....

I just complete a layout using up all the inner space under the chip, no I
see the chip and it has a huge pad.....

Can it be left unconnected?

And if must be connected to VCC or GND?

Thanks!
Richard.

PS. Sorry for the cross post from ORE TO MODLAB for you people with both
feeds.
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