CLK pin voltage on Cyclone IV devices

[Altera_Forum]

Specifically referring to the EP4CE6 devices, which have a core voltage of 1.2V, what logic level should the CLK input pins be at? Do they reference the core 1.2V level or the VCCIO level of the bank the CLK pin is located in? 

 Thanks for the answer.. I'm still a noobie starting out here:)

[Altera_Forum]

I believe it will depend on which I/O standard that you used for the CLK input pins.

[Altera_Forum]

--- Quote Start ---  I believe it will depend on which I/O standard that you used for the CLK input pins.  --- Quote End ---    Thanks, that's what I was going to go with:)