Forum Discussion

CNash2's avatar
CNash2
Icon for New Contributor rankNew Contributor
6 years ago

VCC_CLKIN on cyclone iv gx150

If I have single ended CLK inputs 3.3V LVTTL in bank3a, b or 8a, b does it matter what voltage is applied to VCC_CLKIN. I guess it only matters if one of those bank is using a differential input cl...
CNash2's avatar
CNash2
Icon for New Contributor rankNew Contributor
6 years ago

I have 3.3v LVTTL clock signals on bank 3a, 3b and 8a, but differential clock input on 8b. So I will put 2.5V on Vcc_clkin8b but 3.3V on the others. Is this correct?