ID:176692 Pin <name> driving clock input pin of fast PLL <name> cannot have I/O standard <name>

CAUSE: You assigned a I/O standard to the specified pin driving the clock input pin of the specified fast PLL. However, the I/O standard cannot be supported by the fast PLL.

ACTION: Change the I/O standard assignment so that all the differential I/O pins driven by the specified fast PLL, as well as the clock input pin of the fast PLL, have the same I/O standard.