Quartus

Clock input port of fast PLL <name> must be driven by an I/O pin


CAUSE: The clock input port of the specified receiver fast PLL is not driven by an I/O pin. However, for better receiver input skew margin (RSKM) performance a receiver fast PLL requires a dedicated connection between an I/O pin and the clock input port.
ACTION: Modify the design so that an I/O pin drives the receiver fast PLL.

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