Quartus

One or more pins use input reference <name>, but that input reference is not enabled


CAUSE: You set the Input Reference logic option to As VREFA or As VREFB, but you did not enable the VREF A or VREF B pin.
ACTION: Enable the VREF A or VREF B pin, for example, by turning on Enable VREF A pin or Enable VREF B pin in the General tab of the Device & Pin Options dialog box.

See also:

Overview: Making Assignments
Specifying General Device Options

- PLDWorld -

 

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