Quartus

Output port <name>.<name> cannot be assigned a value


CAUSE: In a Text Design File (.tdf), you assigned a value to the specified output port by using the port on the left of a Boolean equation. You cannot assign a value to an output port; in a Boolean equation, you must use an output port only on the right of the equation (that is, as a value).
ACTION: Replace the output port on the left of the Boolean equation with a legal symbolic,input port, or group name. If you want, use the output port as a value on the right of a Boolean equation.

See also:

Implementing Boolean Expressions & Equations
Ports

- PLDWorld -

 

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