Quartus

Groups cannot be assigned to nodes


CAUSE: In a Boolean equation in a Text Design File (.tdf), you assigned a group to a single node. You cannot assign a group to a single node because there is not enough space in the node for all the group bits.
ACTION: In the Boolean equation, assign groups to groups only. If the left and right of an equation have groups of different sizes, the number of bits in the group on the left must be evenly divisible by the number of bits in the group on the right.

See also:

Defining Groups
Group Ranges & Subranges
Groups
Implementing Boolean Expressions & Equations

- PLDWorld -

 

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