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The following rules apply to Defaults Statements:
Only one Defaults Statement is allowed in the Logic
Section, and it must be the first statement after the BEGIN
keyword.
If a single variable is assigned a value more than once in a Defaults Statement, all assignments but the last are ignored.
A Defaults Statement cannot be used to set a default value of X
(don't care) to a variable.
Multiple assignments to a node of type NODE
variable outside
of a Defaults Statement are logically ORed, except when the default for
the variable is VCC
, in which case the assignments are logically ANDed. Example
Active-low variables that are assigned
more than once should be given a default value of VCC
. Example
- PLDWorld - |
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