In a design, the input and output enable of the same tri-state node should not be driven by the same signal source. The following image shows an example of the same signal source driving the input and output enable of a tri-state node:
The input and output enable of the tri-state node should be driven by separate signal sources.
Important: Important: This rule can be
turned on or off as a global setting for
the entire design on the Design Assistant
page; or enabled or disabled for nodes, entities, or instances with
Rule S101. This rule has a
High severity level.