Check clock settings
Check constraints on clock signals.
This check detects multiple constraints on clock signals that correspond to these industry-standard rules:
Rule 1.B.A.1: Design should have only a single clock and use only one edge of the clock. This rule may be violated if you have the
ClockInputsproperty set to
Rule 1.D.C.6: Do not use flip-flops with inverted edges.
Rule 1.D.D.2: One hierarchical level should have a single clock only. This rule can be violated if you set
Multiple, or your design uses trigger signals and enabling
TriggerAsClockcan result in clock signals at various levels in the hierarchy.
Results and Recommended Actions
To fix this warning, click Modify Settings and the code generator:
Rules 1.B.A.1, 1.D.C.6, and 1.D.D.2 of Basic Coding Practices.