21.1 Design Flows with SmartTime

Access SmartTime in Designer either implicitly or explicitly during the following phases of design implementation:

• After Compile – Run SmartTime to add or modify timing constraints or to perform pre-layout timing analysis.
• During Layout – When you select timing-driven place-and-route, SmartTime runs in the background to provide accurate timing information.
• After Layout – Run SmartTime to perform post-layout timing analysis and adjust timing constraints.
• During Back-Annotation – SmartTime runs in the background to generate the SDF file for timing simulation.

User can also run SmartTime whenever they need to generate timing reports, regardless of which design implementation phase.