A scenario is only as good as the data it loads. Each corner must load a consistent set of timing libraries, run at the matching operating condition, and use the matching interconnect extraction. This topic covers library sets, operating conditions and voltage sensitivity, mapping of interconnect corners, and temperature inversion.
Lesson | After it you can... |
|---|---|
Check that every library in a scenario matches the corner. | |
Estimate the delay cost of a voltage drop. | |
Choose the interconnect corner that is worst for a given net. | |
Explain why a cold corner can be the slow one. |
The scenario mixes conditions that never occur together, so some paths are timed optimistically or pessimistically and the reported slack does not match any real operating point.