Hi John, I want to follow up with some "check to see if there is water in the pool before you dive in" warnings. There is a lot of confusion out there on:
- what are corners,
- the difference between traditional sign-off corners and global corners,
- how derates work, and
- how STA uses all of the above.
WARNING: Synopsys and Cadence are pushing new capabilities in derates and timing that are NOT compatible with existing sign-off practices -- and these derates are NOT blessed by TSMC, Samsung, nor GlobalFoundries. Before you sign up to Synopsys or Cadence derates for sign-off, it pays to learn what this all means.