o Library Characterization: The cell library (.lib file) specifies a maximum transition time for which the cell delays are accurately characterized. Exceeding this can lead to inaccurate timing analysis. Your max_transition value must be within this characterized range.
o
Very tight transition target can cause more
latency, unnecessary buf/inv insertion.
o
Thumb Rule: A common practice is to
set the clock transition target to be about 10-15% of the clock period as a
starting point, then tighten or loosen it based on power and performance
requirements.
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