Max_Sink_trans value specifies the clock slew, can some one please let me understand how it is going to affect the timing of my design? Please let me know if it has to be less than the max_transiton_delay in liberty file? or the max_transiton_delay is for the Dpins of the flip flops and max_sink_trans is not dependent on the transtion delay for which the library is characterized.thanks
In reply to Kari:
thank you very much for the reply.Can you clarify the following queries pls.
1) in the library there is a default_max_trans value .is this applicable for both "D" pin and "clk" pin of the flip flop in the library? or just for "D" pin.
2) Can you pls elaborate on how the max_sink_trans value is going to affect delays of the flip flops?
In reply to gops:
i believe the default_max_transition will cover any pin that doesn't have a tighter constraint.
for your second question, i'm not a timing expert, but you can look in the .lib tables and see how a transition in the range of what you specify to CTS would affect the delay vs. the max transistion. i'm not sure if i understand your question though.
a small confusion in .ctstch file
1.what are buffer_max_transition sink_transition , how they effects on timing report
2.is there any relation between sink_transition and the cell_delay ?
thanks in advance