Re: Queries in CTS stage
Hi tachyons,
Prior to CTS the design should be
1. Placement completed
2. Power and ground nets should be routed
3. Congestion and timing analysis should give acceptable results
4. No cap/tran violations
5. HFNS completed
6. All clocks are defined and No propagated clocks
For skew/latency numbers
the tool calculates the skew values by comparing the arrival times of the clock signals in a clock domain..if you do not specify max skew it will be considered as "0".
Similarly the insertion delay will be checked after synthesizing the initial clock tree to meet the min value if not buffers will be inserted to meet the value.Default is "0".
Balancing of Skew is the most important metric for qualifying CTS
cheers,
Pavan GS