I am working on AMS design and doing digital block P&R separately, i am getting lot of congestion near the pins (working on 3Metal layer design) after the CTS hold opimization (in the placement stage no congestion) and adding lot of buffers to solve hold violation and the design is not routable with nanoroute.then i increased tried but i got same result.
1. how to dump the pins and re arrange as per my requirements, any scripts (below mail mentioned, pin editor), plz provide the script if available.
2. why Encounter is adding lot of buffers in the hold opimization (encounter verson 6.2, AMIS lib with 0.35uTech)
3. After CTS hold optimization, the utlization is around 75%, then also nanoroute is not able route the design?
before hold optimization i have used the following command for not put many buffers
4. the design is not routable may be one reason lot of congestion in perticular area, why tool is placing the cells apart because there is lot of space is empty (placement satge, utilization is 60%)
5. how to dump the pins and re arrange as per my requirements, any scripts (below mail mentioned, pin editor), plz provide the script if available.
Please suggest ASAP.
Thanks & Regards,