Stats

  • Locked Locked
  • Replies 3
  • Subscribers 62
  • Views 15398
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Synthesis in rclabs using slow and fast library

Maheshnb

Hi good morning all,

                        i have written a code for inverter chain and synthesized using slow and fast lib sepaerately,which represents slow path and fast path helpful in timing analysis.

problem is how can i use this fast lib and slow lib together so that me inverter chain should select perticilar cells from slow lib for slow path and perticular cells from fast lib for fastpath simulataneously..............

please reply.........i need it urgently........

mahesh

9739436239

Parents

  •  Hi Mahesh,

     The scenario you are describing is unrealistic on the same design. slow and fast cells are not just different process but also different operating conditions so one library would end up extrapolated to the other's operating conditions which is likely not what you want since fast would not be fast at that point or similar if slow was extrapolated. However, if your libraries are indeed characterized to same operating condition but only process is differenet, then you can simply do

     

    set_attr library {slow.lib fast.lib} /

     

    as documented in the attribute reference and the user guide.

    hope this helps,

    gh-

Reply

  •  Hi Mahesh,

     The scenario you are describing is unrealistic on the same design. slow and fast cells are not just different process but also different operating conditions so one library would end up extrapolated to the other's operating conditions which is likely not what you want since fast would not be fast at that point or similar if slow was extrapolated. However, if your libraries are indeed characterized to same operating condition but only process is differenet, then you can simply do

     

    set_attr library {slow.lib fast.lib} /

     

    as documented in the attribute reference and the user guide.

    hope this helps,

    gh-

Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.