Stats

  • Locked Locked
  • Replies 7
  • Subscribers 91
  • Views 16398
  • 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

Short violation

skow

 I did a verifyGeometry right after placeDesign -prePlaceOpt and had 1000 short violations.

The messages are : SHORT:

Special Wire of Net VSS & Pin of Cell U7178  ( M1 )
Bounds : ( 277.600, 31.035 ) ( 280.600, 31.365 )

SHORT: Special Via of Net VDD & Pin of Cell U35043  ( M1 )
Bounds : ( 348.000, 14.835 ) ( 351.000, 15.165 )

The display showed the short aligned with the power stripes; I did the previous short violation's suggestion to ensure VDD, VSS are properly set. The standard cell is provided by foundry so it should be fine. Is there anything else I missed?

 

 

Parents

  •  I have

    set rda_Input(ui_pwrnet) {vdd}
    set rda_Input(ui_gndnet) {vss}
    set rda_Input(PIN:VDD:) {vdd}
    set rda_Input(PIN:VSS:) {vss}
    set rda_Input(TIEHI::) {vdd}
    set rda_Input(TIELO::) {vss}
    and it failed the same so I use

    globalNetConnect VSS -type pgpin -pin VSS -all -override
    globalNetConnect VDD -type pgpin -pin VDD -all -override cmd again before the placement then verify geometry. The short violations are gone. Why the .conf did not work?

     

Reply

  •  I have

    set rda_Input(ui_pwrnet) {vdd}
    set rda_Input(ui_gndnet) {vss}
    set rda_Input(PIN:VDD:) {vdd}
    set rda_Input(PIN:VSS:) {vss}
    set rda_Input(TIEHI::) {vdd}
    set rda_Input(TIELO::) {vss}
    and it failed the same so I use

    globalNetConnect VSS -type pgpin -pin VSS -all -override
    globalNetConnect VDD -type pgpin -pin VDD -all -override cmd again before the placement then verify geometry. The short violations are gone. Why the .conf did not work?

     

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.