• Skip to main content
  • Skip to search
  • Skip to footer
Cadence Home
  • This search text may be transcribed, used, stored, or accessed by our third-party service providers per our Cookie Policy and Privacy Policy.

  1. Community Forums
  2. Allegro X PCB Editor
  3. OrCADX_23.1 : how to show default PPr (PinPair) associated...

Stats

  • State Verified Answer
  • Replies 2
  • Subscribers 159
  • Views 3057
  • Members are here 0
More Content

OrCADX_23.1 : how to show default PPr (PinPair) associated to EVERY Xnet / Net ? +other questions on PPr

grax
grax over 1 year ago

Hi

Q1: How is possible to show PinPair for EVERY Xnet / Net  inside Constraint Manager?

Q2: Is there any DEFAULT PinPair created together with Xnet / Net ??

What I mean is that the topology associated to Xnet is done by the CAD tool and can be analyzed graphically by SigExplorer; but there is no information regarding the PPr which will be used at the end by the router (RePPr?)

Q3: In some doc I found RePPr which correspond to Result-PinPair, could you explain what is the difference respect to a normal PinPair? who to show RePPr ?

Q4: Inside Constraint Manager I discovered I can setup PINUSE (OUTPUT and INPUT) on CM > PROPERTIES > COMPONENTS > PIN PROPERTIES > PINUSE; this FUNDAMENTAL parameter does affects how Xnet are generated. Is it possible to REBUILD new Xnet set AFTER modifing PINUSE ?? this would be VERY USEFULL since PINUSE is NOT accessible from the SCHEMATIC and changing the Pin Type inside the schematic is quite complicated (lib issues)

Q5: imagine a simple TX > lane > RX / then PIN TX driver has NOT been configured as OUTPUT nor the RX as INPUT.

The serpentine compensation must be done close to the RX

How to OBLIGE the PCB engineer to route starting from the TX pin and not from the RX pin? in which case the serpentine routing compensation will be ERRONEOUSLY located close to RX

Thanks in advance for your support

L

  • Sign in to reply
  • Cancel
Parents
  • grax
    0 grax over 1 year ago

    Sometimes the PPr are generate INVERSED. Pin1 = Rx and Pin2 = Tx / how to swap them ??

    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Verify Answer
    • Cancel
Reply
  • grax
    0 grax over 1 year ago

    Sometimes the PPr are generate INVERSED. Pin1 = Rx and Pin2 = Tx / how to swap them ??

    • Cancel
    • Vote Up 0 Vote Down
    • Sign in to reply
    • Verify Answer
    • Cancel
Children
No Data
Cadence Guidelines

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.

© 2025 Cadence Design Systems, Inc. All Rights Reserved.

  • Terms of Use
  • Privacy
  • Cookie Policy
  • US Trademarks
  • Do Not Sell or Share My Personal Information