• 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. Blogs
  2. System, PCB, & Package Design
  3. What's Good About Allegro GRE 2 Point Flow? It’s in the…
Jerry GenPart
Jerry GenPart

Community Member

Blog Activity
Options
  • Subscribe by email
  • More
  • Cancel
CDNS - RequestDemo

Try Cadence Software for your next design!

Free Trials
PCB
PCB Layout and routing
bundle compression
interconnects
2 point flow
global route
Routing
High Speed
Allegro 16.5
PCB Editor
Layout
design
PCB design
SPB16.5
Allegro PCB Editor
GRE
disabiling bundle compression
Allegro

What's Good About Allegro GRE 2 Point Flow? It’s in the 16.5 Release!

15 May 2012 • 1 minute read

The 16.5 Allegro Global Route Environment (GRE) has been enhanced by what we call a 2 Point Flow. These flows provide the benefit of both a guided flow and the simplicity of a default flow.

The 2 Point Flow:

  • Provides the benefits of a default flow - no path between the gather points
  • Provides the guidance that is needed   - liberty to exit in the direction of choice

For example, if you wish to provide 'no' guidance to some bundles, let the router pick the best path for all the members. So, you route the bundle spatially. Suppose you don't like the way the route exited the component. You wanted it to exit north instead of west as it chose to. Change the bundle's properties to be 'Guided', and place the gather points at the appropriate exit locations. Run the router again and you should see the routes exit the component in the desired direction, yet still be able to route on their own in between the gather points.

Read on for more details  …

In GRE, click the RMB on the bundle and select Bundle Properties > General:



 

You can watch a video of this capability available on Cadence Online Support.
 

Plan Spatial when Guide Router is OFF:




 

Plan Spatial when Guide Router is ON:




 

Please share your experiences using this capability.

Jerry "GenPart" Grzenia


CDNS - RequestDemo

Have a question? Need more information?

Contact Us

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

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