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

Comments(0)Filed under: PCB Layout and routing, PCB design, Allegro PCB Editor, Allegro, PCB Editor, PCB, layout, GRE, global route, design, routing, High Speed, SPB16.5, Allegro 16.5, bundle compression, disabiling bundle compression, interconnects, 2 point flow

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


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