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PCB Layout and routing,Constraint Manager
"PCB design"
16.2
16.3
16.6
ADW
Allegro
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Allegro 16.6
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What's Good About Allegro PCB Editor Generic Cross-Section Files? See for Yourself in 16.6!
Beginning with the Allegro PCB Edito r 16.6 release, you are provided a methodology to export a technology (.tcf) or constraints (.dcf) file which is a generic cross-section. A generic-cross-section file (GCSF) captures constraints for specific layer types. Currently, a GCSF supports four types of layers...
Posted to
PCB Design
(Weblog)
by
Jerry GenPart
on Tue, Apr 9 2013
What's Good About Cadence Online Support Product Pages? – Check Out This List!
I wrote about the new Cadence Online Support features in one of my blog posts last year. One of our Silicon Package Board (SPB) Customer Support AEs suggested that I include the Cadence Online Support Product Page URL whenever I write about a specific product’s feature. I will be doing that --...
Posted to
PCB Design
(Weblog)
by
Jerry GenPart
on Wed, Mar 2 2011
What's Good About Formulas in Allegro Constraint Manager? See For Yourself in SPB16.3!
Since the initial release of Advanced Constraints, one of limitations was that formulas had to be recalculated manually. This recalculation could be done on an individual basis or for the entire design with the Calculate All command. The Online Formula Calculation feature addresses these limitations...
Posted to
PCB Design
(Weblog)
by
Jerry GenPart
on Wed, Dec 29 2010
PCB autorouter(spectraa) not converging
Hi, I am making my first pcb with a xilinx fpga device(256 pin BGA package).I am simply connecting the all I/O's to 4 standard 40 pin connectors.Are padstacks necessary for PCB routing??.I have drawn the schematic in Capture imported it to Layout_Plus and autorouted it. But after 3 hours of autorouting...
Posted to
PCB Design
(Forum)
by
bennyn1
on Thu, Sep 2 2010
What's Good About Via DRCs In Allegro Constraint Manager? It's In SPB16.3!
Current design technologies require extremely tight matching requirements right down to the overall net topologies to ensure that any deviations in propagation delays are minimized. As a result, design guidelines call for matching the number of vias for a group of signals. The prior releases of Constraint...
Posted to
PCB Design
(Weblog)
by
Jerry GenPart
on Fri, Jul 2 2010
Regarding Xnet properties getting lost
Hi, I am currently using 15.7 Allegro PCB Design XL. I have assigned Models to components to assign XNET properties. Whenever iam importing the latest netlist the Xnet properties are getting lost. Our schematic engineers are using Mentor Dx Designer to generate netlist in .tel format. Every time I import...
Posted to
PCB Design
(Forum)
by
kingshar
on Wed, May 26 2010
Shape to Route Keepin Spacing
OrCAD PCB Designer v16.2 I am getting the following DRC error, regarding an auto-generated shape (ground or power pours). I get it on multiple layers with multiple pours: Constraint Name = Shape to Route Keepin Spacing Required Value = 0 MIL Actual Value = 0 MIL Constraint Source = DEFAULT Constraint...
Posted to
PCB Design
(Forum)
by
melview1
on Tue, Feb 23 2010
Automatic Routing Update From Constraint Change
Hi Folks, I am in Allegro 16.2 and I have had to create a new Physical Constraint Set (PCS/Physical CSet) for which I want several nets and DPr(differential pair)/nets ro reference. I have changed the values for Line Width,Neck etc and they have saved. Is there a way to have these changes: 1) populate...
Posted to
PCB Design
(Forum)
by
Thomas M
on Tue, Dec 15 2009
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