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auto router,Constraint Manager

  • 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
  • Allegro (16.0) autorouter and constraints

    so, I still have the problem that the Allegro autorouter violates my constraints, and I don't know why. if I put my smd_pad to via spacing at 16 mils, it will place a via at 12 (sometimes) and if I set it at 12, it will place it at 8 (or something). it's not like the autorouter can't place...
    Posted to PCB Design (Forum) by sharted on Wed, Jun 30 2010
  • 16.0 Autorouter ignoring constraints

    hello all, I am fairly new to Allegro (16.0), so bear with me. I am trying to use the autorouter, and it is killing me. first, it wont connect VCC and GND nets to my VCC and GND planes, even though the autorouter says it's 100% complete. second, it is ignoring my constrains when it autoroutes. it...
    Posted to PCB Design (Forum) by sharted on Tue, Jun 22 2010
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