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Steps for Back Annotating Resequenced Refdes to CIS

dschaefer

Has been a while since I last went through this process and can't seem to get the resequenced designations back into the schematic.

What are the steps to properly back annotate information from Allegro / PCB Designer to Capture?

  • steve

    Save the board file, then in Capture use Tools - Back Annotate, PCB Editor Tab, brosw for the board file, sprcify the netlist directory and there you go.

  • dschaefer

     My problem was the pcb and schematic were in separate folders. The Cadence tools require all files to be in 1 big folder in order to facilitate the back annotation process.

  • Khurana

    Don't think so...if memory serves me right I have been able to use the browse button (for PCB Editor Board File field) to select the desired .brd file for backannotation.

  • dschaefer
    From Cadence support:

    In your project directory you should have the schematic design’s opj and dsn schematic files and an allegro directory.  In this Allegro directory you need to have the board file, the original pstxnet.dat, pstxprt.dat, pstchip.dat netlist files, and the compview.dat, funcview.dat, pinview.dat, and netview.dat changes file.  These netlist/change related files along with the board file MUST all be in the allegro folder.  I have attached an application note regarding the back annotating from the PCB editor to OrCAD capture for your review.

    I was confused by the navigate to file selection as well, and that did not work here.
  • steve

    The important thing with back annotation is making sure that the schematic and PCB are in sync BEFORE you start making changes. Create a netlist and import it into the PCB. Once this is successful, make the changes to the PCB and then save. Then follow the Tools - Back Annotate command, PCB Editor tab, check the location directory of the original netlist files and new board file (as Cadence support say) and then go. 

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