Stats

  • Locked Locked
  • Replies 6
  • Subscribers 166
  • Views 9475
  • Members are here 0
More Content
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Jumpers - and how to short them

TH Designs

A lot of times, especially for prototype circuits, I'll have to include a jumper in a trace. This jumper would have two through hole pads separated by 0.1" and tied together with a copper trace that could be cut  during circuit debug / development. Coming from layout, I had a symbol with the two pads and used the "detail" obstacle to create the copper trace between the pads. This worked very well and dod not give me any errors.

That same symbol, now converted to 16.6, gives me DRC's as it sees the trace between the two pads as a short. I sould mention that the schematic symbol is simply two opposing pins with circles and a line between them "symbolizing" the short, there is no real wire connection between the two pins on the schematic. (thus the DRC).

I was wondering how to approach this in 16.6. Could I edit the symbol and put the trace on some alternate layer / class like board geo or pkg goe and then include that class in the gerber generation? I have tried a few things but have had no success, looking for ideas or how thers may have approaced a similar situation.

  

Parents

  • Tom Allegro doesnt handle this very well. It is expecting to see one pin per net. Only way I know to do it is create a 2 pin symbol in capture that looks like a standard jumper and then short those two pins out with a wire in capture. Over on the board side you should be able to route those two pads on your jumper part together. Not ideal but the netlist will match the schematic.

    Only other way as you suggested is to use an alternate class layer and put a line between the 2 jumper pins/pads but chances are it might be easy to foregt to turn that layer on in the gerber creation, so no short..

     Thanks Scott

     

Reply

  • Tom Allegro doesnt handle this very well. It is expecting to see one pin per net. Only way I know to do it is create a 2 pin symbol in capture that looks like a standard jumper and then short those two pins out with a wire in capture. Over on the board side you should be able to route those two pads on your jumper part together. Not ideal but the netlist will match the schematic.

    Only other way as you suggested is to use an alternate class layer and put a line between the 2 jumper pins/pads but chances are it might be easy to foregt to turn that layer on in the gerber creation, so no short..

     Thanks Scott

     

Children
No Data
Cadence Guidelines

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.