Stats

  • Locked Locked
  • Replies 6
  • Subscribers 125
  • Views 14003
  • Members are here 0
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

How to drive many pins using a single driver?

A98N

 Hello All,

Assuming there are 10 input pins in a schematic view need to be set at either 0 or vdd. Is there any way to set them using a signle vdc?, or 10 independent dc supplies are necessary for such a test?

 

Thanks,

A

  • Hi,

    I may be missing something here, but it seems to me that you would use one source to supply a voltage to net "vdd" (say 5 volts), and then you connect net vdd to the inputs that need to be driven to that voltage.  For the inputs that need to be connected to 0v, these would probably connect to the "gnd" net (where I'm assuming the other terminal of the vdd supply is connected to).

    If you are simulating in ADE there is the capability of using a stimulus file where you can set up the stimulus in a graphical (or textual, I believe) way, driving the schematic pins directly without needing a test bench.

    I hope this helps, but if not, please clarify your requirements.

    Regards,

    Lawrence.

  •  Hi Lawrence,

    In a case that those inputs should be changed duing sumulation, or at different corners,then hard wiring does not help. I remember it was possible by setting a binary number somewhere in the source then the results could be applied to a bus. But I am not sure about the details.

    Regards,

    A

  • Maybe this solution gives you what you want?

    Regards,

    Andrew.

  •  Hi Andrew,

    It needs Host ID, which I am not aware of, to read the link. Is there other way to read the solution.

     Thanks,

    A

  • If I understand correctly, you can use (e.g "wire name" command from "Add" menu in schematic editor) net name vdd to your 5V source and vss/gnd! for 0V/gnd source. And then use corresponding net names to the 10 input pins that you have referred. ( There is another easy way if you name all the 10 inputs as a bus say input and then you can even use net name separated by commas as for e.g vss,vss,vdd,vss,vdd,vdd,vdd,vdd,vdd,vss ...assuming that is the sequence for you 10 input signals).

  • You need the hostid of your license server in order to register. If you're at a university, you can get limited access - depending on your university program. If under Europractice (e.g. in Europe) you might want to contact Europractice for details on how to get access for reading solutions.

    Best Regards,

    Andrew.

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.