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How to change the pin function in Capture

Manhnq

Hi everbody,

I am designning a network schematic and I had problem about the pin function of devices. I want to change the pin function of some IC (example from bidirectional pin to passive pin...). I know that I can do it by change the device properties in library but the issue here is I have alot of devices (and so many pins) in my design and it take long time if I change one by one device pin function.

I tried to change pin function in export file (from Capture/Tools/Export Properties) but it did not work. I don't know how to change alot of pin function in Capture Schematic?

Thank for advance.,

Manhnq 

  • There is no "bulk" way to do this since the consequences may well be undesirable as far as Design Rule Checking is concerned. The Pin Types on parts follow the Pin Types on the device datasheet and IC pins are rarely "passive". As far as the DRC / ERC Matrix checks are concerned, Passive pins are treated as "don't care" and this could lead to the connection of conflicting Pin Types in the design which won't be flagged by the DRC process.

  • Thanks for supporting, oldmouldy!

    If the IC pin function in the datasheet is Ground (GND), and I set the Pin type is Power (I design the library device in the Orcad), then in schematic, I connect this pin to the GND symbol. But the warning still happen when I run the DRC at that pin. It means that the Power pin type is only connected to  VCC or VDD symbol?

    How can I removed the warning like that in my schematic capture?

    Manhnq., 

  • I doubt that is really where the problem is, Power Pins can be connected to Power Symbols, or any name, without DRC. What you probably are seeing is a consequence of "one or more" bidirectional pins being connected to the power net at some pin, or pins, within your schematic. The DRC treats the nets in the desgn as "flattened" for the purposes of checking, so that "any" Bidirectional pin, or pins, connected to a net containing Power pins, will get the Bidirectional to Power DRC reported on all the related Power pins in the schematic.

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