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Issue trying to add route / via

mvonahnen

 I am trying to fan out from a BGA component.  Neither the "Create Fanout" or "Fanout by Pick" will fan out all the pins.  So I am trying to do it manually.  But when I try to add a via, it always defaults to <VIA> instead of the via I have selected for all of the signal nets.  I can change this on the Options tab, but I have to change it every time I add one.  Is there a way of changing the default for <VIA> also?  If not this is a serious limitation.

 Also another comment, the editor gets into modes where it seems to change layers on its own or assumes that I want to route, even though I have completed the active command.  Is there a way of setting the software up not to do this?

  • mvonahnen

     Another problem, I noticed if there are two pins on the same net close together, when I try to route out to a via, it automatically connects these.  Is there any way to set up this software to be "stupid" and just do what I tell it to do instead of inferring routes, etc.  It is very annoying.

  • Randy R

    For the two pin routing issue here are some things that could help:

    1) Use a finer grid

    2) After starting your trace with the first pin you can either

        a) Turn off "Snap to connect point" on the Options tab

        b) Turn off pins on the Find tab.

  • mvonahnen

     Any way of doing this by default?  I keep being told to look at the tutorials, but none of this shows up in the routing tutorial.  I guess I am just supposed to know this stuff.

  • mvonahnen

     Anothr problem:  Two of the pins I have are differential pairs.  It forces me to fan these out together, but I need to take them in different directions.  I did not see anywhere on the options tab how to not do these together.

  • Randy R

    Tutorials and User Guides are very helpful in learning:

    On diff pairs; this (and much more) can be found in the InstallDirectory/doc/algroroute/ folder.  Look up the Single Trace Mode (right-click when routing).

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