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Moving Pins on Microprocessor

autodeskguest

Hello,

 

I have created a 'generic' symbol for a microcontroller in a library.  The

symbol has all of the port pins grouped logically, power and ground

connections, crystal... etc

 

When I bring the part into a design, I like to move the pins around the

microcontroller to match up with the interface circuitry easily.

 

Is there a way to move the pins on the 'local copy' of the symbol, or must I

edit the library copy and update the symbol in the schematic?

 

Thanks,

Greg

 

 

 

Parents

  • gregrycm schrieb:

     

    I have created a 'generic' symbol for a microcontroller in a library.  The

    symbol has all of the port pins grouped logically, power and ground

    connections, crystal... etc

     

    When I bring the part into a design, I like to move the pins around the

    microcontroller to match up with the interface circuitry easily.

     

    Is there a way to move the pins on the 'local copy' of the symbol, or must I

    edit the library copy and update the symbol in the schematic?

     

    If you really want different appearance of the symbols, you need to

    create different symbols (and devices!) in the library.

     

    Since you would end up with a unmaintainable library mess, I strongly

    suggest to use "fixed" symbols and draw the schematics accordingly.

     

    I most often draw only net stubs (with labels) at the controller, and

    reuse these nets elsewhere in the circuit. This has the advantage that

    it's easy to swap port pins (where allowed) to match the board layout

    during routing. Using a bus might also help in several cases.

     

    Tilmann

     

Reply

  • gregrycm schrieb:

     

    I have created a 'generic' symbol for a microcontroller in a library.  The

    symbol has all of the port pins grouped logically, power and ground

    connections, crystal... etc

     

    When I bring the part into a design, I like to move the pins around the

    microcontroller to match up with the interface circuitry easily.

     

    Is there a way to move the pins on the 'local copy' of the symbol, or must I

    edit the library copy and update the symbol in the schematic?

     

    If you really want different appearance of the symbols, you need to

    create different symbols (and devices!) in the library.

     

    Since you would end up with a unmaintainable library mess, I strongly

    suggest to use "fixed" symbols and draw the schematics accordingly.

     

    I most often draw only net stubs (with labels) at the controller, and

    reuse these nets elsewhere in the circuit. This has the advantage that

    it's easy to swap port pins (where allowed) to match the board layout

    during routing. Using a bus might also help in several cases.

     

    Tilmann

     

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