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 Sectioning in DE HDL 

Last post Wed, Sep 4 2013 3:10 PM by admin. 4 replies.
Started by admin 01 Sep 2013 09:51 PM. Topic has 4 replies and 424 views
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  • Sun, Sep 1 2013 9:51 PM

    • admin
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    Sectioning in DE HDL Reply

    Hi, a newbie 's question. What does sectioning do in DE HDL?

    So far I only learnt that sectioning a part can display the pin numbers of all the pins of that particular part, and of course a psm must be mapped to that part symbol initially.

    Thanks in advance. 

    • Post Points: 20
  • Mon, Sep 2 2013 7:19 AM

    • Jerry GenPart
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    Re: Sectioning in DE HDL Reply

    You're correct, the DEHDL Section command will add the part's pin numbers to its pin stubs. However, the preferred method of seeing the pin numbers is to run Export Physical and insure the back annotation option is enabled. This will add pin numbers to all the parts in the entire design.

     Using the Section command, while it does display pin numbers, will "fix" those pin numbers so that the PCB designer will not be able to swap gates within a footprint. Essentially, you're conveying that you don't want those pins to be swapped. This is why you should only use the Section command if you want to prevent pin swapping. The PCB designer does have an override capability, but it's not often used.

     

    Regards,

    Jerry
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  • Wed, Sep 4 2013 2:53 PM

    • admin
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    Re: Sectioning in DE HDL Reply

    Hi Jerry,

    Thanks for the reply. Just for a better understanding,

    say I have two pins U1.1 and U1.2 are supposed to be connected to the two input pins of a NOR gate: U2.1 and U2.2. (e.g U1.1 to U2.1 and U1.2 to U2.2),

    of course it would also be right if U1.1 is connected to U2.2 and U1.2 to U2.1. (U1.1 and U1.2 swap)

    by sectioning U1 -> "fixing" U1,  U1.1 will be mapped to U2.1 and U1.2 to U2.2 when the schematic is exported to PCB Editor (re-packaged).

    am I right to interprete like this? 

     

     

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  • Wed, Sep 4 2013 3:07 PM

    • Jerry GenPart
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    Re: Sectioning in DE HDL Reply
    You can make the wire connections to the pins on each part however you want. All the Section command does is to prevent the swapping of pin numbers. 
    Regards,

    Jerry
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  • Wed, Sep 4 2013 3:10 PM

    • admin
    • Top 25 Contributor
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    Re: Sectioning in DE HDL Reply
    Hi Jerry, I got it. Thanks again for the help.
    • Post Points: 5
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Started by admin at 01 Sep 2013 09:51 PM. Topic has 4 replies.