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Edit and Show reference designator/pin numbers in Cadence Design Entry

EdwardHU

In the transition to use Cadence PCB tools. Have used Altium/PCAD a lot in my previous careers.

Unfamiliar with the way that Cadence tool processes. After I add a component to the schematics entry tool (concept), why I don't see the reference designator and the pin numbers of the component? I tried all menu and have not found a way to do it.

Regards,

Ed

 

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  • Jerry GenPart
    Hi Ed!

    The process is slightly different in the schematic entry tool (ConceptHDL – now known as Design Entry HDL – DEHDL) compared to other schematic tools.

    You’re essentially adding the logic (adding parts), establishing the connectivity (wiring pins on parts), and providing constraints (via the Constraint Manager or object attributes) when constructing the schematic. Rather than adding the reference designators and pin numbers to parts (as you place them), you simply save the design, then run Export Physical. You don’t need to pass the netlist to the PCB Board at this point, just run Export Physical (with the option to backannotate the schematic). When this is done, all the parts will now have the reference designators and pin numbers displayed.

    There are times, of course, when you’d like to “fix” these values so that the PCB Designer cannot swap ref des values or pin numbers. To do this, simply use the Attribute command in DEHDL, and add the property LOCATION with a value (e.g. LOCATION=U47). Also, to fix a pin number (typical for a connector), use the DEHDL Section command and click on a pin stub. For example – SECTION 23 (and then click on a pin stub of a part) will place pin# 23 on that pin.

    Hope this helps!

     

    Jerry
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  • Jerry GenPart
    Hi Ed!

    The process is slightly different in the schematic entry tool (ConceptHDL – now known as Design Entry HDL – DEHDL) compared to other schematic tools.

    You’re essentially adding the logic (adding parts), establishing the connectivity (wiring pins on parts), and providing constraints (via the Constraint Manager or object attributes) when constructing the schematic. Rather than adding the reference designators and pin numbers to parts (as you place them), you simply save the design, then run Export Physical. You don’t need to pass the netlist to the PCB Board at this point, just run Export Physical (with the option to backannotate the schematic). When this is done, all the parts will now have the reference designators and pin numbers displayed.

    There are times, of course, when you’d like to “fix” these values so that the PCB Designer cannot swap ref des values or pin numbers. To do this, simply use the Attribute command in DEHDL, and add the property LOCATION with a value (e.g. LOCATION=U47). Also, to fix a pin number (typical for a connector), use the DEHDL Section command and click on a pin stub. For example – SECTION 23 (and then click on a pin stub of a part) will place pin# 23 on that pin.

    Hope this helps!

     

    Jerry
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