I have created many parts in OrCAD which have 'NC' pins - or other pins with similar names: IO,.. - when I run DRC or create netlist I see below error messages in the DRC report file or session log:
#2 ERROR(ORCAP-36041): Duplicate Pin Name "NC" found on Package xc6slx45fgg484F , U22F Pin Number P15: SCHEMATIC1, 10-FPGA Power (0.00, 0.00). Please renumber one of these.#3 ERROR(ORCAP-36041): Duplicate Pin Name "NC" found on Package xc6slx45fgg484F , U22F Pin Number D12: SCHEMATIC1, 10-FPGA Power (0.00, 0.00). Please renumber one of these.#4 ERROR(ORCAP-36041): Duplicate Pin Name "NC" found on Package xc6slx45fgg484F , U22F Pin Number E10: SCHEMATIC1, 10-FPGA Power (0.00, 0.00). Please renumber one of these.
My device has really lots of NC pins: accordingly, I have made my schematic parts. However, I see lots of errors when running DRC or creating Netlist!.
I should add that 'NC' pins are defined PASSIVE.
I appreciate any help on this issue.
Pin names just like pin numbers should be unique.
Rename those pins to NC1, NC2, NC3 etc
OrCAD and Concept both allow the property "NC" to be added to a symbol with a pin list. This allows multiple NC pins to be accounted for without having to add visible NC pins (NC1, NC2, etc...).
To do this simply add "NC" to the part and list the pins with comma in between. Then you can display the property on the schematic.
Otherwise you will have to add a unique pin instance to the symbol. Using a spreadsheet to generate the pins with unique numbers is the simplest method. Then copy,paste to a symbol section.
In reply to redwire:
Thank you. Would you please tell me where I can add NC and that list?
In reply to Hossein1357:
Is there anybody who can give a clear guide on this issue?!.. I am very short of time.
Select the schematic part and use right click - edit properties then click on New Property and set the property name to NC and then value to a comma seperated list of the NC pins (like 1,17,28,40).
In reply to steve:
Thank you both (Steve & redwire) very much for your answer. I could now easily add NC pins to my part without giving various names to them.
Have a nice day,