Error SUM(0) pin disconnected

[Abhishek Agrawal]

Attaching my .qll file for carry save adder circuit. getting the above error.

• This topic was modified 4 years, 7 months ago by Abhishek Agrawal.
• This topic was modified 4 years, 7 months ago by Fabrizio.

Attachments:

1. FullAdder_pnmll.qll
2. CSA.qll

[Abhishek Agrawal]

When I am inserting my full adder as a black box, I am getting the error as sum pin disconnected. can you please solve my query. The qll file is in above drive link.

[Fabrizio]

Hello,

the problem is hidden inside your full adder. You must bring your pins (input/output) at the bounding box edge.
In your full adder, the input pins are included in the bounding box making it not possible a direct connecting within the same layer.
Try using the attached one. Remember to replace all the black boxes within the CSA with the new one.

Best,

FR

Attachments:

1. FullAdder_pnmll-1.qll

[Abhishek Agrawal]

Hello Sir,

Thanks for your help. My problem is solved.

[Author]

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