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Unconstrained signal arriving at an end point

Hi All

While executing checkTinming command i am seeing Unconstrained signal arriving at an end point warnings how can i rectifiy this warnings. What does Unconstrained signal ment for? What type of constraints we need to define to rectify these warnings?

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Ganga111AtFPS over 13 years ago

Hi vicky,
Unconstrained signal means you might not have defined set_input
_delay and set_output_delay in your constraint file check your .sdc file once.
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SrikanthReddy over 5 years ago in reply to Ganga111AtFPS

Hi all,

I have applied input and output delay constraints but still some ports are showing under unconstrained endpoints. I want to know all the reasons for ports or pins to be unconstrained endpoint. Please help me regarding this.
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SrikanthReddy over 5 years ago in reply to Ganga111AtFPS

Hi all,

I have applied input and output delay constraints but still some ports are showing under unconstrained endpoints. I want to know all the reasons for ports or pins to be unconstrained endpoint. Please help me regarding this.
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Shweta over 5 years ago in reply to SrikanthReddy

Hello Srikanth,

When you have the design up, please report the unconstraints endpoints with following command.

report_timing -to <endpoint> -path_exceptions all -unconstrained -view <viewName>

This should give the answer.
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abi7ash over 5 years ago in reply to Shweta

Hi Everyone,

I am also facing the same issue, even after reporting timing using below command

Shweta said:
report_timing -to <endpoint> -path_exceptions all -unconstrained -view <viewName>

I am getting unconstrained reasons as below, and not getting how to fix it. could you please help me to fix this issue.

All the outgoing arcs attached to the point hwscon/dfe_a1_i1_c1_inc_add_28_34_
18_g402/A1N are inactive
There is also no capturing arc or constraint applicable to this end point
The above makes it the end point of the unconstrained path

Thanks in advance,

Abhilash.
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