Serial scan patterns are failing

praveenb824 · Aug 21, 2019

Hi All,

I am using cadence ncsim tool for gate level simulation. I am facing below issue.

issue:
My compression scan patterns are passing in parallel simulation But failing in serial simulation.

And i mm using pipeline in my design. And the pipeline depth was 1.

What might be the issue ..?

Could anyone suggest me for debug.

TonyLS · Aug 21, 2019

praveenb824 said:
Hi All,

I am using cadence ncsim tool for gate level simulation. I am facing below issue.

issue:
My compression scan patterns are passing in parallel simulation But failing in serial simulation.

And i mm using pipeline in my design. And the pipeline depth was 1.

What might be the issue ..?

Could anyone suggest me for debug.

Seems to be something wrong when scanning in data during scan in shift mode of the serial patterns. Either incorrect scan stitching, scan-clock, or most likely hold time issues during scan shift. Look for FF timing warnings/messages within the serial simulation log file. The above issues are not a problem with parallel patterns since all scan registers are loaded within one clock cycle, essentially bypassing scan in shift mode

Serial scan patterns are failing

praveenb824

Newbie level 1

TonyLS

Member level 3

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Serial scan patterns are failing

praveenb824

Newbie level 1

TonyLS

Member level 3

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