+ Post New Thread
Results 1 to 2 of 2
  1. #1
    Newbie level 1
    Points: 15, Level: 1

    Join Date
    Aug 2019
    Posts
    1
    Helped
    0 / 0
    Points
    15
    Level
    1

    Serial scan patterns are failing

    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.

    •   AltAdvertisement

        
       

  2. #2
    Member level 2
    Points: 2,135, Level: 10
    Achievements:
    7 years registered

    Join Date
    Jan 2009
    Location
    Boston, MA
    Posts
    48
    Helped
    2 / 2
    Points
    2,135
    Level
    10

    Re: Serial scan patterns are failing

    Quote Originally Posted by praveenb824 View Post
    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



--[[ ]]--