+ Post New Thread
Results 1 to 6 of 6
  1. #1
    Member level 2
    Points: 535, Level: 4

    Join Date
    Sep 2015
    Posts
    42
    Helped
    0 / 0
    Points
    535
    Level
    4

    STA aspect: What will be impact on design if we make to much tight transition time.

    As per STA aspect: What will be the impact on design if we make to much tight transition time. what prime time will do..
    Last edited by mepriyasingh; 30th September 2015 at 12:22.

    •   AltAdvertisment

        
       

  2. #2
    Full Member level 2
    Points: 1,958, Level: 10

    Join Date
    Apr 2012
    Location
    US
    Posts
    131
    Helped
    38 / 38
    Points
    1,958
    Level
    10

    Re: STA aspect: What will be the impact design if we make to much tight transition t

    If you have tight transition time during synthesis, may be fanout will be reduced.


    2 members found this post helpful.

    •   AltAdvertisment

        
       

  3. #3
    Member level 2
    Points: 535, Level: 4

    Join Date
    Sep 2015
    Posts
    42
    Helped
    0 / 0
    Points
    535
    Level
    4

    Re: STA aspect: What will be the impact design if we make to much tight transition t

    Quote Originally Posted by morris_mano View Post
    If you have tight transition time during synthesis, may be fanout will be reduced.

    Thanks
    Can you elaborate this so that i am able to understand better.
    Can any body else please.

    Thanks in Advance



    •   AltAdvertisment

        
       

  4. #4
    Super Moderator
    Points: 29,908, Level: 42
    ads-ee's Avatar
    Join Date
    Sep 2013
    Location
    USA
    Posts
    6,892
    Helped
    1640 / 1640
    Points
    29,908
    Level
    42

    Re: STA aspect: What will be the impact design if we make to much tight transition t

    Quote Originally Posted by mepriyasingh View Post
    Thanks
    Can you elaborate this so that i am able to understand better.
    Can any body else please.

    Thanks in Advance
    fanout = number of loads on a net.

    therefore...
    more loads = slower signal transitions
    less loads = faster signal transitions


    1 members found this post helpful.

  5. #5
    Newbie level 5
    Points: 57, Level: 1

    Join Date
    Oct 2015
    Posts
    9
    Helped
    5 / 5
    Points
    57
    Level
    1

    Re: STA aspect: What will be impact on design if we make to much tight transition tim

    Quote Originally Posted by mepriyasingh View Post
    As per STA aspect: What will be the impact on design if we make to much tight transition time. what prime time will do..
    If you over constrain max_transition for signals,

    1. Buffer counts will increase to meet the constraint
    2. Cells will be faster but delay due to buffers will add up much higher
    3. Congestion due to increased buffer counts
    4. OCV impact will be high if you increase in the number of buffers in clock tree. Increase in #buffers in clock tree --> more OCV --> higher skew. [ OCV: On Chip Variation ]


    2 members found this post helpful.

    •   AltAdvertisment

        
       

  6. #6
    Advanced Member level 3
    Points: 8,180, Level: 21

    Join Date
    Sep 2004
    Location
    Bangalore,India
    Posts
    814
    Helped
    138 / 138
    Points
    8,180
    Level
    21

    Re: STA aspect: What will be the impact design if we make to much tight transition t

    The Power consumption also will go up.



--[[ ]]--