+ Post New Thread
Results 1 to 4 of 4
  1. #1
    Newbie level 3
    Points: 714, Level: 5

    Join Date
    Jan 2009
    Posts
    3
    Helped
    0 / 0
    Points
    714
    Level
    5

    dft lssd

    Hi friends,
    I got the S1-error after when i run post-DFT drc. I wrote out my net list then i found that my

    SN pin of latch which is connected to permanent-1 in functional mode is now connected to

    SCLK (Scan Slave Clock). Can anyone help me in debugging this. The scan type is LSSD.

    Thanks in advance

    •   AltAdvertisement

        
       

  2. #2
    Member level 2
    Points: 3,715, Level: 14
    wizard's Avatar
    Join Date
    Mar 2002
    Location
    China Mainland
    Posts
    51
    Helped
    3 / 3
    Points
    3,715
    Level
    14

    Re: DFT with LSSD cells

    You are using DC to do this?

    What is S1? Sorry I don't have time to look up that in manual.

    Because most design are DFF based, I doubt the tool's matrurity on LSSD if you have set configurations correctly according to manual.


    Quote Originally Posted by amar.reddy4020
    Hi friends,
    I got the S1-error after when i run post-DFT drc. I wrote out my net list then i found that my

    SN pin of latch which is connected to permanent-1 in functional mode is now connected to

    SCLK (Scan Slave Clock). Can anyone help me in debugging this. The scan type is LSSD.

    Thanks in advance



    •   AltAdvertisement

        
       

  3. #3
    Newbie level 3
    Points: 714, Level: 5

    Join Date
    Jan 2009
    Posts
    3
    Helped
    0 / 0
    Points
    714
    Level
    5

    Re: DFT with LSSD cells

    S1: is scan chain blockage after (cell number is scan chain ) cells.

    I'm using dc to do this and my protocol is perfect. I hope there is problem with LSSD State table in the Library.



    •   AltAdvertisement

        
       

  4. #4
    Full Member level 2
    Points: 2,558, Level: 11
    Achievements:
    7 years registered

    Join Date
    Oct 2008
    Location
    Hyderabad
    Posts
    123
    Helped
    41 / 41
    Points
    2,558
    Level
    11

    DFT with LSSD cells

    checkout this

    http://www.asic-dft.com/Level%20Sensitive%20Scan%20Design%20(LSSD)%20Style .html



--[[ ]]--