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 how to connect multi clock domians to only one scan chain 

Last post Wed, Jan 9 2013 8:02 AM by bmiller. 1 replies.
Started by MoKhairy 09 Jan 2013 03:38 AM. Topic has 1 replies and 819 views
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  • Wed, Jan 9 2013 3:38 AM

    • MoKhairy
    • Not Ranked
    • Joined on Tue, Jul 10 2012
    • Posts 1
    • Points 20
    how to connect multi clock domians to only one scan chain Reply

     Hi All,

     

    I have a design which contains 3 clock domains when i tried to connect a scan chain the DFT enginr of RTL Compiler auto creat 3 different scan chanis can anyone please help me to enforce the engine to create only one chain i tried this command
    "connect_scan_chains -chains scan_chain0 -pack ${DESIGN}" but it fails and reported the following error

    "Error   : Could not satisfy scan configuration constraints. [DFT-407] [connect_scan_chains]
            : Need additional scan chains.
            : Either define more user-defined scan chains or use the '-auto_create_chains' option with the 'connect_scan_chains' command to automatically create the required number of chains.
    Error: Encountered an error during scan configuration
    Failed on connect_scan_chains"

     

    Thanks in advance 

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  • Wed, Jan 9 2013 8:02 AM

    • bmiller
    • Top 200 Contributor
    • Joined on Tue, Oct 14 2008
    • Ottawa, Ontario
    • Posts 42
    • Points 570
    Re: how to connect multi clock domians to only one scan chain Reply

     All 3 test clocks need to be in the same "domain" in order for them to be allowed on the same scan chain.  RC has the concept of "clocks" and "clock_domains" for both functional and test clocks

     You can either ensure that you define all test clocks to be included in the same domain (use the define_dft test_clock -domain switch), or apply this command to put all test clocks in the same domain:

          set_compatible_test_clocks -all

    Use -h to see the full usage of this command.

    I hope this helps!

     

    • Post Points: 5
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Started by MoKhairy at 09 Jan 2013 03:38 AM. Topic has 1 replies.