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how to connect multi clock domians to only one scan chain

MoKhairy

 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 

Parents

  •  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!

     

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!

     

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