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dft settings during DFT scan insertion

tanyacool

 hi,

 i am totally new to DFT and using RC tool for scan insertion. Some attributes settings needs to be done during synthesis.

can anyone please list them out for scan insertion settings.

 

thanks 

tanya

Parents

  •  Hi Tanyacool,

     I am not sure I fully understand your requirements but let me take a stab.

    By default,  RC maps seqs to scan equivalent provided they pass DFT rules (TDRCs)

    If you do not have control over RTL or do not want to address TDRCs in RTL you can

     (1) proceed with whatever % of TDRC-ready seqs you get

    (2) use the following attribute set to force_all resulting in all seqs with scan equivalent replaced

    attribute name: dft_scan_map_mode
              category: dft (controls design for test)
           object type: design
           access type: read-write
             data type: DftScanMapModeEnum
         default value: tdrc_pass
                  help: DFT scan conversion mode {tdrc_pass | preserve | force_all}.
     

    (3) use the command fix_dft_violations to address TDRCs 

     Note that TDRC status is tagged upon runing the command check_dft_rules

    Scan replacement happens during incremental synthesis

    scan connection will not happen unless your seqs have been scan replaced

    gh-

Reply

  •  Hi Tanyacool,

     I am not sure I fully understand your requirements but let me take a stab.

    By default,  RC maps seqs to scan equivalent provided they pass DFT rules (TDRCs)

    If you do not have control over RTL or do not want to address TDRCs in RTL you can

     (1) proceed with whatever % of TDRC-ready seqs you get

    (2) use the following attribute set to force_all resulting in all seqs with scan equivalent replaced

    attribute name: dft_scan_map_mode
              category: dft (controls design for test)
           object type: design
           access type: read-write
             data type: DftScanMapModeEnum
         default value: tdrc_pass
                  help: DFT scan conversion mode {tdrc_pass | preserve | force_all}.
     

    (3) use the command fix_dft_violations to address TDRCs 

     Note that TDRC status is tagged upon runing the command check_dft_rules

    Scan replacement happens during incremental synthesis

    scan connection will not happen unless your seqs have been scan replaced

    gh-

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