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Recent content by chis4yu

  1. C

    How to describe in DFT compilto use external reference clock to pll as a scan clock?

    Hi, I have a pll which can bypass the pllout with input reference clock. So when I force bypass=1, then the input reference clock is output to the pllout. How to describe for DFT compiler this special connection and treat the reference clock as a scan clock ? set_dft_signal -view existing_dft...
  2. C

    Scan chain simulations with SDF questions

    I ran tetramax atpg on my netlist with scan insertion. This generates the patterns to exercise possible faults. Now I ran write_testbench -input xyz.spf -output xyz_tb Supposedly this step creates the testbench and data input with expected output file xyz_tb.v and xyz_tb.dat and runs...
  3. C

    DFT compiler set_autofix

    Hi, I'm setting certain elements to NOT be scanned. But looks like set_dft_configuration overrides this. 1) set_dft_configuration (acts like autofix) Need someone to confirm. set_scan_element false { module1 module2 } set_dft_configuration -fix clock_enable set_dft_configuration -fix reset...
  4. C

    DFT compiler commands

    Hi, I'm a little confused by DFT compiler and usage. I understand that the normal clock is defined as the ScanClock with existing_dft but I'm adding a bypass MUX in RTL. Seems like the clock used for scan chain insertion ALWAYS uses functional clk name. In this case : clk. Seems like the...
  5. C

    Tetramax custom patterns

    Hi, I have a custom block that needs special scan test pattern. What are the tetramax commands to read in user created test patterns for a particular scan chain and run atpg to generate and report faults ?
  6. C

    DFT compiler with multimodes

    Hi, I have a dft setup where there are 8 blocks of logic to be scanned. I was thinking of using define_test_mode A0 -usage -scan -encoding {TEST[3] 0 TEST[2] 0 TEST[1] 0 TEST[0] 1} . . . and create the 8 test modes. These 8 blocks will have one common scan input and one common scan output...
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