Sorry, I do not intend to get/try/benchmark logic-BIST tools.
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I'm just interesting about the level of current technology >>>
in the area of logic-BIST !
If any one has the experience, please share it.
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For example,
which kind of core ?
the size of the block ?
the BIST controller gate count ?
the length of test cycle ?
*** Most imporant of all *** the test coverage ???
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LogicVision has developed a new Logic Bist tool & analysis tool, which
they claimed can replace the old and hard-debugging scan DFT. they also
claimed the freq of test clk can be as high as working freq.
BIST applies random vectors to your design so its generally about 85% or so. Some vendors add flip-flops to your design to increase test coverage. They look at the untested faults left in your design and add the flip-flops where they provide the most coverage. The problem is that you can add a lot of FFs to your design.
The tests can be applied at a high frequency. However unless you can shift your scan chain at that frequency your tests will not run significantly faster.