Patent ID: 7254760

Claim:
A method for providing scan patterns to an electronic device having built-in self-test (BIST) hardware, the BIST hardware having a production test mode and a diagnostic test mode, and the electronic device outputting one or more response signatures in the production test mode and outputting raw response data in the diagnostic test mode, the method comprising: in production test mode, using automated test equipment (ATE) to i) provide a first series of scan test patterns to said BIST hardware, and ii) capture and compare response signatures to expected response signatures, to identify a number of failing scan test patterns; using the ATE to identify a number of unique labels associated with said failing scan test patterns; and in diagnostic test mode, using the ATE to i) provide a second series of scan test patterns to said BIST hardware, the scan test patterns in said second series corresponding to said identified labels, and ii) capture raw response data.