Logic built in self-test diagnostic method

A system for diagnosing failures in a device comprising:

• means for applying a sequence of test inputs to the device;
• means for collecting actual signatures corresponding to the sequence of test inputs;
• means for dividing the actual signatures into one or more intervals;
• means for finding a failing interval from the intervals;
• means for finding a failing signature in the failing interval;
• and
• means for deriving an expected signature from the failing signature.

An information handling system for diagnosing faults in a device comprising:

• one or more processors;
• memory;
• a bus for coupling said processor to said memory;
• means for applying a sequence of test inputs to the device;
• means for collecting actual signatures corresponding to the sequence of test inputs;
• means for dividing the actual signatures into one or more intervals;
• means for finding a failing interval from the intervals;
• means for finding a failing signature in the failing interval;
• and
• means for deriving an expected signature from the failing signature.

A computer readable medium comprising:

• means for applying a sequence of test inputs to the device;
• means for collecting actual signatures corresponding to the sequence of test inputs;
• means for dividing the actual signatures into one or more intervals;
• means for finding a failing interval from the intervals;
• means for finding a failing signature in the failing interval;
• and
• means for deriving an expected signature from the failing signature.