Abstract
We propose an approach for built-in fault diagnosis of synchronous sequential circuits. The proposed approach distinguishes faults based on their detection by modified versions of a fault detection test sequence generated on-chip. The modified versions are defined by one-bit-wide auxiliary sequences, also generated on-chip. The auxiliary sequences indicate which test vectors of the fault detection test sequence need to be applied to the circuit. Experimental results presented indicate that the proposed on-chip test generation method is effective in achieving high levels of diagnostic-resolution.
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