This article describes a novel approach to fault diagnosis suitable for at-speed testing of board-level interconnect faults. The approach is based on a new parallel test pattern generator and a specific fault detecting sequence. The test sequence has tree major advantages. At first, it detects both static and dynamic faults upon interconnects. Secondly, it allows precise on-chip at-speed fault diagnosis of interconnect faults. Third, the hardware implementation of both the test generator and

more »

... response analyzer is very efficient in terms of silicon area.