Abstract: Techniques are disclosed relating to testing logic in integrated circuits using an external test tool. In one embodiment, an integrated circuit includes a logic unit and a self-test unit. The self-test unit is configured to receive an expected signature value that corresponds to an expected output value of the logic unit, and to compare the expected signature value and an actual signature value generated from an actual output value from the logic unit. In some embodiments, the integrated circuit further includes a pseudo-random pattern generator configured to provide an input value to the logic unit, and the logic unit is configured to generate the actual output value based on the provided input value. In some embodiments, the integrated circuit further includes a multiple-input signature register (MISR) configured to generate the actual signature value based on the actual output value and a seed value.

Abstract: Implementations of the present principles are directed to test output compaction arrangements and a methods of generating control patterns for unknown blocking. The specified bits in the control patterns, which when using linear feedback shift register (LFSR) reseeding determines control data volume and LFSR size, are preferably organized in a manner so as to balance the number of specified bits in the control patterns across test patterns.

Abstract: A test system for a circuit board , wherein the circuit board has a plurality of cores such that at least one of the plurality of cores is adapted to use a test protocol independent of a communication fabric used in the circuit board. A system-on-chip (SOC) with an embedded test protocol architecture, the SOC comprising at least one embedded core, a communication fabric that connects at least one embedded core, at least one test server; and at least one test client connected to said at least one embedded core and connected to the communication fabric.

Abstract: A test system for a circuit board, wherein said circuit board has a plurality of cores such that at least one of said plurality of cores is adapted to use a test protocol independent of a communication fabric used in the circuit board.