Motorola Corporation

Gregory Dean Young

Alfred Larry Crouch

Jeffrey Freeman

Bahram Pouya

A configurable test access mechanism has a sliced input wrapper, output wrapper and scan configuration wrapper coupled to a circuit under test. The input wrapper efficiently adds a PRPG (pseudo-random pattern generator) function to a scan test structure without impacting speed and power requirements. The output wrapper efficiently adds a MISR (multiple input signature register) functionality for additional test purposes to implement a built-in self-test (BIST) apparatus. Use of existing scan structures to implement the PRPG and MISR functions provides significant savings of circuitry. Variability of test polynomials is easily user programmed.

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Georgetown, TX, United States of America

Gregory Dean Young