Texas Instruments Corporation

Srujan Kumar Nakidi

Rubin Ajit Parekhji

Alan David Hales

Srivaths Ravi

Rajesh Kumar Tiwari

A test controller implemented in an integrated circuit (IC) with partitioned scan chains provides enhanced control in performing scan tests. According to an aspect, a test controller can selectively control scan-in, scan-out and capture phases of scan tests for different scan chains of the IC to be independent. The number of pins required to interface the test controller with an external tester is less than the number of partitions that the test controller can support. According to another aspect, an IC includes a register corresponding to each partition to support transition fault (or LOS) testing. According to another aspect, an IC with partitioned scan chains includes serial to parallel and parallel to serial converters, thereby minimizing the external pins required to support scan tests.

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Adilabad, India

Srujan Kumar Nakidi