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10th Asian Test Symposium (ATS'01)
A Unified Scheme for Designing Testable State Machines
Kyoto, Japan
November 19-November 21
ISBN: 0-7695-1378-6
P. K. Lala, University of Arkansas
A. Walker, North Carolina A&T State University
An approach for designing state machines that have built-in on-line and off-line testability is proposed. The next state logic is designed using transmission gates and tri-state buffers only. The resulting machines have scan_in/scan_out capability that allows off-line testing of the next state logic. The on-line testing capability for erroneous state transitions is achieved by EX-ORing the outputs of two registers that store the current and the next state of a machine, and checking for even parity at the outputs of the EX-OR gates.
Citation:
P. K. Lala, A. Walker, "A Unified Scheme for Designing Testable State Machines," ats, pp.273, 10th Asian Test Symposium (ATS'01), 2001
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