A Discrete Event System Approach to Online Testing of Speed Independent Circuits | Zendy

Pradeep Kumar Biswal | Zendy; Kush Mishra | Zendy; Santosh Biswas | Zendy; Hemangee K. Kapoor | Zendy

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A Discrete Event System Approach to Online Testing of Speed Independent Circuits

Author(s) -

Pradeep Kumar Biswal,

Kush Mishra,

Santosh Biswas,

Hemangee K. Kapoor

Publication year - 2015

Publication title -

vlsi design

Language(s) - English

Resource type - Journals

eISSN - 1065-514X

pISSN - 1026-7123

DOI - 10.1155/2015/651785

Subject(s) - semaphore , correctness , asynchronous communication , computer science , testability , event (particle physics) , overhead (engineering) , computer engineering , electronic circuit , asynchronous circuit , fault (geology) , detector , fault coverage , state (computer science) , multiplexer , embedded system , reliability engineering , algorithm , multiplexing , engineering , clock signal , electrical engineering , programming language , computer network , telecommunications , physics , quantum mechanics , seismology , synchronous circuit , geology

With the increase in soft failures in deep submicron ICs, online testing is becoming an integral part of design for testability. Some techniques for online testing of asynchronous circuits are proposed in the literature, which involves development of a checker that verifies the correctness of the protocol. This checker involves Mutex blocks making its area overhead quite high. In this paper, we have adapted the Theory of Fault Detection and Diagnosis available in the literature on Discrete Event Systems to online testing of speed independent asynchronous circuits. The scheme involves development of a state based model of the circuit, under normal and various stuck-at fault conditions, and finally designing state estimators termed as detectors. The detectors monitor the circuit online and determine whether it is functioning in normal/failure mode. The main advantages are nonintrusiveness and low area overheads compared to similar schemes reported in the literature

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