Fault detection and bypass in a sequence information signal proc

Details Fault detection and bypass in a sequence information signal proc Fault detection and bypass in a sequence information signal proc

1990-10-02

1992-12-01

Canney, Vincent P.

Excavating

371 223, G01R 3128

Patent

active

051684993

ABSTRACT:
The invention comprises a plurality of scan registers, each such register respectively associated with a processor element; an on-chip comparator, encoder and fault bypass register. Each scan register generates a unitary signal the logic state of which depends on the correctness of the input from the previous processor in the systolic array. These unitary signals are input to a common comparator which generates an output indicating whether or not an error has occurred. These unitary signals are also input to an encoder which identifies the location of any fault detected so that an appropriate multiplexer can be switched to bypass the faulty processor element. Input scan data can be readily programmed to fully exercise all of the processor elements so that no fault can remain undetected.

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