Error checking apparatus

Details Error checking apparatus Error checking apparatus

1987-12-24

1989-12-12

Smith, Jerry

Excavating

371 21, 371 24, G06F 1110

Patent

active

048872687

ABSTRACT:
An error checking apparatus includes first and second switching circuits arranged at input and output ports of a data processing circuit for processing data constituted by a plurality of parallel bits to be transferred through a plurality of transmission lines. The first and second switching circuits are switched so as to bit-shift the input/output connections in a normal mode and a test mode. An error detection control circuit is arranged to decide an error position and a cause of an error in accordance with contents of data obtained at the circuit output port before and after switching.

REFERENCES:
patent: 4477903 (1984-10-01), Schouhamer
patent: 4483001 (1984-11-01), Ryan
patent: 4519079 (1985-05-01), Hamer
patent: 4564941 (1986-01-01), Wooley
patent: 4584682 (1986-04-01), Shah
patent: 4683569 (1987-07-01), Rubin

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