Data processor including testing structure for a barrel shifter

Details Data processor including testing structure for a barrel shifter Data processor including testing structure for a barrel shifter

1988-08-26

1990-10-09

Fleming, Michael R.

Excavating

371 212, 365201, G06F 1116

Patent

active

049625004

ABSTRACT:
A data processor includes a barrel shifter receiving input data at input terminals thereof and producing shifted data at output terminals thereof in response to shift control data, the shifted data being temporarily stored in a storage circuit which, in turn, returns the data stored therein to the output terminals of the barrel shifter in response to a test-enable signal. Feed-back data derived from the input terminals of the barrel shifter by returning the stored data through the barrel shifter is then compared with the input data to produce a comparison output representing whether or not both data are the same.

REFERENCES:
patent: 3903511 (1975-09-01), Lighthall
patent: 4313199 (1982-01-01), Aichelmann
patent: 4363124 (1982-12-01), Aichelmann
patent: 4669061 (1987-05-01), Bhavsar

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