Integrated circuit device

Details Integrated circuit device Integrated circuit device

1985-08-26

1987-10-20

Atkinson, Charles E.

Excavating

324 73R, 371 15, G01R 3128

Patent

active

047019220

ABSTRACT:
An integrated circuit device comprises combinational circuits and sequential circuits. Each of the sequential circuits is provided with a (common) input control signal terminal for controlling the entry of main input terminal signals into the sequential circuit, a test data input/output terminal, a read/write signal terminal for controlling the transfer of the test data, and a latch circuit. The integrated circuit device is partitioned into sequential circuit groups, and combinational circuit groups used as partitioning test units, the main input/output terminal groups of which are connected with the sequential circuit groups through wiring layers. Test data are written into and read out from the sequential circuit groups under control of read/write signal lines through bus lines dedicated to testing. Thus, a higher fault-coverage ratio can be easily obtained with a smaller number of steps and a small test circuit area.

REFERENCES:
patent: 4298980 (1981-11-01), Hajdu et al.
patent: 4476431 (1984-10-01), Blum
patent: 4477902 (1984-10-01), Puri et al.
patent: 4493077 (1985-01-01), Agrawal et al.
patent: 4553236 (1985-11-01), Zasio et al.
patent: 4588944 (1986-05-01), Rothenberger
patent: 4597042 (1986-06-01), d'Angeac et al.

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