Semiconductor integrated circuit device equipped with scan-pass

Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor

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371 223, G01R 3128, G01R 1512

Patent

active

049163884

ABSTRACT:
A semiconductor integrated circuit device is disclosed, which includes a test circuit for facilitating A.C. characteristic test thereof. This test circuit includes a delay circuit, a first register for temporarily storing test data to be supplied to the delay circuit and a second register for temporarily storing data derived from the delay circuit. The delay circuit has a delay time approximately equal to a data propagation delay time on a critical path formed in the integrated circuit device. The device also includes a scan pass type test circuit for a function test thereof. The scan-in terminal is used to supply the test data to the first register and the scan-out terminal is used to receive data from the second register.

REFERENCES:
patent: 4602210 (1986-07-01), Fasang et al.
patent: 4701922 (1987-10-01), Kuboki et al.
patent: 4780666 (1988-10-01), Sakashita et al.
patent: 4796095 (1989-01-01), Shimada

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