Semiconductor integrated circuit

Details Semiconductor integrated circuit Semiconductor integrated circuit

2009-01-15

2010-12-28

Cho, James H. (Department: 2819)

Electronic digital logic circuitry

With test facilitating feature

C714S724000, C714S729000, C714S734000, C365S201000

Reexamination Certificate

active

07859293

ABSTRACT:
A semiconductor integrated circuit includes a digital circuit and a first-stage register circuit provided in a stage followed by the digital circuit. The digital circuit includes a logic circuit and a register circuit configured to temporarily retain a logic output from the logic circuit. The first-stage register circuit has a function as an alternative configured to test at least one register circuit and a function as an interface which supplies input data from an external input terminal to the digital circuit. The first-stage register circuit retains the input data from the external input terminal in synchronization with a clock signal, supplies the retained data to the digital circuit at the time of system operation, and outputs the retained data from an external output terminal connected to a dedicated output terminal or the digital circuit at the time of testing.

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