Macro cell signal selector and semiconductor integrated circuit

Details Macro cell signal selector and semiconductor integrated circuit Macro cell signal selector and semiconductor integrated circuit

1998-07-06

2000-10-31

Tokar, Michael

Electronic digital logic circuitry

Multifunctional or programmable

Array

326 16, 714725, H03K 19177, G01R 3128

Patent

active

061408409

ABSTRACT:
A macro cell, a signal selector and a semiconductor integrated circuit including these parts. In a large scale integrated circuit including a built-in macro cell with two-way terminals, a testing of a single macro cell can be readily carried out in a production testing, and a signal communication between the macro cell and an external terminal can be executed in a normal operation. A designing of the large scale integrated circuit can be performed in a simple, flexible and systematic manner. A macro cell includes a two-way test exclusive terminal, a two-way user exclusive terminal, and a controller for actuating or unactuating these terminals in the testing and the normal operation. A signal selector includes two-way terminal to be connected to the test exclusive terminal of the macro cell, a macro cell connection exclusive terminal, and a controller to connect the these terminals to external terminals. The connection between the macro cell terminals and the signal selector terminals is controlled by a tmode signal.

REFERENCES:
patent: 4857773 (1989-08-01), Takata et al.
patent: 5331571 (1994-07-01), Aronoff et al.
patent: 5717699 (1998-02-01), Haag et al.
patent: 5767701 (1998-06-01), Choy et al.

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