Circuit for generating a mode control signal

Details Circuit for generating a mode control signal Circuit for generating a mode control signal

1993-07-29

1994-11-08

Beausoliel, Jr., Robert W.

Excavating

371 226, 371 223, 324 731, 3241581, H04B 1700, G01R 1512

Patent

active

053633830

ABSTRACT:
A mode control circuit is disclosed which generates a mode control signal in response to an illegal state detected as a combination of inputs and outputs. An illegal state is forced by the application of a fixed voltage to an output pin. The mode control signal is used to switch input-output signals of a megacell internal to an application specific integrated circuit to the output pins of the package so that testing of the megacell is facilitated.

REFERENCES:
patent: 4002974 (1977-01-01), Thomas
patent: 4703483 (1987-10-01), Enomoto et al.
patent: 4742486 (1988-05-01), Takemae et al.
patent: 4857774 (1989-08-01), El-Ayat et al.
patent: 5005173 (1991-04-01), Martin
patent: 5012185 (1991-04-01), Ohfuji
patent: 5036272 (1991-07-01), Cho et al.
patent: 5103167 (1992-04-01), Okano et al.

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