Large-scale integrated circuit device

Details Large-scale integrated circuit device Large-scale integrated circuit device

1993-03-10

1994-08-23

Beausoliel, Jr., Robert W.

Excavating

371 151, H04B 1700

Patent

active

053413806

ABSTRACT:
A large-scale integrated circuit, according to the present invention, comprises an integrated circuit function block having an original circuit function as the integrated circuit, a serial bus function block for setting and changing of an internal function of the integrated circuit function block, the serial bus function block including a clock terminal for receiving a clock signal, a bus busy terminal receiving a serial bus busy signal as an operation designating signal, and a serial data terminal receiving a serial data, a boundary scanning function block for checking wiring of the integrated circuit function block after installation on a circuit board, the boundary scanning function block including a clock terminal receiving a clock signal, a test mode select terminal for receiving a rest mode select signal as an operation designation signal and a test data terminal for receiving a test data, and the serial bus function block and the boundary scanning function block being so coupled to so that at least one of pairs of terminals consisted of both of the clock terminals, the bus busy terminal and the test mode select terminal, and the serial data terminal and the test data terminal being formed with a common terminal.

REFERENCES:
patent: 4879717 (1989-11-01), Saverwald et al.
patent: 5130988 (1992-07-01), Wilcox et al.
patent: 5198759 (1993-03-01), Ohnesorge
patent: 5225772 (1993-07-01), Cheung et al.

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