Digital integrated circuits

Details Digital integrated circuits Digital integrated circuits

1986-07-07

1988-03-08

Smith, Jerry

Excavating

371 15, 324 73R, G01R 3128

Patent

active

047303166

ABSTRACT:
A digital integrated circuit is described in which the internal registers are organized into a number of serial shift paths to facilitate testing. Each path has a number of modes: USER, HOLD, SHIFT and SELF-TEST modes. These modes are controlled by shifting a control function into a control shift register. When the shifting of the control shift register stops, a command is automatically loaded from the control shift register (or another source) into a command register, which controls the serial shift paths. The provision of a separate command register allows a new control function to be shifted into the control shift register while a preceding command is still active in the command register.

REFERENCES:
patent: 4019033 (1977-04-01), Parmet
patent: 4521884 (1985-06-01), Dix
patent: 4597080 (1986-06-01), Thatte

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