Method and structure for providing a flip flop circuit with a co

Details Method and structure for providing a flip flop circuit with a co Method and structure for providing a flip flop circuit with a co

1995-04-26

1996-06-18

Hudspeth, David R.

Electronic digital logic circuitry

Multifunctional or programmable

Array

326 46, 327218, H03K 190175

Patent

active

055281699

ABSTRACT:
A method and structure for a configurable flip flop circuit. The configurable flip flop circuit includes a flip flop, a first signal line for receiving a first signal, a second signal line for receiving a second signal, a first enable line for receiving a first enable signal, a second enable line for receiving a second enable signal, a programmable logic circuit and a multiplexer circuit. The programmable logic circuit receives the first and second enable signals from the first and second enable lines. In response, the programmable logic circuit generates multiplexer control signals which are provided to the multiplexer circuit. The multiplexer circuit selectably couples the first signal line, the second signal line, and the output terminal of the flip flop to the flip flop input terminal in response to the multiplexer control signals. The programmable logic circuit can be programmed to provide different multiplexer control signals in response to the same first and second enable signals, thereby advantageously allowing the priority of the first and second enable signals to be selected.

REFERENCES:
patent: 5027011 (1991-06-01), Steele
patent: 5302866 (1994-04-01), Chiang et al.
patent: 5317210 (1994-05-01), Patel
patent: 5410194 (1995-04-01), Freidin et al.
patent: 5430390 (1995-07-01), Chan et al.
patent: 5442306 (1995-08-01), Woo
patent: 5451887 (1995-09-01), El-Ayat et al.

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