Registered logic macrocell with product term allocation and adja

Details Registered logic macrocell with product term allocation and adja Registered logic macrocell with product term allocation and adja

1991-04-22

1992-06-09

Hudspeth, David

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

H03K 19177

Patent

active

051210061

ABSTRACT:
A macrocell with product term allocation and adjacent product term stealing is disclosed. Programmable configuration switches provide product term allocation by directing input product terms to an OR gate or to the secondary inputs to a register. Adjacent product term stealing is accomplished by providing the output of the OR gate of each macrocell as an input to the OR gate of an adjacent macrocell. By using the output of the OR gate of the first macrocell, the adjacent macrocell steals the product terms and the OR gate of the first macrocell for use in its own OR gate. An arbitrarily wide OR function can be implemented by daisy chaining the OR gates of adjacent macrocells. Because programmable configuration switches can direct individual input product terms to the register logic instead of the OR gate, the register logic can be used even when an adjacent macrocell steals the OR gate.

REFERENCES:
patent: 4758746 (1988-07-01), Birkner et al.
patent: 4879481 (1989-11-01), Pathak et al.
patent: 4912345 (1990-03-01), Steele et al.
patent: 4918641 (1990-04-01), Jigour et al.
patent: 4983959 (1991-01-01), Breuninger
patent: 5003202 (1991-03-01), Keida
patent: 5053646 (1991-10-01), Higuchi et al.
Altera Max EPLD Family Architecture, Jan. 1990, pp. 1-5.
Advanced Micro Devices MACH Device Family, Apr. 1991, pp. 1-7, 14-15.
Plus Logic FPGA2020, preliminary data, date unknown, pp. 1-7.

Affiliated with

Also associated with

Rating

Registered logic macrocell with product term allocation and adja does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Registered logic macrocell with product term allocation and adja, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Registered logic macrocell with product term allocation and adja will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1806813