Programmable logic device macrocell with improved capability

Details Programmable logic device macrocell with improved capability Programmable logic device macrocell with improved capability

1996-12-13

1999-01-19

Santamauro, Jon

Electronic digital logic circuitry

Multifunctional or programmable

Array

326521, H03K 19173

Patent

active

058617604

ABSTRACT:
A macrocell for a programmable logic device includes circuitry for allowing a neighboring macrocell to borrow various numbers of the product terms of the macrocell. The macrocell can continue to make full use of its product terms that are not thus borrowed. This includes logically combining and registering the unborrowed product terms. The macrocell may include circuitry for feeding back to the AND array of the programmable logic device a combinatorial or registered signal of the macrocell, and also outputting such a combinatorial or registered signal from the macrocell. When a combinatorial signal is fed back, the register of the macrocell can be used for another signal of the macrocell.

REFERENCES:
patent: 4742252 (1988-05-01), Agrawal
patent: 4758746 (1988-07-01), Birkner et al.
patent: 4789951 (1988-12-01), Birkner et al.
patent: 4864161 (1989-09-01), Norman et al.
patent: 4871930 (1989-10-01), Wong et al.
patent: 4879481 (1989-11-01), Pathak et al.
patent: 4903223 (1990-02-01), Norman et al.
patent: 4912345 (1990-03-01), Steele et al.
patent: 4918641 (1990-04-01), Jigour et al.
patent: 4942319 (1990-07-01), Pickett et al.
patent: 4983959 (1991-01-01), Breuninger
patent: 5003202 (1991-03-01), Keida
patent: 5027315 (1991-06-01), Agrawal et al.
patent: 5053646 (1991-10-01), Higuchi et al.
patent: 5079451 (1992-01-01), Gudger et al.
patent: 5168177 (1992-12-01), Shankar et al.
patent: 5191243 (1993-03-01), Shen et al.
patent: 5231312 (1993-07-01), Gongwer et al.
patent: 5260610 (1993-11-01), Pedersen et al.
patent: 5414376 (1995-05-01), Hawes
patent: 5598108 (1997-01-01), Pedersen
Altera Max EPLD Family Architecture data sheet, Altera Corporation, Jan. 1990, pp. 1-5.
Advanced Micro Devices MACH 1 and MACH 2 Families data sheet, Advanced Micro Devices, Inc., Apr. 1991, pp. 1-7, 14, 15, 28, 29.
Plus Logic FPGA2020 data sheet, Plus Logic, Inc., date unknown, pp. 1-7.
MACH 3 and 4 Family Data Book, 1993, Advanced Micro Devices, Inc., Sunnyvale, CA.

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