Programmable logic array integrated circuit architectures

Details Programmable logic array integrated circuit architectures Programmable logic array integrated circuit architectures

1997-02-28

1999-10-05

Santamauro, Jon

Electronic digital logic circuitry

Multifunctional or programmable

Array

326 39, H03K 19177

Patent

active

059630493

ABSTRACT:
A programmable logic array integrated circuit device has a plurality of regions of programmable logic disposed on the device in a two-dimensional array of intersecting rows and columns of regions. The output signals of several regions share a group of drivers for applying region output signals to interconnection conductors that convey signals between regions. This conserves driver resources and increases signal routing flexibility. Various approaches can be used for configuring the interconnection conductors to also conserve interconnection conductor resources. Logic regions may be used to directly drive specific input/output cells, thereby simplifying signal routing to the I/O cells and also possibly simplifying the structure of the I/O cells (e.g., by allowing certain I/O cell functions to be performed in the associated logic region). Region output signal routing flexibility may also be enhanced to facilitate simultaneous performance of combinatorial logic and a separate "lonely register" function in modules of the regions.

REFERENCES:
patent: Re34363 (1993-08-01), Freeman
patent: 3473160 (1969-10-01), Wahlstrom
patent: 4609986 (1986-09-01), Hartmann et al.
patent: 4617479 (1986-10-01), Hartmann et al.
patent: 4642487 (1987-02-01), Carter
patent: 4677318 (1987-06-01), Veenstra
patent: 4713792 (1987-12-01), Hartmann et al.
patent: 4758745 (1988-07-01), Elgamal et al.
patent: 4774421 (1988-09-01), Hartmann et al.
patent: 4871930 (1989-10-01), Wong et al.
patent: 4899067 (1990-02-01), So et al.
patent: 4912342 (1990-03-01), Wong et al.
patent: 5023606 (1991-06-01), Kaplinsky
patent: 5073729 (1991-12-01), Greene et al.
patent: 5121006 (1992-06-01), Pedersen
patent: 5122685 (1992-06-01), Chan et al.
patent: 5132571 (1992-07-01), McCollum et al.
patent: 5144166 (1992-09-01), Camarota et al.
patent: 5208491 (1993-05-01), Ebeling et al.
patent: 5220214 (1993-06-01), Pedersen
patent: 5258668 (1993-11-01), Cliff et al.
patent: 5260610 (1993-11-01), Pedersen et al.
patent: 5260611 (1993-11-01), Cliff et al.
patent: 5274581 (1993-12-01), Cliff et al.
patent: 5350954 (1994-09-01), Patel
patent: 5371422 (1994-12-01), Patel et al.
patent: 5448186 (1995-09-01), Kawata
patent: 5483178 (1996-01-01), Costello et al.
patent: 5509128 (1996-04-01), Chan
patent: 5543732 (1996-08-01), McClintock et al.
patent: 5565793 (1996-10-01), Pedersen
patent: 5670895 (1997-09-01), Kazarian et al.
patent: 5705939 (1998-01-01), McClintock et al.
R. C. Minnick, "A Survey of Microcellular Research," Journal of the Association for Computing Machinery, vol. 14, No. 2, pp. 203-241, Apr. 1967.
S. E. Wahlstrom, "Programmable Logic Arrays --Cheaper by the Millions," Electronics, Dec. 11, 1967, pp. 90-95.
Recent Developments in Switching Theory, A. Mukhopadhyay, ed., Academic Press, New York, 1971, chapters VI and IX, pp. 229-254 and 369-422.
El Gamal et al., "An Architecture for Electrically Configurable Gate Arrays," IEEE Journal of Solid-State Circuits, vol. 24, No. 2, Apr. 1989, pp. 394-398.
El-Ayat et al., "A CMOS Electrically Configurable Gate Array," IEEE Journal of Solid-State Circuits, vol. 24, No. 3, Jun. 1989, pp. 752-762.
"XC5000 Logic Cell Array Family, Technical Data, Advance Information," Xilinix, Inc. Feb. 1995.
The Programmable Gate Array Data Book, 1988, Xilinx, Inc., San Jose, CA (see especially pp. 2-12).
ACT Family Field Programmable Gate Array Databook, Apr. 1992, Actel Corporation, Sunnyvale, CA, pp. 1-35 through 1-44.
The Programmable Logic Data Book, 1994, Xilinx, Inc., San Jose, CA, pp. 2-7,2-12, and 2-13.

Affiliated with

Also associated with

Rating

Programmable logic array integrated circuit architectures does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Programmable logic array integrated circuit architectures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Programmable logic array integrated circuit architectures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1175692