Programmable logic device

Details Programmable logic device Programmable logic device

1988-01-13

1989-07-11

Weldon, Ulysses

Communications: electrical

Continuously variable indicating

With meter reading

307465, 340825830, H04Q 100

Patent

active

048476129

ABSTRACT:
A programmable logic device architecture having a matrix of smaller functional units, each of which being a programmable logic array, and a set of fixed conductive lines connected to the functional unit inputs and outputs, the conductive lines forming programmable interconnection matrices. The input pins can be programmably connected to any input of any functional unit, and the outputs of functional units can be programmably connected to any input of any functional unit or any output pin. The interconnection matrices may be a simple array of crossing conductive lines with crossings connected by fuses, EPROM, or EEPROM switches or may have additional series switches to limit the effective impedance so as to speed propagation through these matrices. A fast path through one functional unit bypassing the interconnection matrices is available for a limited number of input and output pins. Multiplexers and other structures may be provided at ends of the fixed conductive lines to enable exhaustive testing of individual functional units, interconnections and logic, and structure may also be provided for on-chip monitoring of state information and providing the information to the external world when certain preselected events happen.

REFERENCES:
patent: 4124899 (1978-11-01), Birkner et al.
patent: 4207556 (1980-06-01), Sugiyama et al.
patent: 4314349 (1982-02-01), Batcher
patent: 4414547 (1983-11-01), Knapp et al.
patent: 4422072 (1983-12-01), Cavlan
patent: 4431928 (1984-02-01), Skokan
patent: 4609986 (1986-09-01), Hartmann et al.
patent: 4642487 (1987-02-01), Carter
patent: 4670749 (1987-06-01), Freeman
patent: 4763020 (1988-08-01), Takata et al.
Ikawa et al., "A One-Day Chip: An Innovative IC Construction Approach . . . ", IEEE Journal of Solid-State Circuits, vol. SC-21, No. 2, Apr. 1986, pp. 223-227.
"Technology to Watch: Programmable Logic Devices", Electronics, Sep. 17, 1987, pp. 65-72.
P. Robinson, "Overview of Programmable Hardware", BYTE, Jan. 1987, pp. 197-203.
V. Coli, "Introduction to Programmable Array Logic", BYTE, Jan. 1987, pp. 207-219.

Affiliated with

Also associated with

Rating

Programmable logic device 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 device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Programmable logic device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-439659