Integrated logic circuit with functionally flexible input/output

Details Integrated logic circuit with functionally flexible input/output Integrated logic circuit with functionally flexible input/output

1992-03-12

1993-07-27

Hudspeth, David R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

3074651, H03K 19177

Patent

active

052313123

ABSTRACT:
An integrated circuit package including a plurality of macrocells for connecting a logic circuit of the package to a plurality of external contacts of the package. At least one of the macrocells has an output driver that is enabled or disabled by a control signal for transmitting or preventing transmission of a logic signal to one of the contacts. The control signal is generated by a logic gate that receives and logically combines an individual output enable signal dedicated to that particular macrocell with a selected signal. One signal that may be selected is a regional output enable signal that is supplied to more than one macrocell. Each macrocell also has a feedback multiplexer selecting one signal to be sent to the logic circuit. Choices include a nonstored logic signal, a stored logic signal from a flip-flop register in the macrocell, a signal applied to the external contact associated with that macrocell, and a signal applied to another external contact associated with a different macrocell. A plurality of contacts are connected to feedback multiplexers in two different macrocells, and at least one contact connects in this manner to separate logic regions of the logic circuit. The flip-flop register in the macrocell has a choice of data inputs selected by another multiplexer from among at least one logic signal from the logic circuit and at least one signal applied to an external contact.

REFERENCES:
patent: 4609986 (1986-09-01), Hartmann et al.
patent: 4617479 (1986-10-01), Hartmann et al.
patent: 4717912 (1988-01-01), Harvey et al.
patent: 4742252 (1988-05-01), Agrawal
patent: 4758746 (1988-07-01), Birkner et al.
patent: 4761768 (1988-08-01), Turner et al.
patent: 4771285 (1988-09-01), Agrawal et al.
patent: 4789951 (1988-12-01), Birkner et al.
patent: 4855954 (1989-08-01), Turner et al.
patent: 4879481 (1989-11-01), Pathak et al.
patent: 4879688 (1989-11-01), Turner et al.
patent: 4896296 (1990-01-01), Turner et al.
patent: 4912345 (1990-03-01), Steele et al.
patent: 4918641 (1990-04-01), Jigour et al.
patent: 4931671 (1990-06-01), Agrawal
patent: 4963768 (1990-10-01), Agrawal et al.
patent: 4992679 (1991-02-01), Takata et al.
patent: 5023484 (1991-06-01), Pathak et al.
patent: 5027315 (1991-06-01), Agrawal et al.
patent: 5046035 (1991-09-01), Jigour et al.
patent: 5151623 (1992-09-01), Agrawal
Atmel Corporation, CMOS EPLD and Gate Arrays, see especially pp. 4, 20, 38, 54 and 55, publ. 1991 at San Jose, Ca.
Intel Corporation, 5C121, 1200 Gate CHMOS, H-Series Erasable Programmable Logic Device, see especially pp. 3, 6 and 7 publ. Jan. 1986.
Altera Corporation, EPM5016 to EPM5192: High-Speed, High Density MAX EPLDs, pp. 115-121, publ. Oct. 1990.
Altera Corporation, EP900-series EPLDs, High Performance 24-Macrocell Devices, pp. 71-79, publ. Oct. 1990.
Altera Corporation, EP600-Series EPLDs, High Performance 16-Macrocell Devices, pp. 49-57, publ. Oct. 1990.
Altera Corporation, EP300-Series EPLDs, High Performance 8-Macrocell Devices, pp. 33-39, publ. Oct. 1990.
Exel Microelectronics, Inc., XL78C800, ERASIC Multi-Level E.sup.2 PLDs, see especially FIG. 4, publ. 1986 at Redmond, Wa.
Advanced Micro Devices, MACH Device Family, High Density EE CMOS Programmable Logic, see especially FIGS. 3 and 7, nd.

Affiliated with

Also associated with

Rating

Integrated logic circuit with functionally flexible input/output does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Integrated logic circuit with functionally flexible input/output, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integrated logic circuit with functionally flexible input/output will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2344151