Programmable logic device with programmable inverters at input/o

Details Programmable logic device with programmable inverters at input/o Programmable logic device with programmable inverters at input/o

1990-03-01

1991-07-02

Hudspeth, David

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307468, 307471, H03K 19177

Patent

active

050288210

ABSTRACT:
A programmable logic device having a plurality of functional units, a programmable interconnect matrix for connecting the functional units together, input and output pins coupled to the interconnect matrix, and programmable inverters connected between the pins and conductive lines of the matrix to permit external signals leading into or out of the interconnect matrix to be inverted, if desired. Each functional unit may itself be a programmable logic device with inputs, an AND array connected to the inputs, an OR array connected to the AND array, optional registers and inverters on the output side of the OR array, and outputs coupled to the OR array, the registers or the inverters. The programmable interconnect matrix includes two sets of conductive lines crossing one another and connectable by programmable links at each intersection. The lines connect to functional unit inputs and to input and output pins.

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