Electronic digital logic circuitry – Multifunctional or programmable – Array
Patent
1997-01-31
1999-09-28
Tokar, Michael
Electronic digital logic circuitry
Multifunctional or programmable
Array
326 41, H03K 738
Patent
active
059594667
ABSTRACT:
A hybrid integrate circuit architecture comprising a mask programmable portion and a field programmable gate array portion. The mask programmable portion has a plurality of mask programmed input and output buffer circuits, and a first group of input/output pads, wherein one of the input/output pads of the first group is connected to an input of one of the input buffer circuits, and one of the input/output pads of the first group is connected to an output of one of the output buffer circuits. The field programmable gate array portion has programmable digital logic function modules, a second group of input/output pads, interconnect conductors divided into one or more segments, wherein some segments run in a first direction and some segments run in a second direction to form intersections and some segments form intersections with inputs and outputs of the digital logic function modules, the first group of input/output pads, and inputs and outputs of the output and input buffer circuits from the mask programmable portion, and user programmable interconnect elements connected between adjoining ones of the segments in a same one of the interconnect conductors, and between intersections of selected ones the first and second segments, intersections of inputs and outputs of the digital logic function modules and selected interconnect conductors, intersections of the first group of input/output pads and selected ones of the interconnect conductors, intersections with outputs of the input buffer circuits and selected ones of the interconnect conductors, and intersections with the inputs of the output buffer circuits and selected ones of the interconnect conductors.
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Actel Corporation
Roseen Richard
Tokar Michael
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