Organizations of logic modules in programmable logic devices

Details Organizations of logic modules in programmable logic devices Organizations of logic modules in programmable logic devices

2008-05-06

2008-05-06

Cho, James H. (Department: 2819)

Electronic digital logic circuitry

Multifunctional or programmable

Array

C326S047000

Reexamination Certificate

active

11649748

ABSTRACT:
A programmable logic element grouping for use in multiple instances on a programmable logic device includes more than the traditional number of logic elements sharing secondary signal (e.g., clock, clock enable, clear, etc.) selection circuitry. The logic elements in such a grouping are divided into at least two subgroups. Programmable interconnection circuitry is provided for selectively applying signals from outside the grouping and signals fed back from the logic elements in the grouping to primary inputs of the logic elements in the grouping. The programmable interconnection circuitry limits possible application of at least some of these signals to one or the other of the subgroups, and/or provides for possible application of at least some of these signals to a greater percentage of the primary inputs to one of the subgroups than to the other.

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