Segmented localized conductors for programmable logic devices
AssigneeAltera Corporation
InventorsRichard G. Cliff, Chiakang Sung
Life of this patent
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Abstract
A programmable logic array integrated circuit device having a two-dimensional array of logic array blocks is provided in which the localized conductors serving each logic array block are segmented. The localized conductors are logic array block conductors that convey signals from associated interblock conductors to logic elements in the logic array blocks and local conductors that convey signals between the logic elements. The localized conductor segments are connected to each other by programmable logic connectors.
Claims7
In a programmable logic device having a plurality of rows and columns of logic array blocks and a plurality of horizontal interblock conductors for each row of said logic array blocks, each of said logic array blocks containing a plurality of logic elements having logic element inputs and a logic element output, each logic element containing programmable logic for providing a selectable logic function of said logic element inputs at said logic element output, the improvement comprising:
- at least one segmented localized conductor associated with each logic array block, each segmented localized conductor being connected to each of the logic element inputs in the associated logic array block by a programmable logic connector and having at least a first segment and a second segment, each of said segmented localized conductors extending past no more than one of said logic array blocks;
- and
- at least one programmable logic connector associated with each segmented localized conductor for electrically connecting said first and second segments.
Dependencies are inferred from the claim text.