Electronic digital logic circuitry – Multifunctional or programmable – Array
Patent
1997-03-24
1999-10-05
Tokar, Michael
Electronic digital logic circuitry
Multifunctional or programmable
Array
326 39, 326 37, H01L 2500
Patent
active
059630507
ABSTRACT:
The invention provides an FPGA interconnect structure preferably included in an array of identical tiles. Each tile comprises a logic block that includes a Configurable Logic Element (CLE) and an output multiplexer. Fast feedback paths are provided within the logic block to connect the CLE outputs to the CLE inputs, either directly or through an input multiplexer. The fast feedback paths bypass the output multiplexer and therefore provide faster feedback than can be obtained in most conventional FPGA logic blocks. In one embodiment, the fast feedback paths provide the ability for all function generators in one CLE to drive each other through fast feedback paths, regardless of how logic is mapped into the function generators of the CLE.
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Bapat Shekhar
Bauer Trevor J.
Camilleri Nicolas John
Chaudhary Kamal
Krishnamurthy Sridhar
Cartier Lois D.
Tokar Michael
Tran Anh Q
Xilinx , Inc.
Young Edel M.
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