Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1992-09-03
1994-09-20
Westin, Edward P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
3072021, 34082584, 364489, 364490, H03K 19177, H01H 3776
Patent
active
053492480
ABSTRACT:
For antifuse programmable integrated circuit devices, in particular FPGA devices, the invention allows for alternative routing around antifuses which fail to program. The chip architecture includes wiring segments and antifuses which together allow for alternative routes around every antifuse in the event of failure of that antifuse. The method includes programming the device under control of a computer which can recalculate routes in the event of an antifuse which fails to program. Preferably the initial routing distributes unused wiring segments through the chip to be available for routing around a failed antifuse. When a failure occurs, the method includes determining an alternative route around every failed antifuse. The alternative route may be established directly after the antifuse has failed or after all initially selected antifuses have been programmed. The method also includes swapping of logic cell inputs, logic cells, and/or logic blocks from their original layout to adapt to a failed antifuse without changing the timing of signals which would have used the failed antifuse.
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Goetting F. Erich
Parlour David B.
Trimberger Stephen M.
Santamauro Jan
Westin Edward P.
Xilinx , Inc.
Young Edel M.
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