Configurable IC's with dual carry chains
First Claim
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1. A configurable IC comprising:
- a) a plurality of configurable logic circuits, wherein the logic circuits include a plurality of sets of associated configurable logic circuits; and
b) for each of a plurality of sets of associated configurable logic circuits, first and second circuitry for establishing carry signal flow in two directions through the configurable logic circuits, a carry signal flow representing a flow of a carry signal during an add operation performed by a set of associated configurable logic circuits.
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Abstract
Some embodiments provide a configurable IC that includes several configurable logic circuits, where the logic circuits include several sets of associated configurable logic circuits. For each of several sets of associated configurable logic circuits, the configurable IC includes first and second circuitry for establishing carry signal flow in two directions through the configurable logic circuits. A carry signal flow representing a flow of a carry signal during an add operation performed by a set of associated configurable logic circuits. In some embodiments, the two carry signals flow in opposing directions through the set of logic circuits.
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Citations
22 Claims
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1. A configurable IC comprising:
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a) a plurality of configurable logic circuits, wherein the logic circuits include a plurality of sets of associated configurable logic circuits; and
b) for each of a plurality of sets of associated configurable logic circuits, first and second circuitry for establishing carry signal flow in two directions through the configurable logic circuits, a carry signal flow representing a flow of a carry signal during an add operation performed by a set of associated configurable logic circuits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A electronic device comprising:
a configurable integrated circuit (“
IC”
) comprising;
a plurality of configurable logic circuits, wherein the logic circuits include a plurality of sets of associated configurable logic circuits; and
for each of a plurality of sets of associated configurable logic circuits, first and second circuitry for establishing carry signal flow in two opposing directions through the configurable logic circuits, a carry signal flow representing a flow of a carry signal during an add operation performed by a set of associated configurable logic circuits. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
Specification