Programmable logic circuit device having look up table enabling to reduce implementation area
First Claim
1. A look up table of M inputs and N outputs, comprising:
- a plurality of LUT units; and
an internal configuration control circuit controlling an internal configuration of said plurality of LUT units.
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Accused Products
Abstract
A programmable logic circuit device has a plurality of logic blocks, a plurality of routing wires, a plurality of switch circuits, a plurality of connection blocks, and an I/O block performing an input/output operation with external equipment. The routing wires are connected to each of the logic blocks, the switch circuits are provided at an intersection of each of the routing wires, and the connection blocks are provided between an I/O line of each of the logic blocks and each of the routing wires. Each of the logic blocks has a look up table of M inputs and N outputs, which has a plurality of LUT units; and an internal configuration control circuit controlling an internal configuration of the plurality of LUT units.
200 Citations
20 Claims
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1. A look up table of M inputs and N outputs, comprising:
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a plurality of LUT units; and
an internal configuration control circuit controlling an internal configuration of said plurality of LUT units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A programmable logic circuit device comprising:
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a plurality of logic blocks;
a plurality of routing wires connected to each of said logic blocks;
a plurality of switch circuits provided at an intersection of each of said routing wires;
a plurality of connection blocks provided between an I/O line of each of said logic blocks and each of said routing wires; and
an I/O block performing an input/output operation with external equipment, wherein each of said logic blocks has a look up table of M inputs and N outputs, comprising;
a plurality of LUT units; and
an internal configuration control circuit controlling an internal configuration of said plurality of LUT units. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 18, 19, 20)
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17. A method of configuring a look up table of M inputs and N outputs, comprising the steps of:
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providing a plurality of LUT units; and
selectively controlling I/O signals of said plurality of LUT units to set a predetermined mode of an internal configuration.
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Specification