A look-up table circuit that can customize multiple inputs and a new array structure of fpga

A look-up table and polygonal structure technology, applied in logic circuits, electrical components, electrical digital data processing, etc., can solve problems such as inflexible configuration, and achieve the effects of flexible wiring, improved follow-up use efficiency, and increased density

Active Publication Date: 2022-07-01
北京汤谷软件技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that cannot be flexibly configured according to needs, thereby providing a look-up table circuit that can customize multiple inputs

Method used

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  • A look-up table circuit that can customize multiple inputs and a new array structure of fpga
  • A look-up table circuit that can customize multiple inputs and a new array structure of fpga
  • A look-up table circuit that can customize multiple inputs and a new array structure of fpga

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] like figure 2 A specific embodiment of a look-up table circuit that can be customized with multiple inputs is shown, including four six-input look-up table cells, four two-input look-up table cells, six look-up table selectors, two adders, one three-input look-up table input data selector, one four-input data selector, and two two-input data selectors, where,

[0054] Six input terminals of the first six-input look-up table unit 111, the second six-input look-up table unit 112, the third six-input look-up table unit 112, and the fourth six-input look-up table unit 114 multiplex the first input signal in1, the second input signal in2, third input signal in3, fourth input signal in4, fifth input signal in5 and sixth input signal in6;

[0055] Two input terminals of the first two-input lookup table unit 121 , the second two-input lookup table unit 122 , the third two-input lookup table unit 123 and the fourth two-input lookup table unit 123 multiplex the ninth input sign...

Embodiment 2

[0077] like Figure 10 Shown is an embodiment of a customizable FPGA novel array structure, wherein the honeycomb regular hexagonal structure of the customizable multi-input look-up table circuit is tiled to form an FPGA novel array structure. The honeycomb-shaped regular hexagonal structure is a center-symmetric structure; the interval between the polygonal structures is used for programmable wiring; the center of the honeycomb-shaped regular hexagonal structure formed by twelve of the polygonal structures leaves a blank space , for programmable routing or setting logic elements.

[0078] like Figure 11 As shown, the programmable wiring resources are distributed on 6 lines: 0 degrees is the horizontal line, 30 degrees, 60 degrees, 90 degrees is the vertical line, 120 degrees, 150 degrees; each line is distributed in both directions. Wiring resources; programmable wiring resources are composed of three wiring resources: double line, quadruple line and long line, wherein: do...

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PUM

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Abstract

The invention discloses a look-up table circuit capable of customizing multiple inputs and a new FPGA array structure, belonging to the technical field of programmable logic devices, and solving the problems of low density of look-up table logic resources and inflexible configuration in the prior art. Through the connection of several different input lookup table units, several data selectors and adders, the invention can flexibly realize various input lookup tables according to needs, thereby increasing the flexibility and adaptability of application; the FPGA can be customized The new array structure adopts a hexagonal tiled structure, and each hexagon includes twelve polygonal PLBs. The invention is used for realizing various logic functions in the programmable logic device, at the same time increasing the density of the logic device, leaving enough wiring space and facilitating flexible wiring.

Description

technical field [0001] The invention relates to the technical field of FPGA design and development, in particular to a look-up table circuit capable of customizing multiple inputs and a new FPGA array structure. Background technique [0002] Field Programmable Gate Array (FPGA) is a logic device widely used in many fields such as data processing, communication, and network. [0003] In a large-scale FPGA chip, the wiring resources account for more than 70% of the chip area, and the interconnection delay also accounts for more than 70% of the overall delay. Therefore, the performance of the wiring resources largely determines the performance of the FPGA device. The LUT of the traditional FPGA PLB has only one fixed number of bits, which cannot be well adapted to different specific needs and cannot be flexibly configured as needed. [0004] Traditional programmable interconnect resources are usually composed of horizontal interconnect resources and vertical interconnect resou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/347
CPCH03K19/17728
Inventor 刘兴茂刘丹张桂琴暴宇马婧宋太洙张佩文徐国超
Owner 北京汤谷软件技术有限公司
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