Multifunctional and configurable six-input lookup table structure

Abstract

The invention relates to a multifunctional and configurable six-input lookup table structure. The lookup table structure with different inputs and sharing with different signal numbers can be configured by flexibly selecting configuration signals, a function extension logic chain is designed, and a wide logic function can be achieved rapidly without external wiring. A special adder carry chain and an operand selection control end are designed, carry signals enter the lookup table through a four-input lookup table, and wide logic operation on a sum function of an adder and other operand can be achieved rapidly. Due to high flexibility and configuration capacity of the lookup table and the rapid carry of the carry chain, the wide logic function can be achieved through fewer logic resources, multiple functions are achieved, the utilization rate of wiring resources can be improved effectively, the occupied area of the resources is reduced, the working speed of a chip is improved, and more functions and applications can be achieved with limited gate counts.

Description

technical field [0001] The invention relates to a look-up table structure, in particular to a multifunctional and configurable six-input look-up table structure, which belongs to the technical field of programmable logic devices. Background technique [0002] Programmable logic devices based on look-up tables (Look-up Table, LUT) have short development cycle, low cost, low risk, high integration, high flexibility, and easy maintenance and upgrade of electronic systems. Mainstream, it is widely used in many fields such as communication, control, video, information processing, consumer electronics, Internet, automobile and aerospace. [0003] The look-up table is the most basic and core logic component in the structure of programmable logic devices. The current mainstream look-up tables are mainly four-input and six-input, with the best area and delay performance, such as Xilinx's Virtex series, Altera's Stratix series etc. With the enhancement of application system function...

AI Technical Summary

Problems solved by technology

The increase in the number of FPGA gates increases the ability to realize functions and increases functions, but its performance decreases accordingly, such as larger chip area, higher power consumption, and slower speed, etc., which restrict the performance of the entire system. Therefore, it is not only necessary to reduce Small process size, while increasing the number of gate arrays, it is also necessary to improve the application capabilities of each logic block

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