This paper proposes a programmable logic element (PLE) based on Sense-Switch type pFLASH technology. By programming the Sense-Switch type pFLASH, all three-input lookup table (LUT3) functions, some LUT4 functions, latch functions, and D flip-flop (DFF) functions with enable and reset capabilities are realized. Because the PLE uses a method called Combinational Operation Logic (COOL) to compute logic functions, it allows for the implementation of any logic circuit using arbitrary combinations of logic and registers. This intrinsic characteristic brings it close to basic ASIC units in terms of fine granularity, thereby allowing ASIC-like cell-based mappers to apply all their optimization potential. Measured results of the Sense-Switch type pFLASH and PLE circuits show that the “on-state” driving current of the Sense-Switch type pFLASH is approximately 245.52 μA, and the “off-state” leakage current is about 0.1 pA; the programmable functions of the PLE are working properly; the typical delay of the combinational logic operation AND3 is 0.69 ns, and the delay of the sequential logic DFF is 0.65 ns, both meeting the design technical specifications.
Field Programmable Gate Array; Programmable Logic Element; Boolean Logic Operation; Lookup Table; Sense-Switch type pFLASH; Threshold Voltage
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Zhengzhou CAO, Guozhu LIU, Yanfei ZHANG, Yuer SHAN, Yuting XU
No. 58 Research Institute of China Electronics Technology Group Corporation, Wuxi, Jiangsu, 214035, China
Zhengzhou CAO, Guozhu LIU, Yanfei ZHANG, et al., 2024. Design and verification of an FPGA programmable logic element based on Sense-Switch pFLASH. Frontiers of Information Technology & Electronic Engineering, 25(4):485-499.
https://doi.org/10.1631/FITEE.2300454
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Frontiers of Information Technology & Electronic Engineering (abbreviated as FITEE, ISSN 2095-9184, CN 33-1389/TP) is a comprehensive English academic monthly journal in the field of information electronics, indexed by SCI-E and EI,
Latest impact factor 3.0, located in JCR Q2 area. It originated from the “Journal of Zhejiang University, English Edition C: Computer and Electronics” founded in 2010, renamed in 2015, and is now a sub-journal of the Academy of Engineering of China in the field of information and electronic engineering. It covers fields such as computer, information and communication, control, electronics, and optics. Article types include research papers, reviews, personal viewpoints, and commentaries. The current editor-in-chief is Academician Pan Yunhe and Fei Aiguo of the Chinese Academy of Engineering. The journal implements an international peer review system, and initial feedback is generally received within 2-3 months. Once accepted, articles will be published online quickly.
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