A Novel RFET-Based FPGA Architecture Based on Delay-Aware Packing Algorithm
Lu Sheng, Liuting Shang, Sungyong Jung, Qilian Liang, Chenyun Pan · IEEE Transactions on Emerging Topics in Computing · 2025
Reconfigurable devices are attracting growing interest as both a potential alternative and complement to traditional CMOS technology. This paper develops a novel fieldprogrammable gate array (FPGA) architecture based on MClusters, which is made of fast and area-efficient 2-input lookup tables (LUTs) through reconfigurable field-effect transistors (RFETs). To fully utilize the MClusters, we propose an SAT-based delay-aware packing algorithm for the technology mapping. In addition, we integrate a partitioning algorithm to divide the circuit into several sub-circuits to further reduce the global routing resources and their associated switching energy of the system. Finally, we develop an efficient technology/circuit/system co-design framework for optimizing the overall performance of FPGAs. Based on comprehensive benchmarking, results demonstrate that optimal design yields significant reductions of up to 39% area, 36% wire length, and 40% switching energy compared to traditional CMOS 6-input LUT FPGAs.