Design of a Multi-Context FPGA Using a Floating-Gate-MOS Functional Pass-Gate

Multi-context FPGAs (MC-FPGAs) have multiple memory bits per configuration bit forming configuration planes for fast switching between contexts. The additional memory planes cause significant overhead in area and power consumption. To overcome the overhead, a fine-grained MC-FPGA architecture using a floating-gate-MOS functional pass gate (FGFP) is presented which merges threshold operation and storage function on a single floating-gate MOS transistor. The transistor count of the proposed multi-context switch (MC-switch) is reduced to 10% in comparison with SRAM-based one. The transistor count of the proposed MC-switch is also reduced to 20% in comparison with the MC-switch that uses floating-gate MOS transistors just as storage device. The test chip is designed using a 0.35mum EPROM technology, and the area of the proposed MC-FPGA is reduced to about 50% of that of a conventional MC-FPGA