Existing FPGA architectures can be classified along two dimensions:reprogrammable vs. one-time programmable and general-purpose vs. domain specific. The most challenging class of FPGA architectures to design is the reprogrammable, general-purpose FPGA, of which Xilinx is the most well-known example. In this paper we describe Triptych, a new FPGA architecture that addresses two problems of current reprogrammable FPGAs: the large delays incurred in composing large functions and the strict division between routing and logic resources. Our studies indicate that Triptych is more area-efficient than current architectures and has comparable delay characteristics for a large range of circuits that include both data-path elements and control logic.
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