Abstract
This paper proposes a new field-programmable architecture that is a combination of two existing technologies: Field Programmable Gate Arrays (FPGAs) based on LookUp Tables (LUTs), and Complex Programmable Logic Devices based on PALs/PLAs. The methodology used for development of the new architecture, called Hybrid FPGA, is based on analysis of a large set of benchmark circuits, in which we determine what types of logic resources best match the needs of the circuits. The proposed Hybrid FPGA is evaluated by manually technology mapping a set of circuits into the new architecture and estimating the total chip area needed for each circuit, compared to the area that would be required if only LUTs were available. Preliminary results indicate that compared to LUT-based FPGAs the Hybrid offers savings of more than a factor of two in terms of chip area.
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