THE TRIPTYCH FPGA ARCHITECTURE

Field-programmable gate arrays (FPGA's) are an important implementatio n medium for digital logic, Unfortunately, they currently suffer from poor silicon area utilization due to routing constraints, In this pape r we present Triptych, an FPGA architecture designed to achieve improv ed logic density with competitive performance, This is done by allowin g a permapping tradeoff between logic and routing resources, and with a routing scheme designed to match the structure of typical circuits, We show that, using manual placement, this architecture yields a logic density improvement of up to a factor of 3.5 over commercial FPGA's, with comparable performance, We also describe Montage, the first FPGA architecture to fully support asynchronous and synchronous interface c ircuits.