Patent US 7,053,653

An inter-tile buffering system for a field programmable gate array (FPGA) comprising a plurality of FPGA tiles arranged in rows and columns. Each tile comprises a plurality of functional and interface groups and a primary routing structure, which is coupled to the functional and interface groups and is configured to receive and route primary output signals within at least one FPGA tile, and provide primary input signals to the functional and interface groups. Each functional group is configured to receive input signals, perform logic operations, and generate output signals and is configured to transfer signals from the routing structure to outside of at least one FPGA tile, and includes a plurality of input multiplexers configured to select signals received from outside at least one FPGA tile and provide signals to the routing structure inside at least one FPGA tile.