US Patent 7276934 Integrated circuit with programmable routing structure including diagonal interconnect lines

A programmable integrated circuit (IC) includes rows and columns of tiles, each tile including logic blocks, segments of interconnect lines, and programmable structures (e.g., routing multiplexers driving the interconnect lines, input multiplexers driving the logic blocks). The interconnect lines can be used, for example, to interconnect two programmable structures included in tiles located in different rows and different columns. Thus, these “diagonal” interconnect lines also have programmable access to other diagonal interconnect lines in the general interconnect structure. In some embodiments, the diagonal interconnect lines include “doubles”, which interconnect programmable structures in tiles diagonally adjacent to one another, and “pents”, which interconnect programmable structures in tiles separated by two intervening rows (or columns) and one intervening column (or row). In some embodiments, a diagonal interconnect line coupled between first and second tiles include an interconnection to a programmable structure in a tile at the “corner” of the diagonal interconnect line.