Abstract: An interleaved signal carry structure includes a first signal line and a second signal line forming a first bus. A third signal line and a fourth signal line form a second bus. A first set of carry function generators are positioned between the first signal line and the third signal line. Carry-in signal lines are attached to the first set of carry function generators. A second set of carry function generators are positioned between the second signal line and the fourth signal line. Intermediate carry signal lines are positioned between the first set of carry function generators and the second set of carry function generators. Carry out signal lines are attached to the second set of carry function generators. A first vertical carry chain comprises a first carry function generator from the first set of carry function generators and a first carry function generator from the second set of carry function generators.

Abstract: A programmable logic device includes an array of logic modules. A standard interconnection grid, with vertical routing lines, horizontal routing lines, and local routing lines, links the array of logic modules. An omniversal bus is positioned over the array of logic modules. The array of logic modules includes selective links to the omniversal bus, such that the omniversal bus dynamically establishes autonomous sub-arrays of logic modules of variable size attached to the omniversal bus.

Abstract: A table-based computer user interface and a method of providing design parameters are provided for configuring circuits for programmable ICs. A design database describing a circuit is displayed in table-based format on a computer screen display. The design database may include a memory map including data to be placed in bit-storage space in the target programmable IC. This design database requires no schematics or HDL description of the circuit, even for application-specific circuits and other complicated circuits. The desired parameters are entered by the user, typically using toggle buttons, pull-down menus, or keyboard entry. The selected parameters and memory map data are then entered into the design database, thereby configuring the design database in accordance with the selected parameters. In one embodiment, the user interface can also be used to display read data from a previously programmed programmable IC.