INTEGRATED CIRCUIT THAT INCLUDES A FIELD-PROGRAMMABLE GATE ARRAY AND A HARD GATE ARRAY HAVING THE SAME UNDERLYING STRUCTURE

An integrated circuit (IC) includes both a field-programmable gate array (FPGA) and a hard array (HA). The FPGA includes a first set of functional groups that each include an underlying logic structure and memory cells for programming the underlying logic structure, a first set of routing buses, and a first set of routing interconnect areas that provide interconnections between the first set of functional groups and the first set of routing buses. The first set of routing interconnect areas includes transistors and memory cells for programming the interconnections. The HA includes a second set of functional groups that is equal in number to the first set of functional groups and that are arranged like the first set of functional groups. Each functional group in the second set of functional groups includes an underlying logic structure that is like the underlying logic structure of the first set of functional groups but which does not include memory cells for programming the underlying logic structure. The HA also includes a second set of routing buses that are arranged like the first set of routing buses and a second set of routing interconnect areas that are arranged like the first set of routing interconnect areas but which do not include transistors and memory cells for programming interconnections.