An assignment of a node or entity in a project to a particular pin, logic cell, Logic Array Block (LAB), Embedded System Block (ESB), ESB Row, Embedded Array Block (EAB), MegaLAB^™ structure, MegaLAB row, MegaLAB column, ClockLock^® PLL, region, custom region, fast region, row, or column. This type of resource assignment assigns a logic function to a physical resource in a device.

A resource assignment can also consist of a clique, logic option, timing requirement, or local routing assignment to a particular node or entity in a project. This type of resource assignment assigns a compilation resource to a logic function.