Patent ID: 7046034
Filing Date: 2006-05-16
Classification: H03K

Abstract:
1. A programmable logic device comprising: programmable interconnect circuitry; programmable input-output circuitry coupled to the programmable interconnect circuitry; and an array of programmable logic blocks, each logic block including a plurality of programmable logic elements coupled to the interconnect circuitry, wherein at least one of the programmable logic elements in a logic block is programmable to implement a first set of functions, and at least one other of the programmable logic elements in the logic block is programmable to implement a second set of functions that is a proper subset of the first set of functions; and wherein each programmable logic element includes at least one lookup table having input ports coupled to the programmable interconnect circuitry and at least one look-up table programmable to implement a logic function; and wherein each programmable logic element further includes at least one storage element having an input port coupled to an output port of a corresponding lookup table and an output port coupled to the programmable interconnect circuitry.