2.4 High-Performance FPGA Fabric

Built on 65 nm process technology, the IGLOO 2 FPGA fabric is composed of a logic module, a large SRAM (LSARM), an mSRAM, and a math block. The logic module is the basic logic element.

A logic module has the following advanced features:

• A fully permutable 4-input LUT optimized for lowest power
• A dedicated carry chain based on carry look-ahead technique
• A separate flip-flop which can be used independently from the LUT

The 4-input LUT is configured either to implement any 4-input combinatorial function or to implement an arithmetic function where the LUT output is XORed with carry input to generate the sum output.