CAJ | 학술논문

提出了一种混合FPGA新结构--新颖的AND-LUT阵列结构.其创新之处在于由可编程逻辑簇(Cluster)和相关的连接盒(CB)组成的可编程逻辑单元片(Tile)可以根据应用需要灵活地配置成PLA或LUT,前者较适合于高扇入逻辑,后者较适合于低扇入逻辑.因此,结合两者优点的新颖AND-LUT阵列结构在实现各种输入的用户逻辑时都能保持很好的逻辑利用率.MCNC电路测试结果进一步表明,同一逻辑电路在文中提出的混合FPGA新结构中实现与在基于LUT的对称FPGA结构中实现相比,面积平均可节省46%,因而大大提高了FPGA器件的逻辑利用率.
제출료일충혼합FPGA신결구--신영적AND-LUT진렬결구.기창신지처재우유가편정라집족(Cluster)화상관적련접합(CB)조성적가편정라집단원편(Tile)가이근거응용수요령활지배치성PLA혹LUT,전자교괄합우고선입라집,후자교괄합우저선입라집.인차,결합량자우점적신영AND-LUT진렬결구재실현각충수입적용호라집시도능보지흔호적라집이용솔.MCNC전로측시결과진일보표명,동일라집전로재문중제출적혼합FPGA신결구중실현여재기우LUT적대칭FPGA결구중실현상비,면적평균가절성46%,인이대대제고료FPGA기건적라집이용솔.
A new hybrid FPGA architecture is proposed. The logic tile, which consists of a logic cluster and related connection boxes (CBs), can be configured as either programmable logic arrays (PLAs) or look-up tables(LUTs). This architecture can be classified as an AND-LUT array. PLAs are suitable for the implementation of high fan-in logic circuits,while LUTs are used to implement low fan-in logic circuits. As a result, the proposed hybrid FPGA architecture (HFA) is more flexible to improve logic density. Experiments based on MCNC benchmark circuits were performed in both the hybrid architecture and conventional LUT-based symmetrical FPGA architecture in term of area consumption. Preliminary results indicate that on average,the area is reduced by 46% using the new hybrid architecture.