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现场可编程门阵列(FPGA)由掩模可编程门阵列(MPGA)和可编程逻辑器件(PLD)两者演变而来并将它们的特性结合在一起,因此FPGA既有门阵列的高逻辑密度和通用性,又有可编程逻辑器件的用户可编程特性.它通常由布线资源围绕的可编程逻辑单元构成阵列,又由可编程I/O单元围绕阵列构成整个芯片,排成阵列的逻辑单元由布线通道中的可编程内连线连结起来实现一定的逻辑功能.对于ASIC设计来说,采用FPGA在实现小型化、集成化和高可靠性的同时,减少了风险,降低了成本,缩短了周期.这些特点使FPGA近年来发展迅速.Xilinx公司为适应各种应用的需要,在1995年推出多个新产品系列,如有双口RAM的XC4000E,大容量低成本的XC5200系列,反熔丝型门海结构的XC8100系列和可再配置协处理器的XC6200系列等,以及XACT6.0开发系统,由此也可看出FPGA的发展势头.本文以XC8100系列为主对其新产品作一介绍.
Field programmable gate arrays (FPGAs) evolved from both mask programmable gate arrays (MPGAs) and programmable logic devices (PLDs) and combine their characteristics so FPGAs have a high logic density of gate arrays. And versatility, but also programmable logic device user-programmable features. It is usually formed by the array of programmable logic cells around the wiring resources, but also by the programmable I / O unit around the array to form the entire chip, an array of logical units Certain logic functions are realized by the programmable interconnects in the routing channel. For the ASIC design, FPGAs are used to achieve miniaturization, integration, and high reliability while reducing risks, reducing costs, and shortening Cycles. These features make FPGAs develop rapidly in recent years. Xilinx has introduced several new product series in 1995 to meet the needs of various applications, such as the XC4000E with dual-port RAM, the large-capacity and low-cost XC5200 series, and anti-fuse. The XC8100 series of door-sea structure and the XC6200 series of reconfigurable coprocessors, as well as XACT6.0 development system, can also see the development momentum of FPGA. This article focuses on the XC8100 series for its new products. Shao.