FPGA及其设计技术

FPGA And FPGA Design Method

ＦＰＧＡ是新一代的可编程器件，它将定制ＡＳＩＣ的高集成度、高性能的优点与用户可编程器件（ＰＡＬ，ＧＡＬ）的方便灵活的特点结合在一起，从而避免了用定制ＡＳＩＣ的高成本、高风险、长设计周期和使用可编程器件密度低的缺点。但由于ＦＰＧＡ的体系结构与传统的ＴＴＬ器件有非常大的差别，因此其设计方法与传统的ＴＴＬ电路有很大的不同，必须采用适合ＦＰＧＡ体系结构的设计方法，才能取得比较好的设计结果。因此有必要对ＦＰＧＡ的设计方法进行讨论。在本文中对ＦＰＧＡ设计中的时钟信号分配技术、电路构造单元选择技术、人工干预自动布局布线技术、采用冗余技术等进行了较详细的探讨。

FPGA is a new generation programmable device.It has advantage of high integration and high performace of ASIC,and convenience of PAL and GAL.So it avoid high cost,high dangerous and long design circulation of custom ASIC,and low dense of PAL and GAL.Due to architecture of FPGA is different from conventional TTL device′s.So it′s design method is different from conventional TTL device.It must be used the design method to conform to it′s architecture.This paper presents FPGA in chief firstly,then discuss clock design method,circuit configure cell select method,auto route and auto place interfere by designer,place repeat cell design method in detail.