可编程逻辑器件(PLD)长期来一直受到人们普遍的欢迎.一开始,PLD不仅结构简单,而目密度也高.利用Abel等描述语言或原理图可以很方便输入这些器件的设计.由于这些方法易于学习,而且大多数工程师使用起来也得心应手,因此,它们已成为电路设计的组成部件.但是,自从第一个简单的PLD上市以来,器件技术从未停止向前发展、器件制造商不断在器件结构和实施方面取得进展,产生了复杂的PLD和现场可编程门阵列(FPGA),其密度和复杂性大相径庭.随着器件技术的发展,人们也要求能对设计规格的设计自动化工具拥有更大的选择余地.设计重新使用和不同技术之间的可移植性是存在的两大问题.这些问题如果解决,生产率就可大大提高.但是,为了提高生产率,必须解决三方面的设计规范自动化问题. Programmable Logic Devices (PLDs) have long been widely welcomed by people, and from the outset, PLDs were not only simple in structure but also dense in density, and the design of these devices could be easily entered using descriptions of languages ​​or schematics such as Abel, Easy to learn, and most engineers are handy to use, they have become part of the circuit design, but device technology has never stopped moving forward since the first simple PLD was introduced, device manufacturers continue to be on the device Structure and implementation have led to complex PLDs and Field Programmable Gate Arrays (FPGAs) that have very different densities and complexities. As device technology evolves, there is also a desire to have a larger design automation tool for design specifications The design reuse and portability between different technologies are two major problems that can be solved if they are to be solved, but productivity will have to be improved in order to improve the automation of design specifications in three areas.