随着微电子技术的发展,先后出现了各种功能不同的大规模集成电路,这些器件虽然具有功耗低、集成度高、功能强等优点;但它们灵活性差、造价高,使用起来又不方便(必须和中小规模器件配合使用)。使用可编逻辑器件可使系统结构 With the development of microelectronic technology, various large-scale integrated circuits with different functions have emerged one after another. Although these devices have the advantages of low power consumption, high integration and strong functions, they have poor flexibility, high cost and are not used Convenient (must be used in conjunction with small and medium-sized devices). The use of programmable logic devices to make the system structure