1、可编程逻辑器件，即应用EDA技术完成电子系统设计的载体；

2、硬件描述语言（VHDL 或者 Verilog）。它用来描述系统的结构和功

能，是EDA的主要表达手段；

3、配套的软件工具。它用来完成电子系统的智能化设计；

4、实验开发系统。在整个EDA设计电子系统的过程中，实验开发系统是实现可编程器件下载和验证的工具， -A programmable logic device, the application of EDA technology to complete the carrier of the electronic system design　2, the hardware descr iption language (VHDL or Verilog). It is used to describe the structure and function of the system, is the main means of expression of the EDA　3, and the supporting software tools. It is used to complete the intelligent design of electronic systems　experimental development system. In the process of the entire EDA design of electronic systems, experimental development system is a tool to download and verification of programmable devices.