采用可編程邏輯器件CPLD，分四個模塊——控制寄存器模塊、PCI控制器狀態機模塊、SRAM 控制器模塊和仲裁器模塊，分別完成通信并解析PCI總線、PCI狀態的控制和翻轉、負責SRAM接口數據的讀寫與數據交換、PCI 設備的仲裁機制等來實現PCI 接口，可連接各種PCI 接口的現場通信卡，提高了系統的開放性。
關鍵詞：總線；接口；可編程邏輯器件；開放性 The design of opening interface based on PCI local bus Liu Zhewei1 JinWenbin1 Yan Jianjun1 Wang Xiaoxia2 (Zhejiang Institute of Mechanical & Electrical Engineering,Hangzhou1 ,310053, Hangzhou Zhengu Science and Technology Ltd2,310020) Abstract: The PCI interface is based on CPLD, it is divided into four modules , Control of register module realize communication , PCI controller state module, SRAM controller module and Arbitration module. they carry on correspondence and analyse PCI bus, control PCI state, write-read and exchange with data from SRAM interface, arbitrate PCI device respectively. It may link various communication cards with PCI interface, and improves the systematic openness.
Key words：Bus; Interface; CPLD; Openness