本文介绍了基于PCI接口的500 MHz高速数据采集系统的设计。该系统采用高速FPGA和大容量存储器对高速采集后的海量数据进行缓冲和存储，通过PCI接I=l电路实现和主机的通信。另外还详细介绍了PLX公司的一款先进的总线控制PCI9054的特性、总线操作方式和DMA操作等功能，及其在PCI接口电路中的具体应用，从而提供了一种简便而高效的PCI接口电路实现方法。-This article describes a design based on the PCI interface, 500 MHz high-speed data acquisition system.The system uses high-speed FPGA and high-capacity memory buffering and storage of vast amounts of data in high-speed acquisition, and then I = l The circuit and the host communication through PCI. Also details the PCI9054 of PLX an advanced bus control function of the characteristics of bus operation and DMA operation, and its specific application in the PCI interface circuit, which provides a simple and efficient PCI interface circuit implementation.