摘要： PCM检查器从外部总线RS－422或者总线ARINC429上接收串行数据，经过处理后按照指定格式通过DMA方式或者中断方式并行传送到PC存储器．详细描述了PCM检查器的功能，体系结构和自测试设计，并用FPGA加以实现，最后总结了一些有效利用FPGA资源的经验．

关键词: PCM, 现场可编程门阵列, 内建自测试

Abstract: The PCM tester receives external daia from RS-422 bus or ARINC429 bus. processes it and passes it to the memory of a per.sonil computer in DMA mode or interrupt mode according to the required format.This paper describes the function, architecture and the desigr for sclf-test of the PCM tester in detail, and gives an approach to implement it by Xilinx FPGA.Besides, at last it draws some conclusions about how to make good use of the feature of FPG A to improve a design.

中图分类号: 

• TP332.1