可编程逻辑器件cpld 和fpga 以及xilinx webpack 4.2 ISE 的介绍;用xilinxwebpack 4.2 ISE 设计七段译码器的显示. 关键词 ASIC Xinlinx Webpack4.2 ISE 七段译码器 abstract: Introduce PLD such as cpld and fpga as well as Xilinx 4.2 ISE software; Use Xilinx Webpack4.2 ISE to design display of seven-segment decoder. Keywords: ASIC Xilinx Webpack4.2 ISE Seven-Segment Decoder.