The design of programming parallel interface 8255 based on CPLD are introduced, give the figure of the parallel interface, achieve function of mode 0 for 8255 by AHDL, and simulate the result.

• 介绍了一种基于CPLD的可编程并行接口芯片8255的设计,给出了并行接口的系统框图,通过AHDL语言实现了8255方式0的功能,并仿真了结果。