基于80x86CPU为核心控制器的具备基本I/O接口功能的硬件电路系统原理图设计、PCB电路设计和软件编程设计。基本I/O接口电路包括：锁存器、缓冲器、地址译码器、8255接口、8253接口、A/D（D/A）转换电路、串行接口电路等；软件功能要求完成基本I/O接口电路控制和串口通信功能调试。-Based on 80x86CPU as the core controller with the basic I/O interface function of the hardware circuit system schematic design, PCB circuit design and software programming. The basic I/O interface circuit includes: latch, buffer, address decoder, 8255 interface, 8253 interface, A/D (D/A) conversion circuit, serial interface circuit, etc .　software function requirements to complete the basic I/O interface circuit control and serial communication function debugging.