⒈ 了解交通灯管理的基本工作原理

⒉ 熟悉8259中断控制器的工作原理和应用编程

⒊ 熟悉8255并行接口的各种工作方式和应用

⒋ 熟悉8253计数器/定时器的工作方式及应用编程，掌握利用软硬件相结 合定时的方法

⒌ 掌握多位LED显示问题的解决

-But understand the basic principle of management of traffic

The 8259 interrupt controller with the working principle and application programming

3 8255 parallel interface with various working mode and application

The familiar 8253 counter/timer way of working and application programming, using hardware and timing of the guitar

More than ⒌ master LED display problems