在对8279的键盘显示接口分析的基础上,设计实现一位L ED七段十进制数码管显示驱动和键盘输入阵列电路.利用8279可实现对键盘显示的自动扫描,以减轻CPU负担.其显示稳定,程序简单,不会出现误动作. 本系统采用8031单片机与8279芯片的显示接口组成对L ED数码管应用系统的显示驱动电路. 具有可靠性高、价格低、使用方便等特点,适合数据显示的计算机应用系统使用-On the basis of the analysis on the 8279 keyboard interface, design and implementation of an L, ED, seven-segment decimal digital display driver and keyboard input array circuit. Use 8279 automatically scans the keyboard and display, in order to reduce the burden on the CPU. Display stable, the program will not malfunction. the 8031 microcontroller and 8279 display interface composition application system L, ED, digital tube display driver circuit with high reliability, low price, easy to use, suitable for data displaycomputer applications use