8279芯片的键盘显示接口分析及其驱动电路设计

Keyboard Display Interface Analysis and Driving Circuit Design of 8279 Chip

在对８２７９ 的键盘显示接口分析的基础上，设计实现一位ＬＥＤ 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ＬＥＤ 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．

This article introduces a circuit used to implement 16\|bit seven\|segment decimal LED displayer and keyboard input array, which is designed on the base of the analysis of 8279 keyboard display interface. By using 8279 chip it can scan keyboard and displayer automatically, so as to relieve CPU of burden. This circuit displays steadily, and its program is rather easy, so it will not fail in processing. This system adopts the display interface of 8031 and 8279 chip to compose the display driving circuit of LED display application system. It has the characteristics of high reliability, low price and easy to use, so it is adapted for computer systems used to do data display.