The intelligent instrument with a singlechip of 89C51 and a chip 8155 realize the oscular minimum hardware design technique for keyboard/display and printers .

• 讨论在以89C51单片机为微处理器的智能化仪表中采用一片8155实现智能仪表、键盘/显示器及打印机接口的最小化硬件设计技术。