The program design of multi-layer keyboard in intelligent instruments are illuminated through introducing keyboard status transfer diagram, keyboard program status table, status input address pointer table and analysis program status table.

• 摘要复杂智能仪表的功能丰富、参数繁多，经常用状态分析法来分析设计键盘程序，文中通过实例介绍键盘状态转移图、键盘程序状态表、状态入口地址指针表和分析程序状态表的设计来具体说明智能仪表中多层次键盘程序设计。