摘要
介绍了一种通过凌阳单片机SPCE061A的SPI接口进行键盘扩展的设计方案。该方案采用具有SPI接口的周立功智能显示驱动芯片ZLG7289进行键盘管理,其外围电路设计简单,使用方便,管理按键多。这种键盘设计占用I/O口资源少,应用广泛。文中给出了系统硬件电路设计图、软件流程图以及仿真结果。
This paper introduces a keyboard extending design scheme using the SPI of LingYang microprocessor. It realizes the management of keyboard by Zhou Li gong intelligent display chip ZLG7289 with SPI interface. The auxiliary circuit is simply-designed and easily-used, also it can manipulate many keys. This design occupies few I/O and can be widely used. The hardware circuit and flow chart of software as well as the simulation result are given in the paper.
出处
《电测与仪表》
北大核心
2007年第2期46-49,共4页
Electrical Measurement & Instrumentation
基金
国家自然科学基金项目(50407017)
