摘要
从实际的开发项目入手,分析了5V系统与3.3V系统在通信和控制时存在的逻辑电平不匹配的问题.讨论了在不同供电电压的系统之间,如何应用电平转换器实现信号输入/输出逻辑电平上的兼容,并介绍了所用电平转换器的设计原理和整体方案.实践证明,由于合理地采用了电平转换器,系统内信号传输可靠,从而很好地解决了混合电压逻辑系统接口的兼容性问题.
From the actual development project, this paper analyzed the logic level unmatched matters between 5V system and 3.3V system when they communicated with each other. To solve these matters, it discussed how to utilize the level translators to realize signal input/output logic level compatibility between the different power voltage system, and also introduced the design principles and overall plan about level translators. By use of level translators, it made the signal transmission reliable and could well solve the port compatible question of mix voltage logical system.
出处
《宁夏工程技术》
CAS
2005年第3期247-250,共4页
Ningxia Engineering Technology
关键词
逻辑电平
匹配
电平转换器
logic level
unmatched
level translator
