摘要
采用普通的74HC系列芯片,采用分时工作方式,设计低成本的单片机串行端口扩展电路。经实践证明,电路工作可靠、稳定。
74HC series chip and time division work mode are used and a cheap serial expander of MCU is designed. Practices show that the circuit has advantages of reliable and stable.
出处
《自动化应用》
2013年第4期21-22,25,共3页
Automation Application
