摘要
硬件以AT89C55WD单片机为核心,由键盘和LED显示电路、单片机系统、控制信号隔离输出电路、PT100热电阻AD转换电路等几部分组成。采用ICL 7135与单片机的串行接口电路,可大大节约CPU的接口资源,简化电路设计,AD转换精度高,对单片机设计人员具有一定的参考意义。
The hardware is based on AT89C55WD. It is composed of keyboards,LED display circuit,the system of single-chip microcomputer,the isolated output of control signs, the sensor of PT100 and it＇s AD converter circuit.The application of single chip is connected with ICL7135 by serial interface,which saves the Interfaces of CPU, simplify design and the AD converter precision is high. It has certain significance to the designer of SCM.
出处
《自动化技术与应用》
2011年第12期84-86,89,共4页
Techniques of Automation and Applications
关键词
单片机
AD转换
分频器
温度控制
single-chip microcomputer
AD converter
frequency divider
temperature control
