摘要
分析了TI公司的4路串行8位数/模转换器TLC5620的功能、特点、工作原理,提出了一种以芯片TLC5620和EPM3128为核心设计低频函数信号发生器的方法,给出了具体的硬件连接框图和软件设计流程图。利用该设计能产生正弦波、三角波、矩形波等,而且频率和占空比可调,频率控制档位数与占空比大小可以根据自己需要而设定,用EPM3128对键盘进行控制扫描,通过LED数码管显示出信号频率。本设计产生的信号频率在20～1000Hz,电路设计简单,可靠性高,使用灵活,具有很强的实用性,可以在教学与科研等很多场合应用。
Analysis of TI＇s 8-digit serial 4-channel D/A converter TLC5620 functions, features, working principle, put forward a TLC5620 and EPM3128 chip design at the core of low-frequency signal generator function method, are given specific Connection diagram of the hardware and software design flow chart. Use of the design can produce sine wave, triangle wave, rectangular wave,etc. , and adjustable frequency and duty cycle, frequency and duty cycle to control the size of the number of stalls can be set according to their own needs, and EPM3128 control of the keyboard scanning, through the LED digital tube shows that the signal frequency. The design of the signal frequency of 20-1000 Hz, simple circuit design, high reliability and flexible, and highly practical, in teaching and scientific research applications, and many other occasions.
出处
《电子测量技术》
2009年第6期102-104,共3页
Electronic Measurement Technology
