单片机控制ds18b20芯片的温度计 毕业论文设计.doc

单片机控制ds18b20芯片的温度计 摘 要 在学习单片机的过程中，通过做了一系列的实验，从而比较容易地领会了单片机哪些枯燥、难懂的专业术语，而且开发板弥补了市场上常见的单片机实验板的一些不足，有针对性地面向最终的实用控制功能，Abstract In the study process of MCU, By doing a series of experiments,So it can easier to understand which of the microcontroller’s boring and hard to understand terminology。And the design of microcontroller development board made up a common market’s microcontroller development board’s a number of inadequacies, targeted for the end of the practical control, So that the whole development board broken down into several small modules, And each module raises a number of pins, So that users can connect to their own needs according to the circuit.So you can use the MCU development board become more flexible.The MCU development board include: Minimum System of MCU,A / D circuit functional modules, D / A circuit functional modules, serial, 2-bit digital led control, drive a stepper motor circuit, 4 × 4 keyboard, LCD(1602) display, temperature measurement function modules, Speakers function modules and so on. Through the above function modules to complete the basic of MCU’s experiment. Keyword: Mcu development board, Module,Function, Experimental 目 录 1、引言……………………………………………………………………………………… 5 1.1课题的来源和意义……………………………………………………………5 1.2 国内外发展趋势………………………………………………………………6 1）低功耗CMOS化…………………………………………………………………微型单片化………………………………………………………………………主流与多品种共存……………………………………………………………　　……………………………………………………………8 2.1开发板功能描述……………………………………………………………… 8 2.2主控芯片介绍……………………………………………………………………8 2.3板载外围硬件设备与接口………………………………………………… 9 3、开发板硬件结构图……………………………………………………………………10 3.1开发板外观图……………………………………………………………………10 3.2 PCB板………………………………………………………………………………10 4、 6单片机主要模块芯片的介绍及使用………………………………………11 4.1 单片机最小系统……………………………………………………………………11 4.1.1 时钟源电路………………………………………………………………… 11 4.1.2 复位电路 ……………………………………………………………………11 4.2 A/D电路功能模块…………………………………………………………………12 4.2.1 ADC0809芯片介绍…………………………………………………………12 （1）ADC0809的内部逻辑结构………………………………………………（2）． ADC0809引脚结构…………………………………………………………………………………………………… 13 4.2.3 ADC0809模块电路