C8051F020 realize four production UART port

此为友善之臂micro2440开发板的使用手册，更新时间是2009年2月28日。-This is a friendly arm on the development board micro2440 user" s manual, update time is February 28, 2009.

s系列的51单片机的看门狗的c语言include库 可以用它轻松使用看门狗，内函驱动函数FeedDog（）-s series of 51 single-chip watchdog of the c language include the Treasury can use it easy to use watchdog, within the letter of drive function FeedDog ()

无线传感器网络-构建与协议,讲解无线传感器网络的主要构建及各层的协议实现.-Wireless sensor networks- Construction and agreement, on wireless sensor network to build and realize the agreement on each floor.

51系列单片机实验课程：按键显示程序 （在数字键上按数字，在液晶显示器上显示）-51 Series single-chip experimental curriculum: key display program (in the figure by the number keys on the LCD display)

英飞凌C166之XC164CS的IO读写操作程序-Infineon C166 of the IO to read and write operating procedures XC164CS

一本很好的书，关于介绍如何学好单片机的书！ 很适合初学者看哦！-IT is a good book about how to learen the MCU!

DS1302实时时钟的MSP430单片机底层驱动程序 -DS1302 Real Time Clock Driver MSP430 Singlechip bottom

电子屏字符显示器程序-electronic display screen characters procedures

单片机P1口与4个按键连接，用于信号幅度和频率调节操作键。单片机P0、P2.7、P3.6(-WR)与DA0832、2个741(运放)连接构成波形信号输出电路。 编程使波形信号输出电路输出正弦波信号，并且可通过操作键调节信号的幅度和频率。幅度和频率调节级别从0~10，共11个等级。 -Singlechip P1 I connect with the four buttons for the signal amplitude and frequency adjustment operation keys. Singlechip P0, P2.7, P3.6 (-WR) and DA0832, 2 months 741 (operational amplifier) to connect constitute waveform signal output circuit. Programming so that waveform signal output circuit output sine wave signal, and can be operated keys adjust the signal amplitude and frequency. Amplitude and frequency adjustment level from 0 ~ 10, a total of 11 grades.

MCS-51单片机实用子程序库1，WORD文档-MCS-51 microcontroller practical for a subroutine, the Word document