串口扩展芯片，可以扩展单片机的串口，使单片机的串口由一个变为3个甚至更多，降低成本。...

用AT89C2051实现程序A/D转换程序，用PWM模拟输出。-Procedures using AT89C2051 realize A/D conversion process, using PWM analog outputs.

利用多模式调制解调器芯片CMX868能直接通过高速串行总线与单片机串行接口进行通信这一特点设计的一套采用单片机来控制CMX868芯片的数据传输系统，握手协议部分-The use of multi-mode modem chip CMX868 directly by high-speed serial bus and the microcontroller serial interface to communicate with this feature set designed to use microcontroller to control the CMX868 chip data transmission system, part of the handshake protocol

万年历 megal128 iccavr开发平台-Calendar megal128 iccavr development platform

单片机的C语言编程应用开发程序 十分有用哦很好 的 -SCM C programming language application development process very useful oh we

这是Beagle_Allegro_B 板子的PCB图，供大家画图时参考使用-This is the PCB board Beagle_Allegro_B map, drawing reference to use for everyone

可用于PIC单片试验用，12M晶振，形成10毫秒中断 第一次上传东西，试试看，-PIC chip can be used to test, 12M crystal, the formation of the first 10 ms interruption upload things, give it a try,

使用键盘上的上、下、左、右四个按键，可以分别控制led1,2,3,4, 每个LED 对应的Port 请参考“实验平台介绍”说明文档。要求按下 上面提到的四个按键中间的一个按键后，该按键对应的led 被点亮，持续1 秒钟以后led 熄 灭。-Use the keyboard on the upper and lower, left, and right buttons, can control led1, 2,3,4, each LED corresponding to the Port, please refer to " experiment on" documentation. Requirements of the four above-mentioned press the middle button of a button, the button that corresponds to being light led, continuous 1 second later led out.

采用Maxim公司的Max267芯片实现的滤波电路 欢迎下载-using Maxim"s Max267 chip welcome the filter circuit download

一个关于液晶的单片机例程，和液晶的资料，很有启发意义的。做液晶时可供参考。-an LCD on the MCU routines, and LCD information, the significance is very enlightening. So when the LCD for reference.

DS1302HT1302实时时钟与89C2051接口子程序