pt2240 Datasheet only.

51单片机简单操作系统源码，其他地方下的，可能拿来分析分析，学习学习-51 microcontroller simple operating system source code, under other parts of the analysis may be used to analyze, study learning

多种实时时钟芯片的读写应用程序，所用控制器为MCS-51系列的单片机-multiple real-time clock chip to read and write applications, using controller for the MCS-51 microcontroller series

32位arm9微处理器S3C2410的定时器测试源代码-32-bit ARM9 microprocessor S3C2410 timer test source code

超声波测距，C语言，AT89S52,keil3通过-Ultrasonic Ranging

8051单片机控制Max7221实现动态显示数据-8051 Dynamic control of display data Max7221

AVR定时器功能 定时器每秒加一,0到255循环,通过数码管显示计数值-AVR timer function Timer per second, plus one, 0 to 255 cycles, through the LED display counts

51单片机与12864LCD接口C源程序代码-51 Microcontroller Interface C source code with the 12864LCD

这个文件是ATMEGA8的实验板原理图，大家可以下载，在我们公司已经使用，至今效果还可以，大家下载。-This document is ATMEGA8 schematic diagram of the experimental board, everyone can download, in our company have been used and the result also can download the U.S..

我老师为上课开发的单片机测试源程序，怎么可能“文件已存在”？-my teacher for the class of MCU development test program, how likely "file already exists?"

基于NRF905无线收发模块的无线按键程序-NRF905 wireless transceiver module based on the wireless key procedures