PCF8563时钟芯片驱动89C51

该头文件配合key.c，在main函数中调用key.c，都文件中添加key.h，使软件更清晰，一目了然-The header file with key.c, in the main function call key.c, all files add key.h, so that software is more clear at a glance

max197采样程序,采用STC89C52RC单片机-MAX197 sampling procedures STC89C52RC Singlechip

AV系统数字调谐PLL频率合成器的单片机控制 文章利用LC7218PLL频率合成器在AV领域的电调谐功能,提出了一个TV/FM/AM全景接收机设计方案,重点设计分析了LC7218与单片机之间的I/O数据结构,显示了它优良的性能。-AV system PLL digital tuning of the single-chip frequency synthesizer to control the use of article LC7218PLL frequency synthesizer in the AV field of electrical tuning function, a TV/FM/AM panoramic receiver design programs that focus on design and analysis of the LC7218 and MCU between the I/O data structure, demonstrated its excellent performance.

这是我画的步进电机通用的驱动板，当然只是应用到初学者，版胡德不是很好，希望大家多多指教。-This is my painting of the stepper motor drive GM board, of course, only applied to the beginner, not a very good version of Ehud, I hope everyone exhibitions.

单片机应用程序集，含PIC elong 等-SCM application sets, as with PIC elong

详细的RF非接触卡测试源码，详细的备注。-Detailed RF test source of non-contact cards, detailed Remarks.

修改后的PDIUSBD12完整固件源码，实现51单片机的USB接口，完全通过测试。-revised PDIUSBD12 integrity of the firmware source code, achieving 51 SCM"s USB port and fully tested.

fm1702 13.56m rfid 读卡程序-fm1702 13.56m rfid reader program

ModBus通信参考程序，Keil编译，学习ModBus的好工具-ModBusx protocol simulation, study well the instrument ModBus

秒表C51程序，包含键盘扫描， 在数码管上显示各个数字， 使用80C51单片机-stopwatch C51 procedures, keyboard scanning, digital control in the various figures show that the use of 80C51 microcontroller