很好的AT89C2051的中文说明书 费了很大劲才找到的

440BX开发板 LED显示测试 试验程序-440BX Development Board LED tests procedures

单片机系统中的红外通信接口-SCM system of infrared communication interface

这是i Button这种信息纽扣所采用的1线通讯方式的完整源程序。-This is the information i Button Button 1 line used in the complete source code means of communication.

利用51单片机做的USB 应用实例，可模拟三键滚轮鼠标，KEIL开发-use USB MCU do application, can simulate three key wheel mouse, development KEIL

用8051汇编编程的定点，三字节浮点，四字节浮点的字程序库。-8051 compilation of programming with the fixed-point, three-byte floating-point, four-byte floating-point library word.

存储器 24c04 eeprom 51系列 汇编的源代码-Memory 24c04 eeprom 51 Series compilation of source code

本程序是功能是实现51单片机与PC机之间的通信，程序简单-this is to tell how to use 51 single chip controler to communicate with pc

单片机的同步/异步通信，包括发送部分程序、接收部分程序、主控制程序，针对不同单片机，有着极高的学习意义-Single-chip synchronous/asynchronous communication, including sending some of the procedures, to receive some of the procedures, the main control program, for different single-chip, has a very high significance of the study

C8051F04x单片机SMBUS的应用。-C8051F04x Singlechip SMbus applications.

sanDisk sd卡标准协议手册，很好的资料-sanDisk sd card standard protocol manual, very good information