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说明：  这是关于8路模拟开关CD4051芯片的代码，代码很简单，经过测试，完全可以在程序中使用，(this is about the analog chip CD4051,the code is very easy,so you can use it in you program.)

4层电路板阻抗匹配总结，基于si9000 推荐借鉴(PCB Impedance matching)

串口与pc机通讯，51单片机例程，只需要修改io口即可实现。(Serial communication with pc, 51 MCU routine, you only need to modify the io port can be realized.)

c8051f的tcpip源程序,新一代功能比较齐全的c8051f020单片机的串行通信c程序,通用的c8051系列tcpip源程序，同时包括了ucos的移植。 (c8051f the tcpip source, a new generation of relatively complete functional C8051F020 MCU serial communication c procedures, C8051 Series tcpip common source, at the same time includes uCOS transplant.)

[2005最新C++经典著作].John.Wiley.and.Sons.You.Can.Do.It.A.Beginners.Introduction.to.Computer.Programming.eBook-DDU([2005 C latest classics]. John.Wiley.and.Sons.Yo u.Can.Do.It.A.Beginners.Introduction.to. Computer.Programming.eBook- DDU)

msp430的中文手册，原理图，示例程序，来自合肥工业大学，请勿用于商业用途(Chinese manual, schematic diagram, sample program of msp430, from Hefei University of Technology, please do not use for commercial purposes)

用51单片机IO口实现SMBUS总线的源程序(With 51 single-chip IO Bus I realize SMbus source)

交通信号控制,适用于51单片机芯片上，运行环境为visual C(Traffic signal control, suitable for 51 MCU chip, the operating environment for the visual C)

说明：  ISO15031诊断说明 适用于测试以及研发人员(ISO15031 Diagnostic Instructions for Testing and R&D Personnel)

关于单片机的芯片手册，希望对大家有用，尤其是初次接触这款芯片的(About the chip Manual of single chip computer, I hope it will be useful to you all.)