键盘扫描算法有很多中，这个程序在IAR编译器下，用C语言描述了其中一种算法...

芯片PCF8951共有四个A/D输入通道：AD0，AD1，AD2，AD3,分别与四个电位器(R1,R2,R3,R4)连接，用以调节电位器的输出电压。其中AD0通道既可测量电位器输出电压，也可用于测量从J1插座输入的外接电压，须用开关J2加以选择。J4插座提供由PCF8591输出的时钟方波信号。SAA1064驱动四个数码管显示一路AD转换后得到的数据。-PCF8951 chip, there are four A/D input channels: AD0, AD1, AD2, AD3, respectively, with four potentiometers (R1, R2, R3, R4) connected to regulate the output voltage potential. AD0 channel which can be measured potentiometer output voltage can also be used to measure the input from the J1 socket external voltage, to be used to select switch J2. J4 socket output from the PCF8591 clock square wave signal. SAA1064 drivers of four digital display along after AD conversion data.

用汇编程序编写的音乐控制 系统可以选择将近40首歌-procedures used to prepare a compilation of music control system can choose to nearly 40 songs

C51源代码，驱动74164》，这个程序太简单了，不过省得大家自己写了-C51 source code, drive 74164

单片机AT90S系列 制作简易USB接口（软件模拟,无usb硬件）。doc- Monolithic integrated circuit AT90S series manufacture simple USB connection (software simulation, non- usb hardware). Doc

51单片机的KEIL操作函数库，这个资料看完了，那么KEIL开发51的使用也差不多了。-51 SCM KEIL operation library, read this information, then use the KEIL development of 51 should be enough.

双机通信过程中采用点对点通信的从机部分示例-Two-machine communication process used in point-to-point communications from the machine part of sample

它是关于单片机与温度芯片DS18B20的资料，通过单片机采集芯片DS18B20温度-It is a single-chip microcomputer with on-chip temperature DS18B20 information collected through the single-chip-chip temperature DS18B20

STC单片机AD的实现加8位595串行数码管显示-STC Single-chip realization of AD plus 8 595 serial digital tube display

atmega128串口通信程序，与PC机通信的驱动-atmega128 serial communication program, and PC communication drivers

这是NEC系列单片机教材及应用,解压密码是:www.pp51.com-This is the NEC MCU materials and applications, extract the password is: www.pp51.com