一些实用的51单片机接口源程序，里面附有文档说明，很好的开发参考资料...

此程序为AD9850（DDS）直接数字频率合成器C语言源码。用125M的有源晶振，频率无失真输出可达到40M。该程序包括FYD12864LCD显示程序加4X4矩阵键盘扫描，可步进1M，1K，和任意频率输入。及相位设置。-This procedure for the AD9850 (DDS) Direct Digital Frequency Synthesizer C language source code. With 125M active crystal, the frequency output can be achieved without distortion 40M. The process includes the display program FYD12864LCD plus 4X4 matrix keyboard scanning, may be stepping 1M, 1K, and arbitrary frequency input. And phase settings.

WINBOND的W21C512的存储器管脚图，对此存储器的一些参数性能指标-WINBOND W21C512 memory of pin maps, this memory of some of the parameters of performance indicators

矢量变频器实现源码,用日本瑞莎单片机实现,具极强的实用价值-Vector frequency converter source code, with Japan" s Renesas MCU implementation, with strong practical value

44键盘多模块演示程序，使用双向双次键扫描技术LCALL INKEY 双向双次键扫描-keyboard module demonstration, the use of the bi-directional bonding time scanning technology LCALL INKEY meeting of the bi-directional scanning Bond

键盘和单片机，电脑通信，功能虽然简单，但是理解起来很容易-Keyboard and single-chip, computer communications, features, while simple, but it is easy to understand

CF8051F040开发板的 Delay程序-Delay of CF8051F040 development board procedures

基于凌阳系列单片机的LCD501液晶驱动程序，已在SPCE61上调试通过-Sunplus based MCU Series LCD501 LCD driver, has been adopted in SPCE61 debugging

STC12C5410/STC12C5410AD 系列 PWM输出。 采用汇编语言编写，详细注释说明。-PWM output STC12C5410/STC12C5410AD series. Using assembly language to prepare detailed notes.

使用Virelog编的一个pwm程序，简单易懂，适合初学者参考-Use Virelog compiled a pwm program, easy to understand for beginners reference

1602液晶时钟，带仿真-1602 LCD clock, with simulation