eagle circuit for MP3 expander

示例程序下载关于单片机接上-download examples of SCM connected

STC89C51RCRD系列内部EEPROM数据存储（C语言）说的可是天主教单片机啊！

P87C591的a/d 转换程序，可在keil 51下调试运行，也可将其参数修改后作为函数使用。-P87C591 the a/d conversion, in the next 51 c51 debugging operation, but also its parameters can be modified as a function use.

本代码基于凌阳SPCE061A芯片，实现波形发生器功能，能实现波形包括正弦波、方波、三角波、锯齿波，外括数码管显示，语音报数据的功能。-Based on this code SPCE061A Sunplus chips, realize waveform generator function, can realize waveforms including sine wave, square wave, triangle wave, sawtooth, outside, including a digital display, voice, data reported.

模拟pwm实现灯的亮度，通过调节其输入脉冲的占空比来实现灯闪烁不是很明显又能看到亮度变化的功能-Analog pwm realize the brightness of lights, by adjusting the input pulse duty cycle to achieve blinking lights is not very obvious to see the brightness can change the function of

LED驱动，简单通俗，易懂对初学者来说比较合适-LED driver, a simple pop and easy to understand and more suitable for beginners

C8051F020串口程序，波特率96-C8051F020 serial procedures, baud rate 9600

一个用C51编写的倒计时程序，可通过PC传送起始时间，也可回传当前时间。比较简单-C51 with a countdown of the preparation process, through PCs starting time, but also back- the present time. Relatively simple

c8051f020 pca 的简单应用程序-c8051f020 pca simple application

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