低电压检测. A口低8位接键盘列线，键盘行线接VDDIO；B口高8位接LED // 按K1键 低电压为2.4v // 按K2键 低电压2.8v...

程序能够实现将十二位的二进制数5V对应fffH变换成一路0~5V的电压。 精度方面：在使用时上下波动范围大约是0~2fH能保证高位寄存器准确； 调试过程中遇到了一系列问题：（1）p0口的使用需接上拉电阻，内部没有带电阻；（2）调试的过程最好使用单步运行，以便于察看寄存器的内容；（3）对系统板不熟悉，一些硬件方面容易出问题，像口连接，电源、地的连接。（4）直流电源使用不准确，内部的各个电源输出是独立的，需要共地。 -procedures to achieve 12 to a binary number 5V counterparts fffH transform all the way into the 0- 5V voltage. Accuracy : the use of fluctuating ranges of 0 ~ 2fH can guarantee accurate high register; debugging process encountered a series of questions : (1) p0 I need to connect to the widening use of resistance, with no internal resistance; (2) the process of commissioning the best use of single-step operation, in order to inspect the contents of Register; (3) The right not familiar with the system board, Some hardware problems are likely to occur, such as connectors, power, and connectivity. (4) DC power supply use of inaccurate, all within the Power output is independent, to the total needs.

用89C2051产生PWM信号控制直流电机调速-89C2051 generated by PWM signal to control DC motor speed control

LPC214x开发SD卡详细资料，包含源程序-LPC214x development SD card detailed information, including source

AVR单片机解码普通PC键盘码值，解码后通过串口发送到电脑上显示-tiao shi tong guo

nokia3310多功能温度计设计，显示介面随温度变化，可定时测量-Design of multi-function thermometer nokia3310, showing the interface with temperature change can be measured from time to time

在89C51上实现TCPIP协议-89C51 in achieving agreement TCPIP

这是一段开始学单片机时写的LCD程序，基于普通的51单片机，在KEIL环境上开发的。-This is a period of time began to study single-chip LCD written procedures, based on the ordinary single-chip microcomputer 51, in KEIL environment developed.

at89s51小系统（带有LCD），用来测试系统及LCD显示的程序，有一定的代表性，可在上面作更改，作为开发的参考资料-AT89S51 small system (with LCD), to test the system and the LCD display procedures, a certain level of representativeness can be changed in the above, as the development of reference materials

四位数码管显示的数码管用的51单片机的C语言时钟程序-Four digital display digital works 51 MCU clock C language program

64输入32输出单片机程序-64 input 32 output SCM procedures