一个单片机的原理图啊 ，用protel打开。网上当的

nRF9e5开发例程，是一套完整的程序代码，需要的可以看看。-nRF9e5 development of routines, is a complete set of program code, need to take a look at.

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.

8051 LED Sample Code

基于C8051F340的AD转换和1602液晶显示的测试小程序-Based on the C8051F340 of AD conversion and 1602 LCD test applet

单片机仿真51设计1.洗衣机控制C语言版-Single-chip simulation) design. Washing machines control the C language version

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.

一个凌阳单片机多中断源的实际例子,很具有代表意义,值得研究哦-Sunplus more than a single-chip interrupt sources of practical examples, it is with the representative of significance, worthy of study Oh

流水灯：灯从最低位P0.0开始向高位依次点亮-Water lights: lights from the lowest to the highest followed by P0.0 lit

mathacad laboratore usings sdk

c8051FXXX系列单片机开发工具 PDC U-PDC U-EC 使用手册，及IDE KEILC 使用方法，供初始C8051F的人员使用-c8051FXXX Series MCU Development Tools PDC U-PDC U-EC the use of manuals, and IDE KEILC use for the initial use of the C8051F