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无刷直流电动机需要多种电压电平来控制转速：0V 使电动机停转，5V 使电动机以最大转速运转，而在0V和5V之间的电压则使电动机以较低的转速运转-The needs of a wide range of brushless DC motor voltage level to control the rotational speed: 0V stop the motor switch, 5V maximum speed of the motor running, and in between 0V and 5V voltage while the motor running at low speed

]本文介绍了如何利用CPLD(复杂可编程逻辑器件)与单片机的结合实现并行I／ O(输入／输出)接口的扩展。该设计与用8255做并行I／O接口相比，与单片机软件完全兼容， 同时拥有速度快，功耗低，价格便宜，使用灵活等特点-] This article describes how to use the CPLD (complex programmable logic device) and the single-chip combination to achieve parallel I/O (input/output) interface expansion. The design and use 8255 to do parallel I/O interface as compared with the single-chip software is fully compatible at the same time have a fast, low power consumption and cheaper prices, the use of flexible features such as

开发enum软电话的一个必然备用的东东，大家研究一下-development of a soft phone will reserve the Eastern, we look at

tlp521-4资料-tlp521-4 data

Description Calculate a+b Input Two integer a,b (0

[FIF]ASP互动视频VIP教程下载4.1.3程序流程图-[FIF] ASP interactive video tutorials download VIP program flowchart .1.3

短路潮流计算软件帮助系统，可以配合短路潮流计算软件使用-power help

delphi编写的程序更新,查找update.ini并下载更新程序~!-delphi procedure for the preparation of updated update.ini search and download the update ~!

用C语言实现的闹钟程序.rar- Alarm clock procedure realizes which with the C language rar

DSP281x_PieVect中断向量表源程序-DSP281x_PieVect interrupt vector table source code