described
共 162 篇文章
described 相关的电子技术资料，包括技术文档、应用笔记、电路设计、代码示例等，共 162 篇文章，持续更新中。
μC/OS-II Goals Probably the most important goal of μC/OS-II was to make it backward compatible with
μC/OS-II Goals
Probably the most important goal of μC/OS-II was to make it backward compatible with μC/OS (at least from an
application’s standpoint). A μC/OS port might need to be modified to work
This document provides guidelines for integrating a discrete high speed USB host controller onto a f
This document provides guidelines for integrating a discrete high speed USB host controller onto a fourlayer
desktop motherboard. The material covered can be broken into three main categories: Board
轨道交通系统中列车定位技术
<DD> 阐述了轨道交通列车定位技术。介绍了在轨道交通系统中列车定位技术的功能，国内外轨道交通中主要采用的列车定位方法，重点论述了几种主要定位技术，并从定位精度、闭塞制式、维护投资成本、抗干扰等方面进行分析比较。提出目前轨道交通定位技术应综合运用，取长补短，多种方法相互融合，才能满足轨道交通中对安全可靠性的要求。 </DD>
<DL class=en id=eabs>
<D
基于AT89C52单片机的步进电机控制系统设计
<P><STRONG>基于AT89C52单片机的步进电机控制系统设计</STRONG></P>
<P>摘 要: 提出了一个由<A href="http://www.elecfans.com/soft/78/223/2008/200806174199.html">AT89C52</A>单片机控制<A href="http://www.elecfans.com/article/87/98/2010/2
Control System of Stepp ingMot
提出了一个由AT89C52单片机控制步进电机的实例。可以通过键盘输入相关数据, 并<BR>根据需要, 实时对步进电机工作方式进行设置, 具有实时性和交互性的特点。该系统可应用于步进电机控制的大多数场合。实践表明, 系统性能优于传统的步进电机控制器。<BR>关键词: 单片机; 步进电动机; 直流固态继电器; 实时控制<BR>Con trol System of Stepp ingMotor Ba s
扩频通信芯片STEL-2000A的FPGA实现
针对传统集成电路（ASIC）功能固定、升级困难等缺点，利用FPGA实现了扩频通信芯片STEL-2000A的核心功能。使用ISE提供的DDS IP核实现NCO模块，在下变频模块调用了硬核乘法器并引入CIC滤波器进行低通滤波，给出了DQPSK解调的原理和实现方法，推导出一种简便的引入?仔/4固定相移的实现方法。采用模块化的设计方法使用VHDL语言编写出源程序，在Virtex-II Pro 开发板上成功
I2C slave routines for the 87L
The 87LPC76X Microcontroller combines in a small package the<BR>benefits of a high-performance microcontroller with on-board<BR>hardware supporting the Inter-Integrated Circuit (I2C) bus interface.<BR
MPC7400l零件号码规范说明
This document describes part number speciÞc changes to recommended operating conditions and revised electrical speciÞcations,<BR>as applicable, from those described in the general<BR>MPC74
谈集成电路的通用接口
<div>
Abstract: How can an interface change a happy face to a sad face? Engineers have happy faces when an interface works properly.Sad faces indicate failure somewhere. Because interfaces between mi
独特的IC BUFFER增强运算放大器设计
<p>
<span style="color: rgb(26, 24, 24); font-family: Arial, Helvetica, sans-serif; line-height: 15px; ">This note describes some of the unique IC design techniques incorporated into a fast, monolith
XAPP694-从配置PROM读取用户数据
<div>
This application note describes how to retrieve user-defined data from Xilinx configurationPROMs (XC18V00 and Platform Flash devices) after the same PROM has configured theFPGA. The method to a
基于单片机的汽车多功能报警系统设计
<P>基于单片机的汽车多功能报警系统设计<BR>The Design of Automobile Multi-function Alarming<BR>Based on Single Chip Computer<BR>刘法治赵明富宁睡达<BR>(河 南 科 技 学 院 ，新 乡 453 00 3)<BR>摘要介绍了一种基于单片机控制的汽车多功能报警系统，它能对汽车的润滑系统油压、制动系统气压、冷却
扩频通信芯片STEL-2000A的FPGA实现
针对传统集成电路（ASIC）功能固定、升级困难等缺点，利用FPGA实现了扩频通信芯片STEL-2000A的核心功能。使用ISE提供的DDS IP核实现NCO模块，在下变频模块调用了硬核乘法器并引入CIC滤波器进行低通滤波，给出了DQPSK解调的原理和实现方法，推导出一种简便的引入?仔/4固定相移的实现方法。采用模块化的设计方法使用VHDL语言编写出源程序，在Virtex-II Pro 开发板上成功
XAPP996-双处理器参考设计套件
<div>
This is the Xilinx Dual Processor Reference Designs suite. The designs illustrate a few differentdual-core architectures based on the MicroBlaze™ and PowerPC™ processors. The design
Reading and Writing iButtons v
Abstract: This application note explains the hardware of different types of 1-Wire® interfaces and software examples adapted to this hardware with a focus on serial ports. Depending on the types o
XAPP380 -利用CoolRunner-II CPLD创建交叉点开关
<p>
</p>
<div>
This application note provides a functional description of VHDL source code for a N x N DigitalCrosspoint Switch. The code is designed with eight inputs and eight outputs in ord
Replacement of NXP PCA9518 wit
The outputs of the PCA9518 are immediately available as soon as there is a voltage present on thesupply >~1V and behave as described above. The power-on reset of the PCA9518A keeps the outputsturne
NCV7356单线CANBUS收发器数据手册
The NCV7356 is a physical layer device for a single wire data link<BR>capable of operating with various Carrier Sense Multiple Access<BR>with Collision Resolution (CSMA/CR) protocols such as the Bosch
基于ATmega16的标记机控制系统
介绍了当前普通标记机控制系统现状及其存在缺点，给出气动标记机及相频修正PWM模式的工作原理。采用ATmega16单片机和USB转换RS232接口器件CH341T实现驱动控制系统与PC的实时通讯，标记控制系统可升级到USB接口。采用基于ATmega16的相频修正PWM替换555振荡电路产生的PWM，可直接通过软件调整PWM信号。使用达林顿三极管TIP122替代直流继电器驱动高频电磁阀，使得电磁阀驱动
一种8位单片机中ALU的改进设计
<P>文章提出了一种精简指令集8 位单片机中, 算术逻辑单元的工作原理。在此基础上, 对比传统PIC 方案、以及在ALU 内部再次采用流水线作业的332 方案、44 方案, 并用Synopsys 综合工具实现了它们。综合及仿真结果表明, 根据该单片机系统要求, 44 方案速度最高, 比332 方案可提高43.9%, 而面积仅比最小的332 方案增加1.6%。在分析性能差异的根本原因之后, 阐明了该