To this day, Power over Ethernet (PoE) continues to gainpopularity in today’s networking world. The 12.95Wdelivered to the Powered Device (PD) input supplied bythe Power Sourcing Equipment (PSE) is a universal supply.Each PD provides its own DC/DC conversion from anominal 48V supply, thus eliminating the need for a correctvoltage wall adapter. However, higher power devicescan not take advantage of standard PoE because of itspower limitations, and must rely on a large wall adapteras their primary supply. The new LTC4268-1 breaks thispower barrier by allowing for power of up to 35W for suchpower-hungry 2-pair PoE applications. The LTC4268-1provides a complete solution by integrating a high powerPD interface control with an isolated fl yback controller.
上传时间： 2014-12-24
上传用户：jasson5678
介绍了基于单片机C8051F020的通用串口适配器的设计与实现方法，即由单片机控制的智能化一对多口收发信号转换器。通过采用C51对单片机进行编程，控制与RS-232（标准RS-232电平）、RS232(TTL电平)、RS-422接口的数据通信；采用C++ Builder作为开发平台，通过RS-232接口实现上位机对适配器各个通信端口的控制。 Abstract: Design and realization of a universal serial port adapter based on the MCU C8051F020 are introduced.The adapter is an intelligent one-to-more receiving and transmitting signal converter controlled by the MCU. By programming the MCU with the language C51,MCU control data communication between the MCU and RS-232(RS-232 level),RS-232(TTL level),RS-422 port; Using C++ Builder as the development plane, by one RS232 port, the upper PC can control each of the communication port of the adapter.
上传时间： 2013-11-19
上传用户：hebanlian
keil c51 v9.01此版不是汉化中文版，是英文版来的。ARM发布Keil μVision4集成开发环境(IDE)，用来在微控制器和智能卡设备上创建、仿真和调试嵌入式应用。 μVision4 IDE是为增强开发人员的工作效率设计的，有了它可以更快速、更高效地开发和检验程序。通过μVision4 IDE中引入的灵活的窗口管理系统，开发人员可以使用多台监视器，在可视界面任何地方全面控制窗口放置。 新用户界面可以更好地利用屏幕空间，更有效地组织多个窗口，为开发应用提供整齐高效的环境。 μVision4在μVision3的成功经验的基础上增加了：* System Viewer (系统查看程序)窗口，提供了设备外围寄存器信息，这些信息可以在System Viewer窗口内部直接更改。* Debug Restore Views (调试恢复视图)允许保存多个窗口布局，为程序分析迅速选择最适合的调试视图。* Multi-Project Workspace(多项目工作空间)为处理多个并存的项目提供了简化的方法，如引导加载程序和应用程序。* 为基于ARM Cortex 处理器的MCU提供了Data and instruction trace(数据和指令追踪)功能。* 扩展了Device Simulation(设备仿真)功能以支持许多新设备，如Luminary、NXP和东芝生产的基于ARM Cortex-M3处理器的MCU；Atmel SAM7/9；及新的8051衍生品，如Infineon XC88x和SiLABS 8051Fxx。* 支持许多debug adapter interfaces(调试适配器接口)，包括ADI miDAS Link、Atmel SAM-ICE、Infineon DAS和ST-Link。
上传时间： 2013-10-31
上传用户：qingdou
基于单DSP的VoIP模拟电话适配器研究与实现:提出和实现了一种新颖的基于单个通用数字信号处理器(DSP)的VoIP模拟电话适配器方案。DSP的I/O和存储资源非常有限，通常适于运算密集型应用，不适宜控制密集型应用[5]。该系统高效利用单DSP的I/O和片内外存储器资源，采用μC/OS-II嵌入式实时操作系统，支持SIP和TCP-UDP/IP协议，通过LAN或者宽带接入，使普通电话机成为Internet终端，实现IP电话。该系统软硬件结构紧凑高效，运行稳定，成本低，具有广阔的应用前景。关键词：模拟电话适配器；IP电话；数字信号处理器；μC/OS-II 【Abstract】This paper presents a VoIP ATA solution based on a single digital signal processor (DSP). DSPs are suitable for arithmetic-intensiveapplication and unsuitable for control-intensive application because of the limitation of I/O and memory resources. This solution is based on a 16-bitfixed-point DSP and μC/OS-II embedded real-time operating system. It makes good use of the limited resources, supports SIP and TCP-UDP/IPprotocol. It can connect the analog telephone to Internet and realize the VoIP application. This system has a great future for its high efficiency andlow cost.【Key words】Analog telephone adapter (ATA); Voice over Internet protocol (VoIP); Digital signal processor (DSP); μC/OS-II Research and Implementation of VoIPATA Based on Single DSP
上传时间： 2013-11-20
上传用户：Wwill
MAXQUSBJTAGOW评估板软件:关键特性 Easily Load and Debug Code Interface Provides In-Application Debugging Features Step-by-Step Execution Tracing Breakpointing by Code Address, Data Memory Address, or Register Access Data Memory View and Edit Supports Logic Levels from 1.1V to 3.6V Supports JTAG and 1-Wire Protocols Each adapter Has Its Own Unique Serial ID, Allowing Multiple adapters to be Connected Without COM Port Conflicts Has In-Field Upgradable Capability if Firmware Needs to be Upgraded Enclosure Protects from Shorts and ESD
标签： MAXQUSBJTAGOW 评估板 软件
上传时间： 2013-10-24
上传用户：teddysha
superpro 3000u 驱动 PIC16C65B@QFP44 [SA245] PIC16C65B: Part number QFP44: Package in QFP44 SA245: adapter purchase number AM29DL320GT@FBGA48 [SA642+B026] AM29DL320GT: Part number FBGA48: Package in FBGA48 SA642: adapter purchase number (Top board with socket) B026: adapter purchase number (Bottom board, exchangable for different parts) 87C196CA@PLCC68(universal adapter) [PEP+S414T] 87C196CA: Part number PLCC68: Package in PLCC68 universal adapter: this adapter is valid for all parts in this package PEP: The PEP (Pin-driver Expansion Pack necessary to work with the adapter S414T) S414T: adapter purchase number (Universal for all parts in this package) S71PL127J80B@FBGA64(special adapter) [(SA642A-B079A-Y096AF001)] S71PL127J80B: Part number FBGA64: Package in FBGA64 special adapter: this adapter is valid for this
上传时间： 2013-10-23
上传用户：Avoid98
MAXQUSBJTAGOW评估板软件:关键特性 Easily Load and Debug Code Interface Provides In-Application Debugging Features Step-by-Step Execution Tracing Breakpointing by Code Address, Data Memory Address, or Register Access Data Memory View and Edit Supports Logic Levels from 1.1V to 3.6V Supports JTAG and 1-Wire Protocols Each adapter Has Its Own Unique Serial ID, Allowing Multiple adapters to be Connected Without COM Port Conflicts Has In-Field Upgradable Capability if Firmware Needs to be Upgraded Enclosure Protects from Shorts and ESD
标签： MAXQUSBJTAGOW 评估板 软件
上传时间： 2013-11-23
上传用户：truth12
superpro 3000u 驱动 PIC16C65B@QFP44 [SA245] PIC16C65B: Part number QFP44: Package in QFP44 SA245: adapter purchase number AM29DL320GT@FBGA48 [SA642+B026] AM29DL320GT: Part number FBGA48: Package in FBGA48 SA642: adapter purchase number (Top board with socket) B026: adapter purchase number (Bottom board, exchangable for different parts) 87C196CA@PLCC68(universal adapter) [PEP+S414T] 87C196CA: Part number PLCC68: Package in PLCC68 universal adapter: this adapter is valid for all parts in this package PEP: The PEP (Pin-driver Expansion Pack necessary to work with the adapter S414T) S414T: adapter purchase number (Universal for all parts in this package) S71PL127J80B@FBGA64(special adapter) [(SA642A-B079A-Y096AF001)] S71PL127J80B: Part number FBGA64: Package in FBGA64 special adapter: this adapter is valid for this
上传时间： 2014-03-27
上传用户：ippler8
设计模式，adapter,bridge,chain
标签： 设计模式
上传时间： 2014-01-19
上传用户：qunquan
该文件是多层体系结构的数据访问层，它使用工厂模式、adapter模式，封装了NHibernate，提供基本CRUD接口。想利用NHibernate实现ORM的兄弟们，冲啊！
上传时间： 2015-05-19
上传用户：wangdean1101
