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The TJA1051 is a high-speed CAN transceiver that provides an interface between aController Area Network (CAN) protocol controller and the physical two-wire CAN bus.The transceiver is designed for high-speed (up to 1 Mbit/s) CAN applications in theautomotive industry, providing differential transmit and receive capability to (amicrocontroller with) a CAN protocol controller.
標(biāo)簽：
High-speed
transce
1051
TJA
上傳時(shí)間：
2013-10-17
上傳用戶：jisujeke
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基于單DSP的VoIP模擬電話適配器研究與實(shí)現(xiàn):提出和實(shí)現(xiàn)了一種新穎的基于單個(gè)通用數(shù)字信號處理器(DSP)的VoIP模擬電話適配器方案。DSP的I/O和存儲資源非常有限，通常適于運(yùn)算密集型應(yīng)用，不適宜控制密集型應(yīng)用[5]。該系統(tǒng)高效利用單DSP的I/O和片內(nèi)外存儲器資源，采用μC/OS-II嵌入式實(shí)時(shí)操作系統(tǒng)，支持SIP和TCP-UDP/IP協(xié)議，通過LAN或者寬帶接入，使普通電話機(jī)成為Internet終端，實(shí)現(xiàn)IP電話。該系統(tǒng)軟硬件結(jié)構(gòu)緊湊高效，運(yùn)行穩(wěn)定，成本低，具有廣闊的應(yīng)用前景。關(guān)鍵詞：模擬電話適配器；IP電話；數(shù)字信號處理器；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
標(biāo)簽：
VoIP
DSP
模擬電話
適配器
上傳時(shí)間：
2013-11-20
上傳用戶：Wwill
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The LogiCORE™ GTP Wizard automates the task of creating HDL wrappers to configure the high-speed serial GTP transceivers in Virtex™-5 LXT and SXT devices. The menu-driven interface allows one or more GTP transceivers to be configured using pre-definedtemplates for popular industry standards, or from scratch, to support a wide variety of custom protocols.The Wizard produces a wrapper, an example design, and a testbench for rapid integration and verification of the serial interface with your custom function
Features• Creates customized HDL wrappers to configureVirtex-5 RocketIO™ GTP transceivers• Users can configure Virtex-5 GTP transceivers toconform to industry standard protocols usingpredefined templates, or tailor the templates forcustom protocols• Included protocol templates provide support for thefollowing specifications: Aurora, CPRI, FibreChannel 1x, Gigabit Ethernet, HD-SDI, OBSAI,OC3, OC12, OC48, PCI Express® (PCIe®), SATA,SATA II, and XAUI• Automatically configures analog settings• Each custom wrapper includes example design, testbench; and both implementation and simulation scripts
標(biāo)簽：
Transceiver
Virtex
Wizar
GTP
上傳時(shí)間：
2013-10-23
上傳用戶：leyesome
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L2TP（Layer Two tunneling protocol）是實(shí)現(xiàn)二層隧道VPN（Virtual Private Network）的主要技術(shù)，有L2TPV2和L2TPV3兩個(gè)協(xié)議標(biāo)準(zhǔn)；為了進(jìn)一步提高私有網(wǎng)絡(luò)的安全性，本文研究了VPN和L2TP隧道技術(shù)的基本實(shí)現(xiàn)技術(shù)，并在現(xiàn)有L2TPV2協(xié)議非對稱工作模型的基礎(chǔ)上實(shí)現(xiàn)了向下兼容的支持對稱工作模型的L2TPV3協(xié)議，并對系統(tǒng)的功能和性能進(jìn)行了測試和分析，測試結(jié)果顯示該實(shí)現(xiàn)方案能夠正常完成L2TPV3隧道的建立以及協(xié)議報(bào)文的收發(fā)，且系統(tǒng)性能穩(wěn)定。
標(biāo)簽：
L2TPV3
上傳時(shí)間：
2013-10-31
上傳用戶：iven
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1 Communication protocol (Computer as master)
The communication protocol describes here allows your computer to access 4096 internal registers (W0000-W4095) and 1024 internal relays (B0000-B1023) in the Workstation..
1.1 Request Message Format
Request message is a command message to be sent from the computer to the Workstation. The data structure of request message is shown below. Note that numbers are always in hexadecimal form and converted into ASCII characters. For example, Workstation unit number 14 will appear in the message as character 0(30h) followed by character E(45h); a BCC of 5Ah will appear in the message as character 5(35h) followed by character A(41h).
標(biāo)簽：
HITECH
電腦
通信協(xié)議
上傳時(shí)間：
2013-10-28
上傳用戶：cxl274287265
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Abstract: The application note addresses how G3-PLC, a powerline communications protocol approvedby the International Telecommunications Union (ITU), enables mesh networking in advanced metering
標(biāo)簽：
網(wǎng)狀網(wǎng)絡(luò)
應(yīng)用筆記
通信
上傳時(shí)間：
2013-11-17
上傳用戶：erkuizhang
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很多不同的廠家生產(chǎn)各種型號的計(jì)算機(jī)，它們運(yùn)行完全不同的操作系統(tǒng)，但TCP.IP協(xié)議族允許它們互相進(jìn)行通信。這一點(diǎn)很讓人感到吃驚，因?yàn)樗淖饔靡堰h(yuǎn)遠(yuǎn)超出了起初的設(shè)想。T C P / I P起源于6 0年代末美國政府資助的一個(gè)分組交換網(wǎng)絡(luò)研究項(xiàng)目，到9 0年代已發(fā)展成為計(jì)算機(jī)之間最常應(yīng)用的組網(wǎng)形式。它是一個(gè)真正的開放系統(tǒng)，因?yàn)閰f(xié)議族的定義及其多種實(shí)現(xiàn)可以不用花錢或花很少的錢就可以公開地得到。它成為被稱作“全球互聯(lián)網(wǎng)”或“因特網(wǎng)(Internet)”的基礎(chǔ)，該廣域網(wǎng)（WA N）已包含超過1 0 0萬臺遍布世界各地的計(jì)算機(jī)。本章主要對T C P / I P協(xié)議族進(jìn)行概述，其目的是為本書其余章節(jié)提供充分的背景知識。
TCP.IP協(xié)議 縮略語
ACK (ACKnowledgment) TCP首部中的確認(rèn)標(biāo)志
API (Application Programming Interface) 應(yīng)用編程接口
ARP (Address Resolution protocol) 地址解析協(xié)議
ARPANET(Defense Advanced Research Project Agency NETwork) (美國)國防部遠(yuǎn)景研究規(guī)劃局
AS (Autonomous System) 自治系統(tǒng)
ASCII (American Standard Code for Information Interchange) 美國信息交換標(biāo)準(zhǔn)碼
ASN.1 (Abstract Syntax Notation One) 抽象語法記法1
BER (Basic Encoding Rule) 基本編碼規(guī)則
BGP (Border Gateway protocol) 邊界網(wǎng)關(guān)協(xié)議
BIND (Berkeley Internet Name Domain) 伯克利I n t e r n e t域名
BOOTP (BOOTstrap protocol) 引導(dǎo)程序協(xié)議
BPF (BSD Packet Filter) BSD 分組過濾器
CIDR (Classless InterDomain Routing) 無類型域間選路
CIX (Commercial Internet Exchange) 商業(yè)互聯(lián)網(wǎng)交換
CLNP (ConnectionLess Network protocol) 無連接網(wǎng)絡(luò)協(xié)議
CRC (Cyclic Redundancy Check) 循環(huán)冗余檢驗(yàn)
CSLIP (Compressed SLIP) 壓縮的S L I P
CSMA (Carrier Sense Multiple Access) 載波偵聽多路存取
DCE (Data Circuit-terminating Equipment) 數(shù)據(jù)電路端接設(shè)備
DDN (Defense Data Network) 國防數(shù)據(jù)網(wǎng)
DF (Don’t Fragment) IP首部中的不分片標(biāo)志
DHCP (Dynamic Host Configuration protocol) 動(dòng)態(tài)主機(jī)配置協(xié)議
DLPI (Data Link Provider Interface) 數(shù)據(jù)鏈路提供者接口
DNS (Domain Name System) 域名系統(tǒng)
DSAP (Destination Service Access Point) 目的服務(wù)訪問點(diǎn)
DSLAM (DSL Access Multiplexer) 數(shù)字用戶線接入復(fù)用器
DSSS (Direct Sequence Spread Spectrum) 直接序列擴(kuò)頻
DTS (Distributed Time Service) 分布式時(shí)間服務(wù)
DVMRP (Distance Vector Multicast Routing protocol) 距離向量多播選路協(xié)議
EBONE (European IP BackbONE) 歐洲I P主干網(wǎng)
EOL (End of Option List) 選項(xiàng)清單結(jié)束
EGP (External Gateway protocol) 外部網(wǎng)關(guān)協(xié)議
EIA (Electronic Industries Association) 美國電子工業(yè)協(xié)會(huì)
FCS (Frame Check Sequence) 幀檢驗(yàn)序列
FDDI (Fiber Distributed Data Interface) 光纖分布式數(shù)據(jù)接口
FIFO (First In, First Out) 先進(jìn)先出
FIN (FINish) TCP首部中的結(jié)束標(biāo)志
FQDN (Full Qualified Domain Name) 完全合格的域名
FTP (File Transfer protocol) 文件傳送協(xié)議
HDLC (High-level Data Link Control) 高級數(shù)據(jù)鏈路控制
HELLO 選路協(xié)議
IAB (Internet Architecture Board) Internet體系結(jié)構(gòu)委員會(huì)
IANA (Internet Assigned Numbers Authority) Internet號分配機(jī)構(gòu)
ICMP (Internet Control Message protocol) Internet控制報(bào)文協(xié)議
IDRP (InterDomain Routing protocol) 域間選路協(xié)議
IEEE (Institute of Electrical and Electronics Engineering) （美國）電氣與電子工程師協(xié)會(huì)
IEN (Internet Experiment Notes) 互聯(lián)網(wǎng)試驗(yàn)注釋
IESG (Internet Engineering Steering Group) Internet工程指導(dǎo)小組
IETF (Internet Engineering Task Force) Internet工程專門小組
IGMP (Internet Group Management protocol) Internet組管理協(xié)議
IGP (Interior Gateway protocol) 內(nèi)部網(wǎng)關(guān)協(xié)議
IMAP (Internet Message Access protocol) Internet報(bào)文存取協(xié)議
IP (Internet protocol) 網(wǎng)際協(xié)議
I RTF (Internet Research Task Force) Internet研究專門小組
IS-IS (Intermediate System to Intermediate System protocol) 中間系統(tǒng)到中間系統(tǒng)協(xié)議
ISN (Initial Sequence Number) 初始序號
ISO (International Organization for Standardization) 國際標(biāo)準(zhǔn)化組織
ISOC (Internet SOCiety) Internet協(xié)會(huì)
LAN (Local Area Network) 局域網(wǎng)
LBX (Low Bandwidth X) 低帶寬X
LCP (Link Control protocol) 鏈路控制協(xié)議
LFN (Long Fat Net) 長肥網(wǎng)絡(luò)
LIFO (Last In, First Out) 后進(jìn)先出
LLC (Logical Link Control) 邏輯鏈路控制
LSRR (Loose Source and Record Route) 寬松的源站及記錄路由
MBONE (Multicast Backbone On the InterNEt) Internet上的多播主干網(wǎng)
MIB (Management Information Base) 管理信息庫
MILNET (MILitary NETwork) 軍用網(wǎng)
MIME (Multipurpose Internet Mail Extensions) 通用I n t e r n e t郵件擴(kuò)充
MSL (Maximum Segment Lifetime) 報(bào)文段最大生存時(shí)間
MSS (Maximum Segment Size) 最大報(bào)文段長度
M TA (Message Transfer Agent) 報(bào)文傳送代理
MTU (Maximum Transmission Unit) 最大傳輸單元
NCP (Network Control protocol) 網(wǎng)絡(luò)控制協(xié)議
NFS (Network File System) 網(wǎng)絡(luò)文件系統(tǒng)
NIC (Network Information Center) 網(wǎng)絡(luò)信息中心
NIT (Network Interface Tap) 網(wǎng)絡(luò)接口栓（S u n公司的一個(gè)程序）
NNTP (Network News Transfer protocol) 網(wǎng)絡(luò)新聞傳送協(xié)議
NOAO (National Optical Astronomy Observatories) 國家光學(xué)天文臺
NOP (No Operation) 無操作
NSFNET (National Science Foundation NETwork) 國家科學(xué)基金網(wǎng)絡(luò)
NSI (NASA Science Internet) （美國）國家宇航局I n t e r n e t
NTP (Network Time protocol) 網(wǎng)絡(luò)時(shí)間協(xié)議
NVT (Network Virtual Terminal) 網(wǎng)絡(luò)虛擬終端
OSF (Open Software Foudation) 開放軟件基金
OSI (Open Systems Interconnection) 開放系統(tǒng)互連
OSPF (Open Shortest Path First) 開放最短通路優(yōu)先
PAWS (Protection Against Wrapped Sequence number) 防止回繞的序號
PDU (protocol Data Unit) 協(xié)議數(shù)據(jù)單元
POSIX (Portable Operating System Interface) 可移植操作系統(tǒng)接口
PPP (Point-to-Point protocol) 點(diǎn)對點(diǎn)協(xié)議
PSH (PuSH) TCP首部中的急迫標(biāo)志
RARP (Reverse Address Resolution protocol) 逆地址解析協(xié)議
RFC (Request For Comments) Internet的文檔，其中的少部分成為標(biāo)準(zhǔn)文檔
RIP (Routing Information protocol) 路由信息協(xié)議
RPC (Remote Procedure Call) 遠(yuǎn)程過程調(diào)用
RR (Resource Record) 資源記錄
RST (ReSeT) TCP首部中的復(fù)位標(biāo)志
RTO (Retransmission Time Out) 重傳超時(shí)
RTT (Round-Trip Time) 往返時(shí)間
SACK (Selective ACKnowledgment) 有選擇的確認(rèn)
SLIP (Serial Line Internet protocol) 串行線路I n t e r n e t協(xié)議
SMI (Structure of Management Information) 管理信息結(jié)構(gòu)
SMTP (Simple Mail Transfer protocol) 簡單郵件傳送協(xié)議
SNMP (Simple Network Management protocol) 簡單網(wǎng)絡(luò)管理協(xié)議
SSAP (Source Service Access Point) 源服務(wù)訪問點(diǎn)
SSRR (Strict Source and Record Route) 嚴(yán)格的源站及記錄路由
SWS (Silly Window Syndrome) 糊涂窗口綜合癥
SYN (SYNchronous) TCP首部中的同步序號標(biāo)志
TCP (Transmission Control protocol) 傳輸控制協(xié)議
TFTP (Trivial File Transfer protocol) 簡單文件傳送協(xié)議
TLI (Transport Layer Interface) 運(yùn)輸層接口
TTL (Ti m e - To-Live) 生存時(shí)間或壽命
TUBA (TCP and UDP with Bigger Addresses) 具有更長地址的T C P和U D P
Telnet 遠(yuǎn)程終端協(xié)議
UA (User Agent) 用戶代理
UDP (User Datagram protocol) 用戶數(shù)據(jù)報(bào)協(xié)議
URG (URGent) TCP首部中的緊急指針標(biāo)志
UTC (Coordinated Universal Time) 協(xié)調(diào)的統(tǒng)一時(shí)間
UUCP (Unix-to-Unix CoPy) Unix到U n i x的復(fù)制
WAN (Wide Area Network) 廣域網(wǎng)
WWW (World Wide Web) 萬維網(wǎng)
XDR (eXternal Data Representation) 外部數(shù)據(jù)表示
XID (transaction ID) 事務(wù)標(biāo)識符
XTI (X/Open Transport Layer Interface) X/ O p e n運(yùn)輸層接口
標(biāo)簽：
tcp
協(xié)議
上傳時(shí)間：
2013-11-13
上傳用戶：tdyoung
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本文主要通過介紹PLC通訊的意義和三菱FX系列PLC的四種通訊方式，并重點(diǎn)介紹FX系列PLC與計(jì)算機(jī)無協(xié)議通訊，主要從無協(xié)議通訊的硬件、配線、數(shù)據(jù)寄存器設(shè)置、PLC與計(jì)算機(jī)無協(xié)議通訊的指令用法、PLC程序編寫和計(jì)算機(jī)VB程序的編寫來說明無協(xié)議通訊的過程和一般方法。
My dissertation introduces the significance of PLC communications and the four means of communication of Mitsubishi FX’s PLC, And highlights the no protocol communications of FX series PLC and computer, no protocol communications hardware, wiring, Register data set, and the usage of command about no protocol communications, How to write PLC program and computer VB program to illustrate the process of no protocol communications and general method.
標(biāo)簽：
PLC
三菱FX系列
計(jì)算機(jī)
協(xié)議
上傳時(shí)間：
2014-11-29
上傳用戶：Jerry_Chow
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The LPC2292/2294 microcontrollers are based on a 16/32-bit ARM7TDMI-S CPU with real-time emulation and embedded trace support, together with 256 kB of embedded high-speed flash memory. A 128-bit wide memory interface and a unique accelerator architecture enable 32-bit code execution at the maximum clock rate. For critical code size applications, the alternative 16-bit Thumb mode reduces code by more than 30 pct with minimal performance penalty.
With their 144-pin package, low power consumption, various 32-bit timers, 8-channel 10-bit ADC, 2/4 (LPC2294) advanced CAN channels, PWM channels and up to nine external interrupt pins these microcontrollers are particularly suitable for automotive and industrial control applications as well as medical systems and fault-tolerant maintenance buses. The number of available fast GPIOs ranges from 76 (with external memory) through 112 (single-chip). With a wide range of additional serial communications interfaces, they are also suited for communication gateways and protocol converters as well as many other general-purpose applications.
Remark: Throughout the data sheet, the term LPC2292/2294 will apply to devices with and without the /00 or /01 suffix. The suffixes /00 and /01 will be used to differentiate from other devices only when necessary.
標(biāo)簽：
lpc
datasheet
2292
2294
上傳時(shí)間：
2014-12-30
上傳用戶：aysyzxzm
-
Abstract: The process of designing a radio system can be complex and often involves many project tradeoffs. Witha little insight, balancing these various characteristics can make the job of designing a radio system easier. Thistutorial explores these tradeoffs and provides details to consider for various radio applications. With a focus on theindustrial, scientific, medical (ISM) bands, the subjects of frequency selection, one-way versus two-way systems,modulation techniques, cost, antenna options, power-supply influences, effects on range, and protocol selectionare explored.
標(biāo)簽：
無線
上傳時(shí)間：
2013-12-13
上傳用戶：eastgan
