The MAX9257/MAX9258 programmable serializer/deserializer (SerDes) devices TrAnsfer both video data and control signals over the same twisted-pair cable. However, control data can only be transmitted during the vertical blank time, which is indicated by the control-channel-enabled output (CCEN) signal. The electronic control unit (ECU) firmware designer needs to know how quickly to respond to the CCEN signal before it times out and how to calculate this duration. This application note describes how to calculate the duration of the CCEN for the MAX9257/MAX9258 SerDes chipset. The calculation is based on STO timeout, clock frequency, and UART bit timing. The CCEN duration is programmable and can be closed if not in use.
基于幅移鍵控技術ASK（Amplitude-Shift Keying），以C8051F340單片機作為監測終端控制器，C8051F330D單片機作為探測節點控制器，采用半雙工的通信方式，通過監控終端和探測節點的無線收發電路，實現數據的雙向無線傳輸。收發電路采用直徑為0.8 mm的漆包線自行繞制成圓形空心線圈天線，天線直徑為（3.4±0.3）cm。試驗表明，探測節點與監測終端的通信距離為24 cm，通過橋接方式，節點收發功率為102 mW時，節點間的通信距離可達20 cm。與傳統無線收發模塊相比，該無線收發電路在受體積、功耗、成本限制的場合有廣闊的應用前景。
Abstract:
Based on ASK technology and with the C8051F340 and C8051F330D MCU as the controller， using half-duplex communication mode， this paper achieves bi-directional data TrAnsfer. Transceiver circuit constituted by enameled wire which diameter is 0.8mm and wound into a diameter （3.4±0.3） cm circular hollow coil antenna. Tests show that the communication distance between detection and monitoring of the terminal is 24cm，the distance is up to 20cm between two nodes when using the manner of bridging and the node transceiver power is 102mW. Compared with the conventional wireless transceiver modules， the circuit has wide application prospect in small size， low cost and low power consumption and other characteristics.
The PCA82C250 and PCA82C251 are advanced transceiver products for use in automotive and general industrialapplications with TrAnsfer rates up to 1 Mbit/s. They support the differential bus signal representation beingdescribed in the international standard for in-vehicle CAN high-speed applications (ISO 11898). Controller AreaNetwork (CAN) is a serial bus protocol being primarily intended for transmission of control related data between anumber of bus nodes.
The PL2303 USB to Serial adapter is your smart and convenient accessory forconnecting RS-232 serial devices to your USB-equipped Windows host computer. Itprovides a bridge connection with a standard DB 9-pin male serial port connector inone end and a standard Type-A USB plug connector on the other end. You simplyattach the serial device onto the serial port of the cable and plug the USB connectorinto your PC USB port. It allows a simple and easy way of adding serial connectionsto your PC without having to go thru inserting a serial card and traditional portconfiguration.This USB to Serial adapter is ideal for connecting modems, cellular phones, PDAs,digital cameras, card readers and other serial devices to your computer. It providesserial connections up to 1Mbps of data TrAnsfer rate. And since USB does not requireany IRQ resource, more devices can be attached to the system without the previoushassles of device and resource conflicts.Finally, the PL-2303 USB to Serial adapter is a fully USB Specification compliantdevice and therefore supports advanced power management such as suspend andresume operations as well as remote wakeup. The PL-2303 USB Serial cable adapteris designed to work on all Windows operating systems.
摘 要 瞬態仿真領域的許多工作需要獲得可視化數據, 仿真電路不能將輸出參數繪制成圖形時研究工作將受到很大影響. 而權威電路仿真軟件PSpice 在這個方面不盡如人意. 本文提出了一種有效的解決辦法: 通過MATLAB 編程搭建一個PSpice 與MATLAB 的數據接口,使PSpice輸出數據文件可以導入到MATLAB中繪制圖形. 這令我們能夠很方便地獲得數據的規律以有效地分析仿真結果, 這項技術對于教學和工程實踐都有比較實際的幫助.關鍵詞: 瞬態仿真 仿真程序 PSpice MATLAB 可視化數據The Data TrAnsfer from Pspice to MATLABWu hao Ning yuanzhong Liang yingAbstract Many works in the area of transient simulation has shown how a emulator such asPSpice can be interfaced to an control analysis package such as MATLAB to get viewdata. Thepaper describes how such interfaces can be made using the MATLAB programming. The platformas a typical platform will solve the problem that PSpice software sometimes can not draw the datato a picture. It can make us find the rule from numerous data very expediently, so we can analyzethe outcome of the simulation. And it also can be used in the field of education.Keywords Transient Simulation Emulator PSpice MATLAB Viewdata1 引言科學研究和工程應用常需要進行電路仿真 PSpice可進行直流 交流 瞬態等基本電路特性分析 也可進行蒙托卡諾 MC 統計分析 最壞情況 Wcase 分析 優化設計等復雜電路特性分析 它是國際上仿真電路的權威軟件 而MATLAB的主要特點有 高效方便的矩陣和數組運算 編程效率高 結構化面向對象 方便的繪圖功能 用戶使用方便 工具箱功能強大 兩者各有著重點 兩種軟件結合應用 對研究工作有很重要的意義香港理工大學Y. S. LEE 等人首先將PSpice和MATLAB結合 開發了電力電子電路優化用的CAD 程序MATSPICE[6] 將兩者相結合的關鍵在于 如何用MATLAB 獲取PSpice的仿真數據 對此參考文獻 6 里沒有詳細敘述 本文著重說明用MATLAB 讀取PSpice仿真數據的具體方法本論文利用MATLAB對PSpice仿真出的數據處理繪制出后者無法得到或是效果不好的仿真圖形 下面就兩者結合使用的例子 進行具體說明
Consumer display applications commonly use high-speed LVDS interfaces to TrAnsfer videodata. Spread-spectrum clocking can be used to address electromagnetic compatibility (EMC)issues within these consumer devices. This application note uses Spartan®-6 FPGAs togenerate spread-spectrum clocks using the DCM_CLKGEN primitive.
為提升虛擬儀器傳輸速率與實時性能，擴展監測范圍，在VC的軟件平臺上設計了一種全功能虛擬示波器。與傳統虛擬示波器相比，該系統采用嵌入式系統完成信號采集，采用工業以太網為傳輸介質，通過線性插值算法和多線程編程思想，實現波形顯示、參數計算、頻譜分析以及波形存儲及回放功能。實驗結果表明，該虛擬示波器可以實現20 kHz采樣頻率下的波形精確顯示，達到預期的各項指標。
Abstract:
o enhance the TrAnsfer rate and real-time of virtual instrument performance， expand scope of monitoring， this paper uses the VCs software platform to design a fully functional virtual oscilloscope. Compared with traditional virtual oscilloscope， this system adopts the embedded system to complete the data acquisition， industrial Ethernet as the transmission medium used by the linear interpolation algorithm and multi-threaded programming ideas， namely to achieve waveform display， parameter calculation， spectrum analysis and waveform storage and playback. Experimental results show that the virtual oscilloscope can accurately display the waveform with 20kHz sampling frequency， and achieve the desired targets.
The NCV7356 is a physical layer device for a single wire data linkcapable of operating with various Carrier Sense Multiple Accesswith Collision Resolution (CSMA/CR) protocols such as the BoschController Area Network (CAN) version 2.0. This serial data linknetwork is intended for use in applications where high data rate is notrequired and a lower data rate can achieve cost reductions in both thephysical media components and in the microprocessor and/ordedicated logic devices which use the network.The network shall be able to operate in either the normal data ratemode or a high-speed data download mode for assembly line andservice data TrAnsfer operations. The high-speed mode is onlyintended to be operational when the bus is attached to an off-boardservice node. This node shall provide temporary bus electrical loadswhich facilitate higher speed operation. Such temporary loads shouldbe removed when not performing download operations.The bit rate for normal communications is typically 33 kbit/s, forhigh-speed transmissions like described above a typical bit rate of83 kbit/s is recommended. The NCV7356 features undervoltagelockout, timeout for faulty blocked input signals, output blankingtime in case of bus ringing and a very low sleep mode current.
