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se-TO-PowerPCB

PCA9541 2 to 1 I2C-bus master

The PCA9541 is a 2-to-1 I2C-bus master selector designed for high reliability dual masterI2C-bus applications where system operation is required, even when one master fails orthe controller card is removed for maintenance. The two masters (for example, primaryand back-up) are located on separate I2C-buses that connect to the same downstreamI2C-bus slave devices. I2C-bus commands are sent by either I2C-bus master and are usedto select one master at a time. Either master at any time can gain control of the slavedevices if the other master is disabled or removed from the system. The failed master isisolated from the system and will not affect communication between the on-line masterand the slave devices on the downstream I2C-bus.

標簽： master C-bus 9541 PCA

上傳時間： 2013-10-09

上傳用戶：3294322651
3-V TO 5.5-V MULTICHANNEL RS-2

The MAX3243E device consists of three line drivers, five line receivers, and a dual charge-pump circuit with±15-kV ESD (HBM and IEC61000-4-2, Air-Gap Discharge) and ±8-kV ESD (IEC61000-4-2, Contact Discharge)protection on serial-port connection pins. The device meets the requirements of TIA/EIA-232-F and provides theelectrical interface between an asynchronous communication controller and the serial-port connector. Thiscombination of drivers and receivers matches that needed for the typical serial port used in an IBM PC/AT, orcompatible. The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-Vsupply. In addition, the device includes an always-active noninverting output (ROUT2B), which allowsapplications using the ring indicator to transmit data while the device is powered down. The device operates atdata signaling rates up to 250 kbit/s and a maximum of 30-V/ms driver output slew rate.

標簽： MULTICHANNEL 5.5 TO RS

上傳時間： 2013-10-19

上傳用戶：ddddddd
基于PIC單片機的脈沖電源

基于PIC單片機的脈沖電源:設(shè)計了一種金屬凝固過程用脈沖電源。該電源采用PIC16F877作為主控芯片，實現(xiàn)對窄脈沖電流幅值的檢測，以及時電流脈沖幅值根據(jù)模糊PID算法進行閑環(huán)控制。使用結(jié)果表明：該電源的輸出脈沖波形良好，電流幅值穩(wěn)定，滿足合金材料凝固過程的工藝要求且運行穩(wěn)定可靠。關(guān)鍵詞：脈沖電源；PIC16F877單片機；模糊PID；閑環(huán)控制 Abstract：A kind of pulse power supply was designed which uses in the metal solidification process ．．I11is power supply used PIC16F877 to take the master control chip reali on to the narrow pulse electric current peak-to-peak value examination，carried on the closed-loop control to the electric current pulse peak-to-peak value basis fuzzy PID algorithm．The use result indicated ，this power supply output se profile is good，and the electric current peak-to-p~k value is stable，It satisfies the alloy material solidification process the technological requirement and movement stable reliable，Key words：p se po wer supply；PIC16F877single-chip microcontroller；f r PID；closed-loop control

標簽： PIC 單片機脈沖電源

上傳時間： 2013-10-27

上傳用戶：xcy122677
An easy way to work with Exter

Internal Interrupts are used to respond to asynchronous requests from a certain part of themicrocontroller that needs to be serviced. Each peripheral in the TriCore as well as theBus Control Unit, the Debug Unit, the Peripheral Control Processor (PCP) and the CPUitself can generate an Interrupt Request.So what is an external Interrupt?An external Interrupt is something alike as the internal Interrupt. The difference is that anexternal Interrupt request is caused by an external event. Normally this would be a pulseon Port0 or Port1, but it can be even a signal from the input buffer of the SSC, indicatingthat a service is requested.The User’s Manual does not explain this aspect in detail so this ApNote will explain themost common form of an external Interrupt request. This ApNote will show that there is aneasy way to react on a pulse on Port0 or Port1 and to create with this impulse an InterruptService Request. Later in the second part of the document, you can find hints on how todebounce impulses to enable the use of a simple switch as the input device.Note: You will find additional information on how to setup the Interrupt System in theApNote “First steps through the TriCore Interrupt System” (AP3222xx)1. It would gobeyond the scope of this document to explain this here, but you will find selfexplanatoryexamples later on.

標簽： Exter easy work with

上傳時間： 2013-10-27

上傳用戶：zhangyigenius
PL2303 USB to Serial Adapter

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.

標簽： Adapter Serial 2303 USB

上傳時間： 2013-11-01

上傳用戶：ghostparker
Vishay新型功率MOSFET采用反向?qū)б齌O-252DP

Vishay新型功率MOSFET采用反向?qū)б齌O-252DPAK封裝

標簽： Vishay MOSFET 252 DP

上傳時間： 2013-11-09

上傳用戶：immanuel2006
ADS to MDK轉(zhuǎn)換例程

ADS to MDK 轉(zhuǎn)換例程由西安畢博制作的MDK指導(dǎo)視頻，下載后打開Realview mdk1.htm頁面即可播放，內(nèi)容包括：模擬仿真、開發(fā)環(huán)境的建立、啟動代碼概述等，是您盡快上手MDK的好工具

標簽： ADS MDK to 轉(zhuǎn)換

上傳時間： 2013-12-21

上傳用戶：dalidala
Protel文件轉(zhuǎn)換成PowerPCB程序下載

資料介紹說明： Protel文件轉(zhuǎn)換成PowerPCB程序，安裝說明： systemdir用于設(shè)置程序文件和字體文件路徑。libdir設(shè)置轉(zhuǎn)換后的庫文件缺省保存路徑，filedir設(shè)置轉(zhuǎn)換后PCB文件缺省保存路徑，可以根據(jù)個人情況在PowerPCB.INI中更改相應(yīng)的路徑。

標簽： PowerPCB Protel 文件轉(zhuǎn)換

上傳時間： 2013-10-21

上傳用戶：gmh1314
mm to mil tool_mm轉(zhuǎn)mil轉(zhuǎn)換工具

mm to mil tool,mm to mil tool_mm轉(zhuǎn)mil轉(zhuǎn)換工具

標簽： mil tool_mm mm to

上傳時間： 2013-10-31

上傳用戶：515414293
用Protel 99 SE實現(xiàn)電子電路仿真時的參數(shù)設(shè)置

用EDA軟件實現(xiàn)電子電路的設(shè)計與仿真，極大地提高了電子電路設(shè)計的效率和效益，已成為電路設(shè)計的重要手段。學(xué)習(xí)和掌握這一技術(shù)十分重要。在各種仿真軟件中，Protel 99 SE獨領(lǐng)風(fēng)騷，它豐富的仿真器件庫和齊全的仿真功能，使它能勝任大多數(shù)電路的仿真工作，再加上前端的原理圖輸人和后端的仿真結(jié)果輸出都具有易學(xué)易用的風(fēng)格，從而倍受廣大電路設(shè)計人員的青睞。使用Protel 99 SE進行電路仿真時，不需要編寫網(wǎng)表文件(盡管它使用與PSPICE相同的仿真內(nèi)核)，系統(tǒng)將根據(jù)所畫電路圖自動生成網(wǎng)表文件并進行仿真，仿真類型的選擇通過對話框完成，十分方便。然而，仿真時有關(guān)參數(shù)的設(shè)置仍然具有較高的技術(shù)含量，它既需要對電路原理的深刻把握，又需要注意軟件的特點。能否正確設(shè)置好仿真參數(shù)，是仿真能否順利進行的關(guān)鍵。本文將通過幾個實例討論這一問題

標簽： Protel 99 電子電路仿真

上傳時間： 2013-11-09

上傳用戶：vodssv