開發(fā)板電路圖
標(biāo)簽： Connector Sheet 2530 FB
上傳時(shí)間： 2013-10-13
上傳用戶：王慶才
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(biāo)簽： MULTICHANNEL 5.5 TO RS
上傳時(shí)間： 2013-10-19
上傳用戶：ddddddd
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(biāo)簽： Adapter Serial 2303 USB
上傳時(shí)間： 2013-11-01
上傳用戶：ghostparker
PCB Layout Rule Rev1.70, 規(guī)範(fàn)內(nèi)容如附件所示, 其中分為: (1) ”PCB LAYOUT 基本規(guī)範(fàn)”:為R&D Layout時(shí)必須遵守的事項(xiàng), 否則SMT,DIP,裁板時(shí)無法生產(chǎn). (2) “錫偷LAYOUT RULE建議規(guī)範(fàn)”: 加適合的錫偷可降低短路及錫球. (3) “PCB LAYOUT 建議規(guī)範(fàn)”:為製造單位為提高量產(chǎn)良率,建議R&D在design階段即加入PCB Layout. (4) ”零件選用建議規(guī)範(fàn)”: Connector零件在未來應(yīng)用逐漸廣泛, 又是SMT生產(chǎn)時(shí)是偏移及置件不良的主因,故製造希望R&D及採購在購買異形零件時(shí)能顧慮製造的需求, 提高自動(dòng)置件的比例.
標(biāo)簽： LAYOUT PCB 設(shè)計(jì)規(guī)范
上傳時(shí)間： 2013-11-03
上傳用戶：tzl1975
This document provides practical, common guidelines for incorporating PCI Express interconnect layouts onto Printed Circuit Boards (PCB) ranging from 4-layer desktop baseboard designs to 10- layer or more server baseboard designs. Guidelines and constraints in this document are intended for use on both baseboard and add-in card PCB designs. This includes interconnects between PCI Express devices located on the same baseboard (chip-to-chip routing) and interconnects between a PCI Express device located “down” on the baseboard and a device located “up” on an add-in card attached through a Connector. This document is intended to cover all major components of the physical interconnect including design guidelines for the PCB traces, vias and AC coupling capacitors, as well as add-in card edge-finger and Connector considerations. The intent of the guidelines and examples is to help ensure that good high-speed signal design practices are used and that the timing/jitter and loss/attenuation budgets can also be met from end-to-end across the PCI Express interconnect. However, while general physical guidelines and suggestions are given, they may not necessarily guarantee adequate performance of the interconnect for all layouts and implementations. Therefore, designers should consider modeling and simulation of the interconnect in order to ensure compliance to all applicable specifications. The document is composed of two main sections. The first section provides an overview of general topology and interconnect guidelines. The second section concentrates on physical layout constraints where bulleted items at the beginning of a topic highlight important constraints, while the narrative that follows offers additional insight.
標(biāo)簽： pci PCB 設(shè)計(jì)規(guī)范
上傳時(shí)間： 2014-01-24
上傳用戶：s363994250
使用說明：請您先正確設(shè)置數(shù)據(jù)庫及JDBC驅(qū)動(dòng)。 參考： http://blog.raofeng.com/love/kiss/archives/2006/16.html http://blog.raofeng.com/love/kiss/archives/2006/13.html http://dev.mysql.com/downloads/Connector/j/3.1.html下載JDBC驅(qū)動(dòng) 先新建一數(shù)據(jù)庫(默認(rèn)名為jspmo)建立數(shù)據(jù)庫及表格的命令都在sql.txt內(nèi)，可以直接復(fù)制到數(shù)據(jù)庫里運(yùn)行。 默認(rèn)管理員名為: admin ,密碼為:jspmo.com 請修改config.jsp中的name(管理員名),password(管理員密碼),sitename(留言本標(biāo)題),copyright(版權(quán)信息). 以及conn.jsp中的host(數(shù)據(jù)庫服務(wù)器主機(jī)),user(數(shù)據(jù)庫用戶名),pw(數(shù)據(jù)庫密碼),db(數(shù)據(jù)庫名),tab(數(shù)據(jù)庫表名)。
標(biāo)簽： http blog archives raofeng
上傳時(shí)間： 2015-10-25
上傳用戶：894898248
The Original USB 2.0 specification released on April 27, 2000 Errata to the USB 2.0 specification as of December 7, 2000 Mini-B Connector Engineering Change Notice to the USB 2.0 specification. Pull-up/pull-down Resistors Engineering Change Notice to the USB 2.0 specification. Errata to the USB 2.0 specification as of May 28, 2002 Interface Association Descriptor Engineering Change Notice to the USB 2.0 specification. Rounded Chamfer Engineering Change Notice to the USB 2.0 specification as of October 8, 2003 Unicode Engineering Change Notice to the USB 2.0 specification as of February 21, 2005 Inter-Chip USB Supplement Revision 1.0 as of March 13, 2006 Revision 1.3 of the USB On-The-Go Supplement as of December 5, 2006 Revision 1.01 of the Micro-USB Cables and Connectors Specification as of April 4, 2007 USB 2.0 Link Power Management Addendum Engineering Change Notice to the USB 2.0 specification as of July 16, 2007.
標(biāo)簽： specification 2.0 USB Original
上傳時(shí)間： 2013-12-31
上傳用戶：familiarsmile
16 relay output channels and 16 isolated digital input channels LED indicators to show activated relays Jumper selectable Form A/Form B-type relay output channel Output status read-back Keep relay output values when hot system reset High-voltage isolation on input channels(2,500 VDC) Hi ESD protection(2,00VDC) High over-voltage protection(70VDC) Wide input range(10~50VDC) Interrupt handling capability High-density DB-62 Connector Board ID
標(biāo)簽： channels indicators activated isolated
上傳時(shí)間： 2016-02-15
上傳用戶：dongbaobao
1、在Eclipse中導(dǎo)入工程，可以通過Eclipse中的菜單File→Import→Existing Projects intoWorkspace中選擇Project； 2、在MySQL中創(chuàng)建數(shù)據(jù)庫，使用MySQL Control Center執(zhí)行database目錄下的dbscript.sql數(shù)據(jù)庫腳本文件創(chuàng)建數(shù)據(jù)庫SQL語句創(chuàng)建數(shù)據(jù)庫和表及數(shù)據(jù)； 3、設(shè)置數(shù)據(jù)庫連接配置，修改doc目錄下的exam.xml文件，將其中的數(shù)據(jù)庫用戶名和密碼設(shè)置為實(shí)際的用戶名和密碼； 4、將doc目錄下的exam.xml文件拷貝到Tomcat的安裝目錄下的conf\Catalina\localhost文件夾下，并修改exam.xml文件中的docBase，將該值指向該工程目錄，如"F:\jsp\21\WebRoot"； 5、確保Tomcat安裝目錄的common\lib下mysql-Connector-java-3.0.16-ga-bin.jar類包文件，如果沒有拷貝WebRoot\WEB-INF\lib目錄下的mysql-Connector-java-3.0.16-ga-bin.jar類包文件到Tomcat安裝目錄的common\lib下； 6、啟動(dòng)Tomcat，在瀏覽器輸入http://localhost:8080/exam，使用賬號s0001，密碼s0001登陸，后臺(tái)管理使用賬號admin，密碼dmin登陸。
上傳時(shí)間： 2013-12-21
上傳用戶：huannan88
留言簿架構(gòu) oracle 9i + jsp + struts 留言簿基本功能： 1 、客人簽寫留言 2 、基本的UBB支持，如[url]http://www.lunji.com[/url],[color="red"]紅色字[/color] 3 、ctrl+enter可提交留言 4 、搜索留言 5 、悄悄話功能 安全： 1 、解決了連串字母將表格撐大問題 2 、用戶名與留言內(nèi)容不能太長或?yàn)榭? 3 、用戶不能冒充版主留言 4 、屏垃圾語言功能 管理： 默認(rèn)頁為/admin/login.do 9 、留言簿基本參數(shù)的設(shè)置如留言簿標(biāo)題，每頁顯示條數(shù) 10、設(shè)置版主信息 11、設(shè)置管理員用戶名、密碼 12、回復(fù)留言、編輯留言、刪除留言 13、設(shè)置悄悄話功能的開啟與關(guān)閉 14、垃圾語言過濾 15、在線更改最大留言字節(jié)數(shù) 安裝： 1、在oracle中執(zhí)行document/sql/guestbook.sql 2、設(shè)置tomcat server.xml中Connector配置節(jié)增加一個(gè)屬性,URIEncoding="gb2312" 3、用記事本打開WEB-INF/classes/init.properties,修改其中的數(shù)據(jù)庫ip地址，sid，帳號和密碼等 首頁默認(rèn)為indx.do
標(biāo)簽： oracle struts jsp UBB
上傳時(shí)間： 2014-11-16
上傳用戶：zl5712176
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