-
開發板電路圖
標簽：
connector
Sheet
2530
FB
上傳時間：
2013-10-13
上傳用戶：王慶才
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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
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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
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PCB Layout Rule Rev1.70, 規範內容如附件所示, 其中分為:
(1) ”PCB LAYOUT 基本規範”:為R&D Layout時必須遵守的事項, 否則SMT,DIP,裁板時無法生產.
(2) “錫偷LAYOUT RULE建議規範”: 加適合的錫偷可降低短路及錫球.
(3) “PCB LAYOUT 建議規範”:為製造單位為提高量產良率,建議R&D在design階段即加入PCB Layout.
(4) ”零件選用建議規範”: connector零件在未來應用逐漸廣泛, 又是SMT生產時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能顧慮製造的需求, 提高自動置件的比例.
標簽：
LAYOUT
PCB
設計規范
上傳時間：
2013-11-03
上傳用戶：tzl1975
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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.
標簽：
pci
PCB
設計規范
上傳時間：
2014-01-24
上傳用戶：s363994250
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使用說明：請您先正確設置數據庫及JDBC驅動。
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驅動
先新建一數據庫(默認名為jspmo)建立數據庫及表格的命令都在sql.txt內，可以直接復制到數據庫里運行。
默認管理員名為: 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(留言本標題),copyright(版權信息).
以及conn.jsp中的host(數據庫服務器主機),user(數據庫用戶名),pw(數據庫密碼),db(數據庫名),tab(數據庫表名)。
標簽：
http
blog
archives
raofeng
上傳時間：
2015-10-25
上傳用戶：894898248
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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.
標簽：
specification
2.0
USB
Original
上傳時間：
2013-12-31
上傳用戶：familiarsmile
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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
標簽：
channels
indicators
activated
isolated
上傳時間：
2016-02-15
上傳用戶：dongbaobao
-
1、在Eclipse中導入工程，可以通過Eclipse中的菜單File→Import→Existing Projects intoWorkspace中選擇Project；
2、在MySQL中創建數據庫，使用MySQL Control Center執行database目錄下的dbscript.sql數據庫腳本文件創建數據庫SQL語句創建數據庫和表及數據；
3、設置數據庫連接配置，修改doc目錄下的exam.xml文件，將其中的數據庫用戶名和密碼設置為實際的用戶名和密碼；
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Tomcat，在瀏覽器輸入http://localhost:8080/exam，使用賬號s0001，密碼s0001登陸，后臺管理使用賬號admin，密碼dmin登陸。
標簽：
Eclipse
工程
上傳時間：
2013-12-21
上傳用戶：huannan88
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留言簿架構
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 、用戶名與留言內容不能太長或為空
3 、用戶不能冒充版主留言
4 、屏垃圾語言功能
管理：
默認頁為/admin/login.do
9 、留言簿基本參數的設置如留言簿標題，每頁顯示條數
10、設置版主信息
11、設置管理員用戶名、密碼
12、回復留言、編輯留言、刪除留言
13、設置悄悄話功能的開啟與關閉
14、垃圾語言過濾
15、在線更改最大留言字節數
安裝：
1、在oracle中執行document/sql/guestbook.sql
2、設置tomcat server.xml中connector配置節增加一個屬性,URIEncoding="gb2312"
3、用記事本打開WEB-INF/classes/init.properties,修改其中的數據庫ip地址，sid，帳號和密碼等
首頁默認為indx.do
標簽：
oracle
struts
jsp
UBB
上傳時間：
2014-11-16
上傳用戶：zl5712176
