protel 99se 使用技巧以及常見問題解決方法:里面有一些protel 99se 特別技巧,還有我們經常遇到的一些問題!如何使一條走線至兩個不同位置零件的距離相同? 您可先在Design/Rule/High Speed/Matched Net Lengths的規則中來新增規則設定,最后再用Tools/EqualizeNet Lengths 來等長化即可。 Q02、在SCHLIB中造一零件其PIN的屬性,如何決定是Passive, Input, I/O, Hi- Z,Power,…..?在help中能找到說明嗎?市面有關 SIM?PLD?的書嗎?或貴公司有講義? 你可在零件庫自制零件時點選零件Pin腳,并在Electrical Type里,可以自行設定PIN的 屬性,您可參考臺科大的Protel sch 99se 里面有介紹關于SIM的內容。 Q03、請問各位業界前輩,如何能順利讀取pcad8.6版的線路圖,煩請告知 Protel 99SE只能讀取P-CAD 2000的ASCII檔案格式,所以你必須先將P-CAD8.6版的格式轉為P-CAD 2000的檔案格式,才能讓Protel讀取。 Q04、請問我該如何標示線徑大小的那個平方呢 你可以將格點大小設小,還有將字形大小縮小,再放置數字的平方位置即可。 Q05、請問我一次如何更改所有組件的字型 您可以點選其中一個組件字型,再用Global的方法就可以達成你的要求。
上傳時間: 2015-01-01
上傳用戶:yxgi5
This document was developed under the Standard Hardware and Reliability Program (SHARP) TechnologyIndependent Representation of Electronic Products (TIREP) project. It is intended for use by VHSIC HardwareDescription Language (VHDL) design engineers and is offered as guidance for the development of VHDL modelswhich are compliant with the VHDL Data Item Description (DID DI-EGDS-80811) and which can be providedto manufacturing engineering personnel for the development of production data and the subsequent productionof hardware. Most VHDL modeling performed to date has been concentrated at either the component level orat the conceptual system level. The assembly and sub-assembly levels have been largely disregarded. Under theSHARP TIREP project, an attempt has been made to help close this gap. The TIREP models are based upon lowcomplexity Standard Electronic Modules (SEM) of the format A configuration. Although these modules are quitesimple, it is felt that the lessons learned offer guidance which can readily be applied to a wide range of assemblytypes and complexities.
上傳時間: 2013-11-20
上傳用戶:pzw421125
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.
上傳時間: 2014-01-24
上傳用戶:s363994250
Q01、如何使一條走線至兩個不同位置零件的距離相同? 您可先在Design/Rule/High Speed/Matched Net Lengths的規則中來新增規則設定,最 后再用Tools/EqualizeNet Lengths 來等長化即可。 Q02、在SCHLIB中造一零件其PIN的屬性,如何決定是Passive, Input, I/O, Hi- Z,Power,…..?在help中能找到說明嗎?市面有關 SIM?PLD?的書嗎?或貴公司有講義? 你可在零件庫自制零件時點選零件Pin腳,并在Electrical Type里,可以自行設定PIN的 屬性,您可參考臺科大的Protel sch 99se 里 面有介紹關于SIM的內容。 Q03、請問各位業界前輩,如何能順利讀取pcad8.6版的線路圖,煩請告知 Protel 99SE只能讀取P-CAD 2000的ASCII檔案格式,所以你必須先將P-CAD8.6版的格式 轉為P-CAD 2000的檔案格式,才能讓Protel讀取。
標簽: Protel
上傳時間: 2013-11-07
上傳用戶:tangsiyun
multisim10.0仿真軟件破解版下載:【軟件介紹】 Multisim本是加拿大圖像交互技術公司(Interactive Image Technoligics簡稱IIT公司)推出的以Windows為基礎的仿真工具,被美國NI公司收購后,更名為NI Multisim ,而V10.0是其(即NI,National Instruments)最新推出的Multisim最新版本。 目前美國NI公司的EWB的包含有電路仿真設計的模塊Multisim、PCB設計軟件Ultiboard、布線引擎Ultiroute及通信電路分析與設計模塊Commsim 4個部分,能完成從電路的仿真設計到電路版圖生成的全過程。Multisim、Ultiboard、Ultiroute及Commsim 4個部分相互獨立,可以分別使用。Multisim、Ultiboard、Ultiroute及Commsim 4個部分有增強專業版(Power Professional)、專業版(Professional)、個人版(Personal)、教育版(Education)、學生版(Student)和演示版(Demo)等多個版本,各版本的功能和價格有著明顯的差異。 NI Multisim 10用軟件的方法虛擬電子與電工元器件,虛擬電子與電工儀器和儀表,實現了“軟件即元器件”、“軟件即儀器”。NI Multisim 10是一個原理電路設計、電路功能測試的虛擬仿真軟件。 NI Multisim 10的元器件庫提供數千種電路元器件供實驗選用,同時也可以新建或擴充已有的元器件庫,而且建庫所需的元器件參數可以從生產廠商的產品使用手冊中查到,因此也很方便的在工程設計中使用。 NI Multisim 10的虛擬測試儀器儀表種類齊全,有一般實驗用的通用儀器,如萬用表、函數信號發生器、雙蹤示波器、直流電源;而且還有一般實驗室少有或沒有的儀器,如波特圖儀、字信號發生器、邏輯分析儀、邏輯轉換器、失真儀、頻譜分析儀和網絡分析儀等。 NI Multisim 10具有較為詳細的電路分析功能,可以完成電路的瞬態分析和穩態分析、 時域和頻域分析、器件的線性和非線性分析、電路的噪聲分析和失真分析、離散傅里葉分析、電路零極點分析、交直流靈敏度分析等電路分析方法,以幫助設計人員分析電路的性能。 NI Multisim 10可以設計、測試和演示各種電子電路,包括電工學、模擬電路、數字電路、射頻電路及微控制器和接口電路等。可以對被仿真的電路中的元器件設置各種故障,如開路、短路和不同程度的漏電等,從而觀察不同故障情況下的電路工作狀況。在進行仿真的同時,軟件還可以存儲測試點的所有數據,列出被仿真電路的所有元器件清單,以及存儲測試儀器的工作狀態、顯示波形和具體數據等。 NI Multisim 10有豐富的help功能,其help系統不僅包括軟件本身的操作指南,更要的是包含有元器件的功能解說,help中這種元器件功能解說有利于使用EWB進行CAI教學。另外,NI Multisim10還提供了與國內外流行的印刷電路板設計自動化軟件Protel及電路仿真軟件PSpice之間的文件接口,也能通過Windows的剪貼板把電路圖送往文字處理系統中進行編輯排版。支持VHDL和Verilog HDL語言的電路仿真與設計。 利用NI Multisim 10可以實現計算機仿真設計與虛擬實驗,與傳統的電子電路設計與實驗方法相比,具有如下特點:設計與實驗可以同步進行,可以邊設計邊實驗,修改調試方便;設計和實驗用的元器件及測試儀器儀表齊全,可以完成各種類型的電路設計與實驗;可方便地對電路參數進行測試和分析;可直接打印輸出實驗數據、測試參數、曲線和電路原理圖;實驗中不消耗實際的元器件,實驗所需元器件的種類和數量不受限制,實驗成本低,實驗速度快,效率高;設計和實驗成功的電路可以直接在產品中使用。 NI Multisim 10易學易用,便于電子信息、通信工程、自動化、電氣控制類專業學生自學、便于開展綜合性的設計和實驗,有利于培養綜合分析能力、開發和創新的能力。 multisim10.0激活碼及破解序列號
上傳時間: 2015-01-03
上傳用戶:daoyue
ADO.NET in a Nutshell is the most complete and concise source of ADO.NET information available. Besides being a valuable reference, this book covers a variety of issues that programmers face when developing web applications or web services that rely on database access. Most examples use Microsoft s C# language. The book s CD includes an add-in to integrate the reference with Visual Studio .NET help files.
標簽: information ADO NET available
上傳時間: 2015-01-11
上傳用戶:nanfeicui
MemCheck Driver Memory Tool The MemCheck code is designed to provide Windows NT/2K/XP driver developers with a tool to help in the detection of the following memory handling issues: Buffer overrun Buffer corruption Buffer use after buffer release Double buffer releases
標簽: MemCheck designed Windows develop
上傳時間: 2014-12-05
上傳用戶:weiwolkt
Demo程序經Keil701編譯后,代碼量為7-8K,可直接在KeilC51上仿真運行。 使用方法:解壓后雙擊yy項目,點調試即可在串口仿真看到結果。 Demo程序創建了3個任務A、B、C優先級分別為2、3、4,A每秒顯示一次,B每3秒顯示一次,C每6秒顯示一次。從顯示結果看,顯示3個A后顯示1個B,顯示6個A和2個B后顯示1個C,結果顯然正確。用戶可以仿照范例運用更多系統API函數寫出自己的程序。只要程序中有顯示語句就可以用軟件仿真器看結果。注意:系統提供的顯示函數是并發的,他不是直接顯示到串口,而是先輸出到顯存,用戶不必擔心IO慢速操作影響程序運行。串口輸入也采用了同樣的技術,他使得用戶在CPU忙于處理其他任務時照樣可以盲打輸入命令。 將EXL2-shell目錄下的文件覆蓋yy目錄下的同名文件,將word.c、yyshell.c、yyshellsub.c、mystring.c加入項目,刪除yy1.c,編譯后調試即可。輸入help可得到在線幫助,具體命令用法見文章說明。 yangye網友推薦http://www.sics.se/~adam/lwip/網站學習TCPIP,該網站開放源代碼的lwip是專為8bit和16bitMCU設計的TCPIP協議棧,已在多種CPU上移植成功,推薦大家下載。
上傳時間: 2014-11-01
上傳用戶:hopy
A simple utility to split a concatenated vCard format file into separate files (IETF RFC 2426 - vCard MIME Directory Profile). It splits on the BEGIN:VCARD and END:VCARD tags. It was created to help import a Lotus Organizer export file into Palm Desktop
標簽: concatenated separate utility simple
上傳時間: 2013-12-20
上傳用戶:gxf2016
Overview In this chapter I introduce Borland C++Builder (BCB) and explain what it is about. I also devote considerable time to explaining the purpose of this book and the philosophy behind my approach to technical writing. Technical subjects covered in this chapter include Creating a simple Multimedia RAD program that plays movies, WAV files, and MIDI files. Shutting down the BCB RAD programming tools and writing raw Windows API code instead. Creating components dynamically on the heap at runtime. Setting up event handlers (closures) dynamically at runtime. A brief introduction to using exceptions. This topic is covered in more depth in Chapter 5, "Exceptions." A brief introduction to ANSI strings. This subject is covered in more depth in Chapter 3, "C++Builder and the VCL." Using the online help. Greping through the include and source files that come with the product and with this book.
標簽: introduce Overview Borland Builder
上傳時間: 2014-01-04
上傳用戶:小鵬