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intermediate-level

  • SMT常用術語之中英文對比

      AI :Auto-Insertion 自動插件   AQL :acceptable quality level 允收水準   ATE :automatic test equipment 自動測試   ATM :atmosphere 氣壓   BGA :ball grid array 球形矩陣

    標簽: SMT 術語 中英文 對比

    上傳時間: 2013-11-20

    上傳用戶:haoxiyizhong

  • Xilinx UltraScale:新一代架構滿足您的新一代架構需求(EN)

      中文版詳情瀏覽:http://www.elecfans.com/emb/fpga/20130715324029.html   Xilinx UltraScale:The Next-Generation Architecture for Your Next-Generation Architecture    The Xilinx® UltraScale™ architecture delivers unprecedented levels of integration and capability with ASIC-class system- level performance for the most demanding applications.   The UltraScale architecture is the industr y's f irst application of leading-edge ASIC architectural enhancements in an All Programmable architecture that scales from 20 nm planar through 16 nm FinFET technologies and beyond, in addition to scaling from monolithic through 3D ICs. Through analytical co-optimization with the X ilinx V ivado® Design Suite, the UltraScale architecture provides massive routing capacity while intelligently resolving typical bottlenecks in ways never before possible. This design synergy achieves greater than 90% utilization with no performance degradation.   Some of the UltraScale architecture breakthroughs include:   • Strategic placement (virtually anywhere on the die) of ASIC-like system clocks, reducing clock skew by up to 50%    • Latency-producing pipelining is virtually unnecessary in systems with massively parallel bus architecture, increasing system speed and capability   • Potential timing-closure problems and interconnect bottlenecks are eliminated, even in systems requiring 90% or more resource utilization   • 3D IC integration makes it possible to build larger devices one process generation ahead of the current industr y standard    • Greatly increased system performance, including multi-gigabit serial transceivers, I/O, and memor y bandwidth is available within even smaller system power budgets   • Greatly enhanced DSP and packet handling   The Xilinx UltraScale architecture opens up whole new dimensions for designers of ultra-high-capacity solutions.

    標簽: UltraScale Xilinx 架構

    上傳時間: 2013-11-21

    上傳用戶:wxqman

  • PCB Design Considerations and Guidelines for 0.4mm and 0.5mm WLPs

    Abstract: Using a wafer-level package (WLP) can reduce the overall size and cost of your solution.However when using a WLP IC, the printed circuit board (PCB) layout can become more complex and, ifnot carefully planned, result in an unreliable design. This article presents some PCB designconsiderations and general recommendations for choosing a 0.4mm- or 0.5mm-pitch WLP for yourapplication.

    標簽: Considerations Guidelines and Design

    上傳時間: 2013-11-09

    上傳用戶:ls530720646

  • Verilog_HDL的基本語法詳解(夏宇聞版)

            Verilog_HDL的基本語法詳解(夏宇聞版):Verilog HDL是一種用于數字邏輯電路設計的語言。用Verilog HDL描述的電路設計就是該電路的Verilog HDL模型。Verilog HDL既是一種行為描述的語言也是一種結構描述的語言。這也就是說,既可以用電路的功能描述也可以用元器件和它們之間的連接來建立所設計電路的Verilog HDL模型。Verilog模型可以是實際電路的不同級別的抽象。這些抽象的級別和它們對應的模型類型共有以下五種:   系統級(system):用高級語言結構實現設計模塊的外部性能的模型。   算法級(algorithm):用高級語言結構實現設計算法的模型。   RTL級(Register Transfer Level):描述數據在寄存器之間流動和如何處理這些數據的模型。   門級(gate-level):描述邏輯門以及邏輯門之間的連接的模型。   開關級(switch-level):描述器件中三極管和儲存節點以及它們之間連接的模型。   一個復雜電路系統的完整Verilog HDL模型是由若干個Verilog HDL模塊構成的,每一個模塊又可以由若干個子模塊構成。其中有些模塊需要綜合成具體電路,而有些模塊只是與用戶所設計的模塊交互的現存電路或激勵信號源。利用Verilog HDL語言結構所提供的這種功能就可以構造一個模塊間的清晰層次結構來描述極其復雜的大型設計,并對所作設計的邏輯電路進行嚴格的驗證。   Verilog HDL行為描述語言作為一種結構化和過程性的語言,其語法結構非常適合于算法級和RTL級的模型設計。這種行為描述語言具有以下功能:   · 可描述順序執行或并行執行的程序結構。   · 用延遲表達式或事件表達式來明確地控制過程的啟動時間。   · 通過命名的事件來觸發其它過程里的激活行為或停止行為。   · 提供了條件、if-else、case、循環程序結構。   · 提供了可帶參數且非零延續時間的任務(task)程序結構。   · 提供了可定義新的操作符的函數結構(function)。   · 提供了用于建立表達式的算術運算符、邏輯運算符、位運算符。   · Verilog HDL語言作為一種結構化的語言也非常適合于門級和開關級的模型設計。因其結構化的特點又使它具有以下功能:   - 提供了完整的一套組合型原語(primitive);   - 提供了雙向通路和電阻器件的原語;   - 可建立MOS器件的電荷分享和電荷衰減動態模型。   Verilog HDL的構造性語句可以精確地建立信號的模型。這是因為在Verilog HDL中,提供了延遲和輸出強度的原語來建立精確程度很高的信號模型。信號值可以有不同的的強度,可以通過設定寬范圍的模糊值來降低不確定條件的影響。   Verilog HDL作為一種高級的硬件描述編程語言,有著類似C語言的風格。其中有許多語句如:if語句、case語句等和C語言中的對應語句十分相似。如果讀者已經掌握C語言編程的基礎,那么學習Verilog HDL并不困難,我們只要對Verilog HDL某些語句的特殊方面著重理解,并加強上機練習就能很好地掌握它,利用它的強大功能來設計復雜的數字邏輯電路。下面我們將對Verilog HDL中的基本語法逐一加以介紹。

    標簽: Verilog_HDL

    上傳時間: 2014-12-04

    上傳用戶:cppersonal

  • 《器件封裝用戶向導》賽靈思產品封裝資料

    Introduction to Xilinx Packaging Electronic packages are interconnectable housings for semiconductor devices. The major functions of the electronic packages are to provide electrical interconnections between the IC and the board and to efficiently remove heat generated by the device. Feature sizes are constantly shrinking, resulting in increased number of transistors being packed into the device. Today's submicron technology is also enabling large-scale functional integration and system-on-a-chip solutions. In order to keep pace with these new advancements in silicon technologies, semiconductor packages have also evolved to provide improved device functionality and performance. Feature size at the device level is driving package feature sizes down to the design rules of the early transistors. To meet these demands, electronic packages must be flexible to address high pin counts, reduced pitch and form factor requirements. At the same time,packages must be reliable and cost effective.

    標簽: 封裝 器件 用戶 賽靈思

    上傳時間: 2013-11-21

    上傳用戶:不懂夜的黑

  • WP200-將Spartan-3 FPGA用作遠程數碼相機的低成本控制器

      The introduction of Spartan-3™ devices has createdmultiple changes in the evolution of embedded controldesigns and pushed processing capabilities to the “almostfreestage.” With these new FPGAs falling under $20, involume, with over 1 million system gates, and under $5for 100K gate-level units, any design with programmablelogic has a readily available 8- or 16-bit processor costingless than 75 cents and 32-bit processor for less than $1.50.

    標簽: Spartan FPGA 200 WP

    上傳時間: 2013-10-21

    上傳用戶:ligi201200

  • WP409利用Xilinx FPGA打造出高端比特精度和周期精度浮點DSP算法實現方案

    WP409利用Xilinx FPGA打造出高端比特精度和周期精度浮點DSP算法實現方案: High-Level Implementation of Bit- and Cycle-Accurate Floating-Point DSP Algorithms with Xilinx FPGAs

    標簽: Xilinx FPGA 409 DSP

    上傳時間: 2013-10-21

    上傳用戶:huql11633

  • Verilog Coding Style for Efficient Digital Design

      In this paper, we discuss efficient coding and design styles using verilog. This can beimmensely helpful for any digital designer initiating designs. Here, we address different problems rangingfrom RTL-Gate Level simulation mismatch to race conditions in writing behavioral models. All theseproblems are accompanied by an example to have a better idea, and these can be taken care off if thesecoding guidelines are followed. Discussion of all the techniques is beyond the scope of this paper, however,here we try to cover a few of them.

    標簽: Efficient Verilog Digital Coding

    上傳時間: 2013-11-23

    上傳用戶:我干你啊

  • US Navy VHDL Modelling Guide

      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.

    標簽: Modelling Guide Navy VHDL

    上傳時間: 2013-11-20

    上傳用戶:pzw421125

  • FPGA設計重利用方法(Design Reuse Methodology)

      FPGAs have changed dramatically since Xilinx first introduced them just 15 years ago. In thepast, FPGA were primarily used for prototyping and lower volume applications; custom ASICswere used for high volume, cost sensitive designs. FPGAs had also been too expensive and tooslow for many applications, let alone for System Level Integration (SLI). Plus, the development

    標簽: Methodology Design Reuse FPGA

    上傳時間: 2013-11-01

    上傳用戶:shawvi

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