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  • 手机PCB图 手机pcb layout六层板

    手机PCB之PROTEL设计图纸

    标签: layout PCB pcb 手机

    上传时间: 2013-11-23

    上传用户:boyaboy

  • 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.

    标签: Efficient Verilog Digital Coding

    上传时间: 2013-11-22

    上传用户:han_zh

  • 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.

    标签: Modelling Guide Navy VHDL

    上传时间: 2014-12-23

    上传用户:xinhaoshan2016

  • State Machine Coding Styles for Synthesis

      本文论述了状态机的verilog编码风格,以及不同编码风格的优缺点,Steve Golson's 1994 paper, "State Machine Design Techniques for Verilog and VHDL" [1], is agreat paper on state machine design using Verilog, VHDL and Synopsys tools. Steve's paper alsooffers in-depth background concerning the origin of specific state machine types.This paper, "State Machine Coding Styles for Synthesis," details additional insights into statemachine design including coding style approaches and a few additional tricks.

    标签: Synthesis Machine Coding Styles

    上传时间: 2013-10-15

    上传用户:dancnc

  • PLD Programming Using VHDL

    本文详细讨论了VHDL语句对PLD设计的影响和设计经验,经典文章,值得仔细阅读消化。,PLD Programming Using VHDL

    标签: Programming Using VHDL PLD

    上传时间: 2013-11-17

    上传用户:teddysha

  • ALLEGRO V16进阶学习

        本章的主要内容介绍Allegro 如何载入Netlist,进而认识新式转法和旧式转法有何不同及优缺点的分析,通过本章学习可以对Allegro 和Capture 之间的互动关係,同时也能体验出Allegro 和Capture 同步变更属性等强大功能。

    标签: ALLEGRO V16 进阶

    上传时间: 2013-12-23

    上传用户:ANRAN

  • VHDL,Verilog,System verilog比较

      本文简单讨论并总结了VHDL、Verilog,System verilog 这三中语言的各自特点和区别As the number of enhancements to variousHardware Description Languages (HDLs) hasincreased over the past year, so too has the complexityof determining which language is best fora particular design. Many designers and organizationsare contemplating whether they shouldswitch from one HDL to another.

    标签: Verilog verilog System VHDL

    上传时间: 2013-10-16

    上传用户:牛布牛

  • Writing Efficient Testbenches

    本文讨论了如何设计有效的testbench,适合刚接触testbench不久的用户阅读提高 (xilinx公司编写)

    标签: Testbenches Efficient Writing

    上传时间: 2013-10-18

    上传用户:xiaodu1124

  • Verilog编码中的非阻塞性赋值

      One of the most misunderstood constructs in the Verilog language is the nonblockingassignment. Even very experienced Verilog designers do not fully understand how nonblockingassignments are scheduled in an IEEE compliant Verilog simulator and do not understand whenand why nonblocking assignments should be used. This paper details how Verilog blocking andnonblocking assignments are scheduled, gives important coding guidelines to infer correctsynthesizable logic and details coding styles to avoid Verilog simulation race conditions

    标签: Verilog 编码 非阻塞性赋值

    上传时间: 2013-10-17

    上传用户:tb_6877751

  • CAM350 8.7.1使用说明

    CAM350 为PCB 设计和PCB 生产提供了相应的工具(CAM350 for PCB Designers 和CAM350 for CAM Engineers),很容易地把PCB设计和PCB生产融合起来。CAM350 v8.7的目标是在PCB设计和PCB制造之间架起一座桥梁随着如今电子产品的朝着小体积、高速度、低价格的趋势发展,导致了设计越来越复杂,这就要求精确地把设计数据转换到PCB生产加工中去。CAM350为您提供了从PCB设计到生产制程的完整流程,从PCB设计数据到成功的PCB生产的转化将变得高效和简化。基于PCB制造过程,CAM350为PCB设计和PCB生产提供了相应的工具(CAM350 for PCB Designers和CAM350 for CAM Engineers),很容易地把PCB设计和PCB生产融合起来。平滑流畅地转换完整的工程设计意图到PCB生产中提高PCB设计的可生产性,成就成功的电子产品为PCB设计和制造双方提供有价值的桥梁作用CAM350是一款独特、功能强大、健全的电子工业应用软件。DOWNSTREAM开发了最初的基于PCB设计平台的CAM350,到基于整个生产过程的CAM350并且持续下去。CAM350功能强大,应用广泛,一直以来它的信誉和性能都是无与伦比的。 CAM350PCB设计的可制造性分析和优化工具今天的PCB 设计和制造人员始终处于一种强大的压力之下,他们需要面对业界不断缩短将产品推向市场的时间、品质和成本开销的问题。在48 小时,甚至在24 小时内完成工作更是很平常的事,而产品的复杂程度却在日益增加,产品的生命周期也越来越短,因此,设计人员和制造人员之间协同有效工作的压力也随之越来越大!随着电子设备的越来越小、越来越复杂,使得致力于电子产品开发每一个人员都需要解决批量生产的问题。如果到了完成制造之后发现设计失败了,则你将错过推向市场的大好时间。所有的责任并不在于制造加工人员,而是这个项目的全体人员。多年的实践已经证明了,你需要清楚地了解到有关制造加工方面的需求是什么,有什么方面的限制,在PCB设计阶段或之后的处理过程是什么。为了在制造加工阶段能够协同工作,你需要在设计和制造之间建立一个有机的联系桥梁。你应该始终保持清醒的头脑,记住从一开始,你的设计就应该是容易制造并能够取得成功的。CAM350 在设计领域是一个物有所值的制造分析工具。CAM350 能够满足你在制造加工方面的需求,如果你是一个设计人员,你能够建立你的设计,将任务完成后提交给产品开发过程中的下一步工序。现在采用CAM350,你能够处理面向制造方面的一些问题,进行一些简单地处理,但是对于PCB设计来说是非常有效的,这就被成为"可制造性(Manufacturable)"。可制造性设计(Designing for Fabrication)使用DFF Audit,你能够确保你的设计中不会包含任何制造规则方面的冲突(Manufacturing Rule Violations)。DFF Audit 将执行超过80 种裸板分析检查,包括制造、丝印、电源和地、信号层、钻孔、阻焊等等。建立一种全新的具有艺术特征的Latium 结构,运行DFF Audit 仅仅需要几分钟的时间,并具有很高的精度。在提交PCB去加工制造之间,就能够定位、标识并立刻修改所有的冲突,而不是在PCB板制造加工之后。DFF Audit 将自动地检查酸角(acid traps)、阻焊条(soldermask slivers)、铜条(copper slivers)、残缺热焊盘(starved thermals)、焊锡搭桥(soldermask coverage)等等。它将能够确保阻焊数据的产生是根据一定安全间距,确保没有潜在的焊锡搭桥的条件、解决酸角(Acid Traps)的问题,避免在任何制造车间的CAM部门产生加工瓶颈。

    标签: CAM 350 使用说明

    上传时间: 2013-11-23

    上传用户:四只眼