XAPP520将符合2.5V和3.3V I/O标准的7系列FPGA高性能I/O Bank进行连接 The I/Os in Xilinx® 7 series FPGAs are classified as either high range (HR) or high performance (HP) banks. HR I/O banks can be operated from 1.2V to 3.3V, whereas HP I/O banks are optimized for operation between 1.2V and 1.8V. In circumstances that require an HP 1.8V I/O bank to interface with 2.5V or 3.3V logic, a range of optionS can be deployed. This application note describes methodologies for interfacing 7 series HP I/O banks with 2.5V and 3.3V systems
上传时间： 2013-11-06
上传用户：wentianyou
欢迎使用 PowerPCB 教程。本教程描述了 PADS-PowerPCB 的绝大部分功能和特点，以及使用的各个过程，这些功能包括： · 基本操作 · 建立元件(Component) · 建立板子边框线(Board outline) · 输入网表(Netlist) · 设置设计规则(Design Rule) · 元件(Part)的布局(Placement) · 手工和交互的布线 · SPECCTRA全自动布线器(Route Engine) · 覆铜(Copper Pour) · 建立分隔/混合平面层(Split/mixed Plane) · Microsoft的目标连接与嵌入(OLE)(Object Linking Embedding) · 可选择的装配选件(Assembly optionS) · 设计规则检查(Design Rule Check) · 反向标注(Back Annotation) · 绘图输出(Plot Output) 使用本教程后，你可以学到印制电路板设计和制造的许多基本知识。
上传时间： 2013-10-08
上传用户：x18010875091
15.2 已經加入了有關貫孔及銲點的Z軸延遲計算功能. 先開啟 Setup - Constraints - Electrical constraint sets 下的 DRC 選項. 點選 Electrical Constraints dialog box 下 optionS 頁面 勾選 Z-Axis delay栏.
上传时间： 2013-11-12
上传用户：Late_Li
§1、安装： SPB15.2 CD1～3，安装1、2，第3为库，不安装 License安装： 设置环境变量lm_license_file D:\Cadence\license.dat 修改license中SERVER yyh ANY 5280为SERVER zeng ANY 5280 §2、用Design Entry CIS(Capture)设计原理图 进入Design Entry CIS Studio 设置操作环境\optionS\Preferencses: 颜色：colors/Print 格子：Grid Display 杂项：Miscellaneous .........常取默认值
上传时间： 2014-01-25
上传用户：wangcehnglin
系统可用编辑器1. Overview 2. System Requirements 3. Contents of the Distribution Package 4. List of Available Command Line Flag optionS 5. Contents of the Extracted Files 6. Installing the Software in Interactive Mode 7. Installing the Software in Silent Mode 8. Installing the INF Files Prior to OS Installation 8A. Installing the Windows* XP INF Files Prior to OS Installation
标签： Distribution Requirements Overview Contents
上传时间： 2015-02-23
上传用户：wab1981
Complete video store application in C++ using linked lists to store data in files. it keeps track of videos and customers and have many checks and optionS.
标签： store application Complete linked
上传时间： 2014-06-20
上传用户：zhoujunzhen
介绍几种cpuThe 8xC251SA/SB/SP/SQ improves on the MCS-51 architecture and peripheral features, introducing the advanced register based CPU architecture i.e., the MCS 251 microcontroller architecture. The register based CPU supports a 40-byte register file. In addition, the 8xC251SA/SB/SP/SQ microcontroller has 256-Kbyte expanded external code/data memory space and 64-Kbyte stack space. The new controller is also specially designed to execute C code efficiently. More importantly, the 8xC251SA/SB/SP/SQ maintains binary code compatibility with MCS 51 microcontrollers but at the same time allows the use of the powerful MCS 251 microcontroller instruction set, with many new 8, 16 and 32 bit instructions available. The 8xC251SA/SB/SP/SQ has 512 bytes or 1 Kbyte of on-chip data RAM optionS and is available in 16 Kbytes and 8 Kbytes of on-chip ROM/OTPROM or ROMless optionS.
标签： architecture introducin peripheral improves
上传时间： 2015-03-15
上传用户：ccclll
解决时钟问题，acm竞赛题 A weird clock marked from 0 to 59 has only a minute hand. It won t move until a special coin is thrown into its box. There are different kinds of coins as your optionS. However once you make your choice, you cannot use any other kind. There are infinite number of coins of each kind, each marked with a number d ( 0 <= 1000 ), meaning that this coin will make the minute hand move d times clockwise the current time. For example, if the current time is 45, and d = 2. Then the minute hand will move clockwise 90 minutes and will be pointing to 15. Now you are given the initial time s ( 0 <= s <= 59 ) and the coin s type d. Write a program to find the minimum number of d-coins needed to turn the minute hand back to 0.
标签： 时钟
上传时间： 2015-05-21
上传用户：rishian
这个例子如果运行,将在仿真的PC窗口中的第1,2,3行显示一些信息后,在随机位置显示 1 ~ 5 .由于keil c51默认不支持重入函数,它的重入函数使用仿真的重入栈而不使用系统栈,而Small RTOS 51没有进行重入栈管理,所以在TaskA~TaskE虽然及其相似,但不能合并. 注意:(1)在KEIL C51 工程中,我已经把输出文件目录设在e:\temp中,您可以在Project->optionS for Target "Target 1"的output页点击Select Folder for Objects...和Listing页点击Select Folder for Listing...改变. (2)编译时会有5个警告,其中一个是因为没有使用一个系统函数OSSendSignal引起,它可以忽略.另4个是禁止任务间变量覆盖分析引起,必须忽略.感谢网友John X. Liu,在这个例子中我使用了他编写的仿真(dllPc51Emu.dll),这个dll原来是为他移植的Ucos-ii for keil c51的例子编写. (3)Pc51Emu.dll在KEIL C51 V6.23 V7.00工作不正常.
上传时间： 2015-05-29
上传用户：无聊来刷下
这个例子是例子2的另一种写法（但任务数量不同）,它使用了最高优先级任务作为显示任务,全局变量ShowChar作为参数.函数TaskB是优先级1~10的任务函数,因为没有使用局部变量,这些任务可以用一个函数. 注意:(1)在KEIL C51 工程中,我已经把输出文件目录设在e:\temp中,您可以在Project->optionS for Target "Target 1"的output页点击Select Folder for Objects...和Listing页点击Select Folder for Listing...改变. 感谢网友John X. Liu,在这个例子中我使用了他编写的仿真dll(Pc51Emu.dll),这个dll原来是为他移植的Ucos-ii for keil c51的例子编写. (2)Pc51Emu.dll在KEIL C51 V6.23 V7.00工作不正常.
上传时间： 2015-05-29
上传用户：asddsd
