3 FPGA設計流程 完整的FPGA 設計流程包括邏輯電路設計輸入、功能仿真、綜合及時序分析、實現、加載配置、調試。FPGA 配置就是將特定的應用程序設計按FPGA設計流程轉化為數據位流加載到FPGA 的內部存儲器中,實現特定邏輯功能的過程。由于FPGA 電路的內部存儲器都是基于RAM 工藝的,所以當FPGA電路電源掉電后,內部存儲器中已加載的位流數據將隨之丟失。所以,通常將設計完成的FPGA 位流數據存于外部存儲器中,每次上電自動進行FPGA電路配置加載。 4 FPGA配置原理 以Xilinx公司的Qpro Virtex Hi-Rel系列XQV100電路為例,FPGA的配置模式有四種方案可選擇:MasterSerial Mode,Slave Serial Mode,Master selectMAPMode,Slave selectMAP Mode。配置是通過芯片上的一組專/ 復用引腳信號完成的,主要配置功能信號如下: (1)M0、M1、M2:下載配置模式選擇; (2)CLK:配置時鐘信號; (3)DONE:顯示配置狀態、控制器件啟動;
上傳時間: 2013-11-18
上傳用戶:oojj
摘要:介紹了一種利用CPLD芯片設計的數字鐘電路,該系統采用自頂向下的層次模塊化 設計手段構建電路,代表了BDA的發展趨勢。文中結合實例詳盡介紹了原理圖設計輸入方 式以及設計過程。
上傳時間: 2013-10-09
上傳用戶:15736969615
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
This a GUI based system. The GUI is invoked from the command line by typing "ui_start". The GUI is self explanatory. Tool tips are given in blue color. The cursor needs to be positioned on these for detailed explanation. The main file is "runsim.m". In these simulations the SISO option is not explicitly given. This is because the SISO result for a particular type of modulation is shown in every plot for purposes of comparison. This software has been tested on MATLAB version 6.0 and above with signal processing and communication toolbox options.
上傳時間: 2016-08-24
上傳用戶:杜瑩12345
一本價值89元,由圖靈出版社出版的linux經典編程書籍,涉及包括shell,cursor,數據庫,gtk+,qt等諸多內容
標簽: 價值
上傳時間: 2013-12-15
上傳用戶:黃華強
//初始化 if(initscr() == NULL) { perror("initcurs") exit(EXIT_FAILURE) } //設置模式 cbreak() noecho() keypad(stdscr, TRUE) //建立窗口 win = newwin(h, w, 3, 20) box(win, 0, 0) keypad(win, TRUE) wmove(win, cury, curx) mvaddstr(16, 1, "Press arrow keys to move the cursor within the window.\n") mvaddstr(17, 1, "Press q to quit.\n") refresh() wrefresh(win)
標簽: EXIT_FAILURE initcurs initscr perror
上傳時間: 2013-12-20
上傳用戶:FreeSky
DSP(digital singnal processor)是一種獨特的微處理器,是以數字信號來處理大量信息的器件。其工作原理是接收模擬信號,轉換為0或1的數字信號,再對數字信號進行修改、刪除、強化,并在其他系統芯片中把數字數據解譯回模擬數據或實際環境格式。它不僅具有可編程性,而且其實時運行速度可達每秒數以千萬條復雜指令程序,源源超過通用微處理器,是數字化電子世界中日益重要的電腦芯片。它的強大數據處理能力和高運行速度,是最值得稱道的兩大特色
標簽: dsp學習資料
上傳時間: 2015-10-26
上傳用戶:plancking
基于51單片機+12864(st7920)的貪吃蛇游戲
標簽: 單片機
上傳時間: 2015-12-10
上傳用戶:wh22410
DLMS 編輯 本詞條缺少名片圖,補充相關內容使詞條更完整,還能快速升級,趕緊來編輯吧! 配電線報文規范(Distribution Line Message Specification) [IEC 62056-53]是應用層規范,獨立于應用層以下的各個低層,因而也就與通信信道無關,設計用于在計算機集成環境中支持與(能量)分配設備間的消息交換,是由IEC TC57建立并以IEC 61334-4-41發布的國際標準。 中文名 配電線報文規范 外文名 Distribution Line Message Specification) 建立者 IEC TC57 應用領域 于抄表、遠程控制以及增值服務等 這個概念被進一步發展成為設備語言報文規范,其目的在于為結構化建模和儀表數據交換提供一個互操作環境,支持任何能量類型如電、水、氣或熱的計量,應用于遠程抄表、遠程控制以及增值服務
上傳時間: 2016-04-07
上傳用戶:auqaiss
頻道 勁爆,看《歡樂頌》第二季 上傳 書房 登錄 注冊 菜單 收藏到書房下載文檔 上一頁 /386 下一頁 全屏 < 返回首頁 CNC初級教程/FANUC學校講義 頂 8 踩 0 瀏覽 1,196 收藏 89 評論 1 加入豆單 舉報 手機觀看
上傳時間: 2016-05-16
上傳用戶:kim123