摘要: 串行傳輸技術具有更高的傳輸速率和更低的設計成本, 已成為業界首選, 被廣泛應用于高速通信領域。提出了一種新的高速串行傳輸接口的設計方案, 改進了Aurora 協議數據幀格式定義的弊端, 并采用高速串行收發器Rocket I/O, 實現數據率為2.5 Gbps的高速串行傳輸。關鍵詞: 高速串行傳輸; Rocket I/O; Aurora 協議 為促使FPGA 芯片與串行傳輸技術更好地結合以滿足市場需求, Xilinx 公司適時推出了內嵌高速串行收發器RocketI/O 的Virtex II Pro 系列FPGA 和可升級的小型鏈路層協議———Aurora 協議。Rocket I/O支持從622 Mbps 至3.125 Gbps的全雙工傳輸速率, 還具有8 B/10 B 編解碼、時鐘生成及恢復等功能, 可以理想地適用于芯片之間或背板的高速串行數據傳輸。Aurora 協議是為專有上層協議或行業標準的上層協議提供透明接口的第一款串行互連協議, 可用于高速線性通路之間的點到點串行數據傳輸, 同時其可擴展的帶寬, 為系統設計人員提供了所需要的靈活性[4]。但該協議幀格式的定義存在弊端,會導致系統資源的浪費。本文提出的設計方案可以改進Aurora 協議的固有缺陷,提高系統性能, 實現數據率為2.5 Gbps 的高速串行傳輸, 具有良好的可行性和廣闊的應用前景。
上傳時間: 2013-10-13
上傳用戶:lml1234lml
減小電磁干擾的印刷電路板設計原則 內 容 摘要……1 1 背景…1 1.1 射頻源.1 1.2 表面貼裝芯片和通孔元器件.1 1.3 靜態引腳活動引腳和輸入.1 1.4 基本回路……..2 1.4.1 回路和偶極子的對稱性3 1.5 差模和共模…..3 2 電路板布局…4 2.1 電源和地…….4 2.1.1 感抗……4 2.1.2 兩層板和四層板4 2.1.3 單層板和二層板設計中的微處理器地.4 2.1.4 信號返回地……5 2.1.5 模擬數字和高壓…….5 2.1.6 模擬電源引腳和模擬參考電壓.5 2.1.7 四層板中電源平面因該怎么做和不應該怎么做…….5 2.2 兩層板中的電源分配.6 2.2.1 單點和多點分配.6 2.2.2 星型分配6 2.2.3 格柵化地.7 2.2.4 旁路和鐵氧體磁珠……9 2.2.5 使噪聲靠近磁珠……..10 2.3 電路板分區…11 2.4 信號線……...12 2.4.1 容性和感性串擾……...12 2.4.2 天線因素和長度規則...12 2.4.3 串聯終端傳輸線…..13 2.4.4 輸入阻抗匹配...13 2.5 電纜和接插件……...13 2.5.1 差模和共模噪聲……...14 2.5.2 串擾模型……..14 2.5.3 返回線路數目..14 2.5.4 對板外信號I/O的建議14 2.5.5 隔離噪聲和靜電放電ESD .14 2.6 其他布局問題……...14 2.6.1 汽車和用戶應用帶鍵盤和顯示器的前端面板印刷電路板...15 2.6.2 易感性布局…...15 3 屏蔽..16 3.1 工作原理…...16 3.2 屏蔽接地…...16 3.3 電纜和屏蔽旁路………………..16 4 總結…………………………………………17 5 參考文獻………………………17
上傳時間: 2013-10-22
上傳用戶:a6697238
The application wizard has created this SoccerDoctor application for you. This application not only demonstrates the basics of using the Microsoft Foundation Classes but is also a starting point for writing your application.
標簽: application SoccerDoctor created wizard
上傳時間: 2015-08-09
上傳用戶:er1219
為你的MFC程序添加宏腳本語言。AppWizard has created this ScriptDemo application for you. This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application.
標簽: application ScriptDemo AppWizard created
上傳時間: 2014-01-27
上傳用戶:彭玖華
AppWizard has created this DSX01 DLL for you. This DLL not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your DLL.
標簽: demonstrates AppWizard DLL created
上傳時間: 2015-09-21
上傳用戶:ryb
AppWizard has created this SEEDDEC2XXX application for you. This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application.
標簽: application demonstrates SEEDDEC2XXX AppWizard
上傳時間: 2015-09-29
上傳用戶:zuozuo1215
The application wizard has created this UCMSGIP application for you. This application not only demonstrates the basics of using the Microsoft Foundation Classes but is also a starting point for writing your application.
標簽: application UCMSGIP created wizard
上傳時間: 2015-12-08
上傳用戶:小草123
Base64算法,This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application
上傳時間: 2015-12-22
上傳用戶:wangyi39
股票源碼The application wizard has created this SCDemo application for you. This application not only demonstrates the basics of using the Microsoft Foundation Classes but is also a starting point for writing your application.
標簽: application created SCDemo wizard
上傳時間: 2016-01-08
上傳用戶:chenjjer
This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application.
標簽: demonstrates application Foundation Microsoft
上傳時間: 2013-12-18
上傳用戶:klin3139