The PCA9516 is a BiCMOS integrated circuit intended forapplication in I2C and SMBus systems.While retaining all the operating modes and features of the I2Csystem, it permits extension of the I2C-bus by buffering both the data(SDA) and the clock (SCL) lines, thus enabling five buses of 400 pF.The I2C-bus capacitance limit of 400 pF restricts the number ofdevices and bus length. Using the PCA9516 enables the systemdesigner to divide the bus into five segments off of a hub where anysegment to segment transition sees only one repeater delay.
上傳時間: 2013-11-21
上傳用戶:q123321
The PCA9517 is a CMOS integrated circuit that provides level shifting between lowvoltage (down to 0.9 V) and higher voltage (2.7 V to 5.5 V) I2C-bus or SMBus applications.While retaining all the operating modes and features of the I2C-bus system during thelevel shifts, it also permits extension of the I2C-bus by providing bidirectional buffering forboth the data (SDA) and the clock (SCL) lines, thus enabling two buses of 400 pF. Usingthe PCA9517 enables the system designer to isolate two halves of a bus for both voltageand capacitance. The SDA and SCL pins are over voltage tolerant and arehigh-impedance when the PCA9517 is unpowered.
標簽: translating Level 9517 PCA
上傳時間: 2013-12-25
上傳用戶:wsf950131
altium designer實例教程
上傳時間: 2013-11-17
上傳用戶:zhaiye
簡單實用
上傳時間: 2013-10-11
上傳用戶:吾學吾舞
友善之臂的QtEmbedded實例教程 第一章 LINUX 圖形用戶界面 GUI 介紹.....................................................................................1 1.1 常用 GUI 介紹...................................................................................................................1 1.2 關于 Qt...............................................................................................................................2 1.3 Qt/Embedded 簡介.............................................................................................................4 1.4 Qtopia 介紹.........................................................................................................................4 第二章 QT的安裝..........................................................................................................................6 2.1 Qt X11 的安裝....................................................................................................................6 2.2 Qt/Embedded 安裝..............................................................................................................9 2.3 Qtopia 編譯.......................................................................................................................11 第三章 QT的編程........................................................................................................................12 實驗一 “Hello word! ”Qt初探............................................................................................12 實驗二 創建一個窗口并添加按鈕.......................................................................................17 實驗三 對象間通信:Signal 和 Slot 機制........................................................................20 實驗四 菜單和快捷鍵...........................................................................................................29 實驗五 工具條和狀態欄.......................................................................................................38 實驗六 鼠標和鍵盤事件.......................................................................................................48 實驗七 對話框.......................................................................................................................63 實驗八 Qt 中的繪圖..............................................................................................................75 實驗九 Qt 中的多線程編程..................................................................................................85 實驗十 Qt 中的網絡編程......................................................................................................97 第四章 QT常用工具的介紹...................................................................................................... 111 4.1 Qt 設計器(Qt Designer)............................................................................................ 111 4.2 Tmake..............................................................................................................................113 4.3 Qvfb ................................................................................................................................114
標簽: QtEmbedded 教程
上傳時間: 2013-12-21
上傳用戶:laozhanshi111
隨著FPGA技術的發展,FPGA設計已不再只是硬件電路的設計,而是包含處理器、外圍組件和接口邏輯在內的完整數字系統,同時在處理器中編程完成嵌入式代碼的FPGA“軟”設計。與傳統的主要基于硬件描述語言進行FPGA設計開發不同,本文在電路設計軟件Altium Designer開發環境下,結合Xilinx公司的ISE設計軟件,在Altium Designer的創新電子設計平臺NanoBoard 3000上,設計實現了基于Altium Designer特有的系統級設計方法OpenBus系統的32位處理器控制LED的FPGA嵌入式設計。
上傳時間: 2013-11-09
上傳用戶:亞亞娟娟123
Altium 公司認識到越來越需要把所有核心EDA 軟件工具集中到一個集成軟件包中,從而可以實現從設計概念直到生產的無縫集成。因此Altium 發布了專為Windows NT 平臺構建的Protel98,這是首次將所有5 種核心EDA 工具集成于一體的產品,這5 種核心EDA 工具包括原理圖輸入、可編程邏輯器件(PLD)設計、仿真、板卡設計和自動布線。
上傳時間: 2014-12-30
上傳用戶:pei5
With the Altera Nios II embedded processor, you as the system designercan accelerate time-critical software algorithms by adding custominstructions to the Nios II processor instruction set. Using custominstructions, you can reduce a complex sequence of standard instructionsto a single instruction implemented in hardware. You can use this featurefor a variety of applications, for example, to optimize software innerloops for digital signal processing (DSP), packet header processing, andcomputation-intensive applications. The Nios II configuration wizard,part of the Quartus® II software’s SOPC Builder, provides a graphicaluser interface (GUI) used to add up to 256 custom instructions to theNios II processor
上傳時間: 2013-11-07
上傳用戶:swing
電力設備熱點溫度與電流在線監測預警系統工作在大型變壓器旁,極易受電磁輻射干擾,針對該預警系統的子系統:無線傳輸部分進行了抗電磁干擾設計,采用Ansoft Designer軟件仿真分析了PCB(Printed Circuit Board)中電磁波對PCB電磁兼容性產生的影響,根據其得出的PCB的電流圖及近場分布圖,分析PCB的電磁兼容性,針對結果中的電磁輻射過高區域進行了重新設計,經Ansoft Designer驗證,重新設計后的PCB各項指數有所下降,電磁兼容性得到提高。
上傳時間: 2013-11-11
上傳用戶:ggwz258
介紹音頻信號數字通信實驗裝置設計的實現過程,該裝置以FPGA為主控芯片,以光纖為通訊媒介,將音頻信號數字化后通過光纖實現傳輸,并對電路各個模塊的功能及實現加以說明。實驗裝置采用分模塊式的設計,設計思路靈活,結構清晰。電路在Altium Designer和Protel99中設計完成,并且在QuartusⅡ環境下用VerilogHDL語言進行編程并對程序進行仿真。該裝置已做成了實體,可以實現音頻信號的發射與接收,達到設計提出的要求。
上傳時間: 2013-10-18
上傳用戶:GHF