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.
標(biāo)簽： 5channel 9516 PCA I2C
上傳時(shí)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(biāo)簽： translating Level 9517 PCA
上傳時(shí)間： 2013-12-25
上傳用戶：wsf950131
altium designer實(shí)例教程
標(biāo)簽： AD 電路 設(shè)計(jì)實(shí)例
上傳時(shí)間： 2013-11-17
上傳用戶：zhaiye
簡(jiǎn)單實(shí)用
上傳時(shí)間： 2013-10-11
上傳用戶：吾學(xué)吾舞
友善之臂的QtEmbedded實(shí)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(guān)于 Qt...............................................................................................................................2 1.3 Qt/Embedded 簡(jiǎn)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(shí)驗(yàn)一 “Hello word！ ”Qt初探............................................................................................12 實(shí)驗(yàn)二 創(chuàng)建一個(gè)窗口并添加按鈕.......................................................................................17 實(shí)驗(yàn)三 對(duì)象間通信：Signal 和 Slot 機(jī)制........................................................................20 實(shí)驗(yàn)四 菜單和快捷鍵...........................................................................................................29 實(shí)驗(yàn)五 工具條和狀態(tài)欄.......................................................................................................38 實(shí)驗(yàn)六 鼠標(biāo)和鍵盤事件.......................................................................................................48 實(shí)驗(yàn)七 對(duì)話框.......................................................................................................................63 實(shí)驗(yàn)八 Qt 中的繪圖..............................................................................................................75 實(shí)驗(yàn)九 Qt 中的多線程編程..................................................................................................85 實(shí)驗(yàn)十 Qt 中的網(wǎng)絡(luò)編程......................................................................................................97 第四章 QT常用工具的介紹...................................................................................................... 111 4.1 Qt 設(shè)計(jì)器（Qt Designer）............................................................................................ 111 4.2 Tmake..............................................................................................................................113 4.3 Qvfb ................................................................................................................................114
標(biāo)簽： QtEmbedded 教程
上傳時(shí)間： 2013-12-21
上傳用戶：laozhanshi111
隨著FPGA技術(shù)的發(fā)展，F(xiàn)PGA設(shè)計(jì)已不再只是硬件電路的設(shè)計(jì)，而是包含處理器、外圍組件和接口邏輯在內(nèi)的完整數(shù)字系統(tǒng)，同時(shí)在處理器中編程完成嵌入式代碼的FPGA“軟”設(shè)計(jì)。與傳統(tǒng)的主要基于硬件描述語(yǔ)言進(jìn)行FPGA設(shè)計(jì)開發(fā)不同，本文在電路設(shè)計(jì)軟件Altium Designer開發(fā)環(huán)境下，結(jié)合Xilinx公司的ISE設(shè)計(jì)軟件，在Altium Designer的創(chuàng)新電子設(shè)計(jì)平臺(tái)NanoBoard 3000上，設(shè)計(jì)實(shí)現(xiàn)了基于Altium Designer特有的系統(tǒng)級(jí)設(shè)計(jì)方法OpenBus系統(tǒng)的32位處理器控制LED的FPGA嵌入式設(shè)計(jì)。
標(biāo)簽： OpenBus FPGA 嵌入式設(shè)計(jì)
上傳時(shí)間： 2013-11-09
上傳用戶：亞亞娟娟123
Altium 公司認(rèn)識(shí)到越來越需要把所有核心EDA 軟件工具集中到一個(gè)集成軟件包中，從而可以實(shí)現(xiàn)從設(shè)計(jì)概念直到生產(chǎn)的無(wú)縫集成。因此Altium 發(fā)布了專為Windows NT 平臺(tái)構(gòu)建的Protel98，這是首次將所有5 種核心EDA 工具集成于一體的產(chǎn)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(shè)計(jì)、仿真、板卡設(shè)計(jì)和自動(dòng)布線。
上傳時(shí)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(shí)間： 2013-11-07
上傳用戶：swing
電力設(shè)備熱點(diǎn)溫度與電流在線監(jiān)測(cè)預(yù)警系統(tǒng)工作在大型變壓器旁，極易受電磁輻射干擾，針對(duì)該預(yù)警系統(tǒng)的子系統(tǒng)：無(wú)線傳輸部分進(jìn)行了抗電磁干擾設(shè)計(jì)，采用Ansoft Designer軟件仿真分析了PCB（Printed Circuit Board）中電磁波對(duì)PCB電磁兼容性產(chǎn)生的影響，根據(jù)其得出的PCB的電流圖及近場(chǎng)分布圖，分析PCB的電磁兼容性，針對(duì)結(jié)果中的電磁輻射過高區(qū)域進(jìn)行了重新設(shè)計(jì)，經(jīng)Ansoft Designer驗(yàn)證，重新設(shè)計(jì)后的PCB各項(xiàng)指數(shù)有所下降，電磁兼容性得到提高。
標(biāo)簽： Zigbee 無(wú)線傳輸 抗電磁干擾 優(yōu)化設(shè)計(jì)
上傳時(shí)間： 2013-11-11
上傳用戶：ggwz258
介紹音頻信號(hào)數(shù)字通信實(shí)驗(yàn)裝置設(shè)計(jì)的實(shí)現(xiàn)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(hào)數(shù)字化后通過光纖實(shí)現(xiàn)傳輸，并對(duì)電路各個(gè)模塊的功能及實(shí)現(xiàn)加以說明。實(shí)驗(yàn)裝置采用分模塊式的設(shè)計(jì)，設(shè)計(jì)思路靈活，結(jié)構(gòu)清晰。電路在Altium Designer和Protel99中設(shè)計(jì)完成，并且在QuartusⅡ環(huán)境下用VerilogHDL語(yǔ)言進(jìn)行編程并對(duì)程序進(jìn)行仿真。該裝置已做成了實(shí)體，可以實(shí)現(xiàn)音頻信號(hào)的發(fā)射與接收，達(dá)到設(shè)計(jì)提出的要求。
標(biāo)簽： 音頻信號(hào) 數(shù)字化 光纖傳輸 信道
上傳時(shí)間： 2013-10-18
上傳用戶：GHF
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