The PCA9674/74A is a drop-in upgrade for the PCF8574/74A providing higher Fast-modePLUs I2C-bus speeds (1 MHz versus 400 kHz) so that the output can support PWMdimming of LEDs, higher I2C-bus drive (30 mA versus 3 mA) so that many more devicescan be on the bus without the need for bus buffers, higher total package sink capacity(200 mA versus 100 mA) that supports having all LEDs on at the same time and moredevice addresses (64 versus 8) are available to allow many more devices on the buswithout address conflicts.
上傳時間: 2013-10-22
上傳用戶:wwwwwen5
FPGA編程,仿真教程
上傳時間: 2014-11-11
上傳用戶:lunshaomo
FPGAs have changed dramatically since Xilinx first introduced them just 15 years ago. In thepast, FPGA were primarily used for prototyping and lower volume applications; custom ASICswere used for high volume, cost sensitive designs. FPGAs had also been too expensive and tooslow for many applications, let alone for System Level Integration (SLI). PLUs, the development
標簽: Methodology Design Reuse FPGA
上傳時間: 2013-10-23
上傳用戶:旗魚旗魚
為了在CDMA系統中更好地應用QDPSK數字調制方式,在分析四相相對移相(QDPSK)信號調制解調原理的基礎上,設計了一種QDPSK調制解調電路,它包括串并轉換、差分編碼、四相載波產生和選相、相干解調、差分譯碼和并串轉換電路。在MAX+PLUsⅡ軟件平臺上,進行了編譯和波形仿真。綜合后下載到復雜可編程邏輯器件EPM7128SLC84-15中,測試結果表明,調制電路能正確選相,解調電路輸出數據與QDPSK調制輸入數據完全一致,達到了預期的設計要求。 Abstract: In order to realize the better application of digital modulation mode QDPSK in the CDMA system, a sort of QDPSK modulation-demodulation circuit was designed based on the analysis of QDPSK signal modulation-demodulation principles. It included serial/parallel conversion circuit, differential encoding circuit, four-phase carrier wave produced and phase chosen circuit, coherent demodulation circuit, difference decoding circuit and parallel/serial conversion circuit. And it was compiled and simulated on the MAX+PLUsⅡ software platform,and downloaded into the CPLD of EPM7128SLC84-15.The test result shows that the modulation circuit can exactly choose the phase,and the output data of the demodulator circuit is the same as the input data of the QDPSK modulate. The circuit achieves the prospective requirement of the design.
上傳時間: 2014-01-13
上傳用戶:qoovoop
UG341 - LogiCORE™ Endpoint Block PLUs v1.6 for PCI Express® 用戶指南
標簽: LogiCORE Endpoint Block 341
上傳時間: 2013-10-11
上傳用戶:woshinimiaoye
為滿足TD-LTE系統對實時性的要求,通過對媒體接入控制(MAC)層和物理層之間的實時性研究以及對操作系統Nucleus PLUs的機制分析,實現了MAC層子幀調度。根據TD-LTE無線綜合測試儀中的設計要求,詳細介紹了Nucleus PLUs任務循環調度以及MAC子幀調度的流程設計。在實現MAC層基本功能的同時滿足了TD-LTE對系統實時性、子幀同步與任務資源管理的需求。
上傳時間: 2013-11-10
上傳用戶:royzhangsz
北京中瑞特通訊設備有限公司( 簡稱CRTE) 為適應專業無線通信市場需求, 開發了一款可配合 MOTOTRBO 系統、MOTOTRBO-IP 互聯系統、FLEXTRBO 系統、SUPOTRBO 系統、SUPOTRBO-PLUs 系統等使用的IP 互聯有線調度設備。產品基于計算機設計,采用IP 方式與系統連接,可根據用戶需要,放 置在有IP 網絡延伸的地方,不受無線網絡覆蓋影響,可在任何有IP 網絡的地方方便架設。 產品具有界面友好、操作簡單、調度業務豐富等特點。
上傳時間: 2013-10-26
上傳用戶:蟲蟲蟲蟲蟲蟲
PCI總線是目前最為流行的一種局部性總線 通過對PCI總線一些典型功能的分析以及時序的闡述,利用VetilogHDL設計了一個將非PCI功能設備轉接到PC1總線上的IP Core 同時,通過在ModeISim SE PLUs 6.0 上運行測試程序模塊,得到了理想的仿真數據波形,從軟件上證明了功能的實現。
上傳時間: 2014-12-30
上傳用戶:himbly
核心板配置 核心板配置癿FPGA芯片是Cyclone II系列癿EP2C8Q208C,具有8256個LEs,36個M4K RAM blocks (4Kbits PLUs 512 parity bits),同時具有165,888bit癿RAM,支持18個Embedded multipliers和2個PLL,資源配備十分豐富。實驗證明,返款芯片在嵌入NIOS II軟核將黑釐開収板癿所有外謳全部跑起來,僅占全部資源癿70-80% ; 核心板同時配備了64Mbit癿SDRAM,對亍運行NIOS軟核提供了有力癿保障,返款芯片為時鐘頻率有143MHz,實驗證明,NIOS II軟核主頻可以平穩運行120MHz,速度迓是相當忚癿; 16Mbit癿配置芯片也為返款核心板增色丌少,丌僅可以存儲配置信息,同時迓可以實現NIOS II軟件程序存儲,你編寫癿程序再大也沒有后頊乀憂了。 20M癿有源晶振也是必丌可少癿,他是整個系統癿時鐘源泉;4個LED對亍調試來說更是提供了徑多方便;復位按鍵,重新配置按鍵,配置指示燈一個也丌能少;同時支持AS模式和JTAG模式; 除此以外,核心板一個更大的特點是它可以獨立亍底板單獨運行,為此配備了5V癿電源接口,高質量癿紅色開關,為了安全迓加入了自恢復保險絲。當然擴展口是丌能少癿,除了SDRAM占用癿38個IO口外,其他100個IO全部擴展出來,為大家可以迕行自我擴展實驗做好了充分癿準備。 四、 下擴展板配置 為了讓FPGA収揮它癿強大功能,黑釐開収板為其謳計一款資源豐富癿下擴展板(乀所以叨下擴展板,是因為我們后續迓會有上擴展板)。下面我們就來簡單介終一下下擴展板癿資源配置。 支持網絡功能,配置ENC28J60網口芯片。ENC28J60是Microchip Technology(美國微芯科技公司)推出癿28引腳獨立以太網控刢器。目前市場上大部分以太網控刢器癿封裝均赸過80引腳,而符吅IEEE 802.3協議癿ENC28J60叧有28引腳,既能提供相應癿功能,又可以大大簡化相關謳計,減小空間; 支持USB功能,配置CH376芯片。CH376 支持USB 謳備方式和USB 主機方式,幵丏內置了USB 途訊協議癿基本固件,內置了處理Mass-Storage海量存儲謳備癿與用途訊協議癿固件,內置了SD 卡癿途訊接口固件,內置了FAT16和FAT32 以及FAT12 文件系統癿管理固件,支持常用癿USB 存儲謳備(包括U 盤/USB 硬盤/USB 閃存盤/USB 讀卡器)和SD 卡(包括標準容量SD 卡和高容量HC-SD 卡以及協議兼容癿MMC 卡和TF 卡); 支持板載128*64的點陣LCD。ST7565P控刢芯片,內置DC/DC電路,途過軟件調節對比度。該芯片支持,幵口和串口丟種方式;
上傳時間: 2013-11-23
上傳用戶:ouyangtongze
The #1 Step-by-Step Guide to labviewNow Completely Updated for labview 8! Master labview 8 with the industry's friendliest, most intuitive tutorial: labview for Everyone, Third Edition. Top labview experts Jeffrey Travis and Jim Kring teach labview the easy way: through carefully explained, step-by-step examples that give you reusable code for your own projects! This brand-new Third Edition has been fully revamped and expanded to reflect new features and techniques introduced in labview 8. You'll find two new chapters, PLUs dozens of new topics, including Project Explorer, AutoTool, XML, event-driven programming, error handling, regular expressions, polymorphic VIs, timed structures, advanced reporting, and much more. Certified labview Developer (CLD) candidates will find callouts linking to key objectives on NI's newest exam, making this book a more valuable study tool than ever. Not just what to d why to do it! Use labview to build your own virtual workbench Master labview's foundations: wiring, creating, editing, and debugging VIs; using controls and indicators; working with data structures; and much more Learn the "art" and best practices of effective labview development NEW: Streamline development with labview Express VIs NEW: Acquire data with NI-DAQmx and the labview DAQmx VIs NEW: Discover design patterns for error handling, control structures, state machines, queued messaging, and more NEW: Create sophisticated user interfaces with tree and tab controls, drag and drop, subpanels, and more Whatever your application, whatever your role, whether you've used labview or not, labview for Everyone, Third Edition is the fastest, easiest way to get the results you're after!
上傳時間: 2013-10-14
上傳用戶:shawvi