Maxim Analog Essentials are a series of plug-in PERIPHERAL modules that allow engineers to quickly test, evaluate, and integrate Maxim components into their hardware/software designs. The modules electrically and physically conform to the Digilent Pmod™ interface specification and are compatible with any Digilent Pmod-compatible header.
標簽: 模擬技術
上傳時間: 2013-11-14
上傳用戶:ljj722
針對煤礦井下調度及緊急救援系統的需求,以DTMF編解碼模塊為核心,設計了具有自動撥號功能的新型電話系統。該系統利用MT8880對DTMF信號的編解碼功能實現一鍵撥號和遠程設置,通過檢測振鈴和忙音信號,完成自動摘機和掛機過程,配合AGC等外圍電路達到話音清晰流暢的效果。 Abstract: To meet the demand for mine scheduling and emergency rescue system, with using DTMF signal codec as the core, a new telephone system was designed with automatic dialing function. In the system, the DTMF signal encoding and decoding function of MT8880 was used to achieve one-touch dialing and remote setting. The circuit detects the ringing and busy signal, and then completes automatic off-hook and hangup. With AGC(Automatic Gain Control) and other PERIPHERAL circuits, the voice was regulated to a clear and smooth effect.
上傳時間: 2014-11-18
上傳用戶:ly1994
介紹一種基于C8051單片機的動態心電監護系統。該系統由兩部分組成:以C8051F320單片機為核心的數據采集裝置和以PC機為平臺的分析處理系統。硬件電路功耗低,由單片機自帶的USB接口將數據傳送給PC機。軟件平臺采用LabVIEW可視化虛擬儀器系統開發平臺,將傳統儀器的功能模塊集成到計算機中,用戶可通過修改虛擬儀器的程序改變其功能。采用USB接口實時傳輸心電數據,并將數據采集模塊設計為計算機外設,使該系統高速快捷、小巧便攜。 Abstract: In this design,a low-cost ECG electrocardiogram monitoring system is introduced,which consists of two parts:data acquisition device based on C8051F320and PC terminal as the analysis and processing system.The system is low-power consumption,the data is transmitted to the PC terminal by USB interface of the C8051F320.By using the visible virtual instrument system developing platform LabVIEW,the traditional instruments function modules are integrated into the computer,so the user can modify virtual instrument software to change its function to meet their needs.Using USB in-terface to realize real-time ECG data transmission,in addition,ECG data acquisition module is designed as the computer PERIPHERAL,which makes the syetem high-speed and portable.
上傳時間: 2013-11-13
上傳用戶:zhangzhenyu
MG3500SoC是支持H.264高清編解碼器的片上系統,內部集成一個嵌入式ARM926處理器,支持高清H.264編解碼、MPEG鄄2解碼和JPEG編解碼。介紹了MG3500SoC的主要性能特點、引腳排列、主要接口功能及在DVR上的應用,以及MG3500SoC及其周圍器件的硬件設計,提出了在設計中應注意的問題。 Abstract: The MG3500System-on-Chip(SoC)is high definition(HD)H.264codec,including ARM926-EJ processor,H.264encoder/decoder,MPEG2decoder and JPEG/MJPEG encoder/decoder.The features,pin assignments,interfaces and the typical application of MG3500in DVR are introduced in this paper.The application hardware circuit between the MG3500SoC and PERIPHERAL device are given,the questions which the syetem design needs to pay attention are explained.
上傳時間: 2013-11-12
上傳用戶:elinuxzj
介紹一種多功能音樂播放器,它是以AT89S52單片機為核心,并輔有一些外圍器件,采用匯編語言編寫程序,實現多功能音樂播放,歌曲自動循環播放和使用琴鍵自編曲目功能。此外,彩燈顯示歌曲節奏,按鍵跳轉到喜愛曲目,液晶顯示當前播英文曲目。并給出了系統軟硬件設計。 Abstract: It introduces a multifunctional music player,taking AT89S52 single-chip microcomputer as hardware control core and using some PERIPHERAL elements.Programmes are compiled in assembly language to act as expected.There are two functional modes in this system.One is to make the music play automatically and consecutively,the other is to compose new songs through keys.In addition,lights show the pace of music and the English names can be displayed in the liquid crystal screen.With perfect combination of hardware and software,the music player can meet many music lovers’needs for multifunctional music player.And the hardware and software of the system are given.
上傳時間: 2013-11-18
上傳用戶:xiaodu1124
第一章 序論……………………………………………………………6 1- 1 研究動機…………………………………………………………..7 1- 2 專題目標…………………………………………………………..8 1- 3 工作流程…………………………………………………………..9 1- 4 開發環境與設備…………………………………………………10 第二章 德州儀器OMAP 開發套件…………………………………10 2- 1 OMAP介紹………………………………………………………10 2-1.1 OMAP是什麼?…….………………………………….…10 2-1.2 DSP的優點……………………………………………....11 2- 2 OMAP Architecture介紹………………………………………...12 2-2-1 OMAP1510 硬體架構………………………………….…12 2-2.2 OMAP1510軟體架構……………………………………...12 2-2.3 DSP / BIOS Bridge簡述…………………………………...13 2- 3 TI Innovator套件 -- OMAP1510 ……………………………..14 2-2.1 General Purpose processor -- ARM925T………………...14 2-2.2 DSP processor -- TMS320C55x …………………………15 2-2.3 IDE Tool – CCS …………………………………………15 2-2.4 PERIPHERAL ………………………………………………..16 第三章 在OMAP1510上建構Embedded Linux System…………….17 3- 1 嵌入式工具………………………………………………………17 3-1.1 嵌入式程式開發與一般程式開發之不同………….….17 3-1.2 Cross Compiling的GNU工具程式……………………18 3-1.3 建立ARM-Linux Cross-Compiling 工具程式………...19 3-1.4 Serial Communication Program………………………...20 3- 2 Porting kernel………………………………………………….…21 3-2.1 Setup CCS ………………………………………….…..21 3-2.2 編譯及上傳Loader…………………………………..…23 3-2.3 編譯及上傳Kernel…………………………………..…24 3- 3 建構Root File System………………………………………..…..26 3-3.1 Flash ROM……………………………………………...26 3-3.2 NFS mounting…………………………………………..27 3-3.3 支援NFS Mounting 的kernel…………………………..27 3-3.4 提供NFS Mounting Service……………………………29 3-3.5 DHCP Server……………………………………………31 3-3.6 Linux root 檔案系統……………………………….…..32 3- 4 啟動及測試Innovator音效裝置…………………………..…….33 3- 5 建構支援DSP processor的環境…………………………...……34 3-5.1 Solution -- DSP Gateway簡介……………………..…34 3-5.2 DSP Gateway運作架構…………………………..…..35 3- 6 架設DSP Gateway………………………………………….…36 3-6.1 重編kernel……………………………………………...36 3-6.2 DEVFS driver…………………………………….……..36 3-6.3 編譯DSP tool和API……………………………..…….37 3-6.4 測試……………………………………………….…….37 第四章 MP3 Player……………………………………………….…..38 4- 1 MP3 介紹………………………………………………….…….38 4- 2 MP3 壓縮原理……………………………………………….….39 4- 3 Linux MP3 player – splay………………………………….…….41 4.3-1 splay介紹…………………………………………….…..41 4.3-2 splay 編譯………………………………………….…….41 4.3-3 splay 的使用說明………………………………….……41 第五章 程式改寫………………………………………………...…...42 5-1 程式評估與改寫………………………………………………...…42 5-1.1 Inter-Processor Communication Scheme…………….....42 5-1.2 ARM part programming……………………………..…42 5-1.3 DSP part programming………………………………....42 5-2 程式碼………………………………………………………..……43 5-3 雙處理器程式開發注意事項…………………………………...…47 第六章 效能評估與討論……………………………………………48 6-1 速度……………………………………………………………...48 6-2 CPU負載………………………………………………………..49 6-3 討論……………………………………………………………...49 6-3.1分工處理的經濟效益………………………………...49 6-3.2音質v.s 浮點與定點運算………………………..…..49 6-3.3 DSP Gateway架構的限制………………………….…50 6-3.4減少IO溝通……………….………………………….50 6-3.5網路掛載File System的Delay…………………..……51 第七章 結論心得…
上傳時間: 2013-10-14
上傳用戶:a471778
The SN65LBC170 and SN75LBC170 aremonolithic integrated circuits designed forbidirectional data communication on multipointbus-transmission lines. Potential applicationsinclude serial or parallel data transmission, cabledPERIPHERAL buses with twin axial, ribbon, ortwisted-pair cabling. These devices are suitablefor FAST-20 SCSI and can transmit or receivedata pulses as short as 25 ns, with skew lessthan 3 ns.These devices combine three 3-state differentialline drivers and three differential input linereceivers, all of which operate from a single 5-Vpower supply.The driver differential outputs and the receiverdifferential inputs are connected internally to formthree differential input/output (I/O) bus ports thatare designed to offer minimum loading to the buswhenever the driver is disabled or VCC = 0. Theseports feature a wide common-mode voltage rangemaking the device suitable for party-lineapplications over long cable runs.
上傳時間: 2013-10-13
上傳用戶:ytulpx
PROTEUS VSM在單片機系統仿真中的應用::介紹了單片機系統仿真工具PROTEUS VSM 及其在單片機系統仿真中的應用,給出了具體的應用實例,詳細地介紹了PROTEUS VSM 與Keil uVision3的接口方法。關鍵詞:單片機;Keil uVision3;仿真;外圍器件;PROTEUS VSM; Abstract:This paper introduces the simulation tool for M CU system —PROTEUS VSM , and presents the application ofPROTEUS VSM in MCU system simulation through an applicable example.The way of interfacing PROTEUS VSM to Keil uVision3is also presented in details.Keywords:MCU ;Keil uVision3;simulation;PERIPHERAL devices;PROTEUS VSM ;
上傳時間: 2013-11-16
上傳用戶:chenxichenyue
NEC 16位MCU參考手冊 The 78K0R/IC3 is a 16-bit single-chip microcontroller that uses a 78K0R CPU core and incorporates PERIPHERAL functions, such as ROM/RAM, a multi-function timer, a multi-function serial interface, an A/D converter, a programmable gain amplifier (PGA), a comparator, a real-time counter, and a watchdog timer.
上傳時間: 2013-11-02
上傳用戶:努力努力再努力
PIC單片機實用教程基礎篇+提高篇 PIC單片機(PERIPHERAL Interface Controller)是一種用來開發的去控制外圍設備的集成電路(IC)。一種具有分散作用(多任務)功能的CPU。與人類相比,大腦就是CPU,PIC 共享的部分相當于人的神經系統。 PIC 單片機是一個小的計算機 PIC單片機有計算功能和記憶內存像CPU并由軟件控制允行。然而,處理能力—存儲器容量卻很有限,這取決于PIC的類型。但是它們的最高操作頻率大約都在20MHz左右,存儲器容量用做寫程序的大約1K—4K字節。 時鐘頻率與掃描程序的時間和執行程序指令的時間有關系。但不能僅以時鐘頻率來判斷程序處理能力,它還隨處理裝置的體系結構改變(1*)。如果是同樣的體系結構,時鐘頻率較高的處理能力會較強。 這里用字來解釋程序容量。用一個指令(2*)表示一個字。通常用字節(3*)來表示存儲器(4*)容量。一個字節有8位,每位由1或0組成。PIC16F84A單片機 的指令由14位構成。當把1K個子轉換成位為:1 x 1,024 x 14 = 14,336位。再轉換為字節為:14,336/(8 x 1,024) = 1.75K。在計算存儲器的容量時,我們規定 1G 字節 = 1,024M 字節, 1M 字節 = 1,024K 字節, 1K 字節= 1,024 字節. 它們不是以1000為倍數,因為這是用二進制計算的緣故。 1*計算機的物理結構,包括組織結構、容量、該計算機的CPU、存儲器以及輸入輸出設備間的互連。經常特指CPU的組織結構,包括它的寄存器、標志、總線、算術邏輯部件、指令譯碼與執行機制以及定時和控制部件。 2*指出某種操作并標識其操作數(如果有操作數的話)的一種語言構造 3*作為一個單位來操作(運算)的一個二進制字符串,通常比計算機的一個字短。 4*處理機內的所有可尋址存儲空間以及用于執行指令的其它內存儲器。 在計算存儲器的容量時,我們規定 1G 字節 = 1,024M 字節, 1M 字節 = 1,024K 字節, 1K 字節= 1,024 字節. 它們不是以1000為倍數,因為這是用二進制計算的緣故。 用PIC單片機使電路做的很小巧變得可能。 因為PIC單片機可以把計算部分、內存、輸入和輸出等都做在一個芯片內。所以她工作起來效率很高、功能也自由定義還可以靈活的適應不同的控制要求,而不必去更換不同的IC。這樣電路才有可能做的很小巧。
上傳時間: 2013-10-15
上傳用戶:sxdtlqqjl