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Abstract: This article discusses future trends in the design of smartphones and other consumer products. The discussion focuses onthe importance of integration, which saves valuable PCB space and drives down costs.
標簽：
集成
智能手機
驅(qū)動器
上傳時間：
2014-01-13
上傳用戶：lhw888
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為提高電容測量精度，針對電容式傳感器的工作原理設(shè)計了基于PIC16LF874單片機電容測量模塊。簡單闡述了電容測量電路的應(yīng)用背景和國內(nèi)外研究現(xiàn)狀，介紹了美國Microchip公司PIC16LF874單片機的特性。電容式傳感器輸出的動態(tài)微弱電容信號通過PS021型電容數(shù)字轉(zhuǎn)換器把模擬量數(shù)據(jù)轉(zhuǎn)換成數(shù)字量數(shù)據(jù)，所測數(shù)據(jù)由PIC16LF874單片機應(yīng)用程序進行處理、顯示和保存。實驗結(jié)果表明，固定電容標稱值為10~20 pF 的測量值相對誤差在1%以內(nèi)，同時也可知被測電容容值越大，測量值和標稱值相對誤差越小。
Abstract:
To improve the accuracy of capacitance measurement，aimed at the principle of work of mercury capacitance acceleration transducer，the design of micro capacitance measurement circuit is based on the key PIC16LF874 chip. Briefly discusses the application of the capacitance measuring circuit for the background and status of foreign researchers，focusing on the United States PIC16LF874 microcontroller features. Capacitive sensor outputed signal through the dynamics of weak PS021-chip capacitors （capacitancedigital converter） to convert analog data into digital data，the measured data from the PIC16LF874 microcontroller application process， display and preservation. Experimental results show that the fixed capacitor 10pF ~ 20pF nominal value of the measured value of relative error is within 1%，but also it canbe seen the value of the measured capacitance larger，measuring value and the nominal value of relative error smaller.
標簽：
PIC
874
16
LF
上傳時間：
2013-10-29
上傳用戶：wojiaohs
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This application report discusses the design of non-invasive optical plethysmographyalso called as pulsoximeter using the MSP430FG437 Microcontroller (MCU). Thepulsoximeter consists of a peripheral probe combined with the MCU displaying theoxygen saturation and pulse rate on a LCD glass. The same sensor is used for bothheart-rate detection and pulsoximetering in this application. The probe is placed on aperipheral point of the body such as a finger tip, ear lobe or the nose. The probeincludes two light emitting diodes (LEDs), one in the visible red spectrum (660nm) andthe other in the infrared spectrum (940nm). The percentage of oxygen in the body isworked by measuring the intensity from each frequency of light after it transmitsthrough the body and then calculating the ratio between these two intensities.
標簽：
Pulsoximeter
Single-Chip
Des
上傳時間：
2013-10-27
上傳用戶：黑漆漆
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PCA9511, PCA9512, PCA9513, PCA9514, PCA9515, PCA9516, PCA9518,P82B96, P82B715Abstract - Philips Semiconductors family of Repeaters, Hubs and Expanders are detailed in this application notethat discusses device operation, maximum cable length and frequency calculations and typical applications.
標簽：
REPEATERS
SMBus
255
AN
上傳時間：
2013-11-21
上傳用戶：wlcaption
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本文依據(jù)集成電路設(shè)計方法學(xué)，探討了一種基于標準Intel 8086 微處理器的單芯片計算機平臺的架構(gòu)。研究了其與SDRAM，8255 并行接口等外圍IP 的集成，并在對AMBA協(xié)議和8086 CPU分析的基礎(chǔ)上，采用遵從AMBA傳輸協(xié)議的系統(tǒng)總線代替?zhèn)鹘y(tǒng)的8086 CPU三總線結(jié)構(gòu)，搭建了基于8086 IP 軟核的單芯片計算機系統(tǒng)，并實現(xiàn)了FPGA 功能演示。關(guān)鍵詞：微處理器； SoC；單芯片計算機；AMBA 協(xié)議
Design of 8086 CPU Based Computer-on-a-chip System（School of Electrical Engineering and Automation, Heifei University of Technology, Hefei, 230009,China）Abstract: According to the IC design methodology, this paper discusses the design of one kind of Computer-on-a-chip system architecture, which is based on the standard Intel8086 microprocessor,investigates how to integrate the 8086 CPU and peripheral IP such as, SDRAM controller, 8255 PPI etc. Based on the analysis of the standard Intel8086 microprocessor and AMBA Specification,the Computer-on-a-chip system based on 8086 CPU which uses AMBA bus instead of traditional three-bus structure of 8086 CPU is constructed, and the FPGA hardware emulation is fulfilled.Key words: Microprocessor; SoC; Computer-on-a-chip; AMBA Specification
標簽：
8086
CPU
單芯片
計算機系統(tǒng)
上傳時間：
2013-12-27
上傳用戶：kernor
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This white paper discusses how market trends, the need for increased productivity, and new legislation have
accelerated the use of safety systems in industrial machinery. This TÜV-qualified FPGA design methodology is
changing the paradigms of safety designs and will greatly reduce development effort, system complexity, and time to
market. This allows FPGA users to design their own customized safety controllers and provides a significant
competitive advantage over traditional microcontroller or ASIC-based designs.
Introduction
The basic motivation of deploying functional safety systems is to ensure safe operation as well as safe behavior in
cases of failure. Examples of functional safety systems include train brakes, proximity sensors for hazardous areas
around machines such as fast-moving robots, and distributed control systems in process automation equipment such
as those used in petrochemical plants.
The International Electrotechnical Commission’s standard, IEC 61508: “Functional safety of
electrical/electronic/programmable electronic safety-related systems,” is understood as the standard for designing
safety systems for electrical, electronic, and programmable electronic (E/E/PE) equipment. This standard was
developed in the mid-1980s and has been revised several times to cover the technical advances in various industries.
In addition, derivative standards have been developed for specific markets and applications that prescribe the
particular requirements on functional safety systems in these industry applications. Example applications include
process automation (IEC 61511), machine automation (IEC 62061), transportation (railway EN 50128), medical (IEC
62304), automotive (ISO 26262), power generation, distribution, and transportation.
圖Figure 1. Local Safety System
標簽：
FPGA
安全系統(tǒng)
上傳時間：
2013-11-05
上傳用戶：維子哥哥
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Abstract: This application note discusses the development and deployment of 3G cellular femtocell base stations. The technicalchallenges for last-mile residential connectivity and adding system capacity in dense urban environments are discussed, with 3Gfemtocell base stations as a cost-effective solution. Maxim's 3GPP TS25.104-compliant transceiver solution is presented along withcomplete radio reference designs such as RD2550. For more information on the RD2550, see reference design 5364, "FemtocellRadio Reference Designs Using the MAX2550–MAX2553 Transceivers."
標簽：
Base-Station
Applications
Single-Chip
Transceiver
上傳時間：
2013-11-07
上傳用戶：songrui
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Abstract: This reference design provides design ideas for a cost-effective, low-power liquid-level measurement dataacquisition system (DAS) using a compensated silicon pressure sensor and a high-precision delta-sigma ADC. Thisdocument discusses how to select the compensated silicon pressure sensor, suggest system algorithms, and providenoise analyses. It also describes calibration ideas to improve system performance while also reducing complexity andcost.
標簽：
如何選擇
補償
硅壓力傳感器
上傳時間：
2013-10-08
上傳用戶：sjy1991
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The CodeWarrior Development Suite provides access and technical support to amultitude of CodeWarrior products. In this quick start guide, Section 1 explains howto register your CodeWarrior Development Suite. Section 2 explains how to activateand install one of your products. Section 3 describes what you are entitled to withthe purchase of your CodeWarrior Development Suite, and Section 4 discusses theavailable purchase options. Section 5 describes the benefits of maintaining a currenttechnical support contract, and Section 6 tells you how to access support.
標簽：
CodeWarrior
開發(fā)套件
上傳時間：
2014-03-02
上傳用戶：784533221
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Abstract: Field-programmable gate arrays (FPGAs) are used in a wide variety of applications and end markets, including digital signalprocessing, medical imaging, and high-performance computing. This application note outlines the issues related to powering FPGAs.It also discusses Maxim's solutions for powering Xilinx® FPGAs.
標簽：
Xilinx
FPGA
電源解決方案
上傳時間：
2013-12-16
上傳用戶：haohaoxuexi
