亚洲欧美第一页_禁久久精品乱码_粉嫩av一区二区三区免费野_久草精品视频

蟲蟲首頁| 資源下載| 資源專輯| 精品軟件
登錄| 注冊

Components

  • XL6003 300KHz 36V Boost 3W LED

    The XL6003 regulator is fixed frequency PWM Boost (step-up) DC/DC converter, capable ofdriving 1050mA load current with excellent line and load regulation. The regulator is simple to use because it includes internal frequency compensation and a fixed-frequency oscillator so that it requires a minimum number of external Components to work. The XL6003 could directly drive 5~10 3W LED units at VIN=12V.

    標簽: Boost 6003 300 36V

    上傳時間: 2013-11-07

    上傳用戶:xy@1314

  • PAM2862 1A LED Driver with Int

    The PAM2862 is a continuous mode inductivestep-down converter, designed for driving singleor multiple series connected LEDs efficientlyfrom a voltage source higher than the LEDvoltage. The device operates from an inputupply between 6V and 30V and provides anexternally adjustable output current of up to 1A.Depending upon supply voltage and externalComponents, this can provide up to 24 watts ofoutput power.

    標簽: Driver 2862 with PAM

    上傳時間: 2013-11-16

    上傳用戶:司令部正軍級

  • X-tal oscillators on 8-bit mic

    <Almost since the introduction of microcontrollers as electronic Components there always has been an oscillatorcircuit on the device to make it work. From application point of view only some external Components wererequired to make it work. However, to make sure that it will always work required more effort. This report is basedon feedback from the market from customers applying 8-bit mircrocontrollers.>

    標簽: oscillators X-tal bit mic

    上傳時間: 2013-11-12

    上傳用戶:穿著衣服的大衛

  • 1A SIMPLE STEP-DOWN SWITCHING

    The TL2575 and TL2575HV represent superior alternatives to popular three-terminal linear regulators. Due totheir high efficiency, the devices significantly reduce the size of the heatsink and, in many cases, no heatsink isrequired. Optimized for use with standard series of inductors available from several different manufacturers, theTL2575 and TL2575HV greatly simplify the design of switch-mode power supplies by requiring a minimaladdition of only four to six external Components for operation.

    標簽: STEP-DOWN SWITCHING SIMPLE 1A

    上傳時間: 2013-11-20

    上傳用戶:jelenecheung

  • 基于PIC單片機的低功耗讀卡器硬件設計

    基于PIC單片機的低功耗讀卡器硬件設計:本文提出了一個完整的基于串口的智能讀卡器子系統設計方案并將其實現。讀卡器的設計突出了小型化的要求,全部器件使用貼片封裝。為了減小讀卡器的體積,設計中還使用了串口竊電的技術,使用串口信號線直接給讀卡器供電。為此,讀卡器使用了省電的設計,采用了省電的集成電路,并大膽簡化了許多傳統的設計電路。關鍵字: 讀卡器, 單片機, 串口竊電 Abstract: This paper aims to put forward a complete design of Smart IC card reader based onSerial Port and propose the way of realizing it for the purpose of Network Security. SMD isadopted to make Smart IC reader smaller in this design. To reduce the volume of Smart ICreader, Serial Port powered technology is employed to get power from the signal line of Serial Port. For this reason, low-power consumption Components are adopted in the design and some traditional designs are simplified to reduce the power consumption.Keywords: Card Reader; Single-chip Computer; Serial Port Powered IC 卡系統保存了加密算法所需要的工作密鑰,供加密算法對網絡上傳輸的數據加密使用,是整個系統網絡安全的核心。在IC 卡子系統中,讀卡器是一個重要的部分。它起著管理IC卡、在IC 卡和PC或網絡計算機間傳遞數據的重要作用。本文以一片PIC單片機為核心完成了基于RS232 串口的讀卡器的硬件設計。

    標簽: PIC 單片機 低功耗 讀卡器

    上傳時間: 2014-04-14

    上傳用戶:wanghui2438

  • Emulating a synchronous serial

    The C500 microcontroller family usually provides only one on-chip synchronous serialchannel (SSC). If a second SSC is required, an emulation of the missing interface mayhelp to avoid an external hardware solution with additional electronic Components.The solution presented in this paper and in the attached source files emulates the mostimportant SSC functions by using optimized SW routines with a performance up to 25KBaud in Slave Mode with half duplex transmission and an overhead less than 60% atSAB C513 with 12 MHz. Due to the implementation in C this performance is not the limitof the chip. A pure implementation in assembler will result in a strong reduction of theCPU load and therefore increase the maximum speed of the interface. In addition,microcontrollers like the SAB C505 will speed up the interface by a factor of two becauseof an optimized architecture compared with the SAB C513.Moreover, this solution lays stress on using as few on-chip hardware resources aspossible. A more excessive consumption of those resources will result in a highermaximum speed of the emulated interface.Due to the restricted performance of an 8 bit microcontroller a pin compatible solution isprovided only; the internal register based programming interface is replaced by a set ofsubroutine calls.The attached source files also contain a test shell, which demonstrates how to exchangeinformation between an on-chip HW-SSC and the emulated SW-SSC via 5 external wiresin different operation modes. It is based on the SAB C513 (Siemens 8 bit microcontroller).A table with load measurements is presented to give an indication for the fraction of CPUperformance required by software for emulating the SSC.

    標簽: synchronous Emulating serial

    上傳時間: 2014-01-31

    上傳用戶:z1191176801

  • Input Signal Rise and Fall Tim

    All inputs of the C16x family have Schmitt-Trigger input characteristics. These Schmitt-Triggers are intended to always provide proper internal low and high levels, even if anundefined voltage level (between TTL-VIL and TTL-VIH) is externally applied to the pin.The hysteresis of these inputs, however, is very small, and can not be properly used in anapplication to suppress signal noise, and to shape slow rising/falling input transitions.Thus, it must be taken care that rising/falling input signals pass the undefined area of theTTL-specification between VIL and VIH with a sufficient rise/fall time, as generally usualand specified for TTL Components (e.g. 74LS series: gates 1V/us, clock inputs 20V/us).The effect of the implemented Schmitt-Trigger is that even if the input signal remains inthe undefined area, well defined low/high levels are generated internally. Note that allinput signals are evaluated at specific sample points (depending on the input and theperipheral function connected to it), at that signal transitions are detected if twoconsecutive samples show different levels. Thus, only the current level of an input signalat these sample points is relevant, that means, the necessary rise/fall times of the inputsignal is only dependant on the sample rate, that is the distance in time between twoconsecutive evaluation time points. If an input signal, for instance, is sampled throughsoftware every 10us, it is irrelevant, which input level would be seen between thesamples. Thus, it would be allowable for the signal to take 10us to pass through theundefined area. Due to the sample rate of 10us, it is assured that only one sample canoccur while the signal is within the undefined area, and no incorrect transition will bedetected. For inputs which are connected to a peripheral function, e.g. capture inputs, thesample rate is determined by the clock cycle of the peripheral unit. In the case of theCAPCOM unit this means a sample rate of 400ns @ 20MHz CPU clock. This requiresinput signals to pass through the undefined area within these 400ns in order to avoidmultiple capture events.For input signals, which do not provide the required rise/fall times, external circuitry mustbe used to shape the signal transitions.In the attached diagram, the effect of the sample rate is shown. The numbers 1 to 5 in thediagram represent possible sample points. Waveform a) shows the result if the inputsignal transition time through the undefined TTL-level area is less than the time distancebetween the sample points (sampling at 1, 2, 3, and 4). Waveform b) can be the result ifthe sampling is performed more than once within the undefined area (sampling at 1, 2, 5,3, and 4).Sample points:1. Evaluation of the signal clearly results in a low level2. Either a low or a high level can be sampled here. If low is sampled, no transition willbe detected. If the sample results in a high level, a transition is detected, and anappropriate action (e.g. capture) might take place.3. Evaluation here clearly results in a high level. If the previous sample 2) had alreadydetected a high, there is no change. If the previous sample 2) showed a low, atransition from low to high is detected now.

    標簽: Signal Input Fall Rise

    上傳時間: 2013-10-23

    上傳用戶:copu

  • 介紹C16x系列微控制器的輸入信號升降時序圖及特性

    All inputs of the C16x family have Schmitt-Trigger input characteristics. These Schmitt-Triggers are intended to always provide proper internal low and high levels, even if anundefined voltage level (between TTL-VIL and TTL-VIH) is externally applied to the pin.The hysteresis of these inputs, however, is very small, and can not be properly used in anapplication to suppress signal noise, and to shape slow rising/falling input transitions.Thus, it must be taken care that rising/falling input signals pass the undefined area of theTTL-specification between VIL and VIH with a sufficient rise/fall time, as generally usualand specified for TTL Components (e.g. 74LS series: gates 1V/us, clock inputs 20V/us).The effect of the implemented Schmitt-Trigger is that even if the input signal remains inthe undefined area, well defined low/high levels are generated internally. Note that allinput signals are evaluated at specific sample points (depending on the input and theperipheral function connected to it), at that signal transitions are detected if twoconsecutive samples show different levels. Thus, only the current level of an input signalat these sample points is relevant, that means, the necessary rise/fall times of the inputsignal is only dependant on the sample rate, that is the distance in time between twoconsecutive evaluation time points. If an input signal, for instance, is sampled throughsoftware every 10us, it is irrelevant, which input level would be seen between thesamples. Thus, it would be allowable for the signal to take 10us to pass through theundefined area. Due to the sample rate of 10us, it is assured that only one sample canoccur while the signal is within the undefined area, and no incorrect transition will bedetected. For inputs which are connected to a peripheral function, e.g. capture inputs, thesample rate is determined by the clock cycle of the peripheral unit. In the case of theCAPCOM unit this means a sample rate of 400ns @ 20MHz CPU clock. This requiresinput signals to pass through the undefined area within these 400ns in order to avoidmultiple capture events.

    標簽: C16x 微控制器 輸入信號 時序圖

    上傳時間: 2014-04-02

    上傳用戶:han_zh

  • Reading and Writing iButtons v

    Abstract: This application note explains the hardware of different types of 1-Wire® interfaces and software examples adapted to this hardware with a focus on serial ports. Depending on the types of iButtons required for a project and the type of computer to be used, the most economical interface is easily found. The hardware examples shown are basically two different types: 5V general interface and 12V RS-232 interface. Within the 5V group a common printed circuit board could be used for all circuits described. The variations can be achieved by different populations of Components. The same principal is used for the 12V RS-232 interface. The population determines if it is a Read all or a Read/Write all type of interface. There are other possible circuit implementations to create a 1-Wire interface. The circuits described in this application note cover many different configurations. For a custom application, one of the described options can be adapted to meet individual needs.

    標簽: iButtons Reading Writing and

    上傳時間: 2013-10-29

    上傳用戶:long14578

  • 68HC05K0 Infra-red Remote Cont

    The MC68HC05K0 is a low cost, low pin countsingle chip microcomputer with 504 bytes of userROM and 32 bytes of RAM. The MC68HC05K0 isa member of the 68HC05K series of devices whichare available in 16-pin DIL or SOIC packages.It uses the same CPU as the other devices in the68HC05 family and has the same instructions andregisters. Additionally, the device has a 15-stagemulti-function timer and 10 general purposebi-directional I/0 lines. A mask option is availablefor software programmable pull-downs on all ofthe I/O pins and four of the pins are capable ofgenerating interrupts.The device is ideally suited for remote-controlkeyboard applications because the pull-downs andthe interrupt drivers on the port pins allowkeyboards to be built without any externalComponents except the keys themselves. There isno need for external pull-up or pull-down resistors,or diodes for wired-OR interrupts, as these featuresare already designed into the device.

    標簽: Infra-red Remote Cont 05K

    上傳時間: 2014-01-24

    上傳用戶:zl5712176

亚洲欧美第一页_禁久久精品乱码_粉嫩av一区二区三区免费野_久草精品视频
欧美日韩国产丝袜另类| 在线观看的日韩av| 亚洲欧洲日韩在线| 欧美日韩一区免费| 欧美一级淫片aaaaaaa视频| 黑人极品videos精品欧美裸| 欧美区一区二| 久久视频国产精品免费视频在线 | 亚洲欧美bt| 很黄很黄激情成人| 欧美日韩国产一区| 久久乐国产精品| 亚洲欧美日韩一区| 亚洲精品影视| 在线观看亚洲视频| 国产欧美精品一区aⅴ影院| 欧美日韩大片| 久久五月天婷婷| 午夜精品久久久久久久99黑人| 好看的日韩av电影| 国产欧美日韩亚洲精品| 欧美亚男人的天堂| 欧美日韩精品一本二本三本| 久久亚洲精品网站| 欧美影院成年免费版| 亚洲欧美日韩中文播放| 亚洲小说欧美另类社区| 一色屋精品视频在线看| 国内精品免费在线观看| 国产精品亚洲综合色区韩国| 国产精品久久久久久久久动漫| 欧美日韩伦理在线| 欧美日韩免费观看一区二区三区 | 亚洲精品1234| 一区二区三区我不卡| 狠狠操狠狠色综合网| 狠狠色丁香婷婷综合| 伊人成人在线视频| 国产精品高潮在线| 国产精品久久久久久影视| 欧美视频日韩视频| 国产精品久久久久久久久久久久 | 亚洲小视频在线| 亚洲乱码精品一二三四区日韩在线 | 欧美视频二区| 欧美日韩天堂| 国产精品sss| 欧美国产日韩一区二区三区| 久久久夜精品| 久久野战av| 母乳一区在线观看| 欧美国产日韩在线| 欧美日韩精品久久久| 国产精品卡一卡二卡三| 国产欧美精品| 亚洲国产精品小视频| 这里是久久伊人| 午夜精品久久久久久久99黑人| 韩日精品中文字幕| 亚洲欧洲三级| 亚洲在线播放电影| 久久久xxx| 欧美日韩精品综合在线| 国产精品美女久久久久久久| 国模私拍一区二区三区| 亚洲三级观看| 亚洲欧美日韩精品久久久| 久久精品欧美日韩精品| 欧美91视频| 国产精品永久免费视频| 伊人色综合久久天天五月婷| ●精品国产综合乱码久久久久| 日韩视频亚洲视频| 欧美呦呦网站| 欧美人与性动交α欧美精品济南到| 国产精品国产三级国产| 国产日韩欧美a| 亚洲精品欧美极品| 欧美一区二区三区免费大片| 欧美激情中文字幕一区二区| 国产精品久久久久av| 在线免费一区三区| 亚洲美女淫视频| 欧美中在线观看| 欧美日韩高清在线播放| 韩国v欧美v日本v亚洲v| 亚洲小少妇裸体bbw| 男人的天堂亚洲| 国产一区二区三区四区hd| 9国产精品视频| 欧美成人四级电影| 国内精品久久久久影院 日本资源| 久久久久欧美精品| 欧美在线在线| 99日韩精品| 中文日韩电影网站| 亚洲永久网站| 久久久av水蜜桃| 欧美金8天国| 国模一区二区三区| 亚洲欧美日本伦理| 欧美日韩一区二区免费视频| 狠狠噜噜久久| 国自产拍偷拍福利精品免费一| 欧美精品一区二区三区四区| 国产精品卡一卡二卡三| 欧美成人三级在线| 日韩视频专区| 亚洲国产天堂久久综合网| 久久久国产一区二区| 亚洲国产婷婷综合在线精品| 一区二区国产精品| 欧美一区二区在线免费播放| 女同性一区二区三区人了人一| 国产精品久久久久久久久久久久久久| 国产情侣一区| 亚洲精品之草原avav久久| 你懂的成人av| 亚洲国产欧美久久| 久久精品导航| 欧美性淫爽ww久久久久无| 亚洲国产91精品在线观看| 久久精品免费电影| 国产女主播一区二区| 亚洲激情欧美激情| 欧美成人小视频| 99精品视频免费观看视频| 欧美日韩成人在线播放| 亚洲精品国久久99热| 欧美日韩mp4| 狠狠色噜噜狠狠色综合久| 亚洲视频大全| 国产精品高潮呻吟| 亚洲肉体裸体xxxx137| 欧美一区二区精美| 免费亚洲一区二区| 亚洲老司机av| 国产欧美一区二区白浆黑人| 99精品视频网| 亚洲日本一区二区| 激情综合网址| 欧美网站大全在线观看| 在线成人av网站| 国产精品亚洲一区| 久久视频一区二区| 亚洲精品国偷自产在线99热| 韩国av一区二区三区四区| 欧美精品激情| 欧美a级理论片| 欧美α欧美αv大片| 男人的天堂亚洲| 欧美精品www| 欧美日韩免费观看中文| 欧美主播一区二区三区| 在线免费观看一区二区三区| 国产色综合久久| 尹人成人综合网| 欧美精品一区二| 国产精品伦子伦免费视频| 亚洲日本中文字幕| 母乳一区在线观看| 影音先锋久久精品| 欧美一区在线视频| 国产视频综合在线| 欧美系列精品| 免费日韩一区二区| 巨乳诱惑日韩免费av| 亚洲欧美三级在线| 久久精品91| 久久久久久网址| 欧美了一区在线观看| 欧美日韩国产成人高清视频| 久久久久久久一区二区| 欧美一区二区三区的| 久久久亚洲午夜电影| 欧美日韩国产黄| 国产精品视频自拍| 黄色日韩网站| 午夜精品成人在线视频| 欧美 日韩 国产在线| 国产精品入口尤物| 国产亚洲欧美另类中文| 亚洲一区二区视频在线观看| 亚洲免费人成在线视频观看| 欧美一级免费视频| 欧美黑人多人双交| 狠狠久久五月精品中文字幕| 在线一区免费观看| 欧美一区综合| 欧美日韩一区二区欧美激情| 在线观看成人网| 久久久久国内| 欧美日精品一区视频| 亚洲国产日韩一区二区| 久久激情综合| 国户精品久久久久久久久久久不卡| 一区二区三区精密机械公司 | 亚洲精品久久久久久一区二区| 午夜精品一区二区三区在线视| 欧美电影免费观看网站|