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industry-proven

  • 高性能DCDC控制器

    We provide complete power solutions with a full lineup of power managementproducts. This brochure provides an overview of our high performance DC/DC switching regulatorcontrollers for applications including datacom, telecom, industrial, automotive, medical, avionicsand control systems. We make power design easier with our industry-leading field applicationengineering support; a broad selection of demonstration boards with schematics, layout filesand parts lists; SwitcherCAD® software for simulation, application notes and comprehensivetechnical documentation.

    標(biāo)簽: DCDC 性能 控制器

    上傳時(shí)間: 2013-10-15

    上傳用戶:lz4v4

  • 信號(hào)源,調(diào)節(jié)器和電源電路分析

      Occasionally, we are tasked with designing circuitry for aspecific purpose. The request may have customer originsor it may be an in-house requirement. Alternately, a circuitmay be developed because its possibility is simply tooattractive to ignore1. Over time, these circuits accumulate,encompassing a wide and useful body of proven capabilities.They also represent substantial effort. These considerationsmake publication an almost obligatory propositionand, as such, a group of circuits is presented here. This isnot the first time we have displayed such wares and, giventhe encouraging reader response, it will not be the last2.Eighteen circuits are included in this latest effort, roughlyarranged in the categories given in this publication’s title.They appear at the next paragraph.

    標(biāo)簽: 信號(hào)源 調(diào)節(jié)器 電源 電路分析

    上傳時(shí)間: 2013-11-12

    上傳用戶:012345

  • 基于瑞薩電子微控制器的溫度控制系統(tǒng)設(shè)計(jì)

      為了提高傳統(tǒng)溫度控制系統(tǒng)的性能,將PID控制理論與嵌入式系統(tǒng)相結(jié)合,采用瑞薩電子公司的H8S/2166作為核心處理器,AD公司的AD7705以及熱敏電阻溫度傳感器作為溫度檢測(cè)單元,利用4×6小鍵盤(pán)、LCD顯示器和S1D13305液晶控制器達(dá)到良好的人機(jī)交互,設(shè)計(jì)出了一個(gè)應(yīng)用于化工領(lǐng)域的嵌入式實(shí)時(shí)溫度控制系統(tǒng)。相比于傳統(tǒng)溫度控制系統(tǒng),該系統(tǒng)提供了更強(qiáng)的計(jì)算能力和可擴(kuò)展能力,采用增量PID控制算法實(shí)現(xiàn)復(fù)雜控制。通過(guò)實(shí)驗(yàn),該系統(tǒng)能達(dá)到0.1 ℃的溫度控制精度以及小于120 s的溫度穩(wěn)定時(shí)間。   Abstract:   In order to improve the performance of conventional temperature control system, combining PID control theory with embedded systems, using the Renesas Electronics Corp. H8S/2166 micro-controller as a core processors, AD7705 and thermistor temperature sensor as a temperature detection unit and 4×6 small keyboard, LCD and S1D13305 LCD controller as a good human-computer interaction, this paper designed an embedded real-time temperature control system which is applied in chemical industry. Compared with conventional temperature control system, this system provides more computing power and extensibility, and adopts PID control algorithm for complex control. Through the experiment, the system can reach temperature control accuracy of 0.1 ℃ and temperature stabilization time of less than 120 seconds.

    標(biāo)簽: 瑞薩電子 微控制器 溫度控制 系統(tǒng)設(shè)計(jì)

    上傳時(shí)間: 2014-12-26

    上傳用戶:003030

  • 基于C8051F340的數(shù)據(jù)采集器設(shè)計(jì)

    針對(duì)眾多低成本數(shù)據(jù)采集需求,采用帶有片上USB控制器和D/A轉(zhuǎn)換器的混合信號(hào)微處理器C8051F340,設(shè)計(jì)了一款可通過(guò)USB接口和LabVIEW圖形用戶界面實(shí)現(xiàn)與PC機(jī)聯(lián)機(jī)的數(shù)據(jù)采集器,同時(shí)借助系統(tǒng)的SD卡存儲(chǔ)獨(dú)立實(shí)現(xiàn)現(xiàn)場(chǎng)長(zhǎng)時(shí)間采集數(shù)據(jù)。該數(shù)據(jù)采集器成本低,結(jié)構(gòu)簡(jiǎn)單,體積小,已成功用于工業(yè)現(xiàn)場(chǎng)。 Abstract:  Aiming at the need of low cost data acquisition, a data acquisition device is designed based on C8051F340 which is a mixed-signal microcontroller and integrates USB controller and A/D controller on a chip.The data acquisition device which can combine with PC by USB interface and LabVIEW graphical user interface,can realize data acquisition. At the same time,it can be solely run a long time in virtue of SD card in field.The date aequisition device features low cost,simple structure and little sharp, and it has been used in industry field.

    標(biāo)簽: C8051F340 數(shù)據(jù) 集器設(shè)計(jì)

    上傳時(shí)間: 2014-05-31

    上傳用戶:1109003457

  • TJA1042 High-speed CAN transce

    The TJA1042 is a high-speed CAN transceiver that provides an interface between aController Area Network (CAN) protocol controller and the physical two-wire CAN bus.The transceiver is designed for high-speed (up to 1 Mbit/s) CAN applications in theautomotive industry, providing the differential transmit and receive capability to (amicrocontroller with) a CAN protocol controller.

    標(biāo)簽: High-speed transce 1042 TJA

    上傳時(shí)間: 2014-12-28

    上傳用戶:氣溫達(dá)上千萬(wàn)的

  • TJA1051 High-speed CAN transce

    The TJA1051 is a high-speed CAN transceiver that provides an interface between aController Area Network (CAN) protocol controller and the physical two-wire CAN bus.The transceiver is designed for high-speed (up to 1 Mbit/s) CAN applications in theautomotive industry, providing differential transmit and receive capability to (amicrocontroller with) a CAN protocol controller.

    標(biāo)簽: High-speed transce 1051 TJA

    上傳時(shí)間: 2013-10-17

    上傳用戶:jisujeke

  • 多功能高集成外圍器件

     多功能高集成外圍器件6. 1  多功能高集成外圍器件82371PCI的英文名稱:Peripheral Component Interconnect (外圍部件互聯(lián)PCI總線);82371是PCI總線組件。ISA是:Industry Standard Architecture(工業(yè)標(biāo)準(zhǔn)體系結(jié)構(gòu))IDE是 (Integrated Device Electronics)集成電路設(shè)備簡(jiǎn)稱PIIX4PIIX4器件(芯片)的特點(diǎn)1、是一種支持Pentium和PentiumII微處理器的部件。2、82371對(duì)ISA橋來(lái)說(shuō),是一種多功能PCI總線。3、對(duì)可移動(dòng)性和桌面深綠色環(huán)境均提供支持。4、電源管理邏輯。5、被集成化的IDE控制器。6、增強(qiáng)了性能的DMA控制器。 (7)基于兩個(gè)82C59的中斷控制器。(8)基于82C54芯片的定時(shí)器。(9)USB(Universal Serial Bus)通用串行總線。(10)SMBus系統(tǒng)管理總線。(11)實(shí)時(shí)時(shí)鐘(12)順應(yīng)Microsoft Win95所需的功能其芯片的邏輯框圖如圖6-1所示。    PIIX4芯片邏輯框圖6.1.1   概述PIIX4芯片是一個(gè)多功能的PCI器件,圖6-2 是82371在系統(tǒng)中扮演的角色。(續(xù)上圖)1. PCI與EIO之間的橋(PIIX4芯片)橋是不對(duì)程的,是各類不同標(biāo)準(zhǔn)總線與PCI總線連接,82371AB橋也可理解為一種總線轉(zhuǎn)換譯碼器和控制器,橋內(nèi)包含復(fù)雜的協(xié)議總線信號(hào)和緩沖器。(1).在PCI系統(tǒng)內(nèi),當(dāng)PIIX4操作時(shí),它總是作為系統(tǒng)內(nèi)各種模塊的主控設(shè)備,如USB和DMA控制器、IDE總線和分布式DMA的主控設(shè)備等,而且總是以ISA主控設(shè)備的名義出現(xiàn)。(2).  在向ISA總線或IDE總線進(jìn)行傳送操作的傳送周期期間作為從屬設(shè)備使用,并對(duì)內(nèi)部寄存器譯碼。PIIX4芯片(橋)的配置(1).可以把PIIX4芯片配置成整個(gè)ISA總線,或ISA總線的子集,也可擴(kuò)展成EIO總線。在使用EIO總線時(shí),可以把未使用的信號(hào)配置成通用的輸入和輸出。(2).PIIX4可直接驅(qū)動(dòng)5個(gè)ISA插槽;(3).能提供字節(jié)-交換邏輯、I/O的恢復(fù)支持、等待狀態(tài)的生成以及SYSCLK的生成。(4).提供X-BUS鍵盤(pán)控制器芯片、BIOS芯片、實(shí)時(shí)時(shí)鐘芯片、二級(jí)微程序器等的選擇。2.  IDE接口(總線主控設(shè)備的權(quán)利和同步DMA方式)IDE接口為4個(gè)IDE的設(shè)備提供支持,比如IDE接口的硬盤(pán)和CD-ROM等。注意:目前硬盤(pán)接口有5類:IDE、SCSI、Fibre Channel、IEEE1394和USB等。IDE口幾乎在PC機(jī)最多,因?yàn)楸阋恕CSI多用于服務(wù)器和集群機(jī)。IDE的PIO IDE速率:14MB/s;而總線主控設(shè)備IDE的速率:33MB/s在PIIX4芯片的IDE系統(tǒng)內(nèi),配有兩個(gè)各次獨(dú)立的IDE信號(hào)通道。3. 具有兼容性的模塊—DMA、定時(shí)器/計(jì)數(shù)器、中斷控制器等(1)在PIIX4內(nèi)的兩各82C37 DMA控制器經(jīng)邏輯的組合,產(chǎn)生7個(gè)獨(dú)立的可編程通道。通道[0:3]是通過(guò)與8個(gè)二進(jìn)位的硬件連線實(shí)現(xiàn)的。通過(guò)以字節(jié)為單位的計(jì)數(shù)進(jìn)行傳送。而通道[5:7]是通過(guò)16個(gè)二進(jìn)位的連線實(shí)現(xiàn)的,以字為單位的計(jì)數(shù)進(jìn)行傳送。(2)DMA控制器還能通過(guò)PCI總線,處理舊的DMA的兩個(gè)不同的方法提供支持。(3)計(jì)數(shù)/定時(shí)器模塊在功能上與82C54等價(jià)。(4)中斷控制器與ISA兼容,其功能是兩個(gè)82C59的功能之和。

    標(biāo)簽: 多功能 外圍器件 集成

    上傳時(shí)間: 2013-11-19

    上傳用戶:3到15

  • 微型計(jì)算機(jī)總線知識(shí)

    計(jì)算機(jī)部件要具有通用性,適應(yīng)不同系統(tǒng)與不同用戶的需求,設(shè)計(jì)必須模塊化。計(jì)算機(jī)部件產(chǎn)品(模塊)供應(yīng)出現(xiàn)多元化。模塊之間的聯(lián)接關(guān)系要標(biāo)準(zhǔn)化,使模塊具有通用性。模塊設(shè)計(jì)必須基于一種大多數(shù)廠商認(rèn)可的模塊聯(lián)接關(guān)系,即一種總線標(biāo)準(zhǔn)。總線的標(biāo)準(zhǔn)總線是一類信號(hào)線的集合是模塊間傳輸信息的公共通道,通過(guò)它,計(jì)算機(jī)各部件間可進(jìn)行各種數(shù)據(jù)和命令的傳送。為使不同供應(yīng)商的產(chǎn)品間能夠互換,給用戶更多的選擇,總線的技術(shù)規(guī)范要標(biāo)準(zhǔn)化。總線的標(biāo)準(zhǔn)制定要經(jīng)周密考慮,要有嚴(yán)格的規(guī)定。總線標(biāo)準(zhǔn)(技術(shù)規(guī)范)包括以下幾部分:機(jī)械結(jié)構(gòu)規(guī)范:模塊尺寸、總線插頭、總線接插件以及按裝尺寸均有統(tǒng)一規(guī)定。功能規(guī)范:總線每條信號(hào)線(引腳的名稱)、功能以及工作過(guò)程要有統(tǒng)一規(guī)定。電氣規(guī)范:總線每條信號(hào)線的有效電平、動(dòng)態(tài)轉(zhuǎn)換時(shí)間、負(fù)載能力等。總線的發(fā)展情況S-100總線:產(chǎn)生于1975年,第一個(gè)標(biāo)準(zhǔn)化總線,為微計(jì)算機(jī)技術(shù)發(fā)展起到了推動(dòng)作用。IBM-PC個(gè)人計(jì)算機(jī)采用總線結(jié)構(gòu)(Industry Standard Architecture, ISA)并成為工業(yè)化的標(biāo)準(zhǔn)。先后出現(xiàn)8位ISA總線、16位ISA總線以及后來(lái)兼容廠商推出的EISA(Extended ISA)32位ISA總線。為了適應(yīng)微處理器性能的提高及I/O模塊更高吞吐率的要求,出現(xiàn)了VL-Bus(VESA Local Bus)和PCI(Peripheral Component Interconnect,PCI)總線。適合小型化要求的PCMCIA(Personal Computer Memory Card International Association)總線,用于筆記本計(jì)算機(jī)的功能擴(kuò)展。總線的指標(biāo)計(jì)算機(jī)主機(jī)性能迅速提高,各功能模塊性能也要相應(yīng)提高,這對(duì)總線性能提出更高的要求。總線主要技術(shù)指標(biāo)有幾方面:總線寬度:一次操作可以傳輸?shù)臄?shù)據(jù)位數(shù),如S100為8位,ISA為16位,EISA為32位,PCI-2可達(dá)64位。總線寬度不會(huì)超過(guò)微處理器外部數(shù)據(jù)總線的寬度。總數(shù)工作頻率:總線信號(hào)中有一個(gè)CLK時(shí)鐘,CLK越高每秒鐘傳輸?shù)臄?shù)據(jù)量越大。ISA、EISA為8MHz,PCI為33.3MHz, PCI-2可達(dá)達(dá)66.6MHz。單個(gè)數(shù)據(jù)傳輸周期:不同的傳輸方式,每個(gè)數(shù)據(jù)傳輸所用CLK周期數(shù)不同。ISA要2個(gè),PCI用1個(gè)CLK周期。這決定總線最高數(shù)據(jù)傳輸率。5. 總線的分類與層次系統(tǒng)總線:是微處理器芯片對(duì)外引線信號(hào)的延伸或映射,是微處理器與片外存儲(chǔ)器及I/0接口傳輸信息的通路。系統(tǒng)總線信號(hào)按功能可分為三類:地址總線(Where):指出數(shù)據(jù)的來(lái)源與去向。地址總線的位數(shù)決定了存儲(chǔ)空間的大小。系統(tǒng)總線:數(shù)據(jù)總線(What)提供模塊間傳輸數(shù)據(jù)的路徑,數(shù)據(jù)總線的位數(shù)決定微處理器結(jié)構(gòu)的復(fù)雜度及總體性能。控制總線(When):提供系統(tǒng)操作所必需的控制信號(hào),對(duì)操作過(guò)程進(jìn)行控制與定時(shí)。擴(kuò)充總線:亦稱設(shè)備總線,用于系統(tǒng)I/O擴(kuò)充。與系統(tǒng)總線工作頻率不同,經(jīng)接口電路對(duì)系統(tǒng)總統(tǒng)信號(hào)緩沖、變換、隔離,進(jìn)行不同層次的操作(ISA、EISA、MCA)局部總線:擴(kuò)充總線不能滿足高性能設(shè)備(圖形、視頻、網(wǎng)絡(luò))接口的要求,在系統(tǒng)總線與擴(kuò)充總線之間插入一層總線。由于它經(jīng)橋接器與系統(tǒng)總線直接相連,因此稱之為局部總線(PCI)。

    標(biāo)簽: 微型計(jì)算機(jī) 總線

    上傳時(shí)間: 2013-11-09

    上傳用戶:nshark

  • at89c52 pdf

    The AT89C52 is a low-power, high-performance CMOS 8-bit microcomputer with 8Kbytes of Flash programmable and erasable read only memory (PEROM). The deviceis manufactured using Atmel’s high-density nonvolatile memory technology and iscompatible with the industry-standard 80C51 and 80C52 instruction set and pinout.The on-chip Flash allows the program memory to be reprogrammed in-system or by aconventional nonvolatile memory programmer. By combining a versatile 8-bit CPUwith Flash on a monolithic chip, the Atmel AT89C52 is a powerful microcomputerwhich provides a highly-flexible and cost-effective solution to many embedded controlapplications.

    標(biāo)簽: 89c c52 at

    上傳時(shí)間: 2013-11-10

    上傳用戶:1427796291

  • 使用Artix-7 FPGA 降低您的系統(tǒng)功耗與成本

    As businesses and consumers expect more fromportable electronics, the FPGA industry has beencompelled to re-think how it serves these low-power,cost-sensitive markets. Application classes like

    標(biāo)簽: Artix FPGA 功耗

    上傳時(shí)間: 2013-11-10

    上傳用戶:XLHrest

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