LLCR Pin Socket Testing with the Model 3732 High Density Matrix Card Computer processors (CPUs) today have come a long way from the computer processors of the past. They draw more power, run at lower voltages, and have more pins than ever before.
標(biāo)簽: Testing Socket LLCR with
上傳時(shí)間: 2013-10-24
上傳用戶(hù):whenfly
51單片機(jī)及其應(yīng)用:1.1.1 電子計(jì)算機(jī)的問(wèn)世及其經(jīng)典結(jié)構(gòu)1946年2月15日,第一臺(tái)電子數(shù)字計(jì)算機(jī)問(wèn)世,這標(biāo)志著計(jì)算機(jī)時(shí)代的到來(lái)。(CALCULATOR)ENIAC(“埃尼阿克”)◆ENIAC是電子管計(jì)算機(jī),時(shí)鐘頻率僅有100 KHz,但能在1秒鐘的時(shí)間內(nèi)完成5000次加法運(yùn)算。◆與現(xiàn)代的計(jì)算機(jī)相比,有許多不足,但它的問(wèn)世開(kāi)創(chuàng)了計(jì)算機(jī)科學(xué)技術(shù)的新紀(jì)元,對(duì)人類(lèi)的生產(chǎn)和生活方式產(chǎn)生了巨大的影響 。 匈牙利籍?dāng)?shù)學(xué)家馮·諾依曼在方案的設(shè)計(jì)上做出了重要的貢獻(xiàn)。1946年6月,他又提出了“程序存儲(chǔ)”和“二進(jìn)制運(yùn)算”的思想,進(jìn)一步構(gòu)建了計(jì)算機(jī)由運(yùn)算器、控制器、存儲(chǔ)器、輸入設(shè)備和輸出設(shè)備組成這一計(jì)算機(jī)的經(jīng)典結(jié)構(gòu)。(EDVAC-ELECTRONIC DISCRETE VARIABLE AUTOMATIC COMPUTER)二、微型計(jì)算機(jī)的應(yīng)用形態(tài) 從應(yīng)用形態(tài)上,微機(jī)可以分成三種:
標(biāo)簽: 51單片機(jī)
上傳時(shí)間: 2013-12-20
上傳用戶(hù):d815185728
本文依據(jù)集成電路設(shè)計(jì)方法學(xué),探討了一種基于標(biāo)準(zhǔn)Intel 8086 微處理器的單芯片計(jì)算機(jī)平臺(tái)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(duì)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(xiàn)代替?zhèn)鹘y(tǒng)的8086 CPU三總線(xiàn)結(jié)構(gòu),搭建了基于8086 IP 軟核的單芯片計(jì)算機(jī)系統(tǒng),并實(shí)現(xiàn)了FPGA 功能演示。關(guān)鍵詞:微處理器; SoC;單芯片計(jì)算機(jī);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(biāo)簽: 8086 CPU 單芯片 計(jì)算機(jī)系統(tǒng)
上傳時(shí)間: 2013-12-27
上傳用戶(hù):kernor
基于PIC單片機(jī)的低功耗讀卡器硬件設(shè)計(jì):本文提出了一個(gè)完整的基于串口的智能讀卡器子系統(tǒng)設(shè)計(jì)方案并將其實(shí)現(xiàn)。讀卡器的設(shè)計(jì)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(shè)計(jì)中還使用了串口竊電的技術(shù),使用串口信號(hào)線(xiàn)直接給讀卡器供電。為此,讀卡器使用了省電的設(shè)計(jì),采用了省電的集成電路,并大膽簡(jiǎn)化了許多傳統(tǒng)的設(shè)計(jì)電路。關(guān)鍵字: 讀卡器, 單片機(jī), 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(tǒng)保存了加密算法所需要的工作密鑰,供加密算法對(duì)網(wǎng)絡(luò)上傳輸?shù)臄?shù)據(jù)加密使用,是整個(gè)系統(tǒng)網(wǎng)絡(luò)安全的核心。在IC 卡子系統(tǒng)中,讀卡器是一個(gè)重要的部分。它起著管理IC卡、在IC 卡和PC或網(wǎng)絡(luò)計(jì)算機(jī)間傳遞數(shù)據(jù)的重要作用。本文以一片PIC單片機(jī)為核心完成了基于RS232 串口的讀卡器的硬件設(shè)計(jì)。
上傳時(shí)間: 2014-04-14
上傳用戶(hù):wanghui2438
一種實(shí)用的微機(jī)自動(dòng)配料秤系統(tǒng):介紹一種由單片機(jī)構(gòu)成的配料秤。敘述了秤的傳感器、變送器、信號(hào)的變換、硬件原理、軟件流程以及和DCS 系統(tǒng)構(gòu)成的單回路調(diào)節(jié)系統(tǒng),此系統(tǒng)可廣泛地應(yīng)用于各行業(yè)的配料控制中。關(guān)鍵詞:配料秤 單片機(jī) 單回路調(diào)節(jié)系統(tǒng) DCS 系統(tǒng) Abstract :A proportioning weigher based on single chip computer is introduced. Sensors , transmitters , signal converting , principle of hardware ,software flowchart of proportioning weigher and single loop control system composed with DCS system are emphasized ,this system can be used in proportioning control of various trades extensively.Key Words :Proportioning Weigher ,Single Chip Computer ,Single Loop Control System ,Distributed Control System
上傳時(shí)間: 2013-10-12
上傳用戶(hù):zwei41
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(biāo)簽: iButtons Reading Writing and
上傳時(shí)間: 2013-10-29
上傳用戶(hù):long14578
I2C interface, is a very powerful tool for system designers. Theintegrated protocols allow systems to be completely software defined.Software development time of different products can be reduced byassembling a library of reusable software modules. In addition, themultimaster capability allows rapid testing and alignment ofend-products via external connections to an assembly-line computer.The mask programmable 87LPC76X and its EPROM version, the87LPC76X, can operate as a master or a slave device on the I2Csmall area network. In addition to the efficient interface to thededicated function ICs in the I2C family, the on-board interfacefacilities I/O and RAM expansion, access to EEPROM andprocessor-to-processor communications.
標(biāo)簽: microcontro Using 76X LPC
上傳時(shí)間: 2013-12-30
上傳用戶(hù):Artemis
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(hù)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(chǎng)商認(rèn)可的模塊聯(lián)接關(guān)系,即一種總線(xiàn)標(biāo)準(zhǔn)。總線(xiàn)的標(biāo)準(zhǔn)總線(xiàn)是一類(lèi)信號(hào)線(xiàn)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(hù)更多的選擇,總線(xiàn)的技術(shù)規(guī)范要標(biāo)準(zhǔn)化。總線(xiàn)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(xiàn)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(xiàn)插頭、總線(xiàn)接插件以及按裝尺寸均有統(tǒng)一規(guī)定。功能規(guī)范:總線(xiàn)每條信號(hào)線(xiàn)(引腳的名稱(chēng))、功能以及工作過(guò)程要有統(tǒng)一規(guī)定。電氣規(guī)范:總線(xiàn)每條信號(hào)線(xiàn)的有效電平、動(dòng)態(tài)轉(zhuǎn)換時(shí)間、負(fù)載能力等。總線(xiàn)的發(fā)展情況S-100總線(xiàn):產(chǎn)生于1975年,第一個(gè)標(biāo)準(zhǔn)化總線(xiàn),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(xiàn)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(xiàn)、16位ISA總線(xiàn)以及后來(lái)兼容廠(chǎng)商推出的EISA(Extended ISA)32位ISA總線(xiàn)。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(xiàn)。適合小型化要求的PCMCIA(Personal Computer Memory Card International Association)總線(xiàn),用于筆記本計(jì)算機(jī)的功能擴(kuò)展。總線(xiàn)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(xiàn)性能提出更高的要求。總線(xiàn)主要技術(shù)指標(biāo)有幾方面:總線(xiàn)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(xiàn)寬度不會(huì)超過(guò)微處理器外部數(shù)據(jù)總線(xiàn)的寬度。總數(shù)工作頻率:總線(xiàn)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(xiàn)最高數(shù)據(jù)傳輸率。5. 總線(xiàn)的分類(lèi)與層次系統(tǒng)總線(xiàn):是微處理器芯片對(duì)外引線(xiàn)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(xiàn)信號(hào)按功能可分為三類(lèi):地址總線(xiàn)(Where):指出數(shù)據(jù)的來(lái)源與去向。地址總線(xiàn)的位數(shù)決定了存儲(chǔ)空間的大小。系統(tǒng)總線(xiàn):數(shù)據(jù)總線(xiàn)(What)提供模塊間傳輸數(shù)據(jù)的路徑,數(shù)據(jù)總線(xiàn)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(xiàn)(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(xiàn):亦稱(chēng)設(shè)備總線(xiàn),用于系統(tǒng)I/O擴(kuò)充。與系統(tǒng)總線(xiàn)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(xiàn):擴(kuò)充總線(xiàn)不能滿(mǎn)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(xiàn)與擴(kuò)充總線(xiàn)之間插入一層總線(xiàn)。由于它經(jīng)橋接器與系統(tǒng)總線(xiàn)直接相連,因此稱(chēng)之為局部總線(xiàn)(PCI)。
標(biāo)簽: 微型計(jì)算機(jī) 總線(xiàn)
上傳時(shí)間: 2013-11-09
上傳用戶(hù):nshark
基于單片機(jī)的汽車(chē)多功能報(bào)警系統(tǒng)設(shè)計(jì)The Design of Automobile Multi-function AlarmingBased on Single Chip Computer劉法治趙明富寧睡達(dá)(河 南 科 技 學(xué) 院 ,新 鄉(xiāng) 453 00 3)摘要介紹了一種基于單片機(jī)控制的汽車(chē)多功能報(bào)警系統(tǒng),它能對(duì)汽車(chē)的潤(rùn)滑系統(tǒng)油壓、制動(dòng)系統(tǒng)氣壓、冷卻系統(tǒng)溫度、輪胎欠壓及防盜進(jìn)行自動(dòng)檢測(cè),并在發(fā)現(xiàn)異常情況時(shí),發(fā)出聲光報(bào)警。闡述了該報(bào)警系統(tǒng)的硬件組成及軟件設(shè)計(jì)方法。關(guān)鍵詞單片機(jī)傳感器數(shù)模轉(zhuǎn)換報(bào)警Abstract Am ulti-fimctiona utomobilea larnungs ystemb asedo ns inglec hipc omputerco ntorlis in torducedin th isp aper.Th eo ilpr essuero flu bricatesystem, air pressure of braking system, temperature of cooling system, under pressure of tyre and guard against theft, detected automaticaly場(chǎng)thesystem. Audio and visual alarms wil be provided under abnormal conditions廠(chǎng)The hardware composition and software design of the system, described.Keywords Singlec hipc omputer Sensor Digital-t-oanaloguec onversion Alarmin 汽車(chē)多功能報(bào)苦器硬件系統(tǒng)設(shè)計(jì)根據(jù) 系 統(tǒng) 實(shí)際需要和產(chǎn)品性?xún)r(jià)比,選用ATMEL公司新生產(chǎn)的采用CMOs工藝的低功耗、高性能8位單片機(jī)AT89S52作為系統(tǒng)的控制器。AT89S52的片內(nèi)有8k Bytes LSP Flash閃爍存儲(chǔ)器,可進(jìn)行100(〕次寫(xiě)、擦除操作;256Bytes內(nèi)部數(shù)據(jù)存儲(chǔ)器(RAM);3 2 根可編程輸N輸出線(xiàn);2個(gè)可編程全雙工串行通道;看門(mén)狗(WTD)電路等。系統(tǒng)由傳感器、單片機(jī)、模數(shù)轉(zhuǎn)換器、無(wú)線(xiàn)信號(hào)發(fā)射電路、指示燈驅(qū)動(dòng)電路、聲光報(bào)警驅(qū)動(dòng)電KD一9563,發(fā)出三聲二閃光。并觸發(fā)一個(gè)高電平,驅(qū)動(dòng)無(wú)線(xiàn)信號(hào)發(fā)射電路。
標(biāo)簽: 單片機(jī) 汽車(chē) 多功能 報(bào)警
上傳時(shí)間: 2013-11-09
上傳用戶(hù):gxmm
一種基于ST62單片機(jī)的稱(chēng)重顯示控制器A Weighing Display Controller Based on ST62 Single Chip Computer祛 FA(上海時(shí)博飛奧控制系統(tǒng)有限公司,上海201100)摘要在介紹了基于ST62單片機(jī)的基礎(chǔ)上,詳細(xì)描述了稱(chēng)重顯控制器的硬件設(shè)計(jì)和軟件設(shè)計(jì)思路。該控制器結(jié)構(gòu)簡(jiǎn)單、操作方便、抗擾能力強(qiáng)等優(yōu)點(diǎn);具有較好的推廣應(yīng)用價(jià)值。關(guān)鍵詞稱(chēng)重顯示控制儀ST62單片機(jī)硬件設(shè)計(jì)軟件設(shè)計(jì)Abstract Ont heb asiso fin torductiono fST 62s inglec hipc omputer,th ed esignc oncrptof h ardwarea nds oftwarefo rw eighingd isplayc ontorleris d escrbed.The controler features simple structure, ease operation, powerful capability of anti-interference, etc.,it is wealth to be promoted into practicalapplicationsKeywords We妙噸display0 引言ST62s inglec hip Hardwared esign Softwaer design備 份 振 蕩器,振蕩器保護(hù)電路,上電復(fù)位及低壓檢測(cè)復(fù)稱(chēng) 重 顯 示控制器是一種具有數(shù)字顯示、開(kāi)關(guān)量輸出、定值控制和通信功能的以微機(jī)為操作核心的稱(chēng)重控制裝置。它是電子衡器的重要基礎(chǔ)部件,直接影響電子衡器及電子稱(chēng)重系統(tǒng)的功能和性能。與合適的傳感器及承重傳力復(fù)位系統(tǒng)組合可組成配料秤、料斗秤、定值秤、平臺(tái)秤、汽車(chē)秤等,廣泛應(yīng)用于電力、化工、建筑、冶金、交通運(yùn)輸、食品、軍工等部門(mén),是進(jìn)行自動(dòng)稱(chēng)重配料控制和生產(chǎn)過(guò)程自動(dòng)化必不可少的重要檢測(cè)、控制裝置。隨著 稱(chēng) 重 計(jì)量自動(dòng)化水平的提高,對(duì)稱(chēng)重顯示控制器的要求也越來(lái)越高。為實(shí)現(xiàn)低漂移、高穩(wěn)定,本控制器采用低漂移、高增益放大器AD620和高分辨率的A/D轉(zhuǎn)換器CS5550。為提高穩(wěn)定性和可靠性,采用集成度高的、抗干擾能力強(qiáng)的ST62單片機(jī)。
標(biāo)簽: ST 62 單片機(jī) 稱(chēng)重
上傳時(shí)間: 2013-10-29
上傳用戶(hù):釣鰲牧馬
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