已阅读5页,还剩1页未读, 继续免费阅读
版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
TM-CardInthissystemTM(TouchMemory)thecardtookfirstcardthiscardalsoiscalledtheinformationbuttonisAmericanDALLASCorporationspatentproduct,itusesthesingletrackagreementcommunication,throughinstantaneousbumpstouchescompletesthedataread-write,TtheMcardcontourissimilartoabuttonbattery,usesdiameter17mm,Thethick36mmbuttonshapestainlesssteeloutercoveringseal,maymounttothecard,Thekeybucklesandsointheobject.Thenotvulnerablepartortheeasyspoiledpart,tohavecarriesConvenient,theanti-hit,water-damagedguardsagainst,anti-corrosive,theanti-magneticdisturbance,guardsagainstfoldsandsoontoberemarkableThecharacteristic,issuitableforthebadenvironment.1WirecorrespondenceagreementcausesTtheMcarddepositandwithdrawaldatatobeextremelyconvenient,gentlyassoonasbumpswiththecontact,instantaneousthenRoundnumberaccordingtoinformationread-writeoperation,itsperfectsecurityaccessmode,trueGuaranteesthedatamessagetohavethequitehighsecurityreliability.TMcardtypenumerousMany,theperformanceisdiverse.UsesDS1990AinthissystemF3/F5modelsthecardtotakethekeycard,onthiscardeachchipallengraveshastheunique64binaryIDcodetotaltobepossibletoreach280000000000000tohavemaynotfalseMakesthenature,permanentengravesintheproductionprocessiswiththelasercraftonROM,andAddedtheprotector,anyattemptchangesthisnumberalltobeabletocauseCRCtoverifyTheregulationmakesamistake.Enormousenhancementsystemsecurity.TouchMemory-Cardbecauseitsshaperesemblesthebuttonthesize,takesonekindofinformationproduct,oftenIscallediButton(informationbuttonabbreviation,Italyisinformationbutton).ItisAmericanDallsthesCorporationspatentproduces(Sequencenumberwhich,oneachiButtonhaswhichthedifferentserialnumber,cannotbechanged64IDlaserinteriorcarves,hasonlyOnemaytheunderstandingitscodecapacityreach264.Itscoreisusesthesingletrackserialtransmissionagreementtotouchthetypememory1-wireTouchMemory,sealsinthebuttontypeinthestainlesssteelvessel.Thetypicalcharacteristicliesin(passive)byalinerealizesthedataReads,writesandthestatustherecognition,solongaswithpokesheadingentlyassoonastobump(touches),instantaneouscompletescompletelyoperates.iBttonthenproducthasbeenthroughrepeatedlyseveralmillionoperationsStillcouldguaranteepreciseisreliableread-write.ItsinstituteHassafely,isconvenient,durably,thecharacteristicButwidelyusesinfinancial,theelectroniccharge,theelectroniccardElectronsafetysystemaswellasresourcesuseauthorizationAndsooneachkindofneedinformationencryptionrecognitiondomain.IsbecauseiButtonhasthemagnetismcard,ICcardfunctionButalsohastheobvioussuperiority,itisfrequentlymanufacturedBecomesthepublictransportationvehiclebuspermitcard,thestaffchecksattendancethecard,eachkindofelectricitySub-chargecardandsoon,thegeneraldesignationistheTM-card.TheiButtonisacomputerchipenclosedina16mmthickstainlesssteelcan.Becauseofthisuniqueanddurablecontainer,up-to-dateinformationcantravelwithapersonorobjectanywheretheygo.ThesteeliButtoncanbemountedvirtuallyanywherebecauseitisruggedenoughtowithstandharshenvironments,indoorsoroutdoors.Itissmallandportableenoughtoattachtoakeyfob,ring,watch,orotherpersonalitems,andbeuseddailyforapplicationssuchasaccesscontroltobuildingsandcomputers,assetmanagement,andvariousdataloggingtasks.ThesiliconchipwithintheiButtonisprotectedbytheultimatedurablematerial:stainlesssteel.YoucandropaniButton,steponit,orscratchit.TheiButtoniswear-testedfor10-yeardurability.DS1990Aneedsthestrictagreementtoguaranteethedatatheintegritytransmission,theagreementiscomposedbyfourkindoftypessignals:Bythereplacementpulseandthereplypulseconstitutionreplacementsequence,writes0,writes1,readingaccordingto.Besidesansweringsignal,othersignalsbybuscontrolunitinitialization.AllandDS1990Acommunicationallbyinitializationsequencestart.Thebuscontrolunit(herefigureofmicroprocessor)transmits(TX)areplacementpulse(Trest,atleast480mus),thenreleasesthemainlineandentersthereceivecondition(RX),themainlinepullstheresistancethroughontosethigh.DS1,990Aexaminesthedataendtherisealongafter,enterstheshortwaitingstatus(Tpdh:15-60mus),thentransmitsareplypulse(Tpdl:60-240mus),completesthereplacementwork.DS1990Apreparestotransmitorthereceivedata.Likechart4showsforthereplacementandthereplysuccession.Oncethebuscontrolunitexaminesthereplypulse,thensendsoutROtheMorder,TMmajorcommandforexample:LamdaReadROM,thisorderpermissionbuscontrolunitreadsDS1990A8seriescodes,48forewordsnumberand8CtheRCyard.Afterorderscorrectlytoaccept,iButton(producesIDdataonthemainline;LamdaMatchROM,thisordermayuseinonthemainlinetoturnonindividuallyormanyTouchMemorycomponentsituation.The1-Wirebushasonlyasinglelinebydefinition;itisimportantthateachdeviceonthebusbeabletodriveitattheappropriatetime.Tofacilitatethis,eachdeviceattachedtothe1-Wirebusmusthaveopendrainortri-stateoutputs.The1-WireportoftheDS1996Amulti-dropbusconsistsofa1-Wirebuswithmultipleslavesattached.Atstandardspeedthe1-Wirebushasamaximumdatarateof16.3kbps.Thevalueofthepullupresistorprimarilydependsonthenetworksizeandloadconditions.Formostapplicationstheoptimalvalueofthepullupresistorisapproximately2.2k.Theidlestateforthe1-Wirebusishigh.Ifforanyreasonatransactionneedstobesuspended,thebusMUSTbeleftintheidlestateifthetransactionistoresume.Ifthisdoesnotoccurandthebusisleftlowformorethan120s,oneormoredevicesonthebusmaybereset.All1-Wiredevicedatasheetsdescribetwosetsofcommands.ThefirstsetreferredtoasROMFunctionCommandsareusedfordeviceidentificationandselection.ThesecondsetisoftencalledMemoryFunctionCommandsbutmaycontainothernon-memoryoperations.AROMFunctionCommandmustbecompletedeachtimeadeviceisselectedtogetitreadyforaMemoryFunctionCommand.The1-WireAPIscreatedbyDallasSemiconductorutilizethesecommandstodooperationswith1-Wiredevices.Sometimesitisnotalwaysobviouswhatcommandsarebeingcalled.ThisdocumentwillmapthecommandspresentedinthedatasheetstotheAPIfunctions.WherespecificAPIfunctionsarenotavailable,atechniquewillbepresentedtotranslatethecommandsusingthegenericcommunicationsAPIfunctions.Intheusualsituation,TMandthemicrocomputerselecttwomethodstocarryonthedataexchange.OnekindisutilizesstandardserialmouthCOM1,COM2;Moreoverusestheprinterparallelmouth.Thisarticlecarriesontheintroductiontakethestringmouthwayastheexample.Inthemicrocomputer,byRS%D232standardworkCOM,usesthenegativelogical12Vworkpowersource;ThiswithTtheMcardconnectionlevelsymbol,doesnotneedtocarryontheleveltransformation.ConnectionsoftwarewiththegreatassemblyortheClanguagecompilation,isrestrictedinthelengthonlytointroducetheprincipleofwo
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 肿瘤病人膳食调养
- 选修第一节课时脂肪烃
- 颅脑创伤的急救护理课件
- 投资项目可行性研究报告与投资决策其他手续的关系
- 麻疹知识相关培训
- 2024年辽宁年低压电工证题库电工证实操考什么内容(全国版)
- 第十章 极地地区
- 第八单元 第7课时 练习六2023-2024学年一年级数学上册 《新征程》同步教案(苏教版)
- 初心作文700字以上【5篇】
- 有关大学生的自我鉴定3篇
- 北师大版六下第一单元《圆柱与圆锥》 大单元作业设计
- 第七讲社会主义现代化建设的教育、科技、人才战略教学课件
- 刑诉课后思考题-祝进杰
- 2022-2023学年成都外国语九年级下英语半期(直升模拟)考试题(含答案)
- 水利项目技术标准执行检查制度及技术标准清单建设单位
- 《 渔夫和金鱼的故事》第二课时
- 体育馆物业安保及保洁服务整体实施方案
- (完整版)常用食物含水量表
- 三年级综合实践《听-声音真奇妙》课件
- 燃气用金属波纹管ppt课件
- 风平衡调试方案
评论
0/150
提交评论