外文翻译DS1302涓流充电计时芯片.docx

外文翻译DS1302涓流充电计时芯片.docx

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外文翻译DS1302涓流充电计时芯片

中文2560字

DS1302tricklechargetimekeepingchip

Abstract:

IntroducestheUnitedStateswithDALLAStricklechargecurrentcapacityofsmalllow-powerrealtimeclockDS1302circuitstructure,workingprincipleanditsapplicationinreal-timedisplayofapplicationtime.Itcanbeyears,months,days,weekdays,hours,minutes,secondsfortime,andhasmultiplefunctions,suchasaleapyearcompensation.DS1302aregivenintheC51toreadandwriteproceduresandflowchart,aswellasintheprocessofdebuggingnote.

Keywords:

clockcircuit;real-timeclock;singlechip;Application

1Introduction

Nowpopularinmanyoftheserialclockcircuit,suchastheDS1302,DS1307,PCF8485,etc..Thesecircuitsinterfaceissimple,inexpensiveandeasytouse,hasbeenwidelyused.ThispaperintroducestheDS1302realtimeclockcircuitisDALLAS'sasmalltricklechargecurrentofthecircuitcapacity,themainfeatureistheuseofserialdatatransmission,canprovideprogrammablepower-downprotectionfunctionsofchargeandcanbeshutdownchargingfunctions.32.768kHzcrystalordinary.

2DS1302'sstructureandworkingprinciple

DALLAScompaniesDS1302istheUnitedStateslaunchedahigh-performance,lowpowerconsumption,withreal-timeclockcircuitoftheRAM,itcanbeyears,months,days,weekdays,hours,minutes,secondsfortime,withleapyearcompensation,theworkingvoltageto2.5V~5.5V.Theuseofthree-wireinterfaceforsynchronouscommunicationwiththeCPU,andtheuseofunexpectedwaystosendmorethanonebyteofdataclocksignal,orRAM.DS1302withina31×8forthetemporarystorageoftheRAMdataregister.DS1302istheDS1202toupgradeproducts,compatiblewiththeDS1202,buttheincreaseofthemainpowersupply/back-pindualpowersupply,whileprovidingthepowerbacktothesmalltricklechargecurrentcapacity.

FEATURES

●1Real-TimeClockCountsSeconds,Minutes,Hours,DateoftheMonth,Month,DayoftheWeek,andYearwithLeap-YearCompensationValidUpto2100

●231x8Battery-BackedGeneral-PurposeRAM

●3SerialI/OforMinimumPinCount

●32.0Vto5.5VFullOperation

●4UsesLessthan300nAat2.0V

●5Single-ByteorMultiple-Byte（BurstMode）DataTransferforReadorWriteofClockorRAMData

●68-PinDIPorOptional8-PinSOforSurfaceMount

●7Simple3-WireInterface

●8TTL-Compatible（VCC=5V）

●9OptionalIndustrialTemperatureRange:

-40°Cto+85°C

2.1Pinfunctionandstructure

PINDESCRIPTION

1）X1,X2–32.768kHzCrystalPins

2）GND–Ground

3）RST–Reset

4）I/O–DataInput/Output

5）SCLK–SerialClock

6）VCC1,VCC2–PowerSupplyPins

Figure1showingapinoftheDS1302,whichVcc1forback-uppowersupply,VCC2-basedpower.Inthemainpoweroff,theclockisalsoabletomaintaincontinuousoperation.Vcc2bytheDS1302orwhicheverVcc1thegreaterpower.WhenVcc2thanVcc1+0.2Vwhen,Vcc2powersupplytotheDS1302.WhenVcc1lessthanVcc2when,DS1302poweredbyVcc1.X1andX2isthesourceofoscillation,anexternal32.768kHzcrystal.RSTisthereset/chipselectlines,throughtheRSTinputhighdrivehometostartallofthedatatransfer.RSTinputhastwofunctions:

First,RSTaccesscontrollogic,allowingtheaddress/commandsequenceintotheshiftregister;Secondly,RSTtoterminatetheprovisionofsingle-byteormulti-bytedatatransmission.WhenRSTishigh,alldataareinitializedtoallowtheDS1302tooperateon.IfinthecourseofRSTsenthomeforthelow,itwillterminatethedatatransfer,I/Opinintohighimpedancestate.Run-timepower,Vcc≥2.5Vinbefore,RSTmustremainlow.SCLKlowonlywhentheRSTcanbesettohigh.I/Oforserialdatainputandoutputside（two-way）,followedbyadetaileddescription.IsalwaystheSCLKinput.

2.2DS1302controlbyte

DS1302controlwordasshowninFigure2.ControlbyteMSB（bit7）mustbelogic1,ifitis0,arenotabletowritedataintheDS1302,bit6if0,thenthecalendarclockanddataaccess,thataccesstoRAMto1data;bit5tobit1oftheaddressunitinstructions;leastsignificantbit（bit0）inthecaseof0towriteto,readto1,saidoperation,thecontrolbyteisalwaysthebeginningoftheoutputfromthelowestbit.

2.3Datainputandoutput（I/O）

InstructionwordinthecontrolinputofthenextclockrisingedgeofSCLK,thedataiswrittenintotheDS1302,datainputfromthelowenthronement0.Similarly,inthefollowing8-bitinstructionwordcontrolafterthenextfallingedgeofSCLKpulsetoreadouttheDS1302data,readthedatafrom0to7.

2.4DS1302register

DS1302thereare12registers,whichregisterwiththesevencalendar,clockrelateddatastoredindigitalformasaBCDcode,thecalendarandtimeregistersandcontrolwordsinTable1.

Inaddition,DS1302yearalsoregister,controlregister,thechargeregister,theclockregi