HT1621

RAMMapping32´4LCDControllerforI/OMCU

PATENTED

PATNo.:TW099352

Features

·Operatingvoltage:2.4V~5.2V·Built-in256kHzRCoscillator

·External32.768kHzcrystalor256kHzfrequency

·32´4LCDdriver

·Built-in32´4bitdisplayRAM·3-wireserialinterface

·InternalLCDdrivingfrequencysource·Softwareconfigurationfeature

·Datamodeandcommandmodeinstructions·R/Waddressautoincrement·Threedataaccessingmodes

·VLCDpinforadjustingLCDoperatingvoltage·HT1621:44-pinQFP/LQFPpackage

sourceinput

·Selectionof1/2or1/3bias,andselectionof1/2or

1/3or1/4dutyLCDapplications

·Internaltimebasefrequencysources

·Twoselectablebuzzerfrequencies(2kHz/4kHz)·Powerdowncommandreducespowerconsumption·Built-intimebasegeneratorandWDT·TimebaseorWDToverflowoutput·8kindsoftimebase/WDTclocksources

HT1621B:48-pinSSOP/LQFPpackagesHT1621G:Goldbumpedchip

GeneralDescription

TheHT1621isa128pattern(32´4),memorymapping,andmulti-functionLCDdriver.TheS/WconfigurationfeatureoftheHT1621makesitsuitableformultipleLCDapplicationsincludingLCDmodulesanddisplaysub-systems.Onlythreeorfourlinesarerequiredforthein-terfacebetweenthehostcontrollerandtheHT1621.TheHT1621containsapowerdowncommandtore-ducepowerconsumption.

SelectionTable

HT162XCOMSEGBuilt-inOsc.CrystalOsc.HT1620432¾ÖHT1621432ÖÖHT1622832Ö¾HT16220832¾ÖHT1623848ÖÖHT16258ÖÖHT162618ÖÖRev.3.001April29,2011

PATENTED

BlockDiagram

HT1621/HT1621G

Note:

CS:ChipselectionBZ,BZ:Toneoutputs

WR,RD,DATA:Serialinterface

COM0~COM3,SEG0~SEG31:LCDoutputsIRQ:TimebaseorWDToverflowoutput

PinAssignment

Rev.3.002April29,2011

PATENTED

PadAssignment

HT1621/HT1621G

Chipsize:82´83(mil)2Bumpheight:18mm±3mmMin.Bumpspacing:23.02mmBumpsize:76´76mm2

*TheICsubstrateshouldbeconnectedtoVDDinthePCBlayoutartwork.

Rev.3.003April29,2011

PATENTED

PadCoordinates

PadNo.1234567101112131415161718192021222324X-802.951-927.055-927.055-927.055-925.358-925.358-925.785-925.785-925.699-6.840-637.515-452.726-288.935-1.915-84.35014.669114.260213.320312.380925.915925.915925.915925.915925.915Y939.295343.250244.230.374-52.510-151.360-566.516-675.287-773.697-939.537-935.685-935.685-935.685-935.685-935.685-935.685-940.130-940.130-940.130-867.615-768.555-669.495-570.435-437.375PadNo.2526272829303132333435363738394041424344454748XHT1621/HT1621G

Unit:mmY-338.315-239.255-140.195-41.13457.925156.986256.046355.106939.295939.295939.295939.295939.295939.295939.295939.295939.295939.295939.295939.295939.295939.295939.295939.295925.915925.915925.915925.915925.915925.915925.915925.915849.5750.530651.469552.409453.349354.2255.230156.16957.109-41.951-141.010-240.070-339.130-438.190-537.250-636.310PadDescription

PadNo.PadNameI/OFunctionChipselectioninputwithpull-highresistorWhentheCSislogichigh,thedataandcommandreadfromorwrittentotheHT1621aredisabled.Theserialinterfacecircuitisalsoreset.ButifCSisatlogiclowlevelandisinputtotheCSpad,thedataandcommandtrans-missionbetweenthehostcontrollerandtheHT1621areallenabled.READclockinputwithpull-highresistorDataintheRAMoftheHT1621areclockedoutonthefallingedgeoftheRDsignal.TheclockedoutdatawillappearontheDATAline.Thehostcontrol-lercanusethenextrisingedgetolatchtheclockedoutdata.WRITEclockinputwithpull-highresistorDataontheDATAlinearelatchedintotheHT1621ontherisingedgeoftheWRsignal.Serialdatainput/outputwithpull-highresistorNegativepowersupply,groundTheOSCIandOSCOpadsareconnectedtoa32.768kHzcrystalinordertogenerateasystemclock.Ifthesystemclockcomesfromanexternalclocksource,theexternalclocksourceshouldbeconnectedtotheOSCIpad.Butifanon-chipRCoscillatorisselectedinstead,theOSCIandOSCOpadscanbeleftopen.LCDpowerinputPositivepowersupplyTimebaseorWDToverflowflag,NMOSopendrainoutput2kHzor4kHztonefrequencyoutputpairLCDcommonoutputsLCDsegmentoutputs1CSI2RDI345761011,1213~18~17WRDATAVSSOSCIOSCOVLCDVDDIRQBZ,BZCOM0~COM3SEG0~SEG31II/O¾IOI¾OOOORev.3.004April29,2011

PATENTED

AbsoluteMaximumRatings

SupplyVoltage...........................VSS-0.3VtoVSS+5.5VInputVoltage..............................VSS-0.3VtoVDD+0.3V

HT1621/HT1621G

StorageTemperature............................-50oCto125oCOperatingTemperature...........................-40oCto85oC

Note:Thesearestressratingsonly.Stressesexceedingtherangespecifiedunder²AbsoluteMaximumRatings²may

causesubstantialdamagetothedevice.Functionaloperationofthisdeviceatotherconditionsbeyondthoselistedinthespecificationisnotimpliedandprolongedexposuretoextremeconditionsmayaffectdevicereliability.

D.C.Characteristics

SymbolVDDIDD1ParameterOperatingVoltageOperatingCurrentTestConditionsVDD¾3V5V3V5V3V5V3V5V3V5V3V5V3V5V3V5V3V5V3V5V3V5V3V5V3V5VConditions¾Noload/LCDONOn-chipRCoscillatorNoload/LCDONCrystaloscillatorNoload/LCDONExternalclocksourceNoload,PowerdownmodeMin.2.4¾¾¾¾¾¾¾¾002.44.00.51.3-0.4-0.980150-80-12060120-40-706030Typ.¾150300601201002000.10.3¾¾¾¾1.22.6-0.8-1.8150250-120-200120200-70-10012060Max.5.23006001202402004005100.61.03.05.0¾¾¾¾¾¾¾¾¾¾¾¾200100Ta=25°CUnitVmAmAmAmAmAmAmAmAVVVVmAmAmAmAmAmAmAmAmAmAmAmAkWkWIDD2OperatingCurrentIDD3OperatingCurrentISTBStandbyCurrentVILInputLowVoltageDATA,WR,CS,RDVIHInputHighVoltageDATA,WR,CS,RDVOL=0.3VVOL=0.5VVOH=2.7VVOH=4.5VVOL=0.3VVOL=0.5VVOH=2.7VVOH=4.5VVOL=0.3VVOL=0.5VVOH=2.7VVOH=4.5VDATA,WR,CS,RDIOL1DATA,BZ,BZ,IRQIOH1DATA,BZ,BZIOL2LCDCommonSinkCurrentIOH2LCDCommonSourceCurrentIOL3LCDSegmentSinkCurrentIOH3LCDSegmentSourceCurrentRPHPull-highResistorRev.3.005April29,2011

PATENTED

A.C.Characteristics

SymbolfSYS1fSYS2fSYS3ParameterSystemClockSystemClockSystemClockTestConditionsVDD3V¾¾¾fLCDLCDClock¾¾tCOMfCLK1LCDCommonPeriodSerialDataClock(WRpin)¾3V5V3V5V3V¾3VtCLKWR,RDInputPulseWidth(Figure1)5Vtr,tftsuthtsu1th1tOFFtSRtRSTDNote:

Rise/FallTimeSerialDataClockWidth(Figure1)SetupTimeforDATAtoWR,RDClockWidth(Figure2)HoldTimeforDATAtoWR,RDClockWidth(Figure2)SetupTimeforCStoWR,RDClockWidth(Figure3)HoldTimeforCStoWR,RDClockWidth(Figure3)VDDOFFTimes(Figure4)VDDRisingSlewRate(Figure4)DelayTimeafterReset(Figure4)¾¾¾¾¾¾¾¾ConditionsOn-chipRCoscillatorCrystaloscillatorExternalclocksourceOn-chipRCoscillatorCrystaloscillatorExternalclocksourcen:NumberofCOMDutycycle50%Min.192¾¾¾¾¾¾44¾¾1.53.02503.346.671.673.34¾60250500250200.051HT1621/HT1621G

Ta=25°C

Typ.25632768256fSYS1/1024fSYS2/128fSYS3/1024n/fLCD¾¾¾¾2.04.0300¾¾¾¾120120300600300¾¾¾Max.320¾¾¾¾¾¾150300751502.55.0¾125¾125¾160¾¾¾¾¾¾¾UnitkHzHzkHzHzHzHzskHzkHzkHzkHzkHzkHznsmsfCLK2SerialDataClock(RDpin)ToneFrequency(2kHz)ToneFrequency(4kHz)SerialInterfaceResetPulseWidth(Figure3)Dutycycle50%fTONEtCSOn-chipRCoscillatorCSWritemodeReadmodeWritemodeReadmode¾¾¾¾¾VDDdropdownto0V¾¾msnsnsnsnsnsmsV/msms1.IftheconditionsofPower-onResettimingarenotsatisfiedinpowerOn/Offsequence,theinternalPower-onReset(POR)circuitwillnotoperatenormally.

2.IftheVDDdropsbelowtheminimumvoltageofoperatingvoltagespec.duringoperating,theconditionsofPower-onResettimingmustbesatisfiedalso.Thatis,theVDDmustdropto0Vandkeepat0Vfor20ms(min.)beforerisingtothenormaloperatingvoltage.

Rev.3.006April29,2011

PATENTED

HT1621/HT1621G

Figure1

Figure2

Figure3

Figure4Power-onResetTiming

Rev.3.007April29,2011

PATENTED

FunctionalDescription

DisplayMemory-RAM

Thestaticdisplaymemory(RAM)isorganizedinto32´4bitsandstoresthedisplayeddata.ThecontentsoftheRAMaredirectlymappedtothecontentsoftheLCDdriver.DataintheRAMcanbeaccessedbytheREAD,WRITE,andREAD-MODIFY-WRITEcommands.ThefollowingisamappingfromtheRAMtotheLCDpattern:

HT1621/HT1621G

systempowerdowncommand.Butiftheexternalclocksourceischosenasthesystemclock,usingtheSYSDIScommandcanneitherturntheoscillatoroffnorcarryoutthepowerdownmode.Thecrystaloscillatoroptioncanbeappliedtoconnectanexternalfrequencysourceof32kHztotheOSCIpin.Inthiscase,thesys-temfailstoenterthepowerdownmode,similartothecaseintheexternal256kHzclocksourceoperation.Attheinitialsystempoweron,theHT1621isattheSYSDISstate.

TimeBaseandWatchdogTimer(WDT)

Thetimebasegeneratoriscomprisedbyan8-stagecount-upripplecounterandisdesignedtogenerateanaccuratetimebase.Thewatchdogtimer(WDT),ontheotherhand,iscomposedofan8-stagetimebasegener-atoralongwitha2-stagecount-upcounter,andisde-signedtobreakthehostcontrollerorothersubsystemsfromabnormalstatessuchasunknownorunwantedjump,executionerrors,etc.TheWDTtime-outwillresultinthesettingofaninternalWDTtime-outflag.Theout-putsofthetimebasegeneratorandoftheWDTtime-outflagcanbeconnectedtotheIRQoutputbyacommandoption.Therearetotallyeightfrequencysourcesavail-ableforthetimebasegeneratorandtheWDTclock.Thefrequencyiscalculatedbythefollowingequation.32kHz2n

wherethevalueofnrangesfrom0to7bycommandop-tions.The32kHzintheaboveequationindicatesthatthesourceofthesystemfrequencyisderivedfromacrystaloscillatorof32.768kHz,anon-chiposcillator(256kHz),oranexternalfrequencyof256kHz.

fWDT=

Ifanon-chiposcillator(256kHz)oranexternal256kHzfrequencyischosenasthesourceofthesystemfre-quency,thefrequencysourceisbydefaultprescaledto32kHzbya3-stageprescaler.EmployingboththetimebasegeneratorandtheWDTrelatedcommands,oneshouldbecarefulsincethetimebasegeneratorandWDTsharethesame8-stagecounter.Forexample,in-vokingtheWDTDIScommanddisablesthetimebasegeneratorwhereasexecutingtheWDTENcommandnotonlyenablesthetimebasegeneratorbutactivatestheWDTtime-outflagoutput(connecttheWDT

RAMMapping

SystemOscillator

TheHT1621systemclockisusedtogeneratethetimebase/WatchdogTimer(WDT)clockfrequency,LCDdrivingclock,andtonefrequency.Thesourceoftheclockmaybefromanon-chipRCoscillator(256kHz),acrystaloscillator(32.768kHz),oranexternal256kHzclockbytheS/Wsetting.Theconfigurationofthesys-temoscillatorisasshown.AftertheSYSDIScommandisexecuted,thesystemclockwillstopandtheLCDbiasgeneratorwillturnoff.Thatcommandis,however,avail-ableonlyfortheon-chipRCoscillatororforthecrystaloscillator.Oncethesystemclockstops,theLCDdisplaywillbecomeblank,andthetimebase/WDTloseitsfunc-tionaswell.

TheLCDOFFcommandisusedtoturntheLCDbiasgeneratoroff.AftertheLCDbiasgeneratorswitchesoffbyissuingtheLCDOFFcommand,usingtheSYSDIScommandreducespowerconsumption,servingasa

SystemOscillatorConfiguration

Rev.3.00

8

April29,2011

PATENTED

HT1621/HT1621G

TimerandWDTConfigurations

time-outflagtotheIRQpin).AftertheTIMERENcom-mandistransferred,theWDTisdisconnectedfromtheIRQpin,andtheoutputofthetimebasegeneratoriscon-nectedtotheIRQpin.TheWDTcanbeclearedbyexecut-ingtheCLRWDTcommand,andthecontentsofthetimebasegeneratorisclearedbyexecutingtheCLRWDTortheCLRTIMERcommand.TheCLRWDTortheCLRTIMERcommandshouldbeexecutedpriortotheWDTENortheTIMERENcommandrespectively.Beforeex-ecutingtheIRQENcommandtheCLRWDTorCLRTIMERcommandshouldbeexecutedfirst.TheCLRTIMERcommandhastobeexecutedbeforeswitchingfromtheWDTmodetothetimebasemode.OncetheWDTtime-outoccurs,theIRQpinwillstayatalogiclowleveluntiltheCLRWDTortheIRQDIScommandisis-sued.AftertheIRQoutputisdisabledtheIRQpinwillre-mainatthefloatingstate.TheIRQoutputcanbeenabledordisabledbyexecutingtheIRQENortheIRQDIScommand,respectively.TheIRQENmakestheoutputofthetimebasegeneratororoftheWDTtime-outflagappearontheIRQpin.TheconfigurationofthetimebasegeneratoralongwiththeWDTareasshown.Inthecaseofon-chipRCoscillatororcrystaloscillator,thepowerdownmodecanreducepowerconsumptionsincetheoscillatorcanbeturnedonoroffbythecorre-spondingsystemcommands.Atthepowerdownmodethetimebase/WDTlosesallitsfunctions.

Ontheotherhand,ifanexternalclockisselectedasthesourceofsystemfrequencytheSYSDIScommandturnsoutinvalidandthepowerdownmodefailstobecarriedout.Thatis,aftertheexternalclocksourceisse-lected,theHT1621willcontinueworkinguntilsystempowerfailsortheexternalclocksourceisremoved.Af-terthesystempoweron,theIRQwillbedisabled.

ToneOutput

AsimpletonegeneratorisimplementedintheHT1621.Thetonegeneratorcanoutputapairofdifferentialdriv-ingsignalsontheBZandBZ,whichareusedtogener-ateasingletone.ByexecutingtheTONE4KandTONE2Kcommandstherearetwotonefrequencyout-putsselectable.TheTONE4KandTONE2Kcommandssetthetonefrequencyto4kHzand2kHz,respectively.ThetoneoutputcanbeturnedonoroffbyinvokingtheTONEONortheTONEOFFcommand.Thetoneout-puts,namelyBZandBZ,areapairofdifferentialdrivingoutputsusedtodriveapiezobuzzer.Oncethesystemisdisabledorthetoneoutputisinhibited,theBZandtheBZoutputswillremainatlowlevel.LCDDriver

TheHT1621isa128(32´4)patternLCDdriver.Itcanbeconfiguredas1/2or1/3biasand2or3or4commonsofLCDdriverbytheS/Wconfiguration.ThisfeaturemakestheHT1621suitableformultiplyLCDapplica-tions.TheLCDdrivingclockisderivedfromthesystemclock.Thevalueofthedrivingclockisalways256Hzevenwhenitisata32.768kHzcrystaloscillatorfrequency,anon-chipRCoscillatorfrequency,oranexternalfre-quency.TheLCDcorrespondingcommandsaresum-marizedinthetable.

Theboldformof100,namely100,indicatesthecom-mandmodeID.Ifsuccessivecommandshavebeenis-sued,thecommandmodeIDexceptforthefirstcommand,willbeomitted.TheLCDOFFcommandturnstheLCDdisplayoffbydisablingtheLCDbiasgen-erator.TheLCDONcommand,ontheotherhand,turnstheLCDdisplayonbyenablingtheLCDbiasgenerator.TheBIASandCOMaretheLCDpanelrelatedcom-FunctionTurnoffLCDoutputsTurnonLCDoutputsc=0:1/2biasoptionc=1:1/3biasoptionab=00:2commonsoptionab=01:3commonsoptionab=10:4commonsoptionNameLCDOFFLCDONCommandCode10000000010X10000000011XBIAS&COM1000010abXcXRev.3.009April29,2011

PATENTED

mands.UsingtheLCDrelatedcommands,theHT1621canbecompatiblewithmosttypesofLCDpanels.CommandFormat

TheHT1621canbeconfiguredbytheS/Wsetting.TherearetwomodecommandstoconfiguretheHT1621re-sourcesandtotransfertheLCDdisplaydata.Theconfigu-rationmodeoftheHT1621iscalledcommandmode,anditscommandmodeIDis100.Thecommandmodecon-sistsofasystemconfigurationcommand,asystemfrequencyselectioncommand,aLCDconfigurationcom-mand,atonefrequencyselectioncommand,atimer/WDTsettingcommand,andanoperatingcommand.Thedatamode,ontheotherhand,includesREAD,WRITE,andREAD-MODIFY-WRITEoperations.ThefollowingarethedatamodeIDsandthecommandmodeID:

OperationReadWriteRead-Modify-WriteCommandModeDataDataDataCommandID110101101100HT1621/HT1621G

levelpulseisrequiredtoinitializetheserialinterfaceoftheHT1621.TheDATAlineistheserialdatainput/outputline.DatatobereadorwrittenorcommandstobewrittenhavetobepassedthroughtheDATAline.TheRDlineistheREADclockinput.DataintheRAMareclockedoutonthefallingedgeoftheRDsignal,andtheclockedoutdatawillthenappearontheDATAline.Itisrecommendedthatthehostcontrollerreadincorrectdataduringtheintervalbe-tweentherisingedgeandthenextfallingedgeoftheRDsignal.TheWRlineistheWRITEclockinput.Thedata,address,andcommandontheDATAlineareallclockedintotheHT1621ontherisingedgeoftheWRsignal.ThereisanoptionalIRQlinetobeusedasaninterfacebetweenthehostcontrollerandtheHT1621.TheIRQpincanbeselectedasatimeroutputoraWDToverflowflagoutputbytheS/Wsetting.ThehostcontrollercanperformthetimebaseortheWDTfunctionbybeingconnectedwiththeIRQpinoftheHT1621.CrystalSelection

A32768HzcrystalcanbedirectlyconnectedtotheHT1621viaOSCIandOSCO.Inordertoobtainthecor-rectfrequency,twoadditionalloadcapacities(C1,C2)areneeded.Thevalueofthecapacitydependsonhowaccuratethecrystalis.Wesuggestthatyoucanfollowthetable,whichsuggeststhevalueofcapacities.Thetableillustratesthesuggestionvalueofcapacities(C1,C2).

Themodecommandshouldbeissuedbeforethedataorcommandistransferred.Ifsuccessivecommandshavebeenissued,thecommandmodeID,namely100,canbeomitted.Whilethesystemisoperatinginthenon-successivecommandorthenon-successivead-dressdatamode,theCSpinshouldbesetto²1²andthepreviousoperationmodewillberesetalso.OncetheCSpinreturnsto²0²anewoperationmodeIDshouldbeis-suedfirst.Interfacing

OnlyfourlinesarerequiredtointerfacewiththeHT1621.TheCSlineisusedtoinitializetheserialinter-facecircuitandtoterminatethecommunicationbetweenthehostcontrollerandtheHT1621.IftheCSpinissetto1,thedataandcommandissuedbetweenthehostcontrollerandtheHT1621arefirstdisabledandtheninitialized.Be-foreissuingamodecommandormodeswitching,ahigh

CrystalError±10ppm10~20ppmCapacityValue0~10p10~20pTimingDiagrams

READMode(CommandCode:110)

10

April29,2011

Rev.3.00

PATENTED

READMode(SuccessiveAddressReading)

HT1621/HT1621G

WRITEMode(CommandCode:101)

WRITEMode(SuccessiveAddressWriting)

Read-Modify-WriteMode(CommandCode:101)

Rev.3.0011April29,2011

PATENTED

Read-Modify-WriteMode(SuccessiveAddressAccessing)

HT1621/HT1621G

CommandMode(CommandCode:100)Mode(DataandCommandMode)Note:

ItisrecommendedthatthehostcontrollershouldreadinthedatafromtheDATAlinebetweentherisingedgeoftheRDlineandthefallingedgeofthenextRDline.

Rev.3.0012April29,2011

PATENTED

ApplicationCircuits

HostControllerwithanHT1621DisplaySystem

HT1621/HT1621G

Note:TheconnectionofIRQandRDpincanbeselecteddependingontherequirementoftheMCU.ThevoltageappliedtoVLCDpinmustbeequaltoorlowerthanVDD.AdjustVRtofitLCDdisplay,atVDD=5V,VLCD=4V,VR=15kW±20%.AdjustR(externalpull-highresistance)tofituser¢stimebaseclock.

Inordertoobtainthecorrectfrequency,twoadditionalloadcapacities(C1,C2)areneeded.Thevalueofthecapacitydependsonhowaccuratethecrystalis.Wesuggestthatyoucanfollowthetable,whichsuggeststhevalueofcapacities.

Thetableillustratesthesuggestionvalueofcapacities(C1,C2)

CrystalError±10ppm10~20ppmCapacityValue0~10p10~20pCommandSummary

NameREADWRITEREAD-MODIFY-WRITESYSDISSYSENLCDOFFLCDONTIMERDISWDTDISTIMERENWDTENRev.3.00

ID110101101100100100100100100100100CommandCodeA5A4A3A2A1A0D0D1D2D3A5A4A3A2A1A0D0D1D2D3A5A4A3A2A1A0D0D1D2D30000-0000-X0000-0001-X0000-0010-X0000-0011-X0000-0100-X0000-0101-X0000-0110-X0000-0111-X13

D/CDDDCCCCCCCCFunctionReaddatafromtheRAMWritedatatotheRAMREADandWRITEtotheRAMTurnoffbothsystemoscillatorandLCDYesbiasgeneratorTurnonsystemoscillatorTurnoffLCDbiasgeneratorTurnonLCDbiasgeneratorDisabletimebaseoutputDisableWDTtime-outflagoutputEnabletimebaseoutputEnableWDTtime-outflagoutputApril29,2011

YesDef.PATENTED

NameTONEOFFTONEONCLRTIMERCLRWDTXTAL32KRC256KEXT256KID100100100100100100100CommandCode0000-1000-X0000-1001-X0000-11XX-X0000-111X-X0001-01XX-X0001-10XX-X0001-11XX-XD/CCCCCCCCTurnofftoneoutputsTurnontoneoutputsHT1621/HT1621G

FunctionDef.YesClearthecontentsoftimebasegeneratorClearthecontentsofWDTstageSystemclocksource,crystaloscillatorSystemclocksource,on-chipRCoscillatorSystemclocksource,externalclocksourceLCD1/2biasoptionab=00:2commonsoptionab=01:3commonsoptionab=10:4commonsoptionLCD1/3biasoptionab=00:2commonsoptionab=01:3commonsoptionab=10:4commonsoptionTonefrequency,4kHzTonefrequency,2kHzDisableIRQoutputEnableIRQoutputTimebase/WDTclockoutput:1HzTheWDTtime-outflagafter:4sTimebase/WDTclockoutput:2HzTheWDTtime-outflagafter:2sTimebase/WDTclockoutput:4HzTheWDTtime-outflagafter:1sTimebase/WDTclockoutput:8HzTheWDTtime-outflagafter:1/2sTimebase/WDTclockoutput:16HzTheWDTtime-outflagafter:1/4sTimebase/WDTclockoutput:32HzTheWDTtime-outflagafter:1/8sTimebase/WDTclockoutput:HzTheWDTtime-outflagafter:1/16sTimebase/WDTclockoutput:128HzTheWDTtime-outflagafter:1/32sTestmode,userdon¢tuse.NormalmodeYesYesYesYesBIAS1/21000010-abX0-XCBIAS1/31000010-abX1-XCTONE4KTONE2KIRQDISIRQENF1F2F4F8F16F32FF128TESTNORMALNote:

100100100100100100100100100100100100100100010X-XXXX-X011X-XXXX-X100X-0XXX-X100X-1XXX-X101X-X000-X101X-X001-X101X-X010-X101X-X011-X101X-X100-X101X-X101-X101X-X110-X101X-X111-X1110-0000-X1110-0011-XCCCCCCCCCCCCCCX:Don,tcare

A5~A0:RAMaddressesD3~D0:RAMdataD/C:Data/commandmodeDef.:Poweronresetdefault

Alltheboldforms,namely110,101,and100,aremodecommands.Ofthese,100indicatesthecommandmodeID.Ifsuccessivecommandshavebeenissued,thecommandmodeIDexceptforthefirstcommandwillbeomitted.Thesourceofthetonefrequencyandofthetimebase/WDTclockfrequencycanbederivedfromanon-chip256kHzRCoscillator,a32.768kHzcrystaloscillator,oranexternal256kHzclock.Calculationofthefrequencyisbasedonthesystemfrequencysourcesasstatedabove.Itisrecommendedthatthehostcontrol-lershouldinitializetheHT1621afterpoweronreset,forpoweronresetmayfail,whichinturnleadstothemal-functioningoftheHT1621.

Rev.3.0014April29,2011

PATENTED

PackageInformation

44-pinQFP(10mm´10mm)OutlineDimension

HT1621/HT1621G

SymbolABCDEFGHIJKLaSymbolABCDEFGHIJKLaRev.3.00

DimensionsininchMin.0.5120.3900.5120.390¾¾0.075¾0.0100.0290.004¾0°Nom.¾¾¾¾0.0310.012¾¾¾¾¾0.004¾DimensionsinmmMin.13.009.9013.009.90¾¾1.90¾0.250.730.10¾0°15

Nom.¾¾¾¾0.800.30¾¾¾¾¾0.10¾Max.13.4010.1013.4010.10¾¾2.202.700.500.930.20¾7°April29,2011Max.0.5280.3980.5280.398¾¾0.0870.1060.0200.0370.008¾7°PATENTED

44-pinLQFP(10mm´10mm)(FP3.2mm)OutlineDimensions

HT1621/HT1621G

SymbolABCDEFGHIJKaSymbolABCDEFGHIJKaDimensionsininchMin.0.5120.3900.5120.390¾¾0.053¾0.0040.0410.0040°Nom.0.5200.3940.5200.3940.0310.0120.055¾¾0.047¾¾DimensionsinmmMin.13.009.9013.009.90¾¾1.35¾0.101.050.100°Nom.13.2010.0013.2010.000.800.301.40¾¾1.20¾¾Max.13.4010.1013.4010.10¾¾1.451.600.251.350.257°Max.0.5280.3980.5280.398¾¾0.0570.0630.0100.0530.0087°Rev.3.0016April29,2011

PATENTED

48-pinSSOP(300mil)OutlineDimensions

HT1621/HT1621G

SymbolABCC¢DEFGHaSymbolABCC¢DEFGHaDimensionsininchMin.0.3950.2910.0080.6130.085¾0.0040.0250.0040°Nom.¾¾¾¾¾0.025¾¾¾¾DimensionsinmmMin.10.037.390.2015.572.16¾0.100.0.100°Nom.¾¾¾¾¾0.¾¾¾¾Max.10.677.590.3016.182.51¾0.250.0.308°Max.0.4200.2990.0120.6370.099¾0.0100.0350.0128°Rev.3.0017April29,2011

PATENTED

48-pinLQFP(7mm´7mm)OutlineDimensions

HT1621/HT1621G

SymbolABCDEFGHIJKaSymbolABCDEFGHIJKaDimensionsininchMin.0.3500.2720.3500.272¾¾0.053¾¾0.0180.0040°Nom.¾¾¾¾0.0200.008¾¾0.004¾¾¾DimensionsinmmMin.8.906.908.906.90¾¾1.35¾¾0.450.100°Nom.¾¾¾¾0.500.20¾¾0.10¾¾¾Max.9.107.109.107.10¾¾1.451.60¾0.750.207°Max.0.3580.2800.3580.280¾¾0.0570.063¾0.0300.0087°Rev.3.0018April29,2011

PATENTED

ProductTapeandReelSpecifications

ReelDimensions

HT1621/HT1621G

SSOP48W

SymbolABCDT1T2DescriptionReelOuterDiameterReelInnerDiameterSpindleHoleDiameterKeySlitWidthSpaceBetweenFlangeReelThicknessDimensionsinmm330.0±1.0100.0±0.113.0+0.5/-0.22.0±0.532.8+0.3/-0.238.2±0.2Rev.3.0019April29,2011

PATENTED

CarrierTapeDimensions

HT1621/HT1621G

SSOP48W

SymbolWPEFDD1P0P1A0B0K1K2tCDescriptionCarrierTapeWidthCavityPitchPerforationPositionCavitytoPerforation(WidthDirection)PerforationDiameterCavityHoleDiameterPerforationPitchCavitytoPerforation(LengthDirection)CavityLengthCavityWidthCavityDepthCavityDepthCarrierTapeThicknessCoverTapeWidthDimensionsinmm32.0±0.316.0±0.11.75±0.114.2±0.11.51.50+0.1/-0.0+0.25/-0.004.0±0.12.0±0.112.0±0.116.20±0.12.4±0.13.2±0.10.35±0.0525.5±0.1Rev.3.0020April29,2011

PATENTED

HT1621/HT1621G

HoltekSemiconductorInc.(Headquarters)

No.3,CreationRd.II,SciencePark,Hsinchu,TaiwanTel:886-3-563-1999Fax:886-3-563-11http://www.holtek.com.tw

HoltekSemiconductorInc.(TaipeiSalesOffice)

4F-2,No.3-2,YuanQuSt.,NankangSoftwarePark,Taipei115,TaiwanTel:886-2-2655-7070Fax:886-2-2655-7373

Fax:886-2-2655-7383(Internationalsaleshotline)

HoltekSemiconductorInc.(ShenzhenSalesOffice)

5F,UnitA,ProductivityBuilding,No.5GaoxinM2ndRoad,NanshanDistrict,Shenzhen,China518057Tel:86-755-8616-9908,86-755-8616-9308Fax:86-755-8616-9722

HoltekSemiconductor(USA),Inc.(NorthAmericaSalesOffice)46729FremontBlvd.,Fremont,CA94538,USATel:1-510-252-9880Fax:1-510-252-9885http://www.holtek.com

CopyrightÓ2011byHOLTEKSEMICONDUCTORINC.

TheinformationappearinginthisDataSheetisbelievedtobeaccurateatthetimeofpublication.However,Holtekas-sumesnoresponsibilityarisingfromtheuseofthespecificationsdescribed.TheapplicationsmentionedhereinareusedsolelyforthepurposeofillustrationandHoltekmakesnowarrantyorrepresentationthatsuchapplicationswillbesuitablewithoutfurthermodification,norrecommendstheuseofitsproductsforapplicationthatmaypresentarisktohumanlifeduetomalfunctionorotherwise.Holtek¢sproductsarenotauthorizedforuseascriticalcomponentsinlifesupportdevicesorsystems.Holtekreservestherighttoalteritsproductswithoutpriornotification.Forthemostup-to-dateinformation,pleasevisitourwebsiteathttp://www.holtek.com.tw.

Rev.3.0021April29,2011