HT1622

RAMMapping´16LCDControllerforI/OmC

Features

·········

Operatingvoltage:2.7V~5.2V

ExternalCrystal32.768kHzoscillator

1/5bias,1/16duty,framefrequencyisHzMax.´16patterns,16commons,segments

Built-ininternalresistortypebiasgenerator3-wireserialinterface

8kindsoftimebase/WDTselectionTimebaseorWDToverflowoutputBuilt-inLCDdisplayRAM

·······R/Waddressautoincrement

Twoselectablebuzzerfrequencies(2kHz/4kHz)

Powerdowncommandreducespowerconsumption

Softwareconfigurationfeature

DatamodeandCommandmodeinstructionsThreedataaccessingmodes

VLCDpintoadjustLCDoperatingvoltage

GeneralDescription

HT16270isaperipheraldevicespeciallyde-signedforI/OtypemCusedtoexpandthedis-playcapability.Themax.displaysegmentofthedeviceare1024patterns(´16).Italsosupportsserialinterface,buzzersound,watch-dogtimerortimebasetimerfunctions.TheHT16270isamemorymappingandmulti-functionLCDcontroller.Thesoftware

configurationfeatureoftheHT16270makeitsuitableformultipleLCDapplicationsinclud-ingLCDmodulesanddisplaysubsystems.Onlythreelinesarerequiredfortheinterfacebe-tweenthehostcontrollerandtheHT16270.TheHT162Xserieshavemanykindsofprod-uctsthatmatchvariousapplications.

SelectionTable

HT162XCOMSEG

Built-inOsc.CrystalOsc.

Ö

HT1620HT1621HT1622HT16220HT1623HT1625HT1626HT1627HT16270

432

432ÖÖ

832Ö

Ö832

848ÖÖ

8ÖÖ

18ÖÖ

16Ö

Ö16

1April21,2000

BlockDiagram

PinAssignment

2

HT16270April21,2000

HT16270PadAssignment

*TheICsubstrateshouldbeconnectedtoVDDinthePCBlayoutartwork.

Chipsize:245´237(mil)

2

3April21,2000

PadCoordinates

Unit:mil

PadNo.

XYPadNo.XY12-99.90493-116.5790.8050116.15-4-116.6884.1551116.15-99.795-116.7277.5052116.19-93.166-116.7270.9053116.19-81.187-116.72.2554116.15-74.548-115.93-116.7254.7541.4555116.19-62.5856116.19-55.93109-116.7221.8557116.19-43.9411-116.7211.3958116.19-37.4012-115.94-0.6059116.19-25.3713-115.9460116.19-18.7014-115.94--7.1861116.24-6.7215-115.90-19.2162116.2411.900.0916-115.97-25.8563116.1918.4917-115.93-37.85116.2430.5118-115.93-44.4565116.1937.1019-115.93-56.4566116.1949.0920-115.93-63.0567116.1555.7621-115.97-75.0581.7068116.1567.7522-115.9369116.1974.3823-115.93--93.6570116.1524-115.94-115.94-100.3071116.1986.362572116.1126-108.08-112.3773112.20104.8593.0327-96.03-112.0774100.04112.2428-.43-112.057593.42112.2429-77.43-112.057681.43112.2430-70.82-112.057774.80112.2431-58.83-112.057862.77112.2432-52.17-112.057956.23112.2433-40.22-112.058044.20112.2434-33.58-112.058137.57112.2435-21.58-112.058225.63112.2436-14.98-112.00-112.058318.95112.246.97112.24112.24373815.633.672.97-112.00-112.05843922.27-112.0585-0.38112.244034.28-112.0586-11.65112.244140.88-112.0587-18.23112.204252.88-112.0588-30.22112.244359.47-112.05-36.112.244471.47-112.0590-48.92112.244578.13-112.0091-55.51112.244690.07-112.0092-67.45112.2947-112.0593-74.12112.24112.2448108.7296.72116.19-112.0594-112.00111.829596--86.15112.25-104.7292.72114.22112.25112.254

HT16270April21,2000

HT16270PadDescription

PadNo.12345678,910~1314~2930~93

PadNameDATAVSSOSCIOSCOVDDVLCDIRQBZ,BZT1~T4

COM0~COM15SEG0~SEG63

I/O¾IO¾IOOIOO

Description

Negativepowersupply,groundCrystaloscillatorinputpinCrystaloscillatooutputpinPositivepowersupply

LCDoperatingvoltageinputpad.

Timebaseorwatchdogtimeroverflowflag,NMOSopendrainoutput

2kHzor4kHztonefrequencyoutputpair(Tristateoutputbuffer)NotconnectedLCDcommonoutputsLCDsegmentoutputs

Chipselectioninputwithpull-highresistor.WhentheCSislogichigh,thedataandcommandreadfromorwritetotheHT16270aredisabled.Theserialinterfacecircuitisalsoreset.ButiftheCSisatlogiclowlevelandisinputtotheCSpad,thedataandcommandtransmissionbetweenthehostcontrollerandtheHT16270areallenabled.

READclockinputwithpull-highresistor.DataintheRAMoftheHT16270areclockedoutontherisingedgeoftheRDsig-nal.Theclockedoutdatawillappearonthedataline.Thehostcontrollercanusethenextfallingedgetolatchtheclockedoutdata.

WRITEclockinputwithpull-highresistor.DataontheDATAlinearelatchedintotheHT16270ontherisingedgeoftheWRsignal.

I/OSerialdatainput/outputwithpull-highresistor

94CSI

95RDI

96WRI

AbsoluteMaximumRatings

SupplyVoltage.............................-0.3Vto5.5VInputVoltage.................VSS-0.3VtoVDD+0.3V

StorageTemperature.................-50°Cto125°COperatingTemperature..............-25°Cto75°C

Note:Thesearestressratingsonly.Stressesexceedingtherangespecifiedunder²AbsoluteMaxi-mumRatings²maycausesubstantialdamagetothedevice.Functionaloperationofthisdeviceatotherconditionsbeyondthoselistedinthespecificationisnotimpliedandprolongedexpo-suretoextremeconditionsmayaffectdevicereliability.

5April21,2000

HT16270D.C.Characteristics

SymbolVDDIDD1IDD2ISTBVILVIHIOL1IOH1IOL2IOH2IOL3IOH3IOL4IOH4RPH

Parameter

OperatingVoltageOperatingCurrentOperatingCurrentStandbyCurrentInputLowVoltageInputHighVoltageBZ,BZ,IRQBZ,BZDATADATA

LCDCommonSinkCurrentLCDCommonSourceCurrentLCDSegmentSinkCurrentLCDSegmentSourceCurrentPull-highResistor

TestConditionsVDD¾3V5V3V5V3V5V3V5V3V5V3V5V3V5V3V5V3V5V3V5V3V5V3V5V3V5V3V5V

Conditions

¾

Noload/LCDONCrystaloscillatorNoload/LCDOFFCrystaloscillatorNoload

PowerdownmodeDATA,WR,CS,RDDATA,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=4.5VVOL=0.3VVOL=0.5VVOH=2.7VVOH=4.5V

DATA,WR,CS,RDTa=25°C

Min.Typ.Max.Unit2.7¾¾¾¾¾¾002.44.00.91.7-0.9-1.70.91.7-0.9-1.780180-40-9050120-30-7010050

¾305051024¾¾¾¾1.83-1.8-31.83-1.8-3160360-80-180100240-60-140200100

5.275125254514280.61.035¾¾¾¾¾¾¾¾¾¾¾¾¾¾¾¾300150

VmAmAmAmAmAmAVVVVmAmAmAmAmAmAmAmAmAmAmAmAmAmAmAmAkWkW

6April21,2000

HT16270A.C.Characteristics

SymbolfSYSfLCDtCOMfCLK1fCLK2tCS

Parameter

SystemClock

LCDFrameFrequencyLCDCommonPeriodSerialDataClock(WRPin)SerialDataClock(RDPin)SerialInterfaceResetPulseWidth(Figure3)

TestConditionsVDD3V5V3V5V¾3V5V3V5V¾3V5V3V5V

ConditionsCrystaloscillatorCrystaloscillatorn:NumberofCOMDutycycle50%Dutycycle50%CSWritemodeReadmodeWritemodeReadmode

¾¾¾¾¾

Min.¾¾¾¾¾¾¾¾¾¾3.346.671.673.34¾¾¾¾¾

Typ.3232n/fLCD¾¾¾¾250¾¾¾¾120120120100100

Ta=25°CMax.Unit¾¾¾¾¾15030075150¾¾¾¾¾¾¾¾¾¾

kHzkHzHzHzseckHzkHzkHzkHznsmsmsnsnsnsnsns

tCLK

WR,RDInputPulseWidth

(Figure1)

tr,tftsuthtsu1th1

Rise/FallTimeSerialDataClockWidth(Figure1)

SetupTimeforDATAtoWR,RD3VClockWidth(Figure2)5VHoldTimeforDATAtoWR,RD3VClockWidth(Figure2)5V3VSetupTimeforCStoWR,RDClockWidth(Figure3)5V3VHoldTimeforCStoWR,RDClockWidth(Figure3)5V

7April21,2000

HT16270Figure1

Figure2

Figure3

FunctionalDescription

Displaymemory-RAMstructure

ThestaticdisplayRAMisorganizedinto256´4bitsandstoresthedisplaydata.ThecontentsoftheRAMaredirectlymappedtothecontentsoftheLCDdriver.DataintheRAMcanbeaccessedbytheREAD,WRITEandREAD-MODIFY-WRITEcommands.Thefol-lowingisamappingfromtheRAMtotheLCDpatterns.

Timebaseandwatchdogtimer-WDTThetimebasegeneratorandWDTsharethesamedivided(/256)counter.TIMERDIS/EN/CLR,WDTDIS/EN/CLRandIRQEN/DISareinde-pendentfromeachother.OncetheWDTtime-outoccurs,theIRQpinwillremainatlogiclowleveluntiltheCLRWDTortheIRQDIScommandisissued.

RAMmapping

8

April21,2000

HT16270TimerandWDTconfigurations

Ifanexternalclockisselectedasthesourceofsystemfrequency,theSYSDIScommandturnsoutinvalidandthepowerdownmodefailstobecarriedoutuntiltheexternalclocksourceisre-moved.

Buzzertoneoutput

AsimpletonegeneratorisimplementedintheHT16270.ThetonegeneratorcanoutputapairofdifferentialdrivingsignalsontheBZandBZwhichareusedtogenerateasingletone.Commandformat

TheHT16270canbeconfiguredbythesoftwaresetting.Therearetwomodecommandstocon-figuretheHT16270resourceandtotransfertheLCDdisplaydata.

NameTONEOFFTONE4KTONE2K

CommandCode0000-1000-X010X-XXXX-X0110-XXXX-X

Turn-offtoneoutput

Turn-ontoneoutput,tonefrequencyis4kHzTurn-ontoneoutput,tonefrequencyis2kHz

ThefollowingarethedatamodeIDandthecommandmodeID:

Operation

READWRITE

READ-MODIFY-WRITECOMMAND

ModeDataDataData

ID110101101

Command100

Ifsuccessivecommandshavebeenissued,thecommandmodeIDcanbeomitted.Whilethesystemisoperatinginthenon-successivecom-mandorthenon-successiveaddressdatamode,theCSpinshouldbesetto²1²andthepreviousoperationmodewillberesetalso.TheCSpinreturnsto²0²,anewoperationmodeIDshouldbeissuedfirst.

Function

9April21,2000

HT16270TimingDiagrams

READmode(commandcode:110)

READmode(successiveaddressreading)

10April21,2000

HT16270WRITEmode(commandcode:101)

WRITEmode(successiveaddresswriting)

11April21,2000

HT16270READ-MODIFY-WRITEmode(commandcode:101)

READ-MODIFY-WRITEmode(successiveaddressaccessing)

12April21,2000

HT16270Commandmode(commandcode:100)

Mode(dataandcommandmode)

13April21,2000

HT16270ApplicationCircuits

*Note:

TheconnectionofIRQandRDpincanbeselecteddependingontherequirementofthemC.ThevoltageappliedtoVLCDpinmustbelowerthanVDD.

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

14April21,2000

HT16270CommandSummary

NameREADWRITEREAD-MODIFY-WRITESYSDISSYSENLCDOFFLCDONWDTDISWDTEN

ID

CommandCode

D/CDDDCCCCCCCCCCCCCCCCCCCC

Function

ReaddatafromtheRAMWritedatatotheRAM

ReadandWritedatatotheRAMTurnoffbothsystemoscillatorandLCDbiasgeneratorTurnonsystemoscillatorTurnoffLCDdisplayTurnonLCDdisplayDisabletimebaseoutputEnabletimebaseoutput

EnableWDTtime-outflagoutputTurnofftoneoutputs

Clearthecontentsofthetimebasegenerator

ClearthecontentsoftheWDTstageTonefrequencyoutput:4kHzTonefrequencyoutput:2kHzDisableIRQoutputEnableIRQoutput

Timebaseclockoutput:1HzTheWDTtime-outflagafter:4sTimebaseclockoutput:2HzTheWDTtime-outflagafter:2sTimebaseclockoutput:4HzTheWDTtime-outflagafter:1sTimebaseclockoutput:8Hz

TheWDTtime-outflagafter:1/2sTimebaseclockoutput:16Hz

TheWDTtime-outflagafter:1/4s

YesYesYes

DisableWDTtime-outflagoutputYes

YesYesDef.

110A7A6A5A4A3A2A1A0D0D1D2D3101A7A6A5A4A3A2A1A0D0D1D2D3101A7A6A5A4A3A2A1A0D0D1D2D31000000-0000-X1000000-0001-X1000000-0010-X1000000-0011-X1000000-0101-X1000000-0111-X

TIMERDIS1000000-0100-XTIMEREN1000000-0110-XTONEOFF1000000-1000-XCLRTIMER1000000-1101-XCLRWDTTONE4KTONE2KIRQDISIRQENF1F2F4F8F16

1000000-1111-X100010X-XXXX-X1000110-XXXX-X100100X-0XXX-X100100X-1XXX-X100101X-0000-X100101X-0001-X100101X-0010-X100101X-0011-X100101X-0100-X

15April21,2000

HT16270NameF32FF128TESTNORMAL

ID

CommandCode

D/CCCCCC

Function

Timebaseclockoutput:32Hz

TheWDTtime-outflagafter:1/8sTimebaseclockoutput:Hz

TheWDTtime-outflagafter:1/16sTimebaseclockoutput:128Hz

Yes

TheWDTtime-outflagafter:1/32sTestmode,userdon¢tuse.Normalmode

YesDef.

100101X-0101-X100101X-0110-X100101X-0111-X1001110-0000-X1001110-0011-X

Note:X:Don¢tcare

A7~A0:RAMaddressD3~D0:RAMdataD/C:Data/CommandmodeDef.:Poweronresetdefault

Alltheboldforms,namely110,101,and100,aremodecommands.Ofthese,100indicatesthecommandmodeID.Ifsuccessivecommandshavebeenissued,thecommandmodeIDexceptforthefirstcommandwillbeomitted.Thesourceofthetonefrequencyandofthetimebase/WDTclockfre-quencycanbederivedfroma32.768kHzcrystaloscillatororanexternal32kHzclock.Calculationofthefrequencyisbasedonthesystemfrequencysourcesasstatedabove.ItisrecommendedthatthehostcontrollershouldinitializetheHT16270afterpoweronreset,forpoweronresetmayfail,whichinturnleadstomalfunctioningoftheHT16270.

16April21,2000

HT16270HoltekSemiconductorInc.(Headquarters)

No.3CreationRd.II,Science-basedIndustrialPark,Hsinchu,Taiwan,R.O.C.Tel:886-3-563-1999Fax:886-3-563-11

HoltekSemiconductorInc.(TaipeiOffice)

5F,No.576,Sec.7ChungHsiaoE.Rd.,Taipei,Taiwan,R.O.C.Tel:886-2-2782-9635Fax:886-2-2782-9636

Fax:886-2-2782-7128(Internationalsaleshotline)

HoltekSemiconductor(HongKong)Ltd.

RM.711,Tower2,CheungShaWanPlaza,833CheungShaWanRd.,Kowloon,HongKongTel:852-2-745-8288Fax:852-2-742-8657

CopyrightÓ2000byHOLTEKSEMICONDUCTORINC.

TheinformationappearinginthisDataSheetisbelievedtobeaccurateatthetimeofpublication.However,Holtekassumesnoresponsibilityarisingfromtheuseofthespecificationsdescribed.TheapplicationsmentionedhereinareusedsolelyforthepurposeofillustrationandHoltekmakesnowarrantyorrepresentationthatsuchapplicationswillbesuitablewithoutfurthermodification,norrecommendstheuseofitsproductsforapplicationthatmaypres-entarisktohumanlifeduetomalfunctionorotherwise.Holtekreservestherighttoalteritsproductswithoutpriornotification.Forthemostup-to-dateinformation,pleasevisitourwebsiteathttp://www.holtek.com.tw.

17April21,2000