HT6222资料

Multi-PurposeEncoders

Features

·······

Operatingvoltage:1.8V~3.5V

DOUTwith38kHzcarrierforIRmediumLowstandbycurrent

Minimumtransmissionword:oneword455kHzceramicresonatororcrystal16-bitaddresscodes8-bitdatacodes

····

PPMcodemethod

Threedouble-activekeysMaximumactivekeys-HT6221:32keys-HT6222:keys

LowpowerandhighnoiseimmunityCMOStechnology

Applications

····

Televisionandvideocassetterecordercon-trollers

Burglaralarmsystems

SmokeandfirealarmsystemsGaragedoorcontrollers

····Cardoorcontrollers

CaralarmsystemsSecuritysystems

Otherremotecontrolsystems

GeneralDescription

TheHT6221/HT6222areCMOSLSIencodersdesignedforuseinremotecontrolsystems.Theyarecapableofencoding16-bitaddresscodesand8-bitdatacodes.Eachaddress/datainputcanbesettooneofthetwologicstates,0and1.

TheHT6221/HT6222contain32keys(K1~K32)andkeys(K1~K),respectively.Whenoneofthekeysistriggered,thepro-grammedaddress/dataistransmittedtogetherwiththeheaderbitsviaanIR(38kHzcarrier)transmissionmedium.

BlockDiagram

1March2,2000

元器件交易网www.cecb2b.comHT6221/HT6222PinAssignment

PadAssignment

Chipsize:94´104(mil)2

*TheICsubstrateshouldbeconnectedtoVDDinthePCBlayoutartwork.

2March2,2000

元器件交易网www.cecb2b.comHT6221/HT6222PadCoordinates

PadNo.

1234567101112

X-41.99-41.99-41.99-41.99-41.99-41.99-41.99-41.99-20.95-14.32-4.2524.31

Y34.4322.0215.392.98-5.61-28.31-37.83-46.88-46.88-46.88-46.88-46.88

PadNo.131415161718192021222324

X34.1741.9541.9541.9541.9541.9539.9928.26-11.18-23.16-29.79-39.27

Unit:milY-46.88-30.26-13.98-4.1212.1622.0246.8446.8446.8446.8446.8446.84

PinDescription

HT6222PinNo.1~671011121314~212223~24

PinNameR3~R8DOUTVDDD7X2X1VSSLEDC8~C1AINR1~R2

I/OIO¾IOI¾OI/OII

InternalConnectionCMOSINPull-lowCMOSOUT

¾CMOSINOSCILLATOROSCILLATOR

¾CMOSOUTCMOSIN/OUT

Pull-lowCMOSINPull-highPull-lowCMOSINPull-low

Description

Rowcontrolforkeyboardmatrix,activehighSerialdataoutputpin,witha38kHzcarrierPositivepowersupply,1.8V~3.5Vfornormaloperation

Mostsignificantdatabit(D7)codesetting455kHzresonatoroscillatoroutput455kHzresonatoroscillatorinputNegativepowersupply

TransmissionenableindicatoroutputColumncontrolforkeyboardmatrixLowbyteaddresscodes(8bits)scaninputRowcontrolforkeyboardmatrix,activehigh

3March2,2000

元器件交易网www.cecb2b.comHT6221/HT6222Approximateinternalconnectioncircuits

AbsoluteMaximumRatings

SupplyVoltage.................................-0.3Vto6VInputVoltage.................VSS-0.3VtoVDD+0.3V

StorageTemperature.................-50°Cto125°COperatingTemperature..............-20°Cto75°C

Note:Thesearestressratingsonly.Stressesexceedingtherangespecifiedunder\"AbsoluteMaxi-mumRatings\"maycausesubstantialdamagetothedevice.Functionaloperationofthisdeviceatotherconditionsbeyondthoselistedinthespecificationisnotimpliedandprolongedexpo-suretoextremeconditionsmayaffectdevicereliability.

ElectricalCharacteristic

SymbolVDDISTBIDDIOH1IOL1IOH2IOL2IOH3

Parameter

OperatingVoltageStandbyCurrentOperatingCurrent

OutputSourceCurrentforDOUTOutputSinkCurrentforDOUTOutputSourceCurrentforLEDOutputSinkCurrentforLEDOutputSourceCurrentforC1~C8

TestConditionsVDD¾3V3V3V3V3V3V3V

Conditions

¾

OscillatorstopsfOSC=455kHzNoloadVO=2.7VVO=0.3VVO=2.7VVO=0.3VVO=2.7V

Ta=25°C

Min.Typ.Max.Unit1.8¾¾-2.050-101.2-0.6

30.1200-4.0100-602.0-2.0

3.51.0400¾¾¾¾¾

VmAmAmAmAmAmAmA

4March2,2000

元器件交易网www.cecb2b.comHT6221/HT6222SymbolIOL3VIH1VIL1VIH2VIL2VIH3VIL3RPH1RPL1RPL2RPL3fOSC

Parameter

OutputSinkCurrentforC1~C8InputHighVoltageforR1~R8InputLowVoltageforR1~R8InputHighVoltageforC1~C8InputLowVoltageforC1~C8InputHighVoltageforAINInputLowVoltageforAINInputPull-highResistanceforAINInputPull-lowResistanceforAINInputPull-lowResistanceforR1~R8InputPull-lowResistanceforC1~C8SystemFrequency

TestConditionsVDD3V3V3V3V3V3V3V3V3V3V3V¾

ConditionsVO=0.3V

¾¾¾¾¾¾

VIN=0VVIN=3VVIN=3VVIN=3V455kHzceramicresonator

Min.Typ.Max.Unit101.901.101.25010070120300¾

30¾¾¾¾¾¾200150200500455

¾3.00.83.00.63.00.002503201500¾

mAVVVVVVkWkWkWkWkHz

FunctionalDescription

Keyboardscan

TheHT6221/HT6222remaininthehaltmodeduringthestandbystate(atthistime,theoscil-latorstops,andthestandbycurrent<1mA).TheHT6221consistsof32activekeys,andtheHT6222hasactivekeys.ThekeyboardformsoftheHT6221/HT6222areshownbelow.

·TheHT6221keyboardform

·TheHT6222keyboardform

5March2,2000

元器件交易网www.cecb2b.comHT6221/HT6222Whenoneofthekeys(32orkeys)istriggeredforover36ms,theoscillatorisenabledandthechipisactivated.Ifthekeyispressedandheldfor108msorless,the108mstransmissioncodesareenabledandcomprisedofaheadercode(9ms),anoffcode(4.5ms),lowbyteaddresscodes(9ms~18ms),highbyteaddresscodes(9ms~18ms),8-bitdatacodes(9ms~18ms),andtheinversecodesofthe8-bitdatacodes(18ms~9ms).Afterthepressedkeyisheldfor108ms,ifthekeyisstillhelddown,thetrans-missioncodesturnouttobeacompositionofheader(9ms)andoffcodes(2.5ms)only.Transmissioncodes

ThetransmissioncodesoftheHT6221/6222consistofa9msheadercode,a4.5msoffcode,16-bitad-dresscodes(18ms~36ms),9ms~18ms8-bitdatacodes,andtheinversecodeofthe8-bitdatacodes.Thefollowingisanillustrationofthetransmissioncodes:

Toavoidmistakesmadebykeyboardscanningorsimultaneoustwo-keyinputs(exceptforthethreedouble-keyactivefunctions(K21+K22,K21+K23,andK21+K24),theHT6221/HT6222arefacilitatedwith36msstartingtime.TheHT6221/HT6222alsoprovidethreedou-ble-keyactivefunctions(K21+K22,K21+K23,andK21+K24)fortapedeckrecordingopera-tions.Thedouble-keyoperationrulesareshownintiming4andtiming6.

OutputformatfortheDOUT

TheoutputcodecarrieroftheDOUTpinisshowninTiming2:

38kHzcarrier

ThetransmissioncodesemploythePPM(PulsePositionModulation)methodtorepresenttheirtwologicstatesby\"0\"(1.12ms)and\"1\"(2.24ms)asshowninTiming3:

Logicstates

6

March2,2000

元器件交易网www.cecb2b.comHT6221/HT6222·Settingtheaddresscodes(A0~A15)

Thealgorithmruleoftheaddresscodes(A0~A15)canbeselectedbymaskoption.Inthiscase,the16-biton-chipMASKROM(ROM1andROM2)areavailable,andthevalueofROM1(8bits)andROM2(8bits)aredecidedbyoneMASKLAYER.ThecurrentvalueofROM1andROM2areboth\"00H\".TheA0~A7aresetbylogicalORbetweenthe

externalswitchS0~S7andtheROM1.TheA8~A15equalsomebitsinvertedtoA0~A7,theinversionaredecidedbyLogicalORbe-tweentheexternalswitchS8~S15andtheROM2.Forexample:

Thefollowingisanillustrationoftheserulesinselectingtheaddresscodes(A0~A15).

7March2,2000

元器件交易网www.cecb2b.comHT6221/HT6222·Valuesofthedatacodes(D0~D7)

Table3:Double-keydatacodetable

KEYK21+K22K21+K23K21+K24

DataCodesD0~D6101011001101101110110

DataCode

D7

0/10/10/1

TheHT6221/HT6222contain32andac-tivekeys,respectively.Eachkeycorrespondstoadatacode.Fortapedeckrecording,theHT6221/HT6222providethreedouble-keyfunctions.Thedouble-key,single-key,anddouble-keyoperationrulesareshowninTa-ble3,Table4,Timing4,Timing5andTiming6.

Note:D7isdefinedbyanexternalswitch

Table4:K1~Ksingle-keydatacodetable

KEYK1K2K3K4K5K6K7K8K9K10K11K12K13K14K15K16K17K18K19K20K21K22K23K24K25

DataCodesD0~D60000000100000001000001100000001000010100000110000111000000010001001000010100011010000011000101100001110001111000000010010001000100100110010000101001010100011010011101000001100

DataCode

D7

0/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/1

KEYK33K34K35K36K37K38K39K40K41K42K43K44K45K46K47K48K49K50K51K52K53K54K55K56K57

DataCodesD0~D60000001100000101000011100001001000110100010110001111000100010011001001010100111010010011001101100101110011111001000010110001010100101110010100101011010101011010111101010001101

DataCode

D7

0/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/10/1

8March2,2000

元器件交易网www.cecb2b.comHT6221/HT6222KEYK26K27K28K29K30K31K32

DataCodesD0~D61001100010110011011000011100101110001111001111100

DataCode

D7

0/10/10/10/10/10/10/1

KEYK58K59K60K61K62K63K

DataCodesD0~D61001101010110111011010011101101110101111011111101

DataCode

D7

0/10/10/10/10/10/10/1

Note:D7isdefinedbyanexternalswitch

D7=0:connecttoVDDD7=1:connecttoVSS

Invaliddouble-keyinput

9

March2,2000

元器件交易网www.cecb2b.comHT6221/HT6222Note:KncanbeoneofK1~K

Validsingle-keyinput

Note:KmcanbeoneofK22~K24

Validdouble-keyinput

DOUTandLED

Afterthetransmissioncodesaresent,theDOUTpingeneratestransmissioncodeswithacarrier,andtheLEDgoeslowtodriveatransmissionindicator.

10March2,2000

元器件交易网www.cecb2b.comHT6221/HT6222ApplicationCircuits

Applicationcircuit1

Note:Typicalinfrareddiode:EL-1L2(KODENSHICORP.)

11March2,2000

元器件交易网www.cecb2b.comHT6221/HT6222Applicationcircuit2

Note:Typicalinfrareddiode:EL-1L2(KODENSHICORP.)

12March2,2000

元器件交易网www.cecb2b.comHT6221/HT6222HoltekSemiconductorInc.(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.

13March2,2000