HT66F60 datasheet(45/298 Pages) HOLTEK

45 / 298 page

Rev. 1.90

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Rev. 1.90

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HT66F20/HT66F30/HT66F40/HT66F50/HT66F60

HT66FU30/HT66FU40/HT66FU50/HT66FU60

Enhanced A/D Flash Type 8-Bit MCU with EEPROM

HT66F20/HT66F30/HT66F40/HT66F50/HT66F60

HT66FU30/HT66FU40/HT66FU50/HT66FU60

Enhanced A/D Flash Type 8-Bit MCU with EEPROM

EEPROM Data Memory

ThedevicecontainsanareaofinternalEEPROMDataMemory.EEPROM,whichstandsfor

ElectricallyErasableProgrammableReadOnlyMemory,isbyitsnatureanon-volatileform

ofre-programmablememory,withdataretentionevenwhenitspowersupplyisremoved.By

incorporatingthiskindofdatamemory,awholenewhostofapplicationpossibilitiesaremade

availabletothedesigner.TheavailabilityofEEPROMstorageallowsinformationsuchasproduct

identificationnumbers,calibrationvalues,specificuserdata,systemsetupdataorotherproduct

informationtobestoreddirectlywithintheproductmicrocontroller.Theprocessofreadingand

writingdatatotheEEPROMmemoryhasbeenreducedtoaverytrivialaffair.

EEPROM Data Memory Structure

TheEEPROMDataMemorycapacityvariesfrom32×8to256×8bits,accordingtothedevice

selected.UnliketheProgramMemoryandRAMDataMemory,theEEPROMDataMemoryisnot

directlymappedintomemoryspaceandisthereforenotdirectlyaddressableinthesamewayasthe

othertypesofmemory.ReadandWriteoperationstotheEEPROMarecarriedoutinsinglebyte

operationsusinganaddressanddataregisterinBank0andasinglecontrolregisterinBank1.

Device

Capacity

Address

HT66��0

��×8

00H~1�H

HT66��0

64×8

00H~��H

HT66�40

1�8×8

00H~7�H

HT66�50/HT66�60

�56×8

00H~��H

EEPROM Registers

ThreeregisterscontroltheoveralloperationoftheinternalEEPROMDataMemory.Thesearethe

addressregister,EEA,thedataregister,EEDandasinglecontrolregister,EEC.AsboththeEEA

andEEDregistersarelocatedinBank0,theycanbedirectlyaccessedinthesamewasasanyother

SpecialFunctionRegister.TheEECregisterhowever,beinglocatedinBank1,cannotbedirectly

addresseddirectlyandcanonlybereadfromorwrittentoindirectlyusingtheMP1MemoryPointer

andIndirectAddressingRegister,IAR1.BecausetheEECcontrolregisterislocatedataddress40H

inBank1,theMP1MemoryPointermustfirstbesettothevalue40HandtheBankPointerregister,

BP,settothevalue,01H,beforeanyoperationsontheEECregisterareexecuted.

HT66F60 Datasheet(PDF) 45 Page - Holtek Semiconductor Inc

HT66F60 Datasheet(HTML) 45 Page - Holtek Semiconductor Inc

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