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HT67F5630 Datasheet(PDF) 32 Page - Holtek Semiconductor Inc |
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HT67F5630 Datasheet(HTML) 32 Page - Holtek Semiconductor Inc |
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32 / 147 page  Rev. 1.20 32 De�e��e� 1�� 201� Rev. 1.20 33 De�e��e� 1�� 201� HT67F5630 TinyPowerTM 24-Bit Delta Sigma A/D Flash MCU with LCD & EEPROM HT67F5630 TinyPowerTM 24-Bit Delta Sigma A/D Flash MCU with LCD & EEPROM EEPROM Data Memory ThisdevicecontainsanareaofinternalEEPROMDataMemory.EEPROM,whichstandsfor ElectricallyErasableProgrammableReadOnlyMemory,isbyitsnatureanon-volatileform ofre-programmablememory,withdataretentionevenwhenitspowersupplyisremoved.By incorporatingthiskindofdatamemory,awholenewhostofapplicationpossibilitiesaremade availabletothedesigner.TheavailabilityofEEPROMstorageallowsinformationsuchasproduct identificationnumbers,calibrationvalues,specificuserdata,systemsetupdataorotherproduct informationtobestoreddirectlywithintheproductmicrocontroller.Theprocessofreadingand writingdatatotheEEPROMmemoryhasbeenreducedtoaverytrivialaffair. EEPROM Data Memory Structure TheEEPROMDataMemorycapacityis32×8bitsforthedevice.UnliketheProgramMemory andRAMDataMemory,theEEPROMDataMemoryisnotdirectlymappedintomemoryspace andisthereforenotdirectlyaddressableinthesamewayastheothertypesofmemory.Readand WriteoperationstotheEEPROMarecarriedoutinsinglebyteoperationsusinganaddressanddata registerinBank0andasinglecontrolregisterinBank1. Capacity Address 32×8 00H~1FH 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. Name Bit 7 6 5 4 3 2 1 0 EEA D7 D� D5 EEA� EEA3 EEA2 EEA1 EEA0 EED D7 D� D5 D� D3 D2 D1 D0 EEC — — — — WREN WR RDEN RD EEPROM Register List EEA Register Bit 7 6 5 4 3 2 1 0 Na�e D7 D� D5 EEA� EEA3 EEA2 EEA1 EEA0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit7~5 Undefined,usedasgeneraldatabits Bit4~0 EEA4~EEA0:DataEEPROMaddressbit4~bit0 |
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