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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT66F4530 데이터시트(PDF) 47 Page - Holtek Semiconductor Inc |
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HT66F4530 데이터시트(HTML) 47 Page - Holtek Semiconductor Inc |
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47 / 224 page  Rev. 1.00 4� De�e��e� �1� �01� Rev. 1.00 47 De�e��e� �1� �01� HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers EEPROM Data Memory ThesedevicescontainanareaofinternalEEPROMDataMemory.EEPROM,whichstandsfor ElectricallyErasableProgrammableReadOnlyMemory,isbyitsnatureanon-volatileform ofre-programmablememory,withdataretentionevenwhenitspowersupplyisremoved.By incorporatingthiskindofdatamemory,awholenewhostofapplicationpossibilitiesaremade availabletothedesigner.TheavailabilityofEEPROMstorageallowsinformationsuchasproduct identificationnumbers,calibrationvalues,specificuserdata,systemsetupdataorotherproduct informationtobestoreddirectlywithintheproductmicrocontroller.Theprocessofreadingand writingdatatotheEEPROMmemoryhasbeenreducedtoaverytrivialaffair. Device Capacity Address HT��F4530 3�×8 00H~1FH HT��F4540 �4×8 00H~3FH HT��F4550 �4×8 00H~3FH EEPROM Data Memory Structure TheEEPROMDataMemorycapacityis32×8to64×8bitsforthesedevices.UnliketheProgram MemoryandRAMDataMemory,theEEPROMDataMemoryisnotdirectlymappedintomemory spaceandisthereforenotdirectlyaddressableinthesamewayastheothertypesofmemory.Read andWriteoperationstotheEEPROMarecarriedoutinsinglebyteoperationsusinganaddressand adataregisterinSector0andasinglecontrolregisterinSector1. EEPROM Registers ThreeregisterscontroltheoveralloperationoftheinternalEEPROMDataMemory.Thesearethe addressregister,EEA,thedataregister,EEDandasinglecontrolregister,EEC.AsboththeEEA andEEDregistersarelocatedinSector0,theycanbedirectlyaccessedinthesamewayasanyother SpecialFunctionRegister.TheEECregisterhowever,beinglocatedinSector1,canbereadfromor writtentoindirectlyusingtheMP1L/MP1HorMP2L/MP2HMemoryPointerandIndirectAddressing Register,IAR1/IAR2.BecausetheEECcontrolregisterislocatedataddress40HinSector1,the MP1LorMP2LMemoryPointermustfirstbesettothevalue40HandtheMP1HorMP2HMemory Pointerhighbytesettothevalue,01H,beforeanyoperationsontheEECregisterareexecuted. Register Name Bit 7 6 5 4 3 2 1 0 EEA(HT��F4530) — — — EEA4 EEA3 EEA� EEA1 EEA0 EEA(HT��F4540/ HT��F4550) — — EEA5 EEA4 EEA3 EEA� EEA1 EEA0 EED D7 D� D5 D4 D3 D� D1 D0 EEC — — — — WREN WR RDEN RD EEPROM Registers List EEA Register – HT66F4530 Bit 7 6 5 4 3 2 1 0 Na�e — — — EEA4 EEA3 EEA� EEA1 EEA0 R/W — — — R/W R/W R/W R/W R/W POR — — — 0 0 0 0 0 Bit7~5 Unimplemented,readas"0" Bit4~0 EEA4~EEA0:DataEEPROMaddress DataEEPROMaddressbit4~bit0 |
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