ETIC 2230 Guia do Utilizador descarregar pdf (Página 27)

Rev. 1.10 26 November 14, 2014 Rev. 1.10 27 November 14, 2014

HT66FW2230

Wireless Charger A/D Flash 8-Bit MCU

EEPROM Data Memory

OneofthespecialfeaturesinthedeviceisitsinternalEEPROMDataMemory.EEPROM,which

standsforElectricallyErasableProgrammableReadOnlyMemory,isbyitsnatureanon-volatile

formofmemory,withdataretentionevenwhenitspowersupplyisremoved.Byincorporating

thiskindofdatamemory,awholenewhostofapplicationpossibilitiesaremadeavailabletothe

designer.TheavailabilityofEEPROMstorageallowsinformationsuchasproductidentification

numbers,calibrationvalues,specicuserdata,systemsetupdataorotherproductinformationto

bestoreddirectlywithintheproductmicrocontroller.Theprocessofreadingandwritingdatatothe

EEPROMmemoryhasbeenreducedtoaverytrivialaffair.

EEPROM Data Memory Structure

TheEEPROMDataMemorycapacityisupto64×8bits.UnliketheProgramMemoryandRAM

DataMemory,theEEPROMDataMemoryisnotdirectlymappedandisthereforenotdirectly

accessibleinthesamewayastheothertypesofmemory.ReadandWriteoperationstothe

EEPROMarecarriedoutinsinglebyteoperationsusinganaddressanddataregisterinBank0and

asinglecontrolregisterinBank1.

EEPROM Registers

ThreeregisterscontroltheoveralloperationoftheinternalEEPROMDataMemory.Thesearethe

addressregister,EEA,thedataregister,EEDandasinglecontrolregister,EEC.AsboththeEEA

andEEDregistersarelocatedinBank0,theycanbedirectlyaccessedinthesamewayasanyother

SpecialFunctionRegister.TheEECregisterhowever,beinglocatedinBank1,cannotbedirectly

addresseddirectlyandcanonlybereadfromorwrittentoindirectlyusingtheMP1LandMP1H

MemoryPointersandIndirectAddressingRegister,IAR1.BecausetheEECcontrolregisteris

locatedataddress40HinBank1,theMP1L/MP2LMemoryPointermustrstbesettothevalue

40HandtheMemoryPoint,MP1H/MP2H,settothevalue,01H,beforeanyoperationsontheEEC

EEPROM Control Registers List

Name

Bit

7 6 5 4 3 2 1 0

EEA — — D5

D4 D3 D2 D1 D0

EED D7 D6 D5

D4 D3 D2 D1 D0

EEC — — — —

WREN WR RDEN RD

EEA Register

Bit 7 6 5 4 3 2 1 0

Name — — D5 D4 D3 D2 D1 D0

R/W — — R/W R/W R/W R/W R/W R/W

POR — — 0 0 0 0 0 0

Bit7~6 Unimplemented,readas"0"

Bit5~0 DataEEPROMaddress

DataEEPROMaddressbit5~bit0

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 147 148

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