User`s guide

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
registerareexecuted.
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