HT45F75 datasheet(24/190 Pages) HOLTEK

24 / 190 page

Rev. 1.10

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Rev. 1.10

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HT45F75

Body Fat Scale Flash MCU

HT45F75

Body Fat Scale Flash MCU

However,thetwoOCDSpinswhicharepin-sharedwiththeICPprogrammingpinsarestillused

astheFlashMemoryprogrammingpinsforICP.FormoredetailedOCDSinformation,refertothe

correspondingdocumentnamed“Holteke-Linkfor8-bitMCUOCDSUser’sGuide”.

Holtek e-Link Pins

EV Chip Pins

Pin Description

OCDSDA

On-Chip De�ug Suppo�t Data/Add�ess input/output

OCDSCK

On-Chip De�ug Suppo�t Clo�k input

VDD

Powe� Supply

VSS

G�ound

In Application Programming – IAP

ThedeviceoffersIAPfunctiontoupdatedataorapplicationprogramtoFlashROM.Userscan

defineanyROMlocationforIAP,buttherearesomefeatureswhichusermustnoticeinusingIAP

function.

• EraseBlock:256words/block

• Writing:4words/time

• Reading:1word/time

In Application Programming Control Register

TheAddressregisters,FARLandFARH,andtheDataregisters,FD0L/FD0H,FD1L/FD1H,FD2L/

FD2H,FD3L/FD3H,locatedinallDataMemorysectors,togetherwiththeControlregisters,FC0

andFC1,locatedinDataMemorysector1arethecorrespondingFlashaccessregistersforIAP.As

indirectaddressingistheonlywaytoaccesstheFC0andFC1registers,allreadandwriteoperations

totheregistersmustbeperformedusingtheIndirectAddressingRegister,IAR1orIAR2,andthe

MemoryPointerpair,MP1L/MP1HorMP2L/MP2H.BecausetheFC0andFC1controlregistersare

locatedattheaddressof28H~29HinDataMemorysector1,thedesiredvaluerangedfrom28Hto

29HmustbewrittenintotheMP1LorMP2LMemoryPointerlowbyteandthevalue“01H”must

alsobewrittenintotheMP1HorMP2HMemoryPointerhighbyte.

• FC0 Register

Bit

Na�e

CFWEN

FMOD�

FMOD1

FMOD0

FWPEN

FWT

FRDEN

FRD

R/W

POR

Bit7

CFWEN:FlashMemoryWriteenablecontrol

0:Flashmemorywritefunctionisdisabled

1:Flashmemorywritefunctionhasbeensuccessfullyenabled

Whenthisbitisclearedto0byapplicationprogram,theFlashmemorywritefunction

isdisabled.Notethatwritinga“1”intothisbitresultsinnoaction.Thisbitisused

toindicatethattheFlashmemorywritefunctionstatus.Whenthisbitissetto1by

hardware,itmeansthattheFlashmemorywritefunctionisenabledsuccessfully.

Otherwise,theFlashmemorywritefunctionisdisabledasthebitcontentiszero.

Bit6~4

FMOD2~FMOD0:Modeselection

000:Writeprogrammemory

001:Blockeraseprogrammemory

010:Reserved

011:Readprogrammemory

100:Reserved

101:Reserved

110:FWRNmode—Flashmemorywritefunctionenablemode

111:Reserved

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