HT45F4N datasheet(31/170 Pages) HOLTEK

31 / 170 page

Rev. 1.30

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Rev. 1.30

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HT45F4N/HT45FH4N

Power Bank Flash MCU

HT45F4N/HT45FH4N

Power Bank Flash MCU

RAM Data Memory

TheDataMemoryisavolatileareaof8-bitwideRAMinternalmemoryandisthelocationwhere

temporaryinformationisstored.

Structure

Dividedintotwosections,thefirstoftheseisanareaofRAM,knownastheSpecialFunctionData

Memory.Herearelocatedregisterswhicharenecessaryforcorrectoperationofthedevice.Many

oftheseregisterscanbereadfromandwrittentodirectlyunderprogramcontrol,however,some

remainprotectedfromusermanipulation.ThesecondareaofDataMemoryisknownastheGeneral

PurposeDataMemory,whichisreservedforgeneralpurposeuse.Alllocationswithinthisareaare

readandwriteaccessibleunderprogramcontrol.

00H

7FH

80H

FFH

Spe�ial Pu�pose

Data Me�o�y

Gene�al Pu�pose

Data Me�o�y

EEC at �0H in Bank 1

Bank 0

80H in Bank 1

BFH in Bank 1

Data Memory Structure

TheoverallDataMemoryissubdividedintotwobanks.TheSpecialPurposeDataMemoryregisters

areaccessibleinallbanks,withtheexceptionoftheEECregisterataddress40H,whichisonly

accessibleinBank1.SwitchingbetweenthedifferentDataMemorybanksisachievedbysettingthe

BankPointertothecorrectvalue.ThestartaddressoftheDataMemoryforthedeviceistheaddress

00H.

HT45F4N Datasheet(PDF) 31 Page - Holtek Semiconductor Inc