HT45F4MA datasheet(25/145 Pages) HOLTEK

25 / 145 page

Rev. 1.20

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Rev. 1.20

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HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

On-Chip Debug Support – OCDS

AnEVchipexistsforthepurposesofdeviceemulation.ThisEVchipdevicealsoprovidesan

“On-ChipDebug”functiontodebugthedeviceduringthedevelopmentprocess.TheEVchip

andtheactualMCUdevicesarealmostfunctionallycompatibleexceptforthe“On-ChipDebug”

function.UserscanusetheEVchipdevicetoemulatetherealchipdevicebehaviorbyconnecting

theOCDSDAandOCDSCKpinstotheHoltekHT-IDEdevelopmenttools.TheOCDSDApinis

theOCDSData/Addressinput/outputpinwhiletheOCDSCKpinistheOCDSclockinputpin.

WhenusersusetheEVchipfordebugging,otherfunctionswhicharesharedwiththeOCDSDA

andOCDSCKpinsintheactualMCUdevicewillhavenoeffectintheEVchip.However,thetwo

OCDSpinswhicharepin-sharedwiththeICPprogrammingpinsarestillusedastheFlashMemory

programmingpinsforICP.ForamoredetailedOCDSdescription,refertothecorresponding

documentnamed“Holteke-Linkfor8-bitMCUOCDSUser’sGuide”.

MCU Device

EV Chip Device

HT�5F�MA

HT�5V�MA

HT�5FH�MA

HT�5VH�MA

HT�5FH�MA-1

HT�5VH�MA-1

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

GND

VSS

G�ound

RAM Data Memory

TheDataMemoryisavolatileareaof8-bitwideRAMinternalmemoryandisthelocationwhere

temporaryinformationisstored.

Structure

Dividedintotwosections,thefirstoftheseisanareaofRAM,knownastheSpecialFunctionData

Memory.Herearelocatedregisterswhicharenecessaryforcorrectoperationofthedevice.Many

oftheseregisterscanbereadfromandwrittentodirectlyunderprogramcontrol,however,some

remainprotectedfromusermanipulation.ThesecondareaofDataMemoryisknownastheGeneral

PurposeDataMemory,whichisreservedforgeneralpurposeuse.Alllocationswithinthisareaare

readandwriteaccessibleunderprogramcontrol.

TheoverallDataMemoryissubdividedintotwobanks.TheSpecialPurposeDataMemoryregistersare

accessibleinallbanks,withtheexceptionoftheEECregisterataddress40H,whichisonlyaccessible

inBank1.SwitchingbetweenthedifferentDataMemorybanksisachievedbysettingtheBankPointer

tothecorrectvalue.ThestartaddressoftheDataMemoryforthedeviceistheaddress00H.

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