HT45F4M datasheet(17/138 Pages) HOLTEK

17 / 138 page

Rev. 1.10

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Rev. 1.10

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HT45F4M

Lithium Battery Backup Power ASSP MCU

HT45F4M

Lithium Battery Backup Power ASSP MCU

Flash Program Memory

TheProgramMemoryisthelocationwheretheusercodeorprogramisstored.Forthisdevicethe

ProgramMemoryisFlashtype,whichmeansitcanbeprogrammedandre-programmedalarge

numberoftimes,allowingtheusertheconvenienceofcodemodificationonthesamedevice.

Byusingtheappropriateprogrammingtools,thisFlashdeviceoffersuserstheflexibilityto

convenientlydebuganddeveloptheirapplicationswhilealsoofferingameansoffieldprogramming

andupdating.

Structure

TheProgramMemoryhasacapacityof2K×16bits.TheProgramMemoryisaddressedbythe

ProgramCounterandalsocontainsdata,tableinformationandinterruptentries.Tabledata,which

canbesetupinanylocationwithintheProgramMemory,isaddressedbyaseparatetablepointer

Special Vectors

WithintheProgramMemory,certainlocationsarereservedfortheresetandinterrupts.Thelocation

000Hisreservedforusebythedeviceresetforprograminitialisation.Afteradeviceresetis

initiated,theprogramwilljumptothislocationandbeginexecution.

16 b it s

000H

004H

008H

00 CH

010H

014H

018H

01 CH

020H

024H

028H

7 FFH

In it ia li sa ti on

Ve ct or

Ov er V ol ta ge

Pr ot ec ti on In te rr up t

Ov er C ur re nt

Pr ot ec ti on In te rr up t

Ex te rn al

In te rr up t 0 V ec to r

Mu lt i_ Fu nc ti on

In te rr up t 0 V ec to r

Mu lt i_ Fu nc ti on

In te rr up t 1 V ec to r

Mu lt i_ Fu nc ti on

In te rr up t 2 Ve ct or

A/ D

In te rr up t Ve ct or

Ti me B as e 0

I nt er ru pt V ec to r

Ti me B as e 1

I nt er ru pt V ec to r

Ex te ma l

I nt er ru pt 1 V ec to r

Program Memory Structure

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