HT69F240 datasheet(22/172 Pages) HOLTEK

22 / 172 page

Rev. 1.20

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Rev. 1.20

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HT69F240

I/O 8-Bit Flash MCU with LED/LCD Driver

HT69F240

I/O 8-Bit Flash MCU with LED/LCD Driver

Structure

TheDataMemoryissubdividedintotwobanks,allofwhichareimplementedin8-bitwideRAM.

TheDataMemorylocatedinBank0issubdividedintotwosections,theSpecialPurposeData

MemoryandtheGeneralPurposeDataMemory.RegisterswhicharelocatedintheSpecialpurpose

datamemoryandcommontoallmicrocontrollers,suchasACC,PCL,etc.,havethesameData

MemoryaddressinallbanksexcepttheEECregisterlocatedat40HinBank1.

Type

Banks

Spe�ial Pu�pose

0: 00H~7FH

1: 40H(EEC)

Gene�al Pu�pose

0: 80H~FFH

1: 80H~FFH

Spe�ial Pu�pose

Data �emo�y

Gene�al Pu�pose

Data �emo�y

00H

7FH

80H

FFH

Bank 0

Bank 1

Bank 0

EEC at 40H in Bank 1

Data Memory Structure

General Purpose Data Memory

Allmicrocontrollerprogramsrequireanareaofread/writememorywheretemporarydatacanbe

storedandretrievedforuselater.ItisthisareaofRAMmemorythatisknownasGeneralPurpose

DataMemory.ThisareaofDataMemoryisfullyaccessiblebytheuserprogramingforbothreading

andwritingoperations.Byusingthe"SET[m].i"and"CLR[m].i"instructionsindividualbitscanbe

setorresetunderprogramcontrolgivingtheuseralargerangeofflexibilityforbitmanipulationin

theDataMemory.

Special Purpose Data Memory

This area of Data Memory is where registers, necessary for the correct operation of the

microcontroller,arestored.Mostoftheregistersarebothreadableandwriteablebutsomeare

protectedandarereadableonly,thedetailsofwhicharelocatedundertherelevantSpecialFunction

Registersection.Notethatforlocationsthatareunused,anyreadinstructiontotheseaddresseswill

returnthevalue"00H".

HT69F240 Datasheet(PDF) 22 Page - Holtek Semiconductor Inc

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