HT69F30A datasheet(39/202 Pages) HOLTEK

39 / 202 page

Rev. 1.00

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HT69F30A/HT69F40A/HT69F50A

TinyPowerTM I/O Flash 8-Bit MCU with LCD & EEPROM

HT69F30A/HT69F40A/HT69F50A

TinyPowerTM I/O Flash 8-Bit MCU with LCD & EEPROM

Spe�ial Pu�pose

Data �emo�y

Gene�al Pu�pose

Data �emo�y

00H

7FH

80H

FFH

Bank 0

Bank �

Bank 0

40H in Bank 1

LCD �emo�y

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”instructionsindividualbitscan

besetorresetunderprogramcontrolgivingtheuseralargerangeofflexibilityforbitmanipulation

intheDataMemory.

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”.

HT69F30A Datasheet(PDF) 39 Page - Holtek Semiconductor Inc