HT67F5652 datasheet(37/224 Pages) HOLTEK

37 / 224 page

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HT67F5652

24-Bit Delta Sigma A/D + LCD Flash MCU

HT67F5652

24-Bit Delta Sigma A/D + LCD Flash MCU

Data Memory Addressing

Forthedevicethatsupportstheextendedinstructions,thereisnoBankPointerforDataMemory.

ForDataMemorythedesiredSectorispointedbytheMP1HorMP2Hregisterandthecertain

DataMemoryaddressintheselectedsectorisspecifiedbytheMP1LorMP2Lregisterwhenusing

indirectaddressingaccess.

DirectAddressingcanbeusedinallsectorsusingthecorrespondinginstructionwhichcanaddress

allavailabledatamemoryspace.Fortheaccesseddatamemorywhichislocatedinanydata

memorysectorsexceptsector0,theextendedinstructionscanbeusedtoaccessthedatamemory

insteadofusingtheindirectaddressingaccess.Themaindifferencebetweenstandardinstructions

andextendedinstructionsisthatthedatamemoryaddress"m"intheextendedinstructionshas10

validbits,thehighbyteindicatesasectorandthelowbyteindicatesaspecificaddress.

General Purpose Data Memory

Allmicrocontrollerprogramsrequireanareaofread/writememorywheretemporarydatacanbe

storedandretrievedforuselater.ItisthisareaofRAMmemorythatisknownasGeneralPurpose

DataMemory.ThisareaofDataMemoryisfullyaccessiblebytheuserprogramingforbothreading

andwritingoperations.Byusingthebitoperationinstructionsindividualbitscanbesetorreset

underprogramcontrolgivingtheuseralargerangeofflexibilityforbitmanipulationintheData

Memory.

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".

HT67F5652 Datenblatt(PDF) 37 Page - Holtek Semiconductor Inc