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HT46R068B 데이터시트(PDF) 23 Page - Holtek Semiconductor Inc

부품명 HT46R068B
상세설명  Enhanced A/D 8-Bit OTP MCU
Download  135 Pages
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제조업체  HOLTEK [Holtek Semiconductor Inc]
홈페이지  http://www.holtek.com
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HT46R068B/HT46R069B
Enhanced A/D 8-Bit OTP MCU
HT46R068B/HT46R069B
Enhanced A/D 8-Bit OTP MCU
Data Memory
TheDataMemoryisavolatileareaof8-bitwideRAMinternalmemoryandisthelocationwhere
temporaryinformationisstored.
Structure
Dividedintotwosections,thefirstoftheseisanareaofRAMwherespecialfunctionregistersare
located.Theseregistershavefixedlocationsandarenecessaryforcorrectoperationofthedevice.
Manyoftheseregisterscanbereadfromandwrittentodirectlyunderprogramcontrol,however,
someremainprotectedfromusermanipulation.ThesecondareaofDataMemoryisreservedfor
generalpurposeuse.Alllocationswithinthisareaarereadandwriteaccessibleunderprogram
control.
Device
Capacity
Banks
HT46R068B
51�x8
0~3
HT46R069B
10�4x8
0~7
ThetwosectionsofDataMemory,theSpecialPurposeandGeneralPurposeDataMemoryare
locatedatconsecutivelocations.AllareimplementedinRAMandare8bitswidebutthelengthof
eachmemorysectionisdictatedbythetypeofmicrocontrollerchosen.ThestartaddressoftheData
Memoryforalldevicesistheaddress"00H".
Allmicrocontrollerprogramsrequireanareaofread/writememorywheretemporarydatacanbe
storedandretrievedforuselater.ItisthisareaofRAMmemorythatisknownasGeneralPurpose
DataMemory.ThisareaofDataMemoryisfullyaccessiblebytheuserprogramforbothreadand
writeoperations.Byusingthe"SET[m].i"and"CLR[m].i"instructionsindividualbitscanbeset
orresetunderprogramcontrolgivingtheuseralargerangeofflexibilityforbitmanipulationinthe
DataMemory.
Forsomedevices,theDataMemoryissubdividedintoseveralbanks,whichareselectedusing
aBankPointer.OnlydatainBank0canbedirectlyaddressed,datainBank1~Bank7mustbe
indirectlyaddressed.


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