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HT46R068B 데이터시트(PDF) 25 Page - Holtek Semiconductor Inc

부품명 HT46R068B
상세설명  Enhanced A/D 8-Bit OTP MCU
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제조업체  HOLTEK [Holtek Semiconductor Inc]
홈페이지  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT46R068B 데이터시트(HTML) 25 Page - Holtek Semiconductor Inc

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HT46R068B/HT46R069B
Enhanced A/D 8-Bit OTP MCU
HT46R068B/HT46R069B
Enhanced A/D 8-Bit OTP MCU
Special Function Registers
Toensuresuccessfuloperationofthemicrocontroller,certaininternalregistersareimplementedin
theDataMemoryarea.Theseregistersensurecorrectoperationofinternalfunctionssuchastimers,
interrupts,etc.,aswellasexternalfunctionssuchasI/Odatacontrol.Thelocationoftheseregisters
withintheDataMemorybeginsattheaddress"00H"andaremappedfromBank0toBank7.Any
unusedDataMemorylocationsbetweenthesespecialfunctionregistersandthepointwherethe
GeneralPurposeMemorybeginsisreservedandattemptingtoreaddatafromtheselocationswill
returnavalueof"00H".
Indirect Addressing Registers – IAR0, IAR1
TheIndirectAddressingRegisters,IAR0andIAR1,althoughhavingtheirlocationsinnormalRAM
registerspace,donotactuallyphysicallyexistasnormalregisters.Themethodofindirectaddressing
forRAMdatamanipulationusestheseIndirectAddressingRegistersandMemoryPointers,in
contrasttodirectmemoryaddressing,wheretheactualmemoryaddressisspecified.Actionsonthe
IAR0andIAR1registerswillresultinnoactualreadorwriteoperationtotheseregistersbutrather
tothememorylocationspecifiedbytheircorrespondingMemoryPointer,MP0orMP1.Actingas
apair,IAR0withMP0andIAR1withMP1cantogetheraccessdatafromtheDataMemory.As
theIndirectAddressingRegistersarenotphysicallyimplemented,readingtheIndirectAddressing
Registersindirectlywillreturnaresultof"00H"andwritingtotheregistersindirectlywillresultin
nooperation.
Memory Pointers – MP0, MP1
TwoMemoryPointers,knownasMP0andMP1areprovided.TheseMemoryPointersare
physicallyimplementedintheDataMemoryandcanbemanipulatedinthesamewayasnormal
registersprovidingaconvenientwaywithwhichtoindirectlyaddressandtrackdata.MP0canonly
beusedtoindirectlyaddressdatainBank0whileMP1canbeusedtoaddressdatafromBank0
andBank7.WhenanyoperationtotherelevantIndirectAddressingRegistersiscarriedout,the
actualaddressthatthemicrocontrollerisdirectedto,istheaddressspecifiedbytherelatedMemory
Pointer.NotethatindirectaddressingusingMP1andIAR1mustbeusedtoaccessanydatainBank
1~Bank7.ThefollowingexampleshowshowtoclearasectionoffourDataMemorylocations
alreadydefinedaslocationsadres1toadres4.
HT46R068B
HT46R069B
00H
IAR0
IAR0
01H
MP0
MP0
0�H
IAR1
IAR1
03H
MP1
MP1
04H
BP
BP
05H
ACC
ACC
06H
PCL
PCL
07H
TBLP
TBLP
08H
TBLH
TBLH
09H
WDTS
WDTS
0AH
STATUS
STATUS
0BH
INTC0
INTC0
0CH
TMR0
TMR0
0DH
TMR0C
TMR0C
0EH
TMR1
TMR1


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