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HT46R068B Datasheet(PDF) 20 Page - Holtek Semiconductor Inc |
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HT46R068B Datasheet(HTML) 20 Page - Holtek Semiconductor Inc |
20 / 135 page Rev. 1.50 �0 �e���a�� 05� �015 Rev. 1.50 �1 �e���a�� 05� �015 HT46R068B/HT46R069B Enhanced A/D 8-Bit OTP MCU HT46R068B/HT46R069B Enhanced A/D 8-Bit OTP MCU Special Vectors WithintheProgramMemory,certainlocationsarereservedforspecialusagesuchasresetand interrupts. • ResetVector Thisvectorisreservedforusebythedeviceresetforprograminitialisation.Afteradevicereset isinitiated,theprogramwilljumptothislocationandbeginexecution. • Externalinterruptvector Thisvectorisusedbytheexternalinterrupt.Iftheexternalinterruptpinonthedevicereceives anedgetransition,theprogramwilljumptothislocationandbeginexecutioniftheexternal interruptisenabledandthestackisnotfull.Theexternalinterruptactiveedgetransitiontype, whetherhightolow,lowtohighorbothisspecifiedintheCTRL1register. • Timer/Event0/1/2counterinterruptvector ThisinternalvectorisusedbytheTimer/EventCounters.IfaTimer/EventCounteroverflow occurs,theprogramwilljumptoitsrespectivelocationandbeginexecutioniftheassociated Timer/EventCounterinterruptisenabledandthestackisnotfull. • Multi-functioninterruptvector TheMulti-functionInterruptvectorissharedbyseveralinternalfunctions:aTimeBaseoverflow, anSPI/I2CorSPIAdatatransfercompletion.Theprogramwilljumptothislocationandbegin executioniftherelevantinterruptisenabledandthestackisnotfull. Look-up Table AnylocationwithintheProgramMemorycanbedefinedasalook-uptablewhereprogrammerscan storefixeddata.Tousethelook-uptable,thetablepointermustfirstbesetupbyplacingthelower orderaddressofthelookupdatatoberetrievedinthetablepointerregister,TBLP.Thisregister definesthelower8-bitaddressofthelook-uptable. Aftersettingupthetablepointer,thetabledatacanberetrievedfromthecurrentProgramMemory pageorlastProgramMemorypageusingthe"TABRDC[m]"or"TABRDL[m]"instructions, respectively.Whentheseinstructionsareexecuted,thelowerordertablebytefromtheProgram MemorywillbetransferredtotheuserdefinedDataMemoryregister[m]asspecifiedinthe instruction.ThehigherordertabledatabytefromtheProgramMemorywillbetransferredtothe TBLHspecialregister.Anyunusedbitsinthistransferredhigherorderbytewillbereadas"0". Thefollowingdiagramillustratestheaddressing/dataflowofthelook-uptable: R egi st er T BL H Us er S el ec te d R egi st er Hi g h B y te Low B y te Las t page or pr es en t p age PC x~ PC 8 PC H ig h By te TB LP R egi st er Da ta 16 bi ts Pr og ra m Me mo ry |
Número de pieza similar - HT46R068B_15 |
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Descripción similar - HT46R068B_15 |
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