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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT45F5R 데이터시트(PDF) 63 Page - Holtek Semiconductor Inc |
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HT45F5R 데이터시트(HTML) 63 Page - Holtek Semiconductor Inc |
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63 / 138 page  Rev. 1.10 �� De�e��e� 1�� �01� Rev. 1.10 �� De�e��e� 1�� �01� HT45F5R Charger ASSP Flash MCU HT45F5R Charger ASSP Flash MCU PTMn PTCKn PTPn PTPnI CCR �aptu�e input CCR output PTPnB PTM Function Pin Control Block Diagram Programming Considerations TheTMCounterRegistersandtheCapture/CompareCCRAandCCRPregisters,allhavealowand highbytestructure.Thehighbytescanbedirectlyaccessed,butasthelowbytescanonlybeaccessed viaaninternal8-bitbuffer,readingorwritingtotheseregisterpairsmustbecarriedoutinaspecific way.Theimportantpointtonoteisthatdatatransfertoandfromthe8-bitbufferanditsrelatedlow byteonlytakesplacewhenawriteorreadoperationtoitscorrespondinghighbyteisexecuted. AstheCCRAandCCRPregistersareimplementedinthewayshowninthefollowingdiagramand accessingtheseregisterpairsiscarriedoutinaspecificwayasdescribedabove,itisrecommended tousethe"MOV"instructiontoaccesstheCCRAandCCRPlowbyteregisters,namedxTMnAL andPTMnRPL,usingthefollowingaccessprocedures.AccessingtheCCRAorCCRPlowbyte registerswithoutfollowingtheseaccessprocedureswillresultinunpredictablevalues. Data Bus 8-�it Buffe� xTMnDH xTMnDL xTMnAH xTMnAL xTMn Counte� Registe� (Read only) xTMn CCRA Registe� (Read/W�ite) PTMnRPH PTMnRPL PTMn CCRP Registe� (Read/W�ite) Thefollowingstepsshowthereadandwriteprocedures: • WritingDatatoCCRAorCCRP ♦ Step1.WritedatatoLowBytexTMnALorPTMnRPL – notethatheredataisonlywrittentothe8-bitbuffer. ♦ Step2.WritedatatoHighBytexTMnAHorPTMnRPH – heredataiswrittendirectlytothehighbyteregistersandsimultaneouslydataislatched fromthe8-bitbuffertotheLowByteregisters. • ReadingDatafromtheCounterRegistersandCCRAorCCRP ♦ Step1.ReaddatafromtheHighBytexTMnDH,xTMnAHorPTMnRPH – heredataisreaddirectlyfromtheHighByteregistersandsimultaneouslydataislatched fromtheLowByteregisterintothe8-bitbuffer. ♦ Step2.ReaddatafromtheLowBytexTMnDL,xTMnALorPTMnRPL – thisstepreadsdatafromthe8-bitbuffer. |
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