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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT45F77 датащи(PDF) 76 Page - Holtek Semiconductor Inc |
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HT45F77 датащи(HTML) 76 Page - Holtek Semiconductor Inc |
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76 / 203 page  Rev. 1.20 7� De�e��e� 1�� 201� Rev. 1.20 77 De�e��e� 1�� 201� HT45F77 Body Fat Scale Flash MCU HT45F77 Body Fat Scale Flash MCU Bit1 TP1CPS:TP1_0,TP1_1pinselection 0:TP1_0 1:TP1_1 WhenTM1isenabled,theoutputfunctionofTP1_0istimer,thentheTP1_1isI/O, andviceversa. Bit0 TP0CPS:TP0_0,TP0_1pinselection 0:TP0_0 1:TP0_1 WhenTM0isenabled,theoutputfunctionofTP0_0istimer,thentheTP0_1isI/O, andviceversa. Programming Considerations TheTMCounterRegistersandtheCapture/CompareCCRAandCCRPregisters,being10-bit,all havealowandhighbytestructure.Thehighbytescanbedirectlyaccessed,butasthelowbytes canonlybeaccessedviaaninternal8-bitbuffer,readingorwritingtotheseregisterpairsmustbe carriedoutinaspecificway.Theimportantpointtonoteisthatdatatransfertoandfromthe8-bit bufferanditsrelatedlowbyteonlytakesplacewhenawriteorreadoperationtoitscorresponding highbyteisexecuted.AstheCCRAandCCRPregistersareimplementedinthewayshowninthe followingdiagramandaccessingtheregisteriscarriedoutinaspecificwaydescribedabove,it isrecommendedtousethe"MOV"instructiontoaccesstheCCRAandCCRPlowbyteregisters, namedTMxAL/PTMxALandPTMxRPL,usingthefollowingaccessprocedures.Accessing theCCRAorCCRPlowbyteregisterwithoutfollowingtheseaccessprocedureswillresultin unpredictablevalues. Data Bus 8-�it Buffe� TMxDH/ PTMxDH TMxDL/ PTMxDL PTMxRPH PTMxRPL TMxAH/ PTMxAH TMxAL/ PTMxAL TM Counte� Registe� (Read only) TM CCRA Registe� (Read/W�ite) TM CCRP Registe� (Read/W�ite) Thefollowingstepsshowthereadandwriteprocedures: • WritingDatatoCCRAorCCRP ♦ Step1.WritedatatoLowByteTMxAL/PTMxALorPTMxRPL – Notethatheredataisonlywrittentothe8-bitbuffer. ♦ Step2.WritedatatoHighByteTMxAH/PTMxAHorPTMxRPH – Heredataiswrittendirectlytothehighbyteregistersandsimultaneouslydataislatched fromthe8-bitbuffertotheLowByteregisters. • ReadingDatafromtheCounterRegistersandCCRAorCCRP ♦ Step1.ReaddatafromtheHighByteTMxDH/PTMxDH,TMxAH/PTMxAHorPTMxRPH – HeredataisreaddirectlyfromtheHighByteregistersandsimultaneouslydataislatched fromtheLowByteregisterintothe8-bitbuffer. ♦ Step2.ReaddatafromtheLowByteTMxDL/PTMxDL,TMxAL/PTMxALorPTMxRPL – Thisstepreadsdatafromthe8-bitbuffer. |
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