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HT45F75 Datasheet(PDF) 121 Page - Holtek Semiconductor Inc |
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HT45F75 Datasheet(HTML) 121 Page - Holtek Semiconductor Inc |
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121 / 190 page  Rev. 1.10 1�0 De�e��e� 1�� �01� Rev. 1.10 1�1 De�e��e� 1�� �01� HT45F75 Body Fat Scale Flash MCU HT45F75 Body Fat Scale Flash MCU SIMC0 Register Bit 7 6 5 4 3 2 1 0 Na�e SIM� SIM1 SIM0 — SIMDBC1 SIMDBC0 SIMEN SIMICF R/W R/W R/W R/W — R/W R/W R/W R/W POR 1 1 1 — 0 0 0 0 Bit7~5 SIM2~SIM0:SIMOperatingModeControl 000:SPImastermode;SPIclockisfSYS/4 001:SPImastermode;SPIclockisfSYS/16 010:SPImastermode;SPIclockisfSYS/64 011:SPImastermode;SPIclockisfSUB 100:SPImastermode;SPIclockisTM0CCRPmatchfrequency/2 101:SPIslavemode 110:I2Cslavemode 111:Unusedmode ThesebitssetuptheoveralloperatingmodeoftheSIMfunction.Aswellasselecting iftheI2CorSPIfunction,theyareusedtocontroltheSPIMaster/Slaveselection andtheSPIMasterclockfrequency.TheSPIclockisafunctionofthesystemclock butcanalsobechosentobesourcedfromthefSUBorTM0.IftheSPISlaveModeis selectedthentheclockwillbesuppliedbyanexternalMasterdevice. Bit4 Unimplemented,readas“0” Bit3~2 SIMDBC1~SIMDBC0:I2CDebounceTimeSelection 00:Nodebounce 01:2systemclockdebounce 1x:4systemclockdebounce Bit1 SIMEN:SIMControl 0:Disable 1:Enable Thebitistheoverallon/offcontrolfortheSIMinterface.WhentheSIMENbitis clearedtozerotodisabletheSIMinterface,theSDI,SDO,SCKandSCS,orSDA andSCLlineswillbeinafloatingconditionandtheSIMoperatingcurrentwillbe reducedtoaminimumvalue.WhenthebitishightheSIMinterfaceisenabled.The SIMconfigurationoptionmusthavefirstenabledtheSIMinterfaceforthisbittobe effective.IftheSIMisconfiguredtooperateasanSPIinterfaceviatheSIM2~SIM0 bits,thecontentsoftheSPIcontrolregisterswillremainattheprevioussettingswhen theSIMENbitchangesfromlowtohighandshouldthereforebefirstinitialisedby theapplicationprogram.IftheSIMisconfiguredtooperateasanI2Cinterfaceviathe SIM2~SIM0bitsandtheSIMENbitchangesfromlowtohigh,thecontentsoftheI2C controlbitssuchasHTXandTXAKwillremainattheprevioussettingsandshould thereforebefirstinitialisedbytheapplicationprogramwhiletherelevantI2Cflags suchasHCF,HAAS,HBB,SRWandRXAKwillbesettotheirdefaultstates. Bit0 SIMICF:SIMIncompletedFlag SIMICFisofnousedinI2CmodeofSIM,pleaseignorethisflagwhenoperateinI2C mode. |
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