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HT45F65 Datasheet(PDF) 142 Page - Holtek Semiconductor Inc |
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HT45F65 Datasheet(HTML) 142 Page - Holtek Semiconductor Inc |
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142 / 231 page  Rev. 1.60 1�� �ove��e� ��� �01� Rev. 1.60 1�3 �ove��e� ��� �01� HT45F65/HT45F66/HT45F67 Glucose Meter 8-Bit Flash MCU ADRL, ADRH Register Bit ADRH ADRL 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 �a�e D11 D10 D9 D8 D7 D6 D� D� D3 D� D1 D0 — — — — R/W R R R R R R R R R R R R — — — — POR x x x x x x x x x x x x — — — — "x" unknown "—"unimplemented,readas"0" D11~D0:ADCconversiondata A/D Converter Control Registers – ADCR0, ADCR1, ADCR2 TocontrolthefunctionandoperationoftheA/Dconverter,threecontrolregistersknownasADCR0, ADCR1andADCR2areprovided.These8-bitregistersdefinefunctionssuchastheselectionofwhich analogchannelisconnectedtotheinternalA/Dconverter,thedigitiseddataformat,theA/Dclock sourceaswellascontrollingthestartfunctionandmonitoringtheA/Dconverterendofconversion status.TheACS2~ACS0bitsintheADCR0registerdefinetheADCinputchannelnumber.Asthe devicecontainsonlyoneactualanalogtodigitalconverterhardwarecircuit,eachoftheindividual8 analoginputsmustberoutedtotheconverter.ItisthefunctionoftheACS2~ACS0bitstodetermine whichanalogchannelinputpinisactuallyconnectedtotheinternalA/Dconverter. ADCR0 Register Bit 7 6 5 4 3 2 1 0 �a�e START EOCB ADOFF — — ACS� ACS1 ACS0 R/W R/W R R/W — — R/W R/W R/W POR 0 1 1 — — 0 0 0 Bit7 START:StarttheA/Dconversion 0→1→0:Start 0→1:ResettheA/DconverterandsetEOCBto"1" ThisbitisusedtoinitiateanA/Dconversionprocess.Thebitisnormallylowbutifset highandthenclearedlowagain,theA/Dconverterwillinitiateaconversionprocess. WhenthebitissethightheA/Dconverterwillbereset. Bit6 EOCB:EndofA/Dconversionflag 0:A/Dconversionended 1:A/Dconversioninprogress ThisreadonlyflagisusedtoindicatewhenanA/Dconversionprocesshascompleted. Whentheconversionprocessisrunning,thebitwillbehigh. Bit5 ADOFF:ADCmodulepoweron/offcontrolbit 0:ADCmodulepoweron 1:ADCmodulepoweroff ThisbitcontrolsthepowertotheA/Dinternalfunction.Thisbitshouldbecleared tozerotoenabletheA/Dconverter.IfthebitissethighthentheA/Dconverterwill beswitchedoffreducingthedevicepowerconsumption.AstheA/Dconverterwill consumealimitedamountofpower,evenwhennotexecutingaconversion,thismay beanimportantconsiderationinpowersensitivebatterypoweredapplications. Note:1.ItisrecommendedtosetADOFF=1beforeenteringIDLE/SLEEPModefor savingpower. 2.ADOFF=1willpowerdowntheADCmodule. |
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