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HT66F4530 数据表(PDF) 124 Page - Holtek Semiconductor Inc |
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HT66F4530 数据表(HTML) 124 Page - Holtek Semiconductor Inc |
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124 / 224 page  Rev. 1.00 1�4 De�e��e� �1� �01� Rev. 1.00 1�5 De�e��e� �1� �01� HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers HT66F4530/HT66F4540/HT66F4550 A/D Flash MCU with Dual Operational Amplifiers Bit5 ADCEN:A/Dconverterfunctionenablecontrol 0:Disable 1:Enable ThisbitcontrolstheA/Dinternalfunction.Thisbitshouldbesettoonetoenable theA/Dconverter.Ifthebitissetlow,thentheA/Dconverterwillbeswitchedoff reducingthesedevicespowerconsumption.WhentheA/Dconverterfunctionis disabled,thecontentsoftheA/DdataregisterpairknownasSADOHandSADOL willbeunchanged. Bit4 ADRFS:A/Dconverterdataformatselect 0:A/Dconverterdataformat→SADOH=D[11:4];SADOL=D[3:0] 1:A/Dconverterdataformat→SADOH=D[11:8];SADOL=D[7:0] Thisbitcontrolstheformatofthe12-bitconvertedA/DvalueinthetwoA/Ddata registers.DetailsareprovidedintheA/Ddataregistersection. Bit3~0 SACS3~SACS0:A/Dconverterexternalanalogchannelinputselect 0000:AN0 0001:AN1 0010:AN2 0011:AN3 0100:AN4 0101:AN5 0110:AN6 0111:AN7 1000~1111:Non-existedchannel,theinputwillbefloatingifselected • SADC1 Register Bit 7 6 5 4 3 2 1 0 Na�e SAINS� SAINS1 SAINS0 SAVRS1 SAVRS0 SACKS� SACKS1 SACKS0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit7~5 SAINS2~SAINS0:A/Dconverterinputsignalselect 000:Externalinput–Externalanalogchannelinput 001:Internalinput–Internalhighperformancebandgapreferencevoltage,VBGREF 010:Internalinput–InternalSDoperationalamplifier0outputsignal,OPA0O 011:Internalinput–InternalSDoperationalamplifier1outputsignal,OPA1O 100:Internalinput–Unused,connectedtoground 101~111:Externalinput–Externalanalogchannelinput CaremustbetakeniftheSAINS2~SAINS0bitsaresetfrom"001"to"100"toselect theinternalanalogsignaltobeconverted.Whentheinternalanalogsignalisselected tobeconverted,theexternalinputpinmustneverbeselectedastheA/Dinputsignal byproperlysettingtheSACS3~SACS0bits.Otherwise,theexternalchannelinputwill beconnectedtogetherwiththeinternalanalogsignal.Thiswillresultinunpredictable situationssuchasanirreversibledamage. Bit4~3 SAVRS1~SAVRS0:A/Dconverterreferencevoltageselect 00:VREFpin 01:InternalA/Dconverterpower,AVDD 1x:VREFpin ThesebitsareusedtoselecttheA/Dconverterreferencevoltage.Caremustbetaken iftheSAVRS1~SAVRS0bitsaresetto"01"toselecttheinternalA/Dconverterpower asthereferencevoltagesource.WhentheinternalA/Dconverterpowerisselected asthereferencevoltage,theVREFpincannotbeconfiguredasthereferencevoltage inputbyproperlyconfiguringthecorrespondingpin-sharedfunctioncontrolbits. Otherwise,theexternalinputvoltageonVREFpinwillbeconnectedtotheinternalA/D converterpower. |
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