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HT66F0176 Datasheet(PDF) 87 Page - Holtek Semiconductor Inc |
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HT66F0176 Datasheet(HTML) 87 Page - Holtek Semiconductor Inc |
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87 / 165 page  Rev. 1.20 �6 ����st 2�� 201� Rev. 1.20 �� ����st 2�� 201� HT66F0176 A/D Flash MCU with EEPROM HT66F0176 A/D Flash MCU with EEPROM • SADC2 Register Bit 7 6 5 4 3 2 1 0 Name ENOP� VBGEN VREFIEN VREFOEN S�VRS3 S�VRS2 S�VRS1 S�VRS0 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 ENOPA:A/DconverterOPAfunctionenablecontrol 0:Disable 1:Enable ThisbitcontrolstheinternalOPAfunctiontoprovidevariousreferencevoltagefor theA/Dconverter.Whenthebitissethigh,theinternalreferencevoltage,VR,canbe usedastheinternalconvertedsignalorreferencevoltagebytheA/Dconverter.Ifthe internalreferencevoltageisnotusedbytheA/Dconverter,thentheOPAfunction shouldbeproperlyconfiguredtoconservepower. Bit6 VBGEN:InternalBandgapreferencevoltageenablecontrol 0:Disable 1:Enable ThisbitcontrolstheinternalBandgapcircuiton/offfunctiontotheA/Dconverter. Whenthebitissethigh,theBandgapreferencevoltagecanbeusedbytheA/D converter.IftheBandgapreferencevoltageisnotusedbytheA/Dconverterand theLVDorLVRfunctionisdisabled,thenthebandgapreferencecircuitwillbe automaticallyswitchedofftoconservepower.WhentheBandgapreferencevoltage isswitchedonforusebytheA/Dconverter,atime,tBGS,shouldbeallowedforthe BandgapcircuittostabilisebeforeimplementinganA/Dconversion. Bit5 VREFIEN:VREFpinselectionbit 0:Disable–VREFpinisnotselected 1:Enable–VREFpinisselected Bit4 VREFOEN:VREFOpinselectionbit 0:Disable–VREFOpinisnotselected 1:Enable–VREFOpinisselected Bit3~0 SAVRS3~SAVRS0:A/DConverterreferencevoltageselect 0000:VDD 0001:VREF 0010:VREF×2 0011:VREF×3 0100:VREF×4 1001:Reserved,cannotbeused 1010:VBG×2 1011:VBG×3 1100:VBG×4 Others:VDD WhentheA/Dconverterreferencevoltagesourceisselectedtoderivefromthe internalVBGvoltage,thereferencevoltagewhichcomesfromtheexternalVDDor VREFpinwillbeautomaticallyswitchedoff. |
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