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HT66F4530 数据表(PDF) 122 Page - Holtek Semiconductor Inc |
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HT66F4530 数据表(HTML) 122 Page - Holtek Semiconductor Inc |
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122 / 224 page  Rev. 1.00 1�� De�e��e� �1� �01� Rev. 1.00 1�3 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 A/D Converter Register Description OveralloperationoftheA/Dconverteriscontrolledusingseveralregisters.Areadonlyregisterpair existstostoretheA/Dconverterdata12-bitvalue.Theremainingtworegistersarecontrolregisters whichsetuptheoperatingandcontrolfunctionoftheA/Dconverter. Register Name Bit 7 6 5 4 3 2 1 0 SADOL (ADRFS=0) D3 D� D1 D0 — — — — SADOL (ADRFS=1) D7 D� D5 D4 D3 D� D1 D0 SADOH (ADRFS=0) D11 D10 D9 D8 D7 D� D5 D4 SADOH (ADRFS=1) — — — — D11 D10 D9 D8 SADC0 START ADBZ ADCEN ADRFS SACS3 SACS� SACS1 SACS0 SADC1 SAINS� SAINS1 SAINS0 SAVRS1 SAVRS0 SACKS� SACKS1 SACKS0 A/D Converter Registers List A/D Converter Data Registers – SADOL, SADOH Asthesedevicescontainaninternal12-bitA/Dconverter,itrequirestwodataregisterstostorethe convertedvalue.Theseareahighbyteregister,knownasSADOH,andalowbyteregister,known asSADOL.Aftertheconversionprocesstakesplace,theseregisterscanbedirectlyreadbythe microcontrollertoobtainthedigitisedconversionvalue.Asonly12bitsofthe16-bitregisterspace isutilised,theformatinwhichthedataisstorediscontrolledbytheADRFSbitintheSADC0 registerasshownintheaccompanyingtable.D0~D11aretheA/Dconversionresultdatabits.Any unusedbitswillbereadaszero.NotethatA/DdataregisterscontentswillbeunchangediftheA/D converterisdisabled. ADRFS SADOH SADOL 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 0 D11 D10 D9 D8 D7 D� D5 D4 D3 D� D1 D0 0 0 0 0 1 0 0 0 0 D11 D10 D9 D8 D7 D� D5 D4 D3 D� D1 D0 A/D Data Registers A/D Converter Control Registers – SADC0, SADC1 TocontrolthefunctionandoperationoftheA/Dconverter,twocontrolregistersknownasSADC0 andSADC1areprovided.These8-bitregistersdefinefunctionssuchastheselectionofwhich analogchannelisconnectedtotheinternalA/Dconverter,thedigitiseddataformat,theA/Dclock sourceaswellascontrollingthestartfunctionandmonitoringtheA/Dconverterbusystatus.As thesedevicescontainonlyoneactualanalogtodigitalconverterhardwarecircuit,eachofthe externalorinternalanalogsignalinputsmustberoutedtotheconverter.TheSACS3~SACS0bitsin theSADC0registerareusedtodeterminewhichexternalchannelinputisselectedtobeconverted. TheSAINS2~SAINS0bitsintheSADC1registerareusedtodeterminethattheanalogsignaltobe convertedcomesfromtheinternalanalogsignalorexternalanalogchannelinput. Therelevantpin-sharedfunctionselectionbitsdeterminewhichpinsonI/OPortsareusedasanalog inputsfortheA/DconverterinputandwhichpinsarenottobeusedastheA/Dconverterinput. WhenthepinisselectedtobeanA/Dinput,itsoriginalfunctionwhetheritisanI/Oorotherpin- sharedfunctionwillberemoved.Inaddition,anyinternalpull-highresistorconnectedtothepinwill beautomaticallyremovedifthepinisselectedtobeanA/Dconverterinput. |
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