ETIC 2230 Betriebsanweisung PDF herunterladen (Seite 85)

Rev. 1.10 84 November 14, 2014 Rev. 1.10 85 November 14, 2014

HT66FW2230

Wireless Charger A/D Flash 8-Bit MCU

A/D Converter Data Registers – ADRL, ADRH

Asthedevicecontainsaninternal12-bitA/Dconverter,theyrequiretwodataregisterstostorethe

convertedvalue.Theseareahighbyteregister,knownasADRH,andalowbyteregister,known

asADRL.Aftertheconversionprocesstakesplace,theseregisterscanbedirectlyreadbythe

microcontrollertoobtainthedigitisedconversionvalue.Asonly12bitsofthe16-bitregisterspace

isutilised,theformatinwhichthedataisstorediscontrolledbytheADRFSbitintheADCR0

unusedbitswillbereadaszero.

ADRFS

ADRH ADRL

7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0

0 D11 D10 D9 D8 D7 D6 D5

D4 D3 D2 D1 D0 0 0 0 0

1 0 0 0 0 D11 D10 D9 D8 D7 D6 D5

D4 D3 D2 D1 D0

A/D Data Registers

A/D Converter Control Registers – ADCR0, ADCR1

TocontrolthefunctionandoperationoftheA/Dconverter,threecontrolregistersknownasADCR0,

ADCR1areprovided.These8-bitregistersdenefunctionssuchastheselectionofwhichanalog

channelisconnectedtotheinternalA/Dconverter,thedigitiseddataformat,theA/Dclocksource

aswellascontrollingthestartfunctionandmonitoringtheA/Dconverterendofconversionstatus.

TheACS4~ACS0bitsintheADCR0registerdenetheADCinputchannelnumber.Asthedevice

containsonlyoneactualanalogtodigitalconverterhardwarecircuit,eachoftheindividual8analog

inputsmustberoutedtotheconverter.ItisthefunctionoftheACS4~ACS0bitstodetermine

whichanalogchannelinputsignals,DEM_OPA_output,OCP_OPA_outputorinternal1.04Vis

actuallyconnectedtotheinternalA/Dconverter.

ThePAS0controlregistercontainsthePAS07~PAS00bitsandPAS1controlregistercontains

thePAS17~PAS10bitswhichdeterminewhichpinsonPortAareusedasanaloginputsforthe

A/DconverterinputandwhichpinsarenottobeusedastheA/Dconverterinput.Settingthe

correspondingbithighwillselecttheA/Dinputfunction,clearingthebittozerowillselecteither

theI/Oorotherpin-sharedfunction.WhenthepinisselectedtobeanA/Dinput,itsoriginal

functionwhetheritisanI/Oorotherpin-sharedfunctionwillberemoved.Inaddition,anyinternal

pull-highresistorsconnectedtothesepinswillbeautomaticallyremovedifthepinisselectedtobe

anA/Dinput.

ADCR0 Register

Bit 7 6 5 4 3 2 1 0

Name START EOCB ADOFF ACS4 ACS3 ACS2 ACS1 ACS0

R/W R/W R R/W R/W R/W R/W R/W R/W

POR 0 1 1 0 0 0 0 0

Bit7 START:StarttheA/Dconversion

0-->1-->0:start

0-->1:resettheA/DconverterandsetEOCBto"1"

ThisbitisusedtoinitiateanA/Dconversionprocess.Thebitisnormallylowbutifset

highandthenclearedlowagain,theA/Dconverterwillinitiateaconversionprocess.

WhenthebitissethightheA/Dconverterwillbereset.

Bit6 EOCB:EndofA/Dconversionag

0:A/Dconversionended

1:A/Dconversioninprogress

ThisreadonlyagisusedtoindicatewhenanA/Dconversionprocesshascompleted.

Whentheconversionprocessisrunningthebitwillbehigh.

1 2 ... 80 81 82 83 84 85 86 87 88 89 90 ... 147 148

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