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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT67F5652 датащи(PDF) 64 Page - Holtek Semiconductor Inc |
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HT67F5652 датащи(HTML) 64 Page - Holtek Semiconductor Inc |
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64 / 224 page  Rev. 1.00 �4 De�e��e� 0�� �01� Rev. 1.00 �5 De�e��e� 0�� �01� HT67F5652 24-Bit Delta Sigma A/D + LCD Flash MCU HT67F5652 24-Bit Delta Sigma A/D + LCD Flash MCU • CTRL Register Bit 7 6 5 4 3 2 1 0 Na�e FSYSON — — — — LVRF LRF WRF R/W R/W — — — — R/W R/W R/W POR 0 — — — — x 0 0 "x" unknown Bit7 FSYSON:fSYSControlinIDLEMode Describedelsewhere. Bit6~3 Unimplemented,readas"0" Bit2 LVRF:LVRfunctionresetflag Describedelsewhere. Bit1 LRF:LVRControlregistersoftwareresetflag Describedelsewhere. Bit0 WRF:WDTControlregistersoftwareresetflag 0:Notoccur 1:Occurred ThisbitissethighbytheWDTControlregistersoftwareresetandclearedbythe applicationprogram.Notethatthisbitcanonlybeclearedtozerobytheapplication program. Watchdog Timer Operation TheWatchdogTimeroperatesbyprovidingadeviceresetwhenitstimeroverflows.Thismeans thatintheapplicationprogramandduringnormaloperationtheuserhastostrategicallyclearthe WatchdogTimerbeforeitoverflowstopreventtheWatchdogTimerfromexecutingareset.Thisis doneusingtheclearwatchdoginstructions.Iftheprogrammalfunctionsforwhateverreason,jumps toanunknownlocation,orentersanendlessloop,theseclearinstructionswillnotbeexecutedin thecorrectmanner,inwhichcasetheWatchdogTimerwilloverflowandresetthedevice.Some oftheWatchdogTimeroptions,suchasalwaysonselectandclocksourceareselectedusing configurationoptions.WithregardtotheWatchdogTimerenable/disablefunction,therearealsofive bits,WE4~WE0,intheWDTCregistertoofferadditionalenable/disableandresetcontrolofthe WatchdogTimer.IftheWDTconfigurationoptionisdeterminedthattheWDTfunctionisalways enabled,theWE4~WE0bitsstillhaveeffectsontheWDTfunction.WhentheWE4~WE0bits valueisequalto01010Bor10101B,theWDTfunctionisenabled.However,iftheWE4~WE0bits arechangedtoanyothervaluesexcept01010Band10101B,whichiscausedbytheenvironmental noiseorsoftwaresetting,itwillresetthemicrocontrollerafter2~3LIRCclockcycles.IftheWDT configurationoptionisdeterminedthattheWDTfunctioniscontrolledbytheWDTcontrolregister, theWE4~WE0valuescandeterminewhichmodetheWDToperatesin.TheWDTfunctionwillbe disabledwhentheWE4~WE0bitsaresettoavalueof10101B.TheWDTfunctionwillbeenabled iftheWE4~WE0bitsvalueisequalto01010B.IftheWE4~WE0bitsaresettoanyothervaluesby theenvironmentalnoiseorsoftwaresetting,except01010Band10101B,itwillresetthedeviceafter 2~3LIRCclockcycles.Afterpoweronthesebitswillhavethevalueof01010B. WDT Configuration Option WE4 ~ WE0 Bits WDT Function Always Ena�le 01010B o� 10101B Ena�le Any othe� values Reset MCU Cont�olled �y WDT Cont�ol Registe� 10101B Disa�le 01010B Ena�le Any othe� values Reset MCU |
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