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HT45R2K-C Scheda tecnica(PDF) 38 Page - Holtek Semiconductor Inc |
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HT45R2K-C Scheda tecnica(HTML) 38 Page - Holtek Semiconductor Inc |
38 / 105 page Rev. 1.40 38 �a��� 1�� �01� Rev. 1.40 39 �a��� 1�� �01� HT45R2K-C/-B/-A Dual Slope 16K/8K/4K ASSP MCU for Body Fat Scale HT45R2K-C/-B/-A Dual Slope 16K/8K/4K ASSP MCU for Body Fat Scale • LVRC Register Bit 7 6 5 4 3 2 1 0 Name LVS7 LVS6 LVS� LVS4 LVS3 LVS� LVS1 LVS0 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 1 0 1 0 1 0 1 Bit7~0 LVS7 ~ LVS0:LVRvoltageselect 01010101:2.1V(default) 00110011:2.55V 10011001:3.15V 10101010:3.8V Othervalues:GeneratesMCUreset–registerisresettoPORvalue Whenanactuallowvoltageconditionoccurs,asspecifiedbyoneofthefourdefined LVRvoltagevaluesabove,anMCUresetwillbegenerated.Theresetoperationwill beactivatedafter2~3LIRCclockcycles.Inthissituationtheregistercontentswill remainthesameaftersucharesetoccurs. Anyregistervalue,otherthanthefourdefinedregistervaluesabove,willalsoresultin thegenerationofanMCUreset.Theresetoperationwillbeactivatedafter2~3LIRC clockcycles.HoweverinthissituationtheregistercontentswillberesettothePOR value. Watchdog Time-out Reset during Normal Operation TheWatchdogtime-outResetduringnormaloperationisthesameasahardwareRESpinreset exceptthattheWatchdogtime-outflagTOwillbesetto“1”. WD T Ti me - out In te r nal R es et t RS TD + t SS T Note:tRSTDispower-ondelay,typicaltime=100ms WDT Time-out Reset during Normal Operation Timing Chart Watchdog Time-out Reset during Power Down mode TheWatchdogtime-outResetduringpowerdownmodeisalittledifferentfromotherkindsofreset. MostoftheconditionsremainunchangedexceptthattheProgramCounterandtheStackPointer willbeclearedto“0”andtheTOflagwillbesetto“1”.RefertotheA.C.CharacteristicsfortSST details. WD T Ti me - out In te r nal R es et t SS T Note:ThetSSTcanbechosentobeeither1024or2clockcyclesviaconfigurationoptionifthe systemclocksourceisprovidedbyERCorHIRC.TheSSTis1024forHXTorLXT. WDT Time-out Reset during Power down Timing Chart Reset Initial Conditions Thedifferenttypesofresetdescribedaffecttheresetflagsindifferentways.Theseflags,knownasPDF andTOarelocatedinthestatusregisterandarecontrolledbyvariousmicrocontrolleroperations,such asthePowerdownfunctionorWatchdogTimer.Theresetflagsareshowninthetable. |
Codice articolo simile - HT45R2K-C_15 |
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Descrizione simile - HT45R2K-C_15 |
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