Datenblatt-Suchmaschine für elektronische Bauteile |
|
HT48R002 Datenblatt(PDF) 23 Page - Holtek Semiconductor Inc |
|
HT48R002 Datenblatt(HTML) 23 Page - Holtek Semiconductor Inc |
23 / 71 page Rev. 1.11 22 April 11, 2017 Rev. 1.11 23 April 11, 2017 HT48R002/HT48R003 Cost-Effective I/O 8-Bit OTP MCU HT48R002/HT48R003 Cost-Effective I/O 8-Bit OTP MCU Power Down Mode and Wake-up Power Down Mode AlloftheHoltekmicrocontrollershavetheabilitytoenteraPowerDownMode,alsoknownasthe HALTModeorSleepMode.Whenthedevicesenterthismode,thenormaloperatingcurrentwill bereducedtoanextremelylowstandbycurrentlevel.Thisoccursbecausewhenthedevicesenter thePowerDownMode,thesystemoscillatorisstoppedwhichreducesthepowerconsumptionto extremelylowlevels.However,asthedevicesmaintaintheirpresentinternalcondition,theycan bewokenupatalaterstageandcontinuerunning,withoutrequiringafullreset.Thisfeatureis extremelyimportantinapplicationareaswheretheMCUsmusthavetheirpowersupplyconstantly maintainedtokeepthedevicesinaknowncondition. Entering the Power Down Mode ThereisonlyonewayforthedevicetoenterthePowerDownModeandthatistoexecutethe “HALT”instructionintheapplicationprogram.Whenthisinstructionisexecuted,thefollowingwill occur: • Thesystemoscillatorwillstoprunningandtheapplicationprogramwillstopatthe“HALT” instruction. • TheDataMemorycontentsandregisterswillmaintaintheirpresentcondition. • TheWDTwillbeclearedandresumecounting. • TheI/Oportswillmaintaintheirpresentcondition. Inthestatusregister,thePowerDownflag,PDF,willbesetandtheWatchdogtime-outflag,TO, willbecleared. Standby Current Considerations AsthemainreasonforenteringtheSleepModeistokeepthecurrentconsumptionofthe MCUtoaslowavalueaspossible,perhapsonlyintheorderofseveralmicro-amps,thereare otherconsiderationswhichmustalsobetakenintoaccountbythecircuitdesignerifthepower consumptionistobeminimized. SpecialattentionmustbemadetotheI/Opinsonthedevice.Allhigh-impedanceinputpinsmust beconnectedtoeitherafixedhighorlowlevelasanyfloatinginputpinscouldcreateinternal oscillationsandresultinincreasedcurrentconsumption.Caremustalsobetakenwiththeloads, whichareconnectedtoI/Opins,whicharesetasoutputs.Theseshouldbeplacedinaconditionin whichminimumcurrentisdrawnorconnectedonlytoexternalcircuitsthatdonotdrawcurrent, suchasotherCMOSinputs. |
Ähnliche Teilenummer - HT48R002 |
|
Ähnliche Beschreibung - HT48R002 |
|
|
Link URL |
Privatsphäre und Datenschutz |
ALLDATASHEETDE.COM |
War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Linktausch | Hersteller All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |