HT45F5R datasheet(51/138 Pages) HOLTEK

51 / 138 page

Rev. 1.10

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Rev. 1.10

De�e��e� 1�� 01�

HT45F5R

Charger ASSP Flash MCU

HT45F5R

Charger ASSP Flash MCU

Reset Initial Conditions

Thedifferenttypesofresetdescribedaffecttheresetflagsindifferentways.Theseflags,known

asPDFandTOarelocatedinthestatusregisterandarecontrolledbyvariousmicrocontroller

operations,suchastheSLEEPorIDLEModefunctionorWatchdogTimer.Theresetflagsare

showninthetable.

PDF

Reset Conditions

Powe�-on �eset

LVR �eset du�ing NORMAL o� SLOW Mode ope�ation

WDT ti�e-out �eset du�ing NORMAL o� SLOW Mode ope�ation

WDT ti�e-out �eset du�ing IDLE o� SLEEP Mode ope�ation

Note:"u"standsforunchanged

Thefollowingtableindicatesthewayinwhichthevariouscomponentsofthemicrocontrollerare

affectedafterapower-onresetoccurs.

Item

Condition After RESET

P�og�a� Counte�

Reset to ze�o

Inte��upts

All inte��upts will �e disa�led

WDT

Clea� afte� �eset� WDT �egins �ounting

Ti�e� Modules

Ti�e� Modules will �e tu�ned off

Input/Output Po�ts

I/O po�ts will �e setup as inputs

Sta�k Pointe�

Sta�k Pointe� will point to the top of the sta�k

Thedifferentkindsofresetsallaffecttheinternalregistersofthemicrocontrollerindifferentways.

Toensurereliablecontinuationofnormalprogramexecutionafteraresetoccurs,itisimportantto

knowwhatconditionthemicrocontrollerisinafteraparticularresetoccurs.Thefollowingtable

describeshoweachtypeofresetaffectseachofthemicrocontrollerinternalregisters.Notethatwhere

morethanonepackagetypeexiststhetablewillreflectthesituationforthelargerpackagetype.

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