HT45F3W datasheet(67/167 Pages) HOLTEK

67 / 167 page

Rev. 1.50

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Rev. 1.50

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HT45F3W

R-Type Blood Pressure Meter Flash MCU

HT45F3W

R-Type Blood Pressure Meter Flash MCU

Watchdog Time-out Reset during SLEEP or IDLE Mode

TheWatchdogtime-outResetduringSLEEPorIDLEModeisalittledifferentfromotherkinds

ofreset.MostoftheconditionsremainunchangedexceptthattheProgramCounterandtheStack

Pointerwillbeclearedto"0"andtheTOflagwillbesetto"1".RefertotheA.C.Characteristicsfor

tSSTdetails.

t SST

WD T Ti me - out

In te r nal R es et

WDT Time-out Reset during Sleep or IDLE Mode Timing Chart

Reset Initial Conditions

Thedifferenttypesofresetdescribedaffecttheresetflagsindifferentways.Theseflags,known

asPDFandTOarelocatedinthestatusregisterandarecontrolledbyvariousmicrocontroller

operations,suchastheSLEEPorIDLEModefunctionorWatchdogTimer.Theresetflagsare

showninthetable:

PDF

Reset Conditions

Powe�-on �eset

LVR �eset du�ing No��al o� SLOW Mode ope�ation

WDT ti�e-out �eset du�ing No��al 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

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

HT45F3W 데이터시트(PDF) 67 Page - Holtek Semiconductor Inc

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