HT66F4530 datasheet(70/224 Pages) HOLTEK

70 / 224 page

Rev. 1.00

De�e��e� �1� �01�

Rev. 1.00

De�e��e� �1� �01�

HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

HT66F4530/HT66F4540/HT66F4550

A/D Flash MCU with Dual Operational Amplifiers

Watchdog Time-out Reset during Normal Operation

TheWatchdogtime-outResetduringnormaloperationintheFASTorSLOWmodeisthesameasa

hardwareRESpinresetexceptthattheWatchdogtime-outflagTOwillbesetto"1".

WDT Ti�e-out

Inte�nal Reset

tRSTD + tSST

WDT Time-out Reset during Normal Operation Timing Chart

Watchdog Time-out Reset during SLEEP or IDLE Mode

TheWatchdogtime-outResetduringSLEEPorIDLEModeisalittledifferentfromotherkinds

ofreset.MostoftheconditionsremainunchangedexceptthattheProgramCounterandtheStack

Pointerwillbeclearedto"0"andtheTOflagwillbesetto"1".RefertotheSystemStartUpTime

CharacteristicsfortSSTdetails.

WDT Ti�e-out

Inte�nal Reset

tSST

WDT Time-out Reset during SLEEP or IDLE Timing Chart

Reset Initial Conditions

Thedifferenttypesofresetdescribedaffecttheresetflagsindifferentways.Theseflags,known

asPDFandTOarelocatedinthestatusregisterandarecontrolledbyvariousmicrocontroller

operations,suchastheSLEEPorIDLEModefunctionorWatchdogTimer.Theresetflagsare

showninthetable:

PDF

RESET Conditions

Powe�-on �eset

RES o� LVR �eset du�ing FAST o� SLOW Mode ope�ation

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

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

"u" stands fo� un�hanged

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� Ti�e Bases

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.Notethat

wheremorethanonepackagetypeexiststhetablewillreflectthesituationforthelargerpackage

type.

HT66F4530 Datasheet(PDF) 70 Page - Holtek Semiconductor Inc

HT66F4530 Datasheet(HTML) 70 Page - Holtek Semiconductor Inc

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