HT66F005 datasheet(49/109 Pages) HOLTEK

49 / 109 page

Rev. 1.30

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Rev. 1.30

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HT66F005/HT66F006

Cost-Effective A/D Flash MCU with EEPROM

HT66F005/HT66F006

Cost-Effective A/D Flash MCU with EEPROM

Reset Initial Conditions

Thedifferenttypesofresetdescribedaffecttheresetflagsindifferentways.Theseflags,known

asPDFandTOarelocatedinthestatusregisterandarecontrolledbyvariousmicrocontroller

operations,suchastheSLEEPorIDLEModefunctionorWatchdogTimer.Theresetflagsare

showninthetable:

PDF

RESET Conditions

Powe�-on �eset

LVR �eset du�ing NORM�L o� SLOW Mode o�e�ation

WDT time-out �eset du�ing NORM�L o� SLOW Mode o�e�ation

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

“u” stands fo� unchanged

Thefollowingtableindicatesthewayinwhichthevariouscomponentsofthemicrocontrollerare

affectedafterapower-onresetoccurs.

Item

Condition After RESET

P�og�am Counte�

Reset to ze�o

Inte��u�ts

�� inte��u�ts wi�� be disab�ed

WDT

C�ea� afte� �eset� WDT begins counting

Time� Modu�es

Time� Counte� wi�� be tu�ned off

In�ut/Out�ut Po�ts

I/O �o�ts wi�� be setu� as in�uts� and �N0~�N3 as �/D in�ut �ins

Stack Pointe�

Stack Pointe� wi�� oint to the to� of the stack

Thedifferentkindsofresetsallaffecttheinternalregistersofthemicrocontrollerindifferentways.

Toensurereliablecontinuationofnormalprogramexecutionafteraresetoccurs,itisimportantto

knowwhatconditionthemicrocontrollerisinafteraparticularresetoccurs.Thefollowingtable

describeshoweachtypeofresetaffectseachofthemicrocontrollerinternalregisters.Notethatwhere

morethanonepackagetypeexiststhetablewillreflectthesituationforthelargerpackagetype.

HT66F005 датащи(PDF) 49 Page - Holtek Semiconductor Inc