HT69F340 datasheet(80/235 Pages) HOLTEK

80 / 235 page

Rev. 1.30

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Rev. 1.30

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HT69F340/HT69F350/HT69F360

TinyPowerTM I/O Flash MCU with LCD & EEPROM

HT69F340/HT69F350/HT69F360

TinyPowerTM I/O Flash MCU with LCD & EEPROM

Reset Initial Conditions

Thedifferenttypesofresetdescribedaffecttheresetflagsindifferentways.Theseflags,known

asPDFandTOarelocatedinthestatusregisterandarecontrolledbyvariousmicrocontroller

operations,suchastheSLEEPorIDLEModefunctionorWatchdogTimer.Theresetflagsare

showninthetable:

PDF

RESET Conditions

Powe�-on �eset

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

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

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

�ote: “u” stands fo� unchanged

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 counting

Ti�e� Modules

Ti�e� Modules will �e tu�ned off

Input/Output Po�ts

I/O po�ts will �e setup as inputs

Stack Pointe�

Stack Pointe� will point to the top of the stack

Thedifferentkindsofresetsallaffecttheinternalregistersofthemicrocontrollerindifferentways.

Toensurereliablecontinuationofnormalprogramexecutionafteraresetoccurs,itisimportantto

knowwhatconditionthemicrocontrollerisinafteraparticularresetoccurs.Thefollowingtable

describeshoweachtypeofresetaffectsthemicrocontrollerinternalregisters.Notethatwheremore

thanonepackagetypeexiststhetablewillreflectthesituationforthelargerpackagetype.

HT69F340

Power-On

Reset

RES or LVR Reset

(Normal Operation)

RESReset

(HALT)

WDT Time-out

(Normal Operation)

WDT Time-out

(HALT)

IAR0

xxxx xxxx

uuuu uuuu

MP0

xxxx xxxx

uuuu uuuu

IAR1

xxxx xxxx

uuuu uuuu

MP1L

0000 0000

uuuu uuuu

MP1H

0000 0000

uuuu uuuu

ACC

xxxx xxxx

uuuu uuuu

PCL

0000 0000

TBLP

xxxx xxxx

uuuu uuuu

TBLH

xxxx xxxx

uuuu uuuu

TBHP

---- xxxx

---- uuuu

STATUS

xx00 xxxx

uuuu uuuu

uu01 uuuu

xx1u uuuu

u u11 uu u u

IAR�

xxxx xxxx

uuuu uuuu

MP�L

0000 0000

uuuu uuuu

MP�H

0000 0000

uuuu uuuu

TBC

001 1 -1 1 1

uuuu -uuu

I�TC0

-000 0000

-uuu uuuu

I�TC1

0000 0000

uuuu uuuu

SMOD1

---- -x00

---- -uuu

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