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HT45R4U датащи(PDF) 70 Page - Holtek Semiconductor Inc

номер детали HT45R4U
подробное описание детали  TinyPowerTM A/D Type e-Banking ASSP OTP MCU with LCD
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производитель  HOLTEK [Holtek Semiconductor Inc]
домашняя страница  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45R4U датащи(HTML) 70 Page - Holtek Semiconductor Inc

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Rev. 1.10
70
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Rev. 1.10
71
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HT45R4U
TinyPowerTM A/D Type
e-Banking ASSP OTP MCU with LCD
Watchdog Time-out Reset during Power Down
TheWatchdogtime-outResetduringPowerDownisalittledifferentfromotherkindsofreset.Most
oftheconditionsremainunchangedexceptthattheProgramCounterandtheStackPointerwillbe
clearedto″0″andtheTOflagwillbesetto″1″.RefertotheA.C.CharacteristicsfortSSTdetails.
WD T Ti me - out
SS T Ti me - out
t SST
WDT Time-out Reset during Power Down Timing Chart
Reset Initial Conditions
Thedifferenttypesofresetdescribedaffecttheresetflagsindifferentways.Theseflags,knownas
PDFandTOarelocatedinthestatusregisterandarecontrolledbyvariousmicrocontrolleroperations,
suchasthePowerDownfunctionorWatchdogTimer.Theresetflagsareshowninthetable:
TO
PDF
RESET Conditions
0
0
RES �eset du�ing powe�-on
u
u
RES o� LVR �eset du�ing no�mal ope�ation
1
u
WDT time-out �eset du�ing no�mal ope�ation
1
1
WDT time-out �eset du�ing Powe� Down
Note:″u″standsforunchanged
Thefollowingtableindicatesthewayinwhichthevariouscomponentsofthemicrocontrollerare
affectedafterapower-onresetoccurs.
Item
Condition After RESET
P�og�am Counte�
Reset to ze�o
Inte��upts
All inte��upts will be disabled
WDT
Clea� afte� �eset� WDT begins �ounting
Time�/Event Counte�
Time� Counte� will be tu�ned off
P�es�ale�
T�e Time� Counte� P�es�ale� will be �lea�ed
Input/Output Po�ts
I/O po�ts will be setup as inputs
Sta�k Pointe�
Sta�k Pointe� will point to t�e top of t�e sta�k
Thedifferentkindsofresetsallaffecttheinternalregistersofthemicrocontrollerindifferentways.
Toensurereliablecontinuationofnormalprogramexecutionafteraresetoccurs,itisimportantto
knowwhatconditionthemicrocontrollerisinafteraparticularresetoccurs.Thefollowingtable
describeshoweachtypeofresetaffectseachofthemicrocontrollerinternalregisters.Notethatwhere
morethanonepackagetypeexiststhetablewillreflectthesituationforthelargerpackagetype.
Register
Reset
(Power-On)
RES Reset
(Normal Oper.)
WDT Time-out
(Normal Oper.)
WDT Time-out
(HALT)*
�P0
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
�P1
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
BP
--0- 0000
--0- 0000
--0- 0000
--u- uuuu
ACC
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
PCL
0000 0000
0000 0000
0000 0000
uuuu uuuu
TBLP
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
TBLH
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
TBHP
--xx xxxx
--uu uuuu
--uu uuuu
--uu uuuu
STATUS
--00 xxxx
--uu uuuu
--1u uuuu
--1 1 uuuu
INTC0
-000 0000
-000 0000
-000 0000
-uuu uuuu
LVDC
--00 -000
--00 -000
--00 -000
--uu -uuu


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