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HT46R0042 Fiches technique(PDF) 29 Page - Holtek Semiconductor Inc

No de pièce HT46R0042
Description  Cost-Effective A/D 8-Bit OTP MCU
Download  83 Pages
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Fabricant  HOLTEK [Holtek Semiconductor Inc]
Site Internet  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT46R0042 Fiches technique(HTML) 29 Page - Holtek Semiconductor Inc

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Rev. 1.00
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HT46R0042
Cost-Effective A/D 8-Bit OTP MCU
HT46R0042
Cost-Effective A/D 8-Bit OTP MCU
Reset Initial Conditions
Thedifferenttypesofresetdescribedaffecttheresetflagsindifferentways.Theseflags,known
asPDFandTOarelocatedinthestatusregisterandarecontrolledbyvariousmicrocontroller
operations,suchastheSleepModefunctionorWatchdogTimer.Theresetflagsareshowninthe
table:
TO
PDF
RESET Conditions
0
0
Powe�-on �eset
u
u
RES o� LVR �eset du�ing N�RMAL Mode ope�ation
1
u
WDT time-out �eset du�ing N�RMAL Mode ope�ation
1
1
WDT time-out �eset du�ing Sleep Mode ope�ation
Note: “u” stands fo� un�hanged
Thefollowingtableindicatesthewayinwhichthevariouscomponentsofthemicrocontrollerare
affectedafterapower-onresetoccurs.
Item
Condition After RESET
P�og�am Counte�
Reset to ze�o
Inte��upts
All inte��upts will �e disa�led
WDT
Clea� afte� �eset� WDT �egins �ounting
Time�/Event Counte�
Time� Counte� will �e tu�ned off
P�e�ale�
The Time� Counte� P�es�ale� will �e �lea�ed
Input/�utput Po�ts
I/� po�ts will �e set as inputs
Sta�k Pointe�
Sta�k Pointe� will point to the top of the sta�k
Thedifferentkindsofresetsallaffecttheinternalregistersofthemicrocontrollerindifferentways.
Toensurereliablecontinuationofnormalprogramexecutionafteraresetoccurs,itisimportantto
knowwhatconditionthemicrocontrollerisinafteraparticularresetoccurs.Thefollowingtable
describeshoweachtypeofresetaffectsthemicrocontrollerinternalregisters.
Register
Reset
(Power On)
RES Reset
(Normal Operation)
RES Reset
(HALT)
WDT Time-out
(Normal Operation)
WDT Time-out
(HALT)
P�og�am Counte�
000H
000H
000H
000H
000H
IAR0
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
MP0
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
IAR1
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
MP1
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
ACC
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
PCL
0000 0000
0000 0000
0000 0000
0000 0000
uuuu uuuu
TBLP
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
TBLH
-xxx xxxx
-uuu uuuu
-uuu uuuu
-uuu uuuu
-uuu uuuu
WDTS
---- -1 1 1
---- -1 1 1
---- -1 1 1
---- -1 1 1
---- -uuu
STATUS
--00 xxxx
--uu uuuu
--01 uuuu
--1u uuuu
--1 1 uuuu
INTC0
-000 0000
-000 0000
-000 0000
-000 0000
-uuu uuuu
TMR
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
uuuu uuuu
TMRC
00-0 1000
00-0 1000
00-0 1000
00-0 1000
uu-u uuuu
PA
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
PAC
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
PAWU
0000 0000
0000 0000
0000 0000
0000 0000
uuuu uuuu
PAPU
0000 0000
0000 0000
0000 0000
0000 0000
uuuu uuuu
PB
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
PBC
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu


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