поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

HT46R003B датащи(PDF) 25 Page - Holtek Semiconductor Inc

номер детали HT46R003B
подробное описание детали  Cost-Effective A/D 8-bit OTP MCU
Download  76 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  HOLTEK [Holtek Semiconductor Inc]
домашняя страница  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT46R003B датащи(HTML) 25 Page - Holtek Semiconductor Inc

Back Button HT46R003B Datasheet HTML 21Page - Holtek Semiconductor Inc HT46R003B Datasheet HTML 22Page - Holtek Semiconductor Inc HT46R003B Datasheet HTML 23Page - Holtek Semiconductor Inc HT46R003B Datasheet HTML 24Page - Holtek Semiconductor Inc HT46R003B Datasheet HTML 25Page - Holtek Semiconductor Inc HT46R003B Datasheet HTML 26Page - Holtek Semiconductor Inc HT46R003B Datasheet HTML 27Page - Holtek Semiconductor Inc HT46R003B Datasheet HTML 28Page - Holtek Semiconductor Inc HT46R003B Datasheet HTML 29Page - Holtek Semiconductor Inc Next Button
Zoom Inzoom in Zoom Outzoom out
 25 / 76 page
background image
Rev. 1.00
��
��ne 1�� �01�
Rev. 1.00
�5
��ne 1�� �01�
HT46R003B
Cost-Effective A/D 8-bit OTP MCU
HT46R003B
Cost-Effective A/D 8-bit OTP MCU
Watchdog Timer Operation
TheWatchdogTimeroperatesbyprovidingadeviceresetwhenitstimeroverflows.Thismeans
thatintheapplicationprogramandduringnormaloperationtheuserhastostrategicallyclearthe
WatchdogTimerbeforeitoverflowstopreventtheWatchdogTimerfromexecutingareset.Thisis
doneusingtheclearwatchdoginstruction.NotethatiftheWatchdogTimerfunctionisnotenabled,
thenanyinstructionrelatedtotheWatchdogTimerwillresultinnooperation.
SettingthevariousWatchdogTimeroptionsarecontrolledviatheinternalregistersWDTCand
WDTS.EnablingtheWatchdogTimercanbecontrolledbytheWDTENnbitsintheinternalWDTC
registerintheDataMemory.TheWatchdogTimerwillbedisabledifbitsWDTEN5~WDTEN0in
theWDTCregisterarewrittenwiththebinaryvalue101101BwhiletheWDTTimerwillbeenabled
ifthesebitsarewrittenwiththebinaryvalue000000B.Ifthesebitsarewrittenwiththeothervalues
except000000Band101101B,theMCUwillbereset.
TheWatchdogTimer clock can emanate from three different sources, selected by the
WDTCLS1~WDTCLS0bitsintheWDTCregister.ThesesourcesarefSYS,fSYS/4orLIRC.Itis
importanttonotethatwhenthesystementerstheSleepModethesystemclockisstopped,therefore
ifithasselectedfSYSorfSYS/4astheWatchdogTimerclocksource,theWatchdogTimerwillstop.
Forsystemsthatoperateinnoisyenvironments,it’srecommendedtousetheLIRCastheclock
source.Thedivisionratiooftheprescalerisdeterminedbybits0,1and2oftheWDTSregister,
knownasWS0,WS1andWS2.IftheWatchdogTimerinternalclocksourceisselectedandwith
theWS0,WS1andWS2bitsoftheWDTSregisterallsethigh,theprescalerdivisionratiowillbe
1:32768,whichwillgiveamaximumtime-outperiod.
Undernormalprogramoperation,aWatchdogTimertime-outwillinitializeadeviceresetandset
thestatusbitTO.However,ifthesystemisintheSleepMode,whenaWatchdogTimertime-out
occurs,thedevicewillbewokenup,theTObitinthestatusregisterwillbesetandonlytheProgram
CounterandStackPointerwillbereset.Fourmethodscanbeadoptedtoclearthecontentsofthe
WatchdogTimer.ThefirstisaWDTsoftwarereset,whichmeansacertainvalueexcept000000B
and101101BwrittenintotheWDTEN5~WDTEN0bitfiled,thesecondisanexternalhardware
reset,whichmeansalowlevelontheexternalresetpin,thethirdisusingtheClearWatchdogTimer
softwareinstructionsandthefourthisviaa“HALT”instruction.
ThereisonlyonemethodofusingsoftwareinstructiontocleartheWatchdogTimer.Thatistouse
the“CLRWDT”instructiontocleartheWDT.
CLR WDT”Instruction
8-stage Divider
WDT Prescaler
WDTEN5~WDTEN0 bits
WDTC
Register
Reset MCU
S/W
Control
fS
fS/28
8-to-1 MUX
CLR
WS2~WS0
(fS/28 ~ fS/215)
WDT Time-out
(28/fS ~ 215/fS)
fSYS/4
fSYS
fLIRC
WDTCLS1~WDTCLS0
RES pin reset
HALT”Instruction
Watchdog Timer


Аналогичный номер детали - HT46R003B

производительномер деталидатащиподробное описание детали
logo
Holtek Semiconductor In...
HT46R003 HOLTEK-HT46R003 Datasheet
5Mb / 83P
   Cost-Effective A/D 8-Bit OTP MCU
More results

Аналогичное описание - HT46R003B

производительномер деталидатащиподробное описание детали
logo
Holtek Semiconductor In...
HT46R0042 HOLTEK-HT46R0042 Datasheet
5Mb / 83P
   Cost-Effective A/D 8-Bit OTP MCU
HT46R002 HOLTEK-HT46R002 Datasheet
5Mb / 83P
   Cost-Effective A/D 8-Bit OTP MCU
HT46R004 HOLTEK-HT46R004 Datasheet
5Mb / 84P
   Cost-Effective A/D 8-Bit OTP MCU
HT46R46-H HOLTEK-HT46R46-H Datasheet
292Kb / 42P
   Cost-Effective A/D Type 8-Bit OTP MCU
HT46R48 HOLTEK-HT46R48 Datasheet
292Kb / 42P
   Cost-Effective A/D Type 8-Bit OTP MCU
HT46R47-H HOLTEK-HT46R47-H Datasheet
293Kb / 42P
   Cost-Effective A/D Type 8-Bit OTP MCU
HT46R48E HOLTEK-HT46R48E Datasheet
339Kb / 46P
   Cost-Effective A/D Type 8-Bit OTP MCU
HT48R002 HOLTEK-HT48R002 Datasheet
5Mb / 71P
   Cost-Effective I/O 8-Bit OTP MCU
HT46R46E HOLTEK-HT46R46E Datasheet
318Kb / 45P
   Cost-Effective A/D Type 8-Bit MCU
HT46R4A HOLTEK-HT46R4A Datasheet
468Kb / 60P
   Cost-Effective A/D Type 8-Bit MCU
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76


датащи скачать

Go To PDF Page


ссылки URL




Конфиденциальность
ALLDATASHEETRU.COM
Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   обмен ссыками   |   поиск по производителю
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com