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HT45F4M датащи(PDF) 45 Page - Holtek Semiconductor Inc

номер детали HT45F4M
подробное описание детали  Lithium Battery Backup Power ASSP MCU
PDF  138 Pages
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производитель  HOLTEK [Holtek Semiconductor Inc]
домашняя страница  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F4M датащи(HTML) 45 Page - Holtek Semiconductor Inc

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Rev. 1.10
44
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Rev. 1.10
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HT45F4M
Lithium Battery Backup Power ASSP MCU
HT45F4M
Lithium Battery Backup Power ASSP MCU
• CTRL Register
Bit
7
6
5
4
3
2
1
0
Name
FSYSON
—
—
—
—
LVRF
LRF
WRF
R/W
R/W
—
—
—
—
R/W
R/W
R/W
POR
0
—
—
—
—
x
0
0
Bit7
FSYSON:fSYSControlinIDLEMode
Describeelsewhere.
Bit6~3
“—”:Unimplemented,readas0
Bit2
LVRF:LVRfunctionresetflag
0:Notoccur
1:Occurred
Thisbitissetto1whenaspecificLowVoltageResetsituationconditionoccurs.This
bitcanonlybeclearedto0bytheapplicationprogram.
Bit1
LRF:LVRControlregistersoftwareresetflag
0:Notoccur
1:Occurred
Thisbitissetto1iftheLVRCregistercontainsanynondefinedLVRvoltageregister
values.Thisineffectactslikeasoftwareresetfunction.Thisbitcanonlybeclearedto
0bytheapplicationprogram.
Bit 0
WRF: WDT Control register software reset flag
Desc�ibe elsewhe�e.
Watchdog Time-out Reset During Normal Operation
TheWatchdogtime-outResetduringnormaloperationisthesameasaLVRresetexceptthatthe
Watchdogtime-outflagTOwillbesetto“1”.
t RS TD + t SST
WD T Ti me -o ut
In te r nal R es et
Note:tRSTDispower-ondelay,typicaltime=16.7ms
WDT Time-out Reset During Normal Operation Timing Chart
Watchdog Time-out Reset During SLEEP or IDLE Mode
TheWatchdogtime-outResetduringSLEEPorIDLEModeisalittledifferentfromotherkindsofreset.
MostoftheconditionsremainunchangedexceptthattheProgramCounterandtheStackPointerwillbe
clearedto“0”andtheTOflagwillbesetto“1”.RefertotheA.C.CharacteristicsfortSSTdetails.
t SST
WD T Ti me -o ut
In te r nal R es et
Note:ThetSSTis15~16clockcyclesifthesystemclocksourceisprovidedbytheHIRC.ThetSSTis
1~2clockfortheLIRC.
WDT Time-out Reset During SLEEP or IDLE Timing Chart



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