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HT45F12 датащи(PDF) 49 Page - Holtek Semiconductor Inc

номер детали HT45F12
подробное описание детали  8-Bit Flash MCU with Op Amps & Comparators
PDF  104 Pages
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производитель  HOLTEK [Holtek Semiconductor Inc]
домашняя страница  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F12 датащи(HTML) 49 Page - Holtek Semiconductor Inc

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48
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HT45F12
8-Bit Flash MCU with Op Amps & Comparators
HT45F12
8-Bit Flash MCU with Op Amps & Comparators
LV R
In te r nal R es et
t RS TD + t SST
Note:tRSTDispower-ondelay,typicaltime=16.7ms
Low Voltage Reset Timing Chart
• LVRC Register
Bit
7
6
5
4
3
2
1
0
Na�e
LV�7
LV��
LV�5
LV�4
LV�3
LV��
LV�1
LV�0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
0
1
0
1
0
1
0
1
Bit7~0
LVS7 ~ LVS0:LVRvoltageselect
01010101:2.1V(default)
00110011:2.55V
10011001:3.15V
10101010:3.8V
Othervalues:GeneratesMCUreset–registerisresettoPORvalue
Whenanactuallowvoltageconditionoccurs,asspecifiedbyoneofthefourdefined
LVRvoltagevaluesabove,anMCUresetwillbegenerated.Theresetoperationwill
beactivatedafter2~3LIRCclockcycles.Inthissituationtheregistercontentswill
remainthesameaftersucharesetoccurs.
Anyregistervalue,otherthanthefourdefinedregistervaluesabove,willalsoresultin
thegenerationofanMCUreset.Theresetoperationwillbeactivatedafter2~3LIRC
clockcycles.HoweverinthissituationtheregistercontentswillberesettothePOR
value.
• CTRL Register
Bit
7
6
5
4
3
2
1
0
Na�e
F�Y�ON
—
—
—
—
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,readas“0”
Bit2
LVRF:LVRfunctionresetflag
0:Notoccurred
1:Occurred
Thisbitissetto1whenaspecificLowVoltageResetsituationconditionoccurs.This
bitcanonlybeclearedto0bytheapplicationprogram.
Bit1
LRF:LVRControlregistersoftwareresetflag
0:Notoccurred
1:Occurred
Thisbitissetto1iftheLVRCregistercontainsanynondefinedLVRvoltageregister
values.Thisineffectactslikeasoftwareresetfunction.Thisbitcanonlybeclearedto
0bytheapplicationprogram.
Bit0
WRF:WDTControlregistersoftwareresetflag
Describeelsewhere.



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