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HT66F302 Datasheet(PDF) 53 Page - Holtek Semiconductor Inc

Part # HT66F302
Description  Cost-Effective Flash MCU with EEPROM
PDF  129 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT66F302 Datasheet(HTML) 53 Page - Holtek Semiconductor Inc

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Rev. 1.11
52
April 11, 2017
Rev. 1.11
53
April 11, 2017
HT66F302/HT66F303
Cost-Effective Flash MCU with EEPROM
HT66F302/HT66F303
Cost-Effective Flash MCU with EEPROM
Pull-high Resistors
Manyproductapplicationsrequirepull-highresistorsfortheirswitchinputsusuallyrequiringthe
useofanexternalresistor.Toeliminatetheneedfortheseexternalresistors,allI/Opins,when
configuredasaninputhavethecapabilityofbeingconnectedtoaninternalpull-highresistor.These
pull-highresistorsareselectedusingregisterLVPUCandPAPU~PBPU,andareimplementedusing
weakPMOStransistors.
Notethatthepull-highresistorcanbecontrolledbytherelevantpull-highcontrolregisteronly
whenthepin-sharedfunctionalpinisselectedasaninputorNMOSoutput.Otherwise,thepull-high
resistorscannotbeenabled.
LVPUC Register
Bit
7
6
5
4
3
2
1
0
Name
—
—
—
—
LVPU
—
—
—
R/W
—
—
—
—
R/W
—
—
—
POR
—
—
—
—
0
—
—
—
Bit7~4
Unimplemented,readas“0”
Bit3
LVPU:LowVoltagePull-HighresistorControl
0:allpinpullhighresistoris30kΩ@5V
1:allpinpullhighresistoris7.5kΩ(10kΩ//30kΩ)@5V
Bit2~0
Unimplemented,readas“0”
PAPU Register
Bit
7
6
5
4
3
2
1
0
Name
PAPU7
PAPU6
PAPU5
PAPU4
PAPU3
PAPU2
PAPU1
PAPU0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
0
0
0
0
0
0
0
0
Bit7~0
I/OPortAbit7~bit0Pull-HighControl
0:Disable
1:Enable
PBPU Register – HT66F303
Bit
7
6
5
4
3
2
1
0
Name
—
—
PBPU5
PBPU4
PBPU3
PBPU2
PBPU1
PBPU0
R/W
—
—
R/W
R/W
R/W
R/W
R/W
R/W
POR
—
—
0
0
0
0
0
0
Bit7~6
Unimplemented,readas“0”
Bit5~0
I/OPortBbit5~bit0Pull-HighControl
0:Disable
1:Enable



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