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HT66F20 датащи(PDF) 64 Page - Holtek Semiconductor Inc

номер детали HT66F20
подробное описание детали  Enhanced A/D Flash Type MCU 8-Bit MCU with EEPROM
PDF  250 Pages
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производитель  HOLTEK [Holtek Semiconductor Inc]
домашняя страница  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT66F20 датащи(HTML) 64 Page - Holtek Semiconductor Inc

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HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
Rev. 1.20
64
June 4, 2010
Pull-high Resistors
Many product applications require pull-high resistors for their switch inputs usually requiring the use of an external re-
sistor. To eliminate the need for these external resistors, all I/O pins, when configured as an input have the capability of
being connected to an internal pull-high resistor. These pull-high resistors are selected using registers PAPU~PGPU,
and are implemented using weak PMOS transistors.
· PAPU Register
Bit
76543210
Name
D7
D6
D5
D4
D3
D2
D1
D0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
00000000
· PBPU Register
¨ HT66F40/HT66F50/HT66F60
Bit
76543210
Name
D7
D6
D5
D4
D3
D2
D1
D0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
00000000
· PCPU Register
¨ HT66F30/HT66F40/HT66F50/HT66F60
Bit
76543210
Name
D7
D6
D5
D4
D3
D2
D1
D0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
00000000
· PDPU Register
¨ HT66F40/HT66F50/HT66F60
Bit
76543210
Name
D7
D6
D5
D4
D3
D2
D1
D0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
00000000
· PEPU Register
¨ HT66F40/HT66F50/HT66F60
Bit
76543210
Name
D7
D6
D5
D4
D3
D2
D1
D0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
00000000



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