HT68F14 HOLTEK [Holtek Semiconductor Inc], HT68F14 Datasheet - Page 53

• Manufacturer Part Number: HT68F14
• Description: Enhanced I/O Flash Type MCU
• Manufacturer: HOLTEK [Holtek Semiconductor Inc]

HT68F13/HT68F14/HT68F15
Enhanced I/O Flash Type MCU
Rev. 1.10
Bit 7~0
Bit 7~0
Bit 7~2
Bit 1~0
Bit 7~4
Bit 3~0
Pull-high Resistors
Name
Name
Name
Name
POR
POR
POR
POR
R/W
R/W
R/W
R/W
Bit
Bit
Bit
Bit
PAPU Register
PBPU Register
PCPU Register - HT68F13
PCPU Register - HT68F14
Many product applications require pull-high resistors for their switch inputs usually requiring the use
of an external resistor. 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~PDPU and are implemented using weak PMOS
transistors.
I/O Port A bit 7 ~ bit 0 pull-high control
I/O Port B bit 7 ~ bit 0 pull-high control
²¾² Unimplemented, read as ²0²
I/O Port C bit 1 ~ bit 0 pull-high control
²¾² Unimplemented, read as ²0²
I/O Port C bit 3 ~ bit 0 pull-high control
R/W
R/W
0: disable
1: enable
0: disable
1: enable
0: disable
1: enable
0: disable
1: enable
D7
D7
¾
¾
¾
¾
¾
¾
7
0
7
0
7
7
R/W
R/W
D6
D6
¾
¾
¾
¾
¾
¾
6
0
6
0
6
6
R/W
R/W
D5
D5
¾
¾
¾
¾
¾
¾
5
0
5
0
5
5
53
R/W
R/W
D4
D4
¾
¾
¾
¾
¾
¾
4
0
4
0
4
4
R/W
R/W
R/W
D3
D3
D3
¾
¾
¾
3
0
3
0
3
3
0
R/W
R/W
R/W
D2
D2
D2
¾
¾
¾
2
0
2
0
2
2
0
R/W
R/W
R/W
R/W
D1
D1
D1
D1
1
0
1
0
1
0
1
0
February 9, 2011
R/W
R/W
R/W
R/W
D0
D0
D0
D0
0
0
0
0
0
0
0
0