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(d) Pull-up resistor option register CT (PUCT)
This is an 8-bit register used to set whether to use an on-chip pull-up resistor.
This register can be read and written in 8-bit or 1-bit units.
Symbol
PUCT
R/W
(e) Pull-down resistor option register CT (PDCT)
This is an 8-bit register used to set whether to use an on-chip pull-down resistor.
This register can be read and written in 8-bit or 1-bit units.
Symbol
PDCT
R/W
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Chapter 4 Port Functions
Figure 4-64: Pull-up Resistor Option Register CT (PUCT) Format
7
6
5
4
0
PUCT6
0
PUCT4
R/W
R/W
R/W
R/W
PUCTn
Connection of a pull-up resistor control (n = 0, 1, 4, 6)
0
Not connected
1
Connected
Figure 4-65: Pull-down Resistor Option Register CT (PDCT) Format
7
6
5
4
0
PDCT6
0
PDCT4
R/W
R/W
R/W
R/W
PDCTn
Connection of a pull-down resistor control (n = 0, 1, 4, 6)
0
Not connected
1
Connected
User's Manual U16702EE3V2UD00
3
2
1
0
0
PUCT1
PUCT0 FFFFFA4AH
R/W
R/W
R/W
R/W
3
2
1
0
0
PDCT1
PDCT0 FFFFFA6AH
R/W
R/W
R/W
R/W
0
Address
After reset
00H
0
Address
After reset
00H
165
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