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CHAPTER 4 I/O PORTS
● Port 7 pull-up setting register (PUL7)
The bits of the pull-up setting register correspond to the pins of port 7 in one-to-one correspondence.
When the pull-up resistor is selected by using the pull-up setting register, the pin will be at "H" level
(pull-up state) instead of Hi-Z during stop (SPL = 1). During a reset, however, the pull-up is invalid and
the pin remains at Hi-Z.
Figure 4.7-2 shows the pull-up resistor settings assigned to the values of the bits of the port 7 pull-up
register.
Figure 4.7-2 Pull-up Resistor Settings (PUL7)
PUL72 PUL71
PUL70
0
1
bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
0065
H
-
-
-
- - PUL72 PUL71 PUL70
-----000
B
- - - - - R/W R/W R/W
R/W
Address
Initial value
P72 pull-up OFF P71 pull-up OFF P70 pull-up OFF
P72 pull-up ON
P71 pull-up ON P70 pull-up ON
: Readable/Writable
: Initial value