
CHAPTER 4 PORT FUNCTIONS
User’s Manual U15905EJ2V1UD
102
(e) Pull-up resistor option register 2 (PU2)
This is an 8-bit register that specifies connection of an internal pull-up resistor.
This register can be read or written in 8-bit or 1-bit units.
0
Not connected
Connected
PU2n
0
1
Controls connection of internal pull-up resistor (n = 0 to 2)
PU2
0
PU22
PU21
PU20
After reset: 00H
R/W
Address: FFFFFC44H