CHAPTER 4 PORT FUNCTIONS
User’s Manual U16896EJ2V0UD
96
(6) Pull-up resistor option register 9 (PU9)
Not connected
Connected
PU9n
0
1
Control of on-chip pull-up resistor connection (n = 0, 1, 6 to 9, 13 to 15)
PU9 (PU9H
Note
)
After reset: 0000H R/W Address: PU9 FFFFFC52H,
PU9L FFFFFC52H, PU9H FFFFFC53H
PU97
PU96
0
0
0
0
PU91
PU90
PU915
PU914
PU913
0
0
0
PU99
PU98
8
9
10
11
12
13
14
15
(PU9L)
Note
When reading from or writing to bits 8 to 15 of the PU9 register in 8-bit or 1-bit units,
specify these bits as bits 0 to 7 of the PU9H register.
Remark
The PU9 register can be read or written in 16-bit units.
However, when the higher 8 bits and the lower 8 bits of the PU9 register are used as
the PU9H register and as the PU9L register, respectively, these registers can be read
or written in 8-bit or 1-bit units.
