Datasheet

Section 8 I/O Ports
Rev. 8.00 Mar. 09, 2010 Page 207 of 658
REJ09B0042-0800
Port Mode Register 3 (PMR3)
Bit
Initial value
Read/Write
7
AEVL
0
R/W
6
AEVH
0
R/W
5
⎯
⎯
W
4
⎯
⎯
W
3
⎯
⎯
W
0
UD
0
R/W
2
TMOFH
0
R/W
1
TMOFL
0
R/W
PMR3 is an 8-bit read/write register, controlling the selection of pin functions for port 3 pins.
Bit 7—P3
7
/AEVL Pin Function Switch (AEVL)
This bit selects whether pin P3
7
/AEVL is used as P3
7
or as AEVL.
Bit 7
AEVL Description
0 Functions as P3
7
I/O pin (initial value)
1 Functions as AEVL input pin
Bit 6—P3
6
/AEVH Pin Function Switch (AEVH)
This bit selects whether pin P3
6
/AEVH is used as P3
6
or as AEVH.
Bit 6
AEVH Description
0 Functions as P3
6
I/O pin (initial value)
1 Functions as AEVH input pin
Bits 5 to 3—Reserved
These bits are reserved; they can only be written with 0.
Bit 2—P3
2
/TMOFH Pin Function Switch (TMOFH)
This bit selects whether pin P3
2
/TMOFH is used as P3
2
or as TMOFH.
Bit 2
TMOFH Description
0 Functions as P3
2
I/O pin (initial value)
1 Functions as TMOFH output pin