131
Bit 3—P2
3
/SO
1
Pin Function Switch (SO1): This bit selects whether pin P2
3
/SO
1
is used as P2
3
or as SO
1
.
Bit 3: SO1
Description
0
Functions as P2
3
I/O pin
(initial value)
1
Functions as SO
1
output pin
Bit 2—P2
2
/SI
1
Pin Function Switch (SI1): This bit selects whether pin P2
2
/SI
1
is used as P2
2
or
as SI
1
.
Bit 2: SI1
Description
0
Functions as P2
2
I/O pin
(initial value)
1
Functions as SI
1
input pin
Bit 1—P2
1
/SCK
1
Pin Function Switch (SCK1): This bit selects whether pin P2
1
/SCK
1
is used as
P2
1
or as SCK
1
.
Bit 1: SCK1
Description
0
Functions as P2
1
I/O pin
(initial value)
1
Functions as SCK
1
I/O pin
Bit 0—P2
0
/
IRQ
4
/
ADTRG
Pin Function Switch (IRQ4): This bit selects whether pin
P2
0
/
IRQ
4
/
ADTRG
is used as P2
0
or as
IRQ
4
/
ADTRG
.
Bit 0: IRQ4
Description
0
Functions as P2
0
I/O pin
(initial value)
1
Functions as
IRQ
4
/
ADTRG
input pin
Note:
For information about
ADTRG
pin settings, see 12.3.2, Start of A/D Conversion by External
Trigger Input.