HD64F3437TF16 Datasheet, PDF (682/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

P9DR—Port 9 Data Register
H'C1
Port 9
Bit
Initial value
Read/Write
7
P9₇
0
R/W
6
5
4
3
2
1
0
P9₆
P9₅
P9₄
P9₃
P9₂
P9₁
P9₀
*
0
0
0
0
0
0
R
R/W R/W R/W R/W R/W R/W
Note: ^* Depends on the level of pin P9₆.
PADDR—Port A Data Direction Register
H'AB
Port A
Bit
Initial value
Read/Write
7
6
5
4
3
2
1
0
PA₇DDR PA₆DDR PA₅DDR PA₄DDR PA₃DDR PA₂DDR PA₁DDR PA₀DDR
0
0
0
0
0
0
0
0
W
W
W
W
W
W
W
W
Port A Input/Output Control
0 Input port
1 Output port
PAPIN—Port A Input Data Register
H'AB
Bit
7
6
5
4
3
2
1
PA₇
PA₆
PA₅
PA₄
PA₃
PA₂
PA₁
Initial value
—*
—*
—*
—*
—*
—*
—*
Read/Write
R
R
R
R
R
R
R
Note: * Depends on the levels of pins PA₇ to PA₀.
PAODR—Port A Output Data Register
H'AA
Bit
Initial value
Read/Write
7
PA₇
0
R/W
6
PA₆
0
R/W
5
PA₅
0
R/W
4
PA₄
0
R/W
3
PA₃
0
R/W
2
PA₂
0
R/W
1
PA₁
0
R/W
Port A Output Data/Input Pull-Up Control
During output
During input
0
0 output
Input pull-up transistor off
1
1 output
Input pull-up transistor on
Port A
0
PA₀
—*
R
Port A
0
PA₀
0
R/W
653