Hitachi H8/3937 Series Hardware Manual page 474

PDR9—Port data register 9
Bit 7
—
Initial value 0
Read/Write —
PDRA—Port data register A
Bit 7
—
Initial value 1
Read/Write —
PDRB—Port data register B
Bit 7
PB
Read/Write R
462
6 5
— —
0 0
— —
6 5
— —
1 1
— —
6 5
PB PB
7 6 5
R R
4 3
— P9
3
0 0
— R/W
4 3
— PA
3
1 0
— R/W
4 3
PB PB
4 3
R R
Read port B pin states
H'DC I/O ports
2 1
P9 P9
2 1
0 0
R/W R/W
Data for port 9 pins
H'DD I/O ports
2 1
PA PA
2 1
0 0
R/W R/W
Data for port A pins
H'DE I/O ports
2 1
PB PB
2 1
R R
0
P9
0
0
R/W
0
PA
0
0
R/W
0
PB
0
R