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Appendix B Internal I/O Registers
PDR4—Port data register 4
Bit
⎯
Initial value
⎯
Read/Write
PDR5—Port data register 5
Bit
P5
Initial value
Read/Write
R/W
PDR9—Port data register 9
Bit
P9
Initial value
Read/Write
R/W
PDRA—Port data register A
Bit
⎯
Initial value
⎯
Read/Write
PDRB—Port data register B
Bit
PB
Read/Write
R
Note: * PB
to PB
3
In the H8/3854 Group these bits are reserved.
Rev.3.00 Jul. 19, 2007 page 496 of 532
REJ09B0397-0300
7
6
5
⎯
⎯
1
1
1
⎯
⎯
7
6
5
P5
P5
7
6
0
0
0
R/W
R/W
7
6
5
P9
P9
7
6
0
0
0
R/W
R/W
7
6
5
⎯
⎯
0
0
0
⎯
⎯
7
6
5
PB
PB
7
6
R
R
are functions of the H8/3857 Group only.
0
4
3
⎯
P4
3
1
Undefined
⎯
R
4
3
P5
P5
5
4
3
0
0
R/W
R/W
4
3
P9
P9
5
4
3
0
0
R/W
R/W
4
3
⎯
PA
3
0
0
⎯
R/W
4
3
*
PB
PB
5
4
3
R
R
H'D7
2
1
P4
P4
2
1
0
0
R/W
R/W
H'D8
2
1
P5
P5
2
1
0
0
R/W
R/W
H'DC
2
1
P9
P9
2
1
0
0
R/W
R/W
H'DD
2
1
PA
PA
2
1
0
0
R/W
R/W
H'DE
2
1
*
*
PB
PB
2
1
R
R
I/O ports
0
P4
0
0
R/W
I/O ports
0
P5
0
0
R/W
I/O ports
0
P9
0
0
R/W
I/O ports
0
PA
0
0
R/W
I/O ports
0
*
PB
0
R
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