Hitachi H8/3008 Hardware Manual page 167

Bits 7 to 5 are reserved. They are fixed at 1, and cannot be modified.
Bit
Initial value
Read/Write
P8DR is initialized to H'E0 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.
7 6
— —
1 1
— —
Reserved bits
5 4
— P8 P8
4
1 0
— R/W R/W
3 2
P8 P8
3 2
0 0
R/W R/W
Port 8 data 4 to 0
These bits store data
for port 8 pins
1 0
P8
1 0
0 0
R/W
151