Hitachi H8/3006 Hardware Manual page 272

P8DDR is initialized to H'F0 by a reset and in hardware standby mode. In software standby mode
P8DDR retains its previous setting. Therefore, when port 8 functions as an input/output port, if a
transition is made to software standby mode while a P8DDR bit is set to 1, the corresponding pin
maintains its output state.
Port 8 Data Register (P8DR): P8DR is an 8-bit readable/writable register that stores output data
for port 8. When a bit in P8DDR is set to 1, if port 8 is read the value of the corresponding P8DR
bit is returned. When a bit in P8DDR is cleared to 0, if port 8 is read the corresponding pin level
is read.
Bits 7 to 5 are reserved. They cannot be modified and always are read as 1.
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 5
— —
1 1 1
— —
Reserved bits
4 3
P8 P8 P8
4 3
0 0
R/W R/W R/W
Port 8 data 4 to 0
These bits store data
for port 8 pins
2 1 0
P8 P8
2 1
0 0 0
R/W R/W
0
255