HD64F3028F25 Datasheet, PDF (314/925 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

Port 9 Data Register (P9DR): P9DR is an 8-bit readable/writable register that stores output data
for port 9. When port 9 functions as an output port, the value of this register is output. When a bit
in P9DDR is set to 1, if port 9 is read the value of the corresponding P9DR bit is returned. When a
bit in P9DDR is cleared to 0, if port 9 is read the corresponding pin logic level is read.
Bits 7 and 6 are reserved. They are fixed at 1, and cannot be modified.
Bit
7
—
Initial value
1
Read/Write
—
6
5
4
3
2
1
0
—
P9 ₅
P9₄
P9 ₃
P9 ₂
P9 ₁
P9 ₀
1
0
0
0
0
0
0
—
R/W
R/W
R/W
R/W
R/W R/W
Reserved bits
Port 9 data 5 to 0
These bits store data
for port 9 pins
P9DR is initialized to H'C0 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.
Rev. 2.00, 09/03, page 282 of 890