HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 202

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

7. I/O Ports
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.
P9DR is initialized to H'C0 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.
Rev.4.00 Aug. 20, 2007 Page 158 of 638
REJ09B0395-0400
Bit
Initial value
Read/Write
Reserved bits
⎯
⎯
7
1
⎯
⎯
6
1
R/W
P9
5
0
5
R/W
P9
4
0
4
Port 9 data 5 to 0
These bits store data
for port 9 pins
R/W
P9
3
0
3
R/W
P9
2
0
2
R/W
P9
1
0
1
R/W
P9
0
0
0