HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 267

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Port 2 Data Direction Register (P2DDR)
P2DDR is an 8-bit write-only register, the individual bits of which specify input or output for the
pins of port 2. P2DDR cannot be read; if it is, an undefined value will be read.
Setting a P2DDR bit to 1 makes the corresponding port 2 pin an output pin, while clearing the bit
to 0 makes the pin an input pin.
This register is a write-only register, and cannot be written by bit manipulation instruction. For
details, see section 2.10.4, Access Methods for Registers with Write-Only Bits.
P2DDR is initialized to H'00 by a power-on reset, and in hardware standby mode. It retains its
prior state after a manual reset, and in software standby mode. As the 8-bit timer is initialized by a
manual reset, the pin states are determined by the P2DDR and P2DR specifications.
Port 2 Data Register (P2DR)
P2DR is an 8-bit readable/writable register that stores output data for the port 2 pins (P2
P2DR is initialized to H'00 by a power-on reset, and in hardware standby mode. It retains its prior
state after a manual reset, and in software standby mode.
Bit
Initial value
R/W
Bit
Initial value
R/W
:
:
:
:
:
:
P27DDR
P27DR
R/W
W
7
0
7
0
P26DDR
P26DR
R/W
W
6
0
6
0
P25DDR
P25DR
R/W
W
5
0
5
0
P24DDR
P24DR
R/W
W
4
0
4
0
Rev.3.00 Mar. 26, 2007 Page 225 of 772
P23DDR
P23DR
R/W
W
3
0
3
0
P22DDR
P22DR
R/W
W
2
0
2
0
P21DDR
P21DR
Section 8 I/O Ports
R/W
REJ09B0355-0300
W
1
0
1
0
P20DDR
7
P20DR
to P2
R/W
W
0
0
0
0
0
).