H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 364

• Manufacturer Part Number: H8S-2350
• Description: 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 9 I/O Ports
Port 1 Data Direction Register (P1DDR)
P1DDR is an 8-bit write-only register, the individual bits of which specify input or output for the
pins of port 1. P1DDR cannot be read; if it is, an undefined value will be read.
Setting a P1DDR bit to 1 makes the corresponding port 1 pin an output pin, while clearing the bit
to 0 makes the pin an input pin.
P1DDR 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 PPG, TPU, and DMAC are
initialized by a manual reset, the pin states are determined by the P1DDR and P1DR
specifications.
Port 1 Data Register (P1DR)
P1DR is an 8-bit readable/writable register that stores output data for the port 1 pins (P1
P1DR 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.
Rev. 3.00 Sep 15, 2006 page 330 of 988
REJ09B0330-0300
Bit
Initial value
R/W
Bit
Initial value
R/W
:
:
:
:
:
:
P17DDR
P17DR
R/W
W
7
0
7
0
P16DDR
P16DR
R/W
W
6
0
6
0
P15DDR
P15DR
R/W
W
5
0
5
0
P14DDR
P14DR
R/W
W
4
0
4
0
P13DDR
P13DR
R/W
W
3
0
3
0
P12DDR
P12DR
R/W
W
2
0
2
0
P11DDR
P11DR
R/W
W
1
0
1
0
P10DDR
P10DR
7
R/W
to P1
W
0
0
0
0
0
).