h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 206

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 9 I/O Ports
9.1
Port 1 is an 8-bit I/O port. Port 1 pins also function as PPG output pins, TPU I/O pins, and external
interrupt pins.
• Port 1 data direction register (P1DDR)
• Port 1 data register (P1DR)
• Port 1 register (PORT1)
9.1.1
P1DDR is a 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.
Rev. 2.00 Dec. 05, 2005 Page 168 of 724
REJ09B0200-0200
Bit
7
6
5
4
3
2
1
0
Port 1
Port 1 Data Direction Register (P1DDR)
Bit Name
P17DDR
P16DDR
P15DDR
P14DDR
P13DDR
P12DDR
P11DDR
P10DDR
Initial
Value
0
0
0
0
0
0
0
0
R/W
W
W
W
W
W
W
W
W
Description
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.