h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 171

• Manufacturer Part Number: h8s-2628
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

9.1
Port 1 is an 8-bit I/O port and has the following registers.
9.1.1
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.
Bit
7
6
5
4
3
2
1
0
Port 1 data direction register (P1DDR)
Port 1 data register (P1DR)
Port 1 register (PORT1)
Bit Name
P17DDR
P16DDR
P15DDR
P14DDR
P13DDR
P12DDR
P11DDR
P10DDR
Port 1 Data Direction Register (P1DDR)
Port 1
Initial Value
0
0
0
0
0
0
0
0
R/W
W
W
W
W
W
W
W
W
Description
When a pin is specified as a general purpose I/O
port, setting these bits to 1 makes the corresponding
port 1 pin an output pin. Clearing these bits to 0
makes the pin an input pin.
Rev. 3.00 Oct 04, 2005 page 131 of 598
Section 9 I/O Ports
REJ09B0155-0300