r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 557

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

10.2
Port 2 is an 8-bit I/O port that also has other functions. Port 2 has the following registers. For the
port function control registers, refer to section 10.18, Port Function Control Registers.
• Port 2 data direction register (P2DDR)
• Port 2 data register (P2DR)
• Port 2 register (PORT2)
• Port 2 open drain control register (P2ODR)
• Port function control register 3 (PFCR3)
10.2.1
The individual bits of P2DDR specify input or output for the pins of port 2. P2DDR cannot be
read; if it is, an undefined value will be read.
Bit
7
6
5
4
3
2
1
0
Bit Name
P27DDR
P26DDR
P25DDR




P20DDR
Port 2
Port 2 Data Direction Register (P2DDR)
0
0
0
0
0
0
0
0
Initial Value
R/W
W
W
W




W
Description
When a pin function is specified as a general
purpose I/O, setting this bit to 1 makes the
corresponding pin an output port, while clearing this
bit to 0 makes the corresponding pin an input port.
Bits 4 to 0 are reserved.
When a pin function is specified as a general
purpose I/O, setting this bit to 1 makes the
corresponding pin an output port, while clearing this
bit to 0 makes the corresponding pin an input port.
Rev. 1.00 Sep. 19, 2008 Page 527 of 1342
Section 10 I/O Ports
REJ09B0467-0100