r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 579

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

10.5
Port 5 is a 4-bit I/O port. Port 5 has the following registers. For the port function control registers,
refer to section 10.18, Port Function Control Registers.
• Port 5 data direction register (P5DDR)
• Port 5 data register (P5DR)
• Port 5 register (PORT5)
• Port 5 open drain control register (P5ODR)
• Port function control register 4 (PFCR4)
10.5.1
The individual bits of P5DDR specify input or output for the pins of port 5. P5DDR cannot be
read; if it is, an undefined value will be read.
10.5.2
P5DR stores output data for the port 5 pins.
Bit
7 to 4 
3
2
1
0
Bit
7 to 4
3
2
1
0
Bit Name
P53DDR
P52DDR
P51DDR
P50DDR
Bit Name

P53DR
P52DR
P51DR
P50DR
Port 5
Port 5 Data Direction Register (P5DDR)
Port 5 Data Register (P5DR)
All 0
0
0
0
0
All 0
0
0
0
0
Initial Value
Initial Value
R/W

W
W
W
W
R/W

R/W
R/W
R/W
R/W
Description
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.
Description
Reserved
These bits are always read as 0 and cannot be
modified.
Output data for a pin is stored when the pin function
is specified as a general purpose I/O.
Rev. 1.00 Sep. 19, 2008 Page 549 of 1342
Section 10 I/O Ports
REJ09B0467-0100