Port D; Port D Data Direction Register (Pdddr); Port D Data Register (Pddr) - Renesas H8S/2368 Series Hardware Manual

9.11

Port D

Port D is an 8-bit I/O port that also has other functions. The port D has the following registers.

• Port D data direction register (PDDDR)

• Port D data register (PDDR)

• Port D register (PORTD)
• Port D MOS pull-up control register (PDPCR)
9.11.1 Port D Data Direction Register (PDDDR)
The individual bits of PDDDR specify input or output for the pins of port D.
PDDDR cannot be read; if it is, an undefined value will be read.
Bit Bit Name Initial Value
7 PD7DDR 0
6 PD6DDR 0
5 PD5DDR 0
4 PD4DDR 0
3 PD3DDR 0
2 PD2DDR 0
1 PD1DDR 0
0 PD0DDR 0
9.11.2 Port D Data Register (PDDR)
PDDR stores output data for the port D pins.
Bit Bit Name Initial Value
7 PD7DR 0
6 PD6DR 0
5 PD5DR 0
4 PD4DR 0
3 PD3DR 0
2 PD2DR 0
1 PD1DR 0
0 PD0DR 0
Rev. 2.00, 05/03, page 356 of 820
R/W Description
•
W
Modes 1, 2, 4, and 7 (when EXPE = 1)
Port D is automatically designated for data
W
input/output.
W
•
Mode 7 (when EXPE = 0)
W
Port D is an I/O port, and its pin functions can be
W
switched with PDDDR.
W
W
W
R/W Description
R/W Output data for a pin is stored when the pin function
is specified to a general purpose I/O.
R/W
R/W
R/W
R/W
R/W
R/W
R/W