DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 304

• Manufacturer Part Number: DF2211NP24V
• Description: H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
• Manufacturer: Renesas Technology / Hitachi Semiconductor

8.9
The port D is an 8-bit I/O port also functioning as data bus (D15 to D8) I/O pins. The port D has
the following registers.
• Port D data direction register (PDDDR)
• Port D data register (PDDR)
• Port D register (PORTD)
• Port D pull-up MOS control register (PDPCR)
8.9.1
PDDDR specifies input or output for the pins of the port D.
Since PDDDR is a write-only register, the bit manipulation instructions must not be used to write
PDDDR. For details, see section 2.9.4, Accessing Registers Containing Write-Only Bits.
Rev.7.00 Dec. 24, 2008 Page 250 of 698
REJ09B0074-0700
Bit
7
6
5
4
3
2
1
0
Bit Name Initial Value
PD7DDR
PD6DDR
PD5DDR
PD4DDR
PD3DDR
PD2DDR
PD1DDR
PD0DDR
Port D Data Direction Register (PDDDR)
Port D (H8S/2218 Group Only)
0
0
0
0
0
0
0
0
W
W
W
W
W
W
W
W
R/W
Description
Modes 4 to 6:
Port D pins automatically function as data input/output
pins.
Mode 7:
Setting a PDDDR bit to 1 makes the corresponding port D
pin an output port, while clearing the bit to 0 makes the
pin an input port.