DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 277

• 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

8.2
The port 3 is a 4-bit I/O port also functioning as the SCI I/O pins and external interrupt input
(IRQ4) pins. The port 3 of the H8S/2218 Group has the same function as that of the H8S/2212
Group. The port 3 has the following registers.
• Port 3 data direction register (P3DDR)
• Port 3 data register (P3DR)
• Port 3 register (PORT3)
• Port 3 open-drain control register (P3ODR)
8.2.1
P3DDR specifies input or output for the pins of the port 3.
Since P3DDR is a write-only register, the bit manipulation instructions must not be used to write
P3DDR. For details, see section 2.9.4, Accessing Registers Containing Write-Only Bits.
Bit
7
6
5 to
3
2
1
0
Bit Name Initial Value
⎯
P36DDR
⎯
P32DDR
P31DDR
P30DDR
Port 3
Port 3 Data Direction Register (P3DDR)
Undefined
Undefined
0
0
0
0
R/W
⎯
W
⎯
W
W
W
Reserved
This bit is undefined and cannot be modified.
pin an output pin, while clearing the bit to 0 makes the pin
an input pin.
Reserved
These bits are undefined and cannot be modified.
Setting a P3DDR bit to 1 makes the corresponding port 3
pin an output pin, while clearing the bit to 0 makes the pin
an input pin.
Description
Setting a P3DDR bit to 1 makes the corresponding port 3
Rev.7.00 Dec. 24, 2008 Page 223 of 698
REJ09B0074-0700