HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 550

• Manufacturer Part Number: HD6412373R
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 10 I/O Ports
10.3
Port 3 is a 6-bit I/O port that also has other functions. 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)
• Port function control register 2(PFCR2)
10.3.1
The individual bits of P3DDR specify input or output for the pins of port 3.
P3DDR cannot be read; if it is, an undefined value will be read.
Bit
7, 6
5
4
3
2
1
0
Rev.7.00 Mar. 18, 2009 page 482 of 1136
REJ09B0109-0700
Bit Name
⎯
P30DDR
P35DDR
P34DDR
P33DDR
P32DDR
P31DDR
Port 3
Port 3 Data Direction Register (P3DDR)
Initial Value
All 0
0
0
0
0
0
0
R/W
⎯
W
W
W
W
W
W
Description
Reserved
These bits are always read as 0 and cannot be
modified.
When a pin function is specified to a general
purpose I/O, setting this bit to 1 makes the
corresponding port 1 pin an output pin, while
clearing this bit to 0 makes the pin an input pin.