HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 405
HD6412320
Manufacturer Part Number
HD6412320
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412320.pdf
(1302 pages)
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Port 3 Data Direction Register (P3DDR)
P3DDR is an 8-bit write-only register, the individual bits of which specify input or output for the
pins of port 3. Bits 7 and 6 are reserved. P3DDR cannot be read; if it is, an undefined value will be
read.
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.
P3DDR is initialized to H'00 (bits 5 to 0) by a reset, and in hardware standby mode. It retains its
prior state in software standby mode. As the SCI is initialized, the pin states are determined by the
P3DDR and P3DR specifications.
Port 3 Data Register (P3DR)
P3DR is an 8-bit readable/writable register that stores output data for the port 3 pins (P3
Bits 7 and 6 are reserved; they return an undefined value if read, and cannot be modified.
P3DR is initialized to H'00 (bits 5 to 0) by a reset, and in hardware standby mode. It retains its
prior state in software standby mode.
Bit
Initial value :
R/W
Bit
Initial value :
R/W
:
:
:
:
Undefined Undefined
Undefined Undefined
—
—
—
—
7
7
—
—
—
—
6
6
P35DDR P34DDR P33DDR P32DDR P31DDR P30DDR
P35DR
R/W
W
5
0
5
0
P34DR
R/W
W
4
0
4
0
Rev.6.00 Sep. 27, 2007 Page 375 of 1268
P33DR
R/W
W
3
0
3
0
P32DR
R/W
W
2
0
2
0
Section 9 I/O Ports
REJ09B0220-0600
P31DR
R/W
W
0
0
1
1
5
to P3
P30DR
R/W
W
0
0
0
0
0
).
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