HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 279

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Port 5 Data Direction Register (P5DDR)
P5DDR is an 8-bit write-only register, the individual bits of which specify input or output for the
pins of port 5. Bits 7 to 4 are reserved. P5DDR cannot be read; if it is, an undefined value will be
read. P5DDR cannot be modified.
Setting a P5DDR bit to 1 makes the corresponding port 5 pin an output pin, while clearing the bit
to 0 makes the pin an input pin.
This register is a write-only register, and cannot be written by bit manipulation instruction. For
details, see section 2.10.4, Access Methods for Registers with Write-Only Bits.
P5DDR is initialized to H'0 (bits 3 to 0) by a power-on reset, and in hardware standby mode. It
retains its prior state after a manual reset, and in software standby mode. As the SCI is initialized
by a reset and in standby mode, the pin states are determined by the P5DDR and P5DR
specifications.
Port 5 Data Register (P5DR)
P5DR is an 8-bit readable/writable register that stores output data for the port 5 pins (P5
Bits 7 to 4 are reserved; they return an undetermined value if read, and cannot be modified.
P5DR is initialized to H'0 (bits 3 to 0) by a power-on reset, and in hardware standby mode. It
retains its prior state after a manual reset, and in software standby mode.
Bit
Initial value
R/W
Bit
Initial value
R/W
:
:
:
:
:
:
Undefined
Undefined
—
—
—
—
7
7
Undefined
Undefined
—
—
—
—
6
6
Undefined
Undefined
—
—
—
—
5
5
Undefined
Undefined
—
—
—
—
4
4
Rev.3.00 Mar. 26, 2007 Page 237 of 772
P53DDR
P53DR
R/W
W
3
0
3
0
P52DDR
P52DR
R/W
W
2
0
2
0
P51DDR
P51DR
Section 8 I/O Ports
R/W
REJ09B0355-0300
W
1
0
1
0
P50DDR
P50DR
3
to P5
R/W
W
0
0
0
0
0
).