HD6412350 Hitachi, HD6412350 Datasheet - Page 369

• Manufacturer Part Number: HD6412350
• Description: (HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
• Manufacturer: Hitachi

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.
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.
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.
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.
Port 5 Register (PORT5)
PORT5 is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port 5 pins (P5
Bit
Initial value
R/W
Note: * Determined by state of pins P5
Bit
Initial value
R/W
Bit
Initial value
R/W
:
:
:
:
:
:
:
:
:
Undefined
Undefined
Undefined
—
—
—
—
—
—
7
7
7
Undefined
Undefined
Undefined
—
—
—
—
—
—
6
6
6
3
to P5
Undefined
Undefined
Undefined
3
0
—
—
—
—
) must always be performed on P5DR.
5
5
—
—
to P5
5
0
Undefined
Undefined
.
Undefined
—
—
—
—
4
4
—
—
4
P53DDR
P53DR
R/W
P53
—*
W
3
0
3
0
R
3
P52DDR
P52DR
R/W
P52
—*
W
2
0
2
0
R
2
P51DDR
P51DR
R/W
P51
—*
W
1
0
1
0
R
1
P50DDR
3
P50DR
to P5
R/W
P50
—*
W
0
0
0
0
R
0
0
349
).