HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 406
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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Section 9 I/O Ports
Port 3 Register (PORT3)
Note: * Determined by state of pins P3
PORT3 is an 8-bit read-only register that shows the pin states. Writing of 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.
If a port 3 read is performed while P3DDR bits are set to 1, the P3DR values are read. If a port 3
read is performed while P3DDR bits are cleared to 0, the pin states are read.
After a reset and in hardware standby mode, PORT3 contents are determined by the pin states, as
P3DDR and P3DR are initialized. PORT3 retains its prior state in software standby mode.
Port 3 Open Drain Control Register (P3ODR)
P3ODR is an 8-bit readable/writable register that controls the PMOS on/off status for each port 3
pin (P3
Bits 7 and 6 are reserved; they return an undefined value if read, and cannot be modified.
Setting a P3ODR bit to 1 makes the corresponding port 3 pin an NMOS open-drain output pin,
while clearing the bit to 0 makes the pin a CMOS output pin.
P3ODR 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.
Rev.6.00 Sep. 27, 2007 Page 376 of 1268
REJ09B0220-0600
Bit
Initial value :
R/W
Bit
Initial value :
R/W
5
5
to P3
to P3
0
:
:
:
:
).
0
) must always be performed on P3DR.
Undefined Undefined
Undefined Undefined
—
—
—
—
7
7
—
—
—
—
6
6
P35ODR P34ODR P33ODR P32ODR P31ODR P30ODR
5
to P3
R/W
P35
— *
R
5
5
0
0
.
R/W
P34
— *
R
4
4
0
R/W
P33
— *
R
3
3
0
R/W
P32
— *
R
2
2
0
R/W
P31
— *
R
1
1
0
R/W
P30
— *
R
0
0
0
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