HD6412340 HITACHI [Hitachi Semiconductor], HD6412340 Datasheet - Page 274
HD6412340
Manufacturer Part Number
HD6412340
Description
H8S/2345 F-ZTAT Hardware Manual
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HD6412340.pdf
(907 pages)
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Port D Data Register (PDDR)
PDDR is an 8-bit readable/writable register that stores output data for the port D pins (PD
PD
PDDR is initialized to H'00 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 D Register (PORTD)
PORTD is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port D pins (PD
If a port D read is performed while PDDDR bits are set to 1, the PDDR values are read. If a port D
read is performed while PDDDR bits are cleared to 0, the pin states are read.
After a power-on reset and in hardware standby mode, PORTD contents are determined by the pin
states, as PDDDR and PDDR are initialized. PORTD retains its prior state after a manual reset,
and in software standby mode.
Bit
Initial value
R/W
Note: * Determined by state of pins PD
Bit
Initial value
R/W
0
).
:
:
:
:
:
:
PD7DR
R/W
PD7
—*
R
7
0
7
PD6DR
R/W
PD6
—*
R
6
0
6
7
to PD
PD5DR
R/W
PD5
7
—*
R
5
0
5
to PD
0
) must always be performed on PDDR.
0
.
PD4DR
R/W
PD4
—*
R
4
0
4
PD3DR
R/W
PD3
—*
R
3
0
3
PD2DR
R/W
PD2
—*
R
2
0
2
PD1DR
R/W
PD1
—*
R
1
0
1
PD0DR
7
R/W
PD0
to
—*
R
0
0
0
257
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