HD6412350 Hitachi, HD6412350 Datasheet - Page 351

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

9.3.2
Table 9-4 shows the port 2 register configuration.
Table 9-4
Name
Port 2 data direction register
Port 2 data register
Port 2 register
Note: * Lower 16 bits of the address.
Port 2 Data Direction Register (P2DDR)
P2DDR is an 8-bit write-only register, the individual bits of which specify input or output for the
pins of port 2. P2DDR cannot be read; if it is, an undefined value will be read.
Setting a P2DDR bit to 1 makes the corresponding port 2 pin an output pin, while clearing the bit
to 0 makes the pin an input pin.
P2DDR 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. As the PPG and TPU are initialized
by a manual reset, the pin states are determined by the P2DDR and P2DR specifications.
Port 2 Data Register (P2DR)
P2DR is an 8-bit readable/writable register that stores output data for the port 2 pins (P2
P2DR 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.
Bit
Initial value
R/W
Bit
Initial value
R/W
Register Configuration
Port 2 Registers
:
:
:
:
:
:
P27DDR
P27DR
R/W
7
0
W
7
0
P26DDR
P26DR
R/W
W
6
0
6
0
Abbreviation
P2DDR
P2DR
PORT2
P25DDR
P25DR
R/W
W
5
0
5
0
P24DDR
P24DR
R/W
W
4
0
4
0
R/W
W
R/W
R
P23DDR
P23DR
R/W
W
3
0
3
0
Initial Value
H'00
H'00
Undefined
P22DDR
P22DR
R/W
W
2
0
2
0
P21DDR
P21DR
R/W
W
1
0
1
0
Address*
H'FEB1
H'FF61
H'FF51
P20DDR
7
P20DR
to P2
R/W
W
0
0
0
0
0
331
).