HD6412340 HITACHI [Hitachi Semiconductor], HD6412340 Datasheet - Page 238

• Manufacturer Part Number: HD6412340
• Description: H8S/2345 F-ZTAT Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

Port 2 Register (PORT2)
PORT2 is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port 2 pins (P2
If a port 2 read is performed while P2DDR bits are set to 1, the P2DR values are read. If a port 2
read is performed while P2DDR bits are cleared to 0, the pin states are read.
After a power-on reset and in hardware standby mode, PORT2 contents are determined by the pin
states, as P2DDR and P2DR are initialized. PORT2 retains its prior state after a manual reset, and
in software standby mode.
8.3.3
Port 2 pins also function as TPU I/O pins (TIOCA3, TIOCB3, TIOCC3, TIOCD3, TIOCA4,
TIOCB4, TIOCA5, and TIOCB5), and 8-bit timer I/O pins (TMRI0, TMCI0, TMO0, TMRI1,
TMCI1, and TMO1). Port 2 pin functions are shown in table 8.5.
Bit
Initial value
R/W
Note: * Determined by state of pins P2
Pin Functions
:
:
:
P27
—*
R
7
P26
—*
R
6
7
to P2
P25
—*
7
0
R
) must always be performed on P2DR.
5
to P2
0
.
P24
—*
R
4
P23
—*
R
3
P22
—*
R
2
P21
—*
R
1
P20
—*
R
0
221