HD6432345 Datasheet, PDF (227/907 Pages) Hitachi Semiconductor – H8S/2345 F-ZTAT Hardware Manual

• Modes 4 to 6*
The corresponding port 1 pins are address outputs when P13DDR to P10DDR are set to 1, and
input ports when cleared to 0.
The corresponding port 1 pins are output ports when P17DDR to P14DDR are set to 1, and
input ports when cleared to 0.
Port 1 Data Register (P1DR)
Bit
:
7
6
5
4
3
2
1
0
P17DR P16DR P15DR P14DR P13DR P12DR P11DR P10DR
Initial value :
0
0
0
0
0
0
0
0
R/W
:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
P1DR is an 8-bit readable/writable register that stores output data for the port 1 pins (P1₇ to P1₀).
P1DR 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 1 Register (PORT1)
Bit
:
7
6
5
4
3
2
1
0
P17
P16
P15
P14
P13
P12
P11
P10
Initial value :
—*
—*
—*
—*
—*
—*
—*
—*
R/W
:
R
R
R
R
R
R
R
R
Note: * Determined by state of pins P17 to P10.
PORT1 is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port 1 pins (P1₇ to P1₀) must always be performed on P1DR.
If a port 1 read is performed while P1DDR bits are set to 1, the P1DR values are read. If a port 1
read is performed while P1DDR bits are cleared to 0, the pin states are read.
After a power-on reset and in hardware standby mode, PORT1 contents are determined by the pin
states, as P1DDR and P1DR are initialized. PORT1 retains its prior state after a manual reset, and
in software standby mode.
8.2.3 Pin Functions
Port 1 pins also function as TPU I/O pins (TCLKA, TCLKB, TCLKC, TCLKD, TIOCA0,
TIOCB0, TIOCC0, TIOCD0, TIOCA1, TIOCB1, TIOCA2, and TIOCB2) and address output pins
(A₂₃ to A₂₀). Port 1 pin functions are shown in table 8.3.
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