HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 384

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 9 I/O Ports
Port 1 Data Register (P1DR)
P1DR is an 8-bit readable/writable register that stores output data for the port 1 pins (P1
P1DR is initialized to H'00 by a reset, and in hardware standby mode. It retains its prior state in
software standby mode.
Port 1 Register (PORT1)
Note: * Determined by state of pins P1
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 (P1
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 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 in software standby mode.
Rev.6.00 Sep. 27, 2007 Page 354 of 1268
REJ09B0220-0600
Bit
Initial value :
R/W
Bit
Initial value :
R/W
:
:
:
:
P17DR
R/W
P17
— *
R
7
0
7
P16DR
R/W
P16
— *
R
6
0
6
7
to P1
7
P15DR
to P1
R/W
P15
— *
0
R
) must always be performed on P1DR.
5
0
5
0
.
P14DR
R/W
P14
— *
R
4
0
4
P13DR
R/W
P13
— *
R
3
0
3
P12DR
R/W
P12
— *
R
2
0
2
P11DR
R/W
P11
— *
R
1
0
1
7
to P1
P10DR
R/W
P10
— *
R
0
0
0
0
).