H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 365

• Manufacturer Part Number: H8S-2350
• Description: 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Port 1 Register (PORT1)
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 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.
Bit
Initial value
R/W
Note: * Determined by state of pins P1
:
:
:
P17
—*
R
7
P16
—*
R
6
7
to P1
P15
0
—*
7
) must always be performed on P1DR.
R
5
to P1
0
.
P14
—*
R
4
Rev. 3.00 Sep 15, 2006 page 331 of 988
P13
—*
R
3
P12
—*
R
2
Section 9 I/O Ports
REJ09B0330-0300
P11
—*
R
1
P10
—*
R
0