HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 280

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 8 I/O Ports
Port 5 Register (PORT5)
PORT5 is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port 5 pins (P5
Bits 7 to 4 are reserved; they return an undetermined value if read, and cannot be modified.
If a port 5 read is performed while P5DDR bits are set to 1, the P5DR values are read. If a port 5
read is performed while P5DDR bits are cleared to 0, the pin states are read.
After a power-on reset and in hardware standby mode, PORT5 contents are determined by the pin
states, as P5DDR and P5DR are initialized. PORT5 retains its prior state after a manual reset, and
in software standby mode.
Rev.3.00 Mar. 26, 2007 Page 238 of 772
REJ09B0355-0300
Bit
Initial value
R/W
Note: * Determined by state of pins P5
:
:
:
Undefined
—
—
7
Undefined
—
—
6
3
to P5
Undefined
0
) must always be performed on P5DR.
—
—
3
5
to P5
Undefined
0
.
—
—
4
P53
—*
R
3
P52
—*
R
2
P51
—*
R
1
P50
—*
R
0