r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1462

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

28. General Purpose I/O Ports (GPIO)
28.2.31 Port Q Data Register (PQDR)
PQDR is an 8-bit readable/writable register that stores port Q data.
Note:
Rev.1.00 Jan. 10, 2008 Page 1432 of 1658
REJ09B0261-0100
Bit
7 to 5
4
3
2
1
0
*
Bit Name
⎯
PQ4DT
PQ3DT
PQ2DT
PQ1DT
PQ0DT
When the bus mode is set to the local bus or DU via the bus mode pins (MODE11 and
MODE12), the pin is initially used as a general-purpose input, and the pin status is read
from this register.
Initial value:
Initial
value
All 0
0*
0*
0*
0*
0*
R/W:
Bit:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
—
7
0
R/W
—
6
0
Description
Reserved
These bits are always read as 0, and the write value
should always be 0.
These bits store output data of a pin which is used as a
general-purpose output port. When the pin functions as
a general-purpose output port, reading the port will read
out the value of the corresponding bit of this register.
When the pin functions as a general-purpose input port,
reading the port will read out the status of the
corresponding pin.
R/W
—
5
0
PQ4DT
R/W
4
0
PQ3DT
R/W
3
0
PQ2DT
R/W
2
0
PQ1DT
R/W
1
0
PQ0DT
R/W
0
0