28. General Purpose I/O Ports (GPIO)
Rev.1.00 Jan. 10, 2008 Page 1431 of 1658
REJ09B0261-0100
28.2.30 Port P Data Register (PPDR) PPDR is an 8-bit readable/writable register that stores port P data.
01234567
00000000
PP0DTPP1DTPP2DTPP3DTPP4DTPP5DT——
R/WR/WR/WR/WR/WR/WR/WR/W
Bit:
Initial value:
R/W:
Bit Bit Name
Initial
value R/W Description
7 and 6 ⎯ All 0 R/W Reserved
These bits are always read as 0, and the write value
should always be 0.
5 PP5DT 0* R/W
4 PP4DT 0* R/W
3 PP3DT 0* R/W
2 PP2DT 0* R/W
1 PP1DT 0* R/W
0 PP0DT 0* R/W
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.
Note: * When the bus mode is set to the local bus 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.