Datasheet

Section 9 I/O Ports
Rev.6.00 Mar. 18, 2009 Page 348 of 980
REJ09B0050-0600
9.3.2 Port 3 Data Register (P3DR)
P3DR stores output data for the port 3 pins.
Bit Bit Name Initial Value R/W Description
7, 6 — All 0 — Reserved
These bits are always read as 0 and cannot be
modified.
5 P35DR 0 R/W
4 P34DR 0 R/W
3 P33DR 0 R/W
Output data for a pin is stored when the pin function
is specified to a general purpose I/O.
2 P32DR 0 R/W
1 P31DR 0 R/W
0 P30DR 0 R/W
9.3.3 Port 3 Register (PORT3)
PORT3 shows the pin states.
PORT3 cannot be modified.
Bit Bit Name Initial Value R/W Description
7, 6 — All 0 — Reserved
These bits are always read as 0 and cannot be
modified.
5 P35 —
*
R
4 P34 —
*
R
3 P33 —
*
R
If a port 3 read is performed while P3DDR bits are
set to 1, the P3DR values are read. If a port 1 read
is performed while P3DDR bits are cleared to 0, the
pin states are read.
2 P32 —
*
R
1 P31 —
*
R
0 P30 —
*
R
Note: * Determined by the states of pins P35 to P30.