Datasheet

Section 9 I/O Ports
Rev.6.00 Sep. 27, 2007 Page 424 of 1268
REJ09B0220-0600
Port E Data Register (PEDR)
Bit : 7 6 5 4 3 2 1 0
PE7DR PE6DR PE5DR PE4DR PE3DR PE2DR PE1DR PE0DR
Initial value : 0 0 0 0 0 0 0 0
R/W : R/W R/W R/W R/W R/W R/W R/W R/W
PEDR is an 8-bit readable/writable register that stores output data for the port E pins (PE
7
to PE
0
).
PEDR is initialized to H'00 by a reset, and in hardware standby mode. It retains its prior state in
software standby mode.
Port E Register (PORTE)
Bit : 7 6 5 4 3 2 1 0
PE7 PE6 PE5 PE4 PE3 PE2 PE1 PE0
Initial value : —
*
—
*
—
*
—
*
—
*
—
*
—
*
—
*
R/W : R R R R R R R R
Note: * Determined by state of pins PE
7
to PE
0
.
PORTE is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port E pins (PE
7
to PE
0
) must always be performed on PEDR.
If a port E read is performed while PEDDR bits are set to 1, the PEDR values are read. If a port E
read is performed while PEDDR bits are cleared to 0, the pin states are read.
After a reset and in hardware standby mode, PORTE contents are determined by the pin states, as
PEDDR and PEDR are initialized. PORTE retains its prior state in software standby mode.