Rev. 3.0, 10/02, page 251 of 686
9.10.1
Port E Data Direction Register (PEDDR)
The individual bits of PEDDR specify input or output for the pins of port E.
Bit
Bit Name Initial Value
R/W
Description
7
PE7DDR
0
W
6
PE6DDR
0
W
5
PE5DDR
0
W
4
PE4DDR
0
W
3
PE3DDR
0
W
2
PE2DDR
0
W
1
PE1DDR
0
W
0
PE0DDR
0
W
Modes 4 to 6:
When 8-bit bus mode is selected, port E functions as an
I/O port. Setting a PEDDR bit to 1 makes the
corresponding port E pin an output port, while clearing the
bit to 0 makes the pin an input port. When 16-bit bus
mode is selected, the input/output direction settings in
PEDDR are ignored, and port E pins automatically
function as data input/output pins.
Mode 7:
Setting a PEDDR bit to 1 makes the corresponding port E
pin an output port, while clearing the bit to 0 makes the
pin an input port.
9.10.2
Port E Data Register (PEDR)
PEDR stores output data for the port E pins.
Bit
Bit Name Initial Value
R/W
Description
7
PE7DR
0
R/W
6
PE6DR
0
R/W
5
PE5DR
0
R/W
4
PE4DR
0
R/W
3
PE3DR
0
R/W
2
PE2DR
0
R/W
1
PE1DR
0
R/W
0
PE0DR
0
R/W
An output data for a pin is stored when the pin function is
specified to a general purpose output port.
Содержание H8S/2215 Series
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