h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 339
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h8s-2635
Manufacturer Part Number
h8s-2635
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2635.pdf
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9.10.2
Table 9-17 shows the port E register configuration.
Table 9-17 Port E Registers
Note: * Lower 16 bits of the address.
Port E Data Direction Register (PEDDR)
PEDDR is an 8-bit write-only register, the individual bits of which specify input or output for the
pins of port E. PEDDR cannot be read; if it is, an undefined value will be read.
PEDDR is initialized to H'00 by a reset, and in hardware standby mode. It retains its prior state by
a manual reset or in software standby mode.
Name
Port E data direction register
Port E data register
Port E register
Port E MOS pull-up control register
Bit
Initial value :
R/W
Modes 4 to 6
When 8-bit bus mode has been selected, port E pins function as I/O ports. 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 has been selected, the input/output direction specification by PEDDR is
ignored, and port E is designated for data I/O.
For details of 8-bit and 16-bit bus modes, see section 7, Bus Controller.
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.
Register Configuration
:
:
PE7DDR PE6DDR PE5DDR PE4DDR PE3DDR PE2DDR PE1DDR PE0DDR
W
7
0
W
6
0
Abbreviation
PEDDR
PEDR
PORTE
PEPCR
W
5
0
W
4
0
Rev. 6.00 Feb 22, 2005 page 279 of 1484
R/W
R/W
R
W
R/W
W
3
0
Initial Value
H'00
H'00
Undefined
H'00
W
2
0
Section 9 I/O Ports
REJ09B0103-0600
W
1
0
Address *
H'FE3D
H'FF0D
H'FFBD
H'FE44
W
0
0
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