HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 453
HD6412320
Manufacturer Part Number
HD6412320
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412320.pdf
(1302 pages)
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9.12.2
Table 9.22 shows the port E register configuration.
Table 9.22 Port E Registers
Name
Port E data direction register
Port E data register
Port E register
Port E MOS pull-up control register
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 in
software standby mode.
•
•
Bit
Initial value :
R/W
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 6, Bus Controller.
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.
Modes 4 to 6
Mode 7
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 Sep. 27, 2007 Page 423 of 1268
R/W
W
R/W
R
R/W
W
3
0
Initial Value
H'00
H'00
Undefined
H'00
W
2
0
Section 9 I/O Ports
REJ09B0220-0600
W
1
0
Address *
H'FEBD
H'FF6D
H'FF5D
H'FF74
W
0
0
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