HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 302
HD6412240
Manufacturer Part Number
HD6412240
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412240.pdf
(818 pages)
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Section 8 I/O Ports
8.10.2
Table 8.17 shows the port D register configuration.
Table 8.17 Port D Registers
Name
Port D data direction register
Port D data register
Port D register
Port D MOS pull-up control register
Note:
Port D Data Direction Register (PDDDR)
PDDDR is an 8-bit write-only register, the individual bits of which specify input or output for the
pins of port D. PDDDR cannot be read; if it is, an undefined value will be read.
This register is a write-only register, and cannot be written by bit manipulation instruction. For
details, see section 2.10.4, Access Methods for Registers with Write-Only Bits.
PDDDR is initialized to H'00 by a power-on reset, and in hardware standby mode. It retains its
prior state after a manual reset, and in software standby mode.
Rev.3.00 Mar. 26, 2007 Page 260 of 772
REJ09B0355-0300
Bit
Initial value
R/W
Modes 1, 2, 4, 5, and 6
The input/output direction specification by PDDDR is ignored, and port D is automatically
designated for data I/O.
Note: Modes 2 and 6 cannot be used in the H8S/2240.
Modes 3 and 7
Setting a PDDDR bit to 1 makes the corresponding port D pin an output port, while clearing
the bit to 0 makes the pin an input port.
Note: Modes 3 and 7 cannot be used in the H8S/2240.
* Lower 16 bits of the address.
Register Configuration
:
:
:
PD7DDR
W
7
0
PD6DDR
W
6
0
PD5DDR
PDDDR
PDPCR
Abbreviation
PDDR
PORTD
W
5
0
PD4DDR
W
4
0
PD3DDR
R/W
W
R/W
R
R/W
W
3
0
PD2DDR
Initial Value
H'00
H'00
Undefined
H'00
W
2
0
PD1DDR
W
1
0
Address*
H'FEBC
H'FF6C
H'FF5C
H'FF73
PD0DDR
W
0
0
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