HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 256
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
8.2.2
Table 8.2 shows the port 1 register configuration.
Table 8.2
Name
Port 1 data direction register
Port 1 data register
Port 1 register
Note:
Port 1 Data Direction Register (P1DDR)
P1DDR is an 8-bit write-only register, the individual bits of which specify input or output for the
pins of port 1. P1DDR 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.
P1DDR 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. As the TPU is initialized by a
manual reset, the pin states are determined by the P1DDR and P1DR specifications.
Whether the address output pins maintain their output state or go to the high-impedance state in a
transition to software standby mode is selected by the OPE bit in SBYCR.
Rev.3.00 Mar. 26, 2007 Page 214 of 772
REJ09B0355-0300
Bit
Initial value
R/W
Modes 1 to 3 and 7
The corresponding port 1 pins are output ports when P1DDR is set to 1, and input ports when
cleared to 0.
Note: Modes 2, 3, and 7 cannot be used in the H8S/2240.
* Lower 16 bits of the address.
Register Configuration
Port 1 Registers
:
:
:
P17DDR
W
7
0
P16DDR
W
6
0
P1DDR
Abbreviation
P1DR
PORT1
P15DDR
W
5
0
P14DDR
W
4
0
R/W
W
R/W
R
P13DDR
W
3
0
Initial Value
H'00
H'00
Undefined
P12DDR
W
2
0
P11DDR
W
1
0
Address*
H'FEB0
H'FF60
H'FF50
P10DDR
W
0
0
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