D12320VF25IV Datasheet, PDF (385/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

9.2.2 Register Configuration
Table 9.2 shows the port 1 register configuration.
Table 9.2 Port 1 Registers
Name
Abbreviation R/W
Port 1 data direction register
P1DDR
W
Port 1 data register
P1DR
R/W
Port 1 register
PORT1
R
Note: * Lower 16 bits of the address.
Section 9 I/O Ports
Initial Value
H'00
H'00
Undefined
Address^*
H'FEB0
H'FF60
H'FF50
Port 1 Data Direction Register (P1DDR)
Bit
:
7
6
5
4
3
2
1
0
P17DDR P16DDR P15DDR P14DDR P13DDR P12DDR P11DDR P10DDR
Initial value :
0
0
0
0
0
0
0
0
R/W
:W
W
W
W
W
W
W
W
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.
Setting a P1DDR bit to 1 makes the corresponding port 1 pin an output pin, while clearing the bit
to 0 makes the pin an input pin.
P1DDR is initialized to H'00 by a reset, and in hardware standby mode. It retains its prior state in
software standby mode.
Rev.6.00 Sep. 27, 2007 Page 353 of 1268
REJ09B0220-0600