Datasheet

Section 10A I/O Ports
(H8S/2633, H8S/2632, H8S/2631, H8S/2633R)
Page 378 of 1434 R01UH0166EJ0600 Rev. 6.00
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
10A.2.2 Register Configuration
Table 10A.2 shows the port 1 register configuration.
Table 10A.2 Port 1 Registers
Name Abbreviation R/W Initial Value Address
*
Port 1 data direction register P1DDR W H'00 H'FE30
Port 1 data register P1DR R/W H'00 H'FF00
Port 1 register PORT1 R Undefined H'FFB0
Note: * Lower 16 bits of the address.
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 power-on reset, and in hardware standby mode. It retains its
prior state by a manual reset or in software standby mode. Because PPG, TPU, DMAC, and PWM
are initialized at a manual reset, pin states are determined by P1DDR and P1DR.
Port 1 Data Register (P1DR)
Bit : 7 6 5 4 3 2 1 0
P17DR P16DR P15DR P14DR P13DR P12DR P11DR P10DR
Initial value : 0 0 0 0 0 0 0 0
R/W : R/W R/W R/W R/W R/W R/W R/W R/W
P1DR is an 8-bit readable/writable register that stores output data for the port 1 pins (P17 to P10).
P1DR is initialized to H'00 by a power-on reset, and in hardware standby mode. It retains its prior
state by a manual reset or in software standby mode.