Port 1 Data Register (P1Dr); Port 1 Register (Port1) - Hitachi H8S/2628 Hardware Manual

9.1.2

Port 1 Data Register (P1DR)

P1DR is an 8-bit readable/writable register that stores output data for port 1 pins.
Bit Bit Name Initial Value
7 P17DR 0
6 P16DR 0
5 P15DR 0
4 P14DR 0
3 P13DR 0
2 P12DR 0
1 P11DR 0
0 P10DR 0
9.1.3

Port 1 Register (PORT1)

PORT1 is an 8-bit read-only register that shows the pin states.
PORT1 cannot be modified.
Bit Bit Name Initial Value
7 P17 Undefined*
6 P16 Undefined*
5 P15 Undefined*
4 P14 Undefined*
3 P13 Undefined*
2 P12 Undefined*
1 P11 Undefined*
0 P10 Undefined*
Note:* Determined by the states of pins P17 to P10.
Rev. 1.0, 09/02, page 126 of 568
R/W Description
R/W Output data for a pin is stored when the pin is
specified as a general purpose I/O port.
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W Description
R If a port 1 read is performed while P1DDR bits are
set to 1, the P1DR values are read. If a port 1 read is
R
performed while P1DDR bits are cleared to 0, the pin
R
states are read.
R
R
R
R
R