Port B Data Register (Pbdr); Port B Register (Portb) - Hitachi H8S/2628 Hardware Manual

9.7.2

Port B Data Register (PBDR)

PBDR is an 8-bit readable/writable register that stores output data for the port B pins.
Bit Bit Name Initial Value
7 PB7DR 0
6 PB6DR 0
5 PB5DR 0
4 PB4DR 0
3 PB3DR 0
2 PB2DR 0
1 PB1DR 0
0 PB0DR 0
9.7.3

Port B Register (PORTB)

PORTB is an 8-bit read-only register that shows port B pin states.
Bit Bit Name Initial Value
7 PB7 0
6 PB6 0
5 PB5 0
4 PB4 0
3 PB3 0
2 PB2 0
1 PB1 0
0 PB0 0
Note:* Determined by the states of pins PB7 to PB0.
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 B read is performed while PBDDR bits are
set to 1, the PBDR values are read. If a port B read is
R
performed while PBDDR bits are cleared to 0, the pin
R
states are read.
R
R
R
R
R
Rev. 1.0, 09/02, page 143 of 568