Port B Data Register (Pbdr); Port B Register (Portb) - Renesas H8S Series Hardware Manual

Section 9 I/O Ports
9.5.2

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
7 PB7DR
6 PB6DR
5 PB5DR
4 PB4DR
3 PB3DR
2 PB2DR
1 PB1DR
0 PB0DR
9.5.3

Port B Register (PORTB)

PORTB is an 8-bit read-only register that shows port B pin states.
PORTB cannot be modified.
Bit Bit Name
7 PB7
6 PB6
5 PB5
4 PB4
3 PB3
2 PB2
1 PB1
0 PB0
Note: * Determined by the states of pins PB7 to PB0.
Rev. 6.00 Mar 15, 2006 page 142 of 570
REJ09B0211-0600
Initial Value R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
Initial Value R/W
Undefined *
R
Undefined *
R
Undefined *
R
Undefined *
R
Undefined *
R
Undefined *
R
Undefined *
R
Undefined *
R
Description
Output data for a pin is stored when the pin is
specified as a general purpose I/O port.
Description
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 performed while PBDDR bits are cleared to 0, the
pin states are read.