Renesas SH7781 用户手册
28. General Purpose I/O Ports (GPIO)
Rev.1.00 Jan. 10, 2008 Page 1419 of 1658
REJ09B0261-0100
28.2.18
Port B Data Register (PBDR)
PBDR is an 8-bit readable/writable register that stores port B data.
0
1
2
3
4
5
6
7
0
0
0
0
0
0
0
0
PB0DT
PB1DT
PB2DT
PB3DT
PB4DT
PB5DT
PB6DT
PB7DT
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit:
Initial value:
R/W:
Bit Bit
Name
Initial
Value R/W Description
Value R/W Description
7 PB7DT
0* R/W
6 PB6DT
0* R/W
5 PB5DT
0* R/W
4 PB4DT
0* R/W
3 PB3DT
0* R/W
2 PB2DT
0* R/W
These bits store output data of a pin which is used as a
general-purpose output port. When the pin functions as
a general-purpose output port, reading the port will read
out the value of the corresponding bit of this register.
general-purpose output port. When the pin functions as
a general-purpose output port, reading the port will read
out the value of the corresponding bit of this register.
When the pin functions as a general-purpose input port,
reading the port will read out the status of the
corresponding pin.
reading the port will read out the status of the
corresponding pin.
1 PB1DT
0 R/W
0 PB0DT
0 R/W
Note: * When the bus mode is set to DU via the bus mode pins (MODE11 and MODE12), the
pin is initially used as a general-purpose input, and the pin status is read from this
register.
register.