Renesas SH7781 用户手册
28. General Purpose I/O Ports (GPIO)
Rev.1.00 Jan. 10, 2008 Page 1434 of 1658
REJ09B0261-0100
REJ09B0261-0100
28.2.33
Port E Pull-Up Control Register (PEPUPR)
PEPUPR is an 8-bit readable/writable register that performs the pull-up control for each of the port
E3 and E0 (PE3 and PE0) pins when the pins are used by peripheral modules. When the port E
pins are used by the GPIO, the setting for this register is ignored.
E3 and E0 (PE3 and PE0) pins when the pins are used by peripheral modules. When the port E
pins are used by the GPIO, the setting for this register is ignored.
0
1
2
3
4
5
6
7
1
1
1
1
1
1
1
1
PE0
PUPR
—
—
PE3
PUPR
—
—
—
—
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 to 4
—
All 1
R/W
Reserved
These bits are always read as 1, and the write value
should always be 1.
should always be 1.
3
PE3PUPR
1
R/W
Pull-up of the Port E3 pin can be controlled
independently.
independently.
0: PE3 pull-up off
1: PE3 pull-up on
2 and 1 —
All 1
R/W
Reserved
These bits are always read as 1, and the write value
should always be 1.
should always be 1.
0
PE0PUPR
1
R/W
Pull-up of the Port E0 pin can be controlled
independently.
independently.
0: PE0 pull-up off
1: PE0 pull-up on