33 port e pull-up control register (pepupr) – Renesas SH7781 User Manual
Page 1464
28. General Purpose I/O Ports (GPIO)
Rev.1.00 Jan. 10, 2008 Page 1434 of 1658
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.
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
7 to 4
—
All 1
R/W
Reserved
These bits are always read as 1, and the write value
should always be 1.
3
PE3PUPR
1
R/W
Pull-up of the Port E3 pin can be controlled
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.
0
PE0PUPR
1
R/W
Pull-up of the Port E0 pin can be controlled
independently.
0: PE0 pull-up off
1: PE0 pull-up on