28. General Purpose I/O Ports (GPIO)
Rev.1.00 Jan. 10, 2008 Page 1440 of 1658
REJ09B0261-0100
28.2.39 Port N Pull-Up Control Register (PNPUPR) PNPUPR is an 8-bit readable/writable register that performs the pull-up control for each of the port N7 to N0 (PN7 to PN0) pins when the port N pins are used by peripheral modules. When the port N pins are used by the GPIO, the setting for this register is ignored.
01234567
11111111
PN0
PUPR
PN1
PUPR
PN2
PUPR
PN3
PUPR
PN4
PUPR
PN5
PUPR
PN6
PUPR
PN7
PUPR
R/WR/WR/WR/WR/WR/WR/WR/W
Bit:
Initial value:
R/W:
Bit Bit Name
Initial
value R/W Description
7 PN7PUPR 1 R/W
6 PN6PUPR 1 R/W
5 PN5PUPR 1 R/W
4 PN4PUPR 1 R/W
3 PN3PUPR 1 R/W
2 PN2PUPR 1 R/W
1 PN1PUPR 1 R/W
Pull-up of each Port N pin can be controlled
independently.
0: PNn pull-up off
1: PNn pull-up on
0 PN0PUPR 1 R/W
Note: n = 7 to 0