LM3S610 Data Sheet
October 8, 2006 129
Preliminary
Register 15: GPIO Pull-Up Select (GPIOPUR), offset 0x510
The GPIOPUR register is the pull-up control register. When a bit is set to 1, it enables a weak
pull-up resistor on the corresponding GPIO signal. Setting a bit in GPIOPUR automatically clears
the corresponding bit in the GPIO Pull-Down Select (GPIOPDR) register (see page 130).
Bit/Field Name Type Reset Description
31:8 reserved RO 0 Reserved bits return an indeterminate value, and should never
be changed.
7:0 PUE R/W 0xFF Pad Weak Pull-Up Enable
A write of 1 to
GPIOPDR[n] clears the corresponding
GPIOPUR[n] enables. The change is effective on the second
clock cycle after the write.
reserved
RO
0
GPIO Pull-Up Select (GPIOPUR)
Offset 0x510
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reset
Type
000000000000000
RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO
RO
0
Reset
Type
000000011111111
RO RO RO RO RO RO RO R/W R/W R/W R/W R/W R/W R/W R/W
reserved
PUE