LM3S101 Luminary Micro, Inc., LM3S101 Datasheet - Page 119
LM3S101
Manufacturer Part Number
LM3S101
Description
Microcontroller
Manufacturer
Luminary Micro, Inc.
Datasheet
1.LM3S101.pdf
(300 pages)
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October 5, 2006
Reset
Reset
Type
Type
Bit/Field
31:8
GPIO Pull-Up Select (GPIOPUR)
Offset 0x510
7:0
RO
RO
31
15
0
0
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 120).
RO
RO
30
14
0
0
reserved
Name
PUE
RO
RO
29
13
0
0
RO
RO
28
12
0
0
reserved
Type
R/W
RO
RO
RO
27
11
0
0
RO
RO
26
10
0
0
Reset
0xFF
0
RO
RO
25
0
9
0
Preliminary
Description
Reserved bits return an indeterminate value, and should never
be changed.
Pad Weak Pull-Up Enable
A write of 1 to
GPIOPUR
clock cycle after the write.
RO
RO
24
0
8
0
reserved
R/W
RO
23
0
7
1
[n] enables. The change is effective on the second
GPIOPDR
R/W
RO
22
0
6
1
R/W
RO
21
0
5
1
[n] clears the corresponding
R/W
RO
20
0
4
1
PUE
R/W
RO
19
0
3
1
LM3S101 Data Sheet
R/W
RO
18
0
2
1
R/W
RO
17
0
1
1
R/W
RO
16
0
0
1
119
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