LM3S818 Luminary Micro, Inc, LM3S818 Datasheet - Page 129

• Manufacturer Part Number: LM3S818
• Description: Lm3s818 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

February 6, 2007
Reset
Reset
Type
Type
Bit/Field
31:8
GPIO Pull-Down Select (GPIOPDR)
Offset 0x514
7:0
RO
RO
31
15
0
0
Register 16: GPIO Pull-Down Select (GPIOPDR), offset 0x514
The GPIOPDR register is the pull-down control register. When a bit is set to 1, it enables a weak
pull-down resistor on the corresponding GPIO signal. Setting a bit in GPIOPDR automatically
clears the corresponding bit in the GPIO Pull-Up Select (GPIOPUR) register (see page 128).
RO
RO
30
14
0
0
reserved
Name
PDE
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
0x00
0
RO
RO
25
0
9
0
Preliminary
Description
Reserved bits return an indeterminate value, and should never
be changed.
Pad Weak Pull-Down Enable
A write of 1 to
GPIOPDR
clock cycle after the write.
RO
RO
24
0
8
0
reserved
R/W
RO
23
0
7
0
[n] enables. The change is effective on the second
GPIOPUR
R/W
RO
22
0
6
0
R/W
RO
21
0
5
0
[n] clears the corresponding
R/W
RO
20
0
4
0
PDE
R/W
RO
19
0
3
0
LM3S818 Data Sheet
R/W
RO
18
0
2
0
R/W
RO
17
0
1
0
R/W
RO
16
0
0
0
129