LM3S610_06 Datasheet, PDF (130/396 Pages) List of Unclassifed Manufacturers – Microcontroller

General-Purpose Input/Outputs (GPIOs)
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 129).
GPIO Pull-Down Select (GPIOPDR)
Offset 0x514
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved
Type
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
PDE
Type
RO
RO
RO
RO
RO
RO
RO
RO
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:8
7:0
Name
reserved
PDE
Type
RO
R/W
Reset
0
0x00
Description
Reserved bits return an indeterminate value, and should never
be changed.
Pad Weak Pull-Down Enable
A write of 1 to GPIOPUR[n] clears the corresponding
GPIOPDR[n] enables. The change is effective on the second
clock cycle after the write.
130
October 8, 2006
Preliminary