LM3S2918 Luminary Micro, Inc, LM3S2918 Datasheet - Page 189
LM3S2918
Manufacturer Part Number
LM3S2918
Description
Lm3s2918 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S2918.pdf
(533 pages)
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Reset
Reset
Type
Type
GPIO Pull-Down Select (GPIOPDR)
GPIO Port A base: 0x4000.4000
GPIO Port B base: 0x4000.5000
GPIO Port C base: 0x4000.6000
GPIO Port D base: 0x4000.7000
GPIO Port E base: 0x4002.4000
GPIO Port F base: 0x4002.5000
GPIO Port G base: 0x4002.6000
GPIO Port H base: 0x4002.7000
Offset 0x514
Type R/W, reset 0x0000.0000
July 26, 2008
Bit/Field
31:8
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 188).
RO
RO
30
14
0
0
reserved
RO
RO
29
13
0
0
Name
PDE
RO
RO
28
12
0
0
reserved
RO
RO
27
11
0
0
Type
R/W
RO
RO
RO
26
10
0
0
Reset
0x00
0x00
RO
RO
25
0
9
0
Preliminary
RO
RO
24
0
8
0
Description
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
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.
reserved
R/W
RO
23
0
7
0
R/W
RO
22
0
6
0
R/W
RO
21
0
5
0
R/W
RO
20
0
4
0
PDE
LM3S2918 Microcontroller
R/W
RO
19
0
3
0
R/W
RO
18
0
2
0
R/W
RO
17
0
1
0
R/W
RO
16
0
0
0
189
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