LM3S2965-IQN25-A0T ETC2 [List of Unclassifed Manufacturers], LM3S2965-IQN25-A0T Datasheet - Page 182
LM3S2965-IQN25-A0T
Manufacturer Part Number
LM3S2965-IQN25-A0T
Description
Microcontroller
Manufacturer
ETC2 [List of Unclassifed Manufacturers]
Datasheet
1.LM3S2965-IQN25-A0T.pdf
(542 pages)
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General-Purpose Input/Outputs (GPIOs)
GPIO Open Drain Select (GPIOODR)
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 0x50C
Type R/W, reset 0x0000.0000
182
Reset
Reset
Type
Type
Bit/Field
31:8
7:0
RO
RO
31
15
0
0
Register 14: GPIO Open Drain Select (GPIOODR), offset 0x50C
The GPIOODR register is the open drain control register. Setting a bit in this register enables the
open drain configuration of the corresponding GPIO pad. When open drain mode is enabled, the
corresponding bit should also be set in the GPIO Digital Input Enable (GPIODEN) register (see
page 186). Corresponding bits in the drive strength registers (GPIODR2R, GPIODR4R, GPIODR8R,
and GPIOSLR ) can be set to achieve the desired rise and fall times. The GPIO acts as an open
drain input if the corresponding bit in the GPIODIR register is set to 0; and as an open drain output
when set to 1.
When using the I
PB2 and PB3 should be set to 1 (see examples in “Initialization and Configuration” on page 164).
RO
RO
30
14
0
0
reserved
Name
ODE
RO
RO
29
13
0
0
RO
RO
28
12
0
0
2
reserved
C module, the GPIO Alternate Function Select (GPIOAFSEL) register bit for
RO
RO
Type
27
11
R/W
0
0
RO
RO
RO
26
10
0
0
Reset
0x00
0
RO
RO
25
0
9
0
Preliminary
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.
Output Pad Open Drain Enable
0: Open drain configuration is disabled.
1: Open drain configuration is enabled.
RO
RO
24
0
8
0
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
ODE
R/W
RO
19
0
3
0
R/W
RO
18
0
2
0
June 04, 2007
R/W
RO
17
0
1
0
R/W
RO
16
0
0
0
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