LM3S3749 Luminary Micro, Inc, LM3S3749 Datasheet - Page 260
LM3S3749
Manufacturer Part Number
LM3S3749
Description
Lm3s3749 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S3749.pdf
(753 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM3S3749-IQC50-A0
Manufacturer:
Texas Instruments
Quantity:
10 000
Company:
Part Number:
LM3S3749-IQC50-A0T
Manufacturer:
Texas Instruments
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Reset
Reset
Type
Type
General-Purpose Input/Outputs (GPIOs)
GPIO Direction (GPIODIR)
GPIO Port A (legacy) base: 0x4000.4000
GPIO Port A (high-speed) base: 0x4005.8000
GPIO Port B (legacy) base: 0x4000.5000
GPIO Port B (high-speed) base: 0x4005.9000
GPIO Port C (legacy) base: 0x4000.6000
GPIO Port C (high-speed) base: 0x4005.A000
GPIO Port D (legacy) base: 0x4000.7000
GPIO Port D (high-speed) base: 0x4005.B000
GPIO Port E (legacy) base: 0x4002.4000
GPIO Port E (high-speed) base: 0x4005.C000
GPIO Port F (legacy) base: 0x4002.5000
GPIO Port F (high-speed) base: 0x4005.D000
GPIO Port G (legacy) base: 0x4002.6000
GPIO Port G (high-speed) base: 0x4005.E000
GPIO Port H (legacy) base: 0x4002.7000
GPIO Port H (high-speed) base: 0x4005.F000
Offset 0x400
Type R/W, reset 0x0000.0000
260
Bit/Field
31:8
7:0
RO
RO
31
15
0
0
RO
RO
Register 2: GPIO Direction (GPIODIR), offset 0x400
The GPIODIR register is the data direction register. Bits set to 1 in the GPIODIR register configure
the corresponding pin to be an output, while bits set to 0 configure the pins to be inputs. All bits are
cleared by a reset, meaning all GPIO pins are inputs by default.
30
14
0
0
RO
RO
29
13
reserved
0
0
Name
DIR
RO
RO
28
12
0
0
reserved
RO
RO
27
11
0
0
Type
R/W
RO
RO
RO
26
10
0
0
RO
RO
Reset
25
0x00
0x00
0
9
0
Preliminary
RO
RO
24
0
8
0
reserved
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.
GPIO Data Direction
The DIR values are defined as follows:
Value
0
1
R/W
RO
23
0
7
0
Description
Pins are inputs.
Pins are outputs.
R/W
RO
22
0
6
0
R/W
RO
21
0
5
0
R/W
RO
20
0
4
0
DIR
R/W
RO
19
0
3
0
R/W
RO
18
0
2
0
R/W
RO
17
0
1
0
June 02, 2008
R/W
RO
16
0
0
0
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