LM3S8971 Luminary Micro, Inc, LM3S8971 Datasheet - Page 180
LM3S8971
Manufacturer Part Number
LM3S8971
Description
Lm3s8971 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S8971.pdf
(602 pages)
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Reset
Reset
Type
Type
General-Purpose Input/Outputs (GPIOs)
GPIO Interrupt Event (GPIOIEV)
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 0x40C
Type R/W, reset 0x0000.0000
180
Bit/Field
31:8
7:0
RO
RO
31
15
0
0
Register 5: GPIO Interrupt Event (GPIOIEV), offset 0x40C
The GPIOIEV register is the interrupt event register. Bits set to High in GPIOIEV configure the
corresponding pin to detect rising edges or high levels, depending on the corresponding bit value
in the GPIO Interrupt Sense (GPIOIS) register (see page 178). Clearing a bit configures the pin to
detect falling edges or low levels, depending on the corresponding bit value in GPIOIS. All bits are
cleared by a reset.
RO
RO
30
14
0
0
reserved
RO
RO
29
13
0
0
Name
IEV
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.
GPIO Interrupt Event
The IEV values are defined as follows:
Value
reserved
0
1
R/W
RO
23
Description
Falling edge or Low levels on corresponding pins trigger
interrupts.
Rising edge or High levels on corresponding pins trigger
interrupts.
0
7
0
R/W
RO
22
0
6
0
R/W
RO
21
0
5
0
R/W
RO
20
0
4
0
IEV
R/W
RO
19
0
3
0
R/W
RO
18
0
2
0
July 26, 2008
R/W
RO
17
0
1
0
R/W
RO
16
0
0
0
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