LM3S1110 Luminary Micro, Inc, LM3S1110 Datasheet - Page 158

• Manufacturer Part Number: LM3S1110
• Description: Lm3s1110 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

General-Purpose Input/Outputs (GPIOs)
Table 9-1. GPIO Pad Configuration Examples
a. X=Ignored (don’t care bit)
?=Can be either 0 or 1, depending on the configuration
Table 9-2. GPIO Interrupt Configuration Example
a. X=Ignored (don’t care bit)
9.3
158
Configuration
Digital Input (GPIO)
Digital Output (GPIO)
Open Drain Input
(GPIO)
Open Drain Output
(GPIO)
Digital Input (Timer
CCP)
Digital Output (Timer
PWM)
Digital Input/Output
(SSI)
Digital Input/Output
(UART)
Analog Input
(Comparator)
Digital Output
(Comparator)
Register
GPIOIS
GPIOIBE
GPIOIEV
GPIOIM
Desired
Interrupt
Event
Trigger
0=Low level,
1=High level,
or negative
0=masked
Register Map
Table 9-3 on page 159 lists the GPIO registers. The offset listed is a hexadecimal increment to the
register’s address, relative to that GPIO port’s base address:
or positive
0=single
masked
0=edge
1=level
1=both
edges
1=not
edge
edge
edge
GPIO Register Bit Value
AFSEL
0
0
0
0
1
1
1
1
0
1
Pin 2 Bit Value
7
X
X
X
0
DIR
X
X
X
X
X
0
1
0
1
0
6
a
ODR
X
X
X
0
a
0
0
1
1
0
0
0
0
0
0
5
DEN
X
X
X
0
Preliminary
1
1
1
1
1
1
1
1
0
1
PUR
4
?
?
X
X
?
?
?
?
0
?
X
X
X
0
PDR
3
?
?
X
X
?
?
?
?
0
?
X
X
X
0
DR2R
X
X
X
X
?
?
?
?
?
?
2
0
0
1
1
DR4R
X
X
X
X
?
?
?
?
?
?
1
DR8R
X
X
X
0
X
X
X
X
?
?
?
?
?
?
July 25, 2008
0
SLR
X
X
X
0
X
X
X
X
?
?
?
?
?
?