LM3S818 Luminary Micro, Inc, LM3S818 Datasheet - Page 111

• Manufacturer Part Number: LM3S818
• Description: Lm3s818 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

February 6, 2007
GPIO pads and the control register settings required to achieve them. Table 8-2 shows how a
rising edge interrupt would be configured for pin 2 of a GPIO port.
Table 8-1. GPIO Pad Configuration Examples
a. X=Ignored (don’t care bit)
Table 8-2. GPIO Interrupt Configuration Example
a. X=Ignored (don’t care bit)
Digital Input (GPIO)
Digital Output (GPIO)
Open Drain Input (GPIO)
Open Drain Output (GPIO)
Digital Input (Timer CCP)
Digital Input (QEI)
Digital Output (PWM)
Digital Output (Timer PWM)
Digital Input/Output (SSI)
Digital Input/Output (UART)
Analog Input (Comparator)
Digital Output (Comparator)
Register
GPIOIS
GPIOIBE
GPIOIEV
GPIOIM
?=Can be either 0 or 1, depending on the configuration
Configuration
Desired Interrupt
1=High level, or
0=Low level, or
Event Trigger
0=single edge
negative edge
1=not masked
1=both edges
positive edge
0=masked
0=edge
1=level
0
0
0
0
1
1
1
1
1
1
0
1
Preliminary
X
X
X
7
0
X
X
X
X
X
X
X
0
1
0
1
0
X
X
X
6
0
0
0
1
1
0
0
0
0
0
0
0
0
5
X
X
X
0
1
1
1
1
1
1
1
1
1
1
0
1
Register Bit Value
Pin 2 Bit Value
X
X
?
?
?
?
?
?
?
?
0
?
X
X
X
4
0
X
X
?
?
?
?
?
?
?
?
0
?
3
X
X
X
0
a
a
X
X
X
X
X
?
?
?
?
?
?
?
2
0
0
1
1
LM3S818 Data Sheet
X
X
X
X
X
?
?
?
?
?
?
?
1
X
X
X
0
X
X
X
X
X
?
?
?
?
?
?
?
X
X
X
0
0
X
X
X
X
X
?
?
?
?
?
?
?
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