LM3S315 Luminary Micro, Inc., LM3S315 Datasheet - Page 120

• Manufacturer Part Number: LM3S315
• Description: Microcontroller
• Manufacturer: Luminary Micro, Inc.

General-Purpose Input/Outputs (GPIOs)
120
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 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
0
1
Preliminary
X
X
X
7
0
X
0
1
0
1
X
X
X
X
0
X
X
X
X
6
0
0
1
0
0
0
1
0
0
0
0
0
5
X
X
X
0
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
?
X
X
X
3
0
a
a
X
X
X
X
?
?
?
?
?
?
?
2
0
0
1
1
X
X
X
X
?
?
?
?
?
?
?
April 27, 2007
X
X
X
1
0
X
X
X
?
X
?
?
?
?
?
?
0
X
X
X
0
X
?
X
?
X
?
?
?
X
?
?