LM3S328 Luminary Micro, Inc., LM3S328 Datasheet - Page 108

• Manufacturer Part Number: LM3S328
• Description: Microcontroller
• Manufacturer: Luminary Micro, Inc.

General-Purpose Input/Outputs (GPIOs)
108
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)
Open Drain Input/Output (I
Digital Input (Timer CCP)
Digital Output (Timer PWM)
Digital Input/Output (SSI)
Digital Input/Output (UART)
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
2
C)
0
0
0
0
1
1
1
1
1
Preliminary
X
X
X
7
0
X
X
X
X
X
0
1
0
1
X
X
X
6
0
0
0
1
1
1
0
0
0
0
5
X
X
X
0
1
1
1
1
1
1
1
1
1
Register Bit Value
Pin 2 Bit Value
X
X
X
?
?
?
?
?
?
X
X
X
4
0
X
X
X
?
?
?
?
?
?
3
X
X
X
0
a
a
X
X
X
?
?
?
?
?
?
2
0
0
1
1
X
X
X
?
?
?
?
?
?
October 8, 2006
X
X
X
1
0
X
X
X
?
?
?
?
?
?
X
X
X
0
0
X
X
X
?
?
?
?
?
?