LM3S101_0610 Datasheet, PDF (102/300 Pages) List of Unclassifed Manufacturers – Microcontroller

General-Purpose Input/Outputs (GPIOs)
Table 8-1. GPIO Pad Configuration Examples (Continued)
Register Bit Value^a
Configuration
Digital Input/Output (UART)
1
X
0
1
?
?
?
?
?
?
Analog Input (Comparator)
0
0
0
0
0
0
X
X
X
X
Digital Output (Comparator)
1
X
0
1
?
?
?
?
?
?
a. X=Ignored (don’t care bit)
?=Can be either 0 or 1, depending on the configuration
Table 8-2. GPIO Interrupt Configuration Example
Pin 2 Bit Value^a
Register
Desired Interrupt
Event Trigger
7
6
5
4
3
2
1
0
GPIOIS
0=edge
1=level
X
X
X
X
X
0
X
X
GPIOIBE
0=single edge
1=both edges
X
X
X
X
X
0
X
X
GPIOIEV
0=Low level, or
negative edge
X
X
X
X
X
1
X
X
1=High level, or
positive edge
GPIOIM
0=masked
1=not masked
0
0
0
0
0
1
0
0
a. X=Ignored (don’t care bit)
102
October 5, 2006
Preliminary