LM3S2730 Luminary Micro, Inc, LM3S2730 Datasheet - Page 352
LM3S2730
Manufacturer Part Number
LM3S2730
Description
Lm3s2730 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S2730.pdf
(423 pages)
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Analog Comparators
14
14.1
352
Analog Comparators
An analog comparator is a peripheral that compares two analog voltages, and provides a logical
output that signals the comparison result.
The LM3S2730 controller provides two independent integrated analog comparators that can be
configured to drive an output or generate an interrupt
Note:
A comparator can compare a test voltage against any one of these voltages:
■
■
■
The comparator can provide its output to a device pin, acting as a replacement for an analog
comparator on the board, or it can be used to signal the application via interrupts to cause it to start
capturing a sample sequence.
Block Diagram
Figure 14-1. Analog Comparator Module Block Diagram
An individual external reference voltage
A shared single external reference voltage
A shared internal reference voltage
Not all comparators have the option to drive an output pin. See the Comparator Operating
Mode tables in “Functional Description” on page 353 for more information.
internal
C0+
C1-
C1+
C0-
bus
ACREFCTL
Voltage
Ref
Preliminary
-ve input
+ve input
+ve input (alternate)
reference input
-ve input
+ve input
+ve input (alternate)
reference input
ACSTAT1
ACSTAT0
ACCTL1
ACCTL0
Comparator 1
Comparator 0
interrupt
interrupt
output
output
Interrupt Control
C1o
C0o
ACINTEN
interrupt
ACMIS
ACRIS
July 25, 2008
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