22 Analog Comparators
An analog comparator is a peripheral that compares two analog voltages and provides a logical
output that signals the comparison result.
Note: Not all comparators have the option to drive an output pin. See “Signal
Description” on page 1654 for more information.
The comparator can provide its output to a device pin, acting as a replacement for an analog
comparator on the board. In addition, the comparator can signal the application via interrupts or
trigger the start of a sample sequence in the ADC. The interrupt generation and ADC triggering logic
is separate and independent. This flexibility means, for example, that an interrupt can be generated
on a rising edge and the ADC triggered on a falling edge.
The TM4C1294NCPDT microcontroller provides three independent integrated analog comparators
with the following functions:
■ Compare external pin input to external pin input or to internal programmable voltage reference
■ Compare a test voltage against any one of the following voltages:
– An individual external reference voltage
– A shared single external reference voltage
– A shared internal reference voltage
1653June 18, 2014
Texas Instruments-Production Data
Tiva
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TM4C1294NCPDT Microcontroller
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