LM3S2671 Datasheet, PDF (46/764 Pages) Texas Instruments – Stellaris® LM3S2671 Microcontroller

Architectural Overview
1.4.3
1.4.3.1
1.4.3.2
1.4.4
Fault Pin (see page 653)
The LM3S2671 PWM module includes one fault-condition handling input to quickly provide low-latency
shutdown and prevent damage to the motor being controlled.
Analog Peripherals
To handle analog signals, the LM3S2671 microcontroller offers an Analog-to-Digital Converter
(ADC).
For support of analog signals, the LM3S2671 microcontroller offers three analog comparators.
ADC (see page 433)
An analog-to-digital converter (ADC) is a peripheral that converts a continuous analog voltage to a
discrete digital number.
The LM3S2671 ADC module features 10-bit conversion resolution and supports four input channels,
plus an internal temperature sensor. Four buffered sample sequences allow rapid sampling of up
to eight analog input sources without controller intervention. Each sample sequence provides flexible
programming with fully configurable input source, trigger events, interrupt generation, and sequence
priority.
Analog Comparators (see page 634)
An analog comparator is a peripheral that compares two analog voltages, and provides a logical
output that signals the comparison result.
The LM3S2671 microcontroller provides three independent integrated analog comparators that can
be configured to drive an output or generate an interrupt or ADC event.
A comparator can compare a test voltage against any one of these voltages:
■ An individual external reference voltage
■ A shared single external reference voltage
■ A shared internal reference voltage
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 or triggers to the
ADC to cause it to start capturing a sample sequence. The interrupt generation and ADC triggering
logic is separate. This means, for example, that an interrupt can be generated on a rising edge and
the ADC triggered on a falling edge.
Serial Communications Peripherals
The LM3S2671 controller supports both asynchronous and synchronous serial communications
with:
■ One fully programmable 16C550-type UART
■ One SSI module
■ One I²C module
■ One CAN unit
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November 17, 2011
Texas Instruments-Production Data