LM3S1N16 Datasheet, PDF (50/794 Pages) Texas Instruments – Stellaris® LM3S1N16 Microcontroller

Architectural Overview
1.3.5
1.3.5.1
– 2-mA, 4-mA, and 8-mA pad drive for digital communication; up to four pads can sink 18-mA
for high-current applications
– Slew rate control for the 8-mA drive
– Open drain enables
– Digital input enables
Analog
The LM3S1N16 microcontroller provides analog functions integrated into the device, including:
■ 10-bit Analog-to-Digital Converter (ADC) with eight analog input channels and a sample rate of
one million samples/second
■ Two analog comparators
■ Eight digital comparators
■ On-chip voltage regulator
The following provides more detail on these analog functions.
ADC (see page 506)
An analog-to-digital converter (ADC) is a peripheral that converts a continuous analog voltage to a
discrete digital number. The Stellaris ADC module features 10-bit conversion resolution and supports
eight input channels plus an internal temperature sensor. Four buffered sample sequencers allow
rapid sampling of up to eight analog input sources without controller intervention. Each sample
sequencer provides flexible programming with fully configurable input source, trigger events, interrupt
generation, and sequencer priority. The ADC module has a digital comparator function that allows
the conversion value to be diverted to a comparison unit that provides eight digital comparators.
The LM3S1N16 microcontroller provides one ADC module with the following features:
■ Eight analog input channels
■ Single-ended and differential-input configurations
■ On-chip internal temperature sensor
■ Maximum sample rate of one million samples/second
■ Optional phase shift in sample time programmable from 22.5º to 337.5º
■ Four programmable sample conversion sequencers from one to eight entries long, with
corresponding conversion result FIFOs
■ Flexible trigger control
– Controller (software)
– Timers
– Analog Comparators
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January 21, 2012
Texas Instruments-Production Data