LM3S328 Luminary Micro, Inc., LM3S328 Datasheet - Page 196
LM3S328
Manufacturer Part Number
LM3S328
Description
Microcontroller
Manufacturer
Luminary Micro, Inc.
Datasheet
1.LM3S328.pdf
(359 pages)
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Analog-to-Digital Converter (ADC)
11
11.1
196
Analog-to-Digital Converter (ADC)
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. The ADC module contains a programmable
sequencer which allows for the sampling of multiple analog input sources without controller
intervention. Each sample sequence provides flexible programming with fully configurable input
source, trigger events, interrupt generation, and sequence priority.
The Stellaris ADC provides the following features:
Block Diagram
Figure 11-1. ADC Module Block Diagram
SS0 Interrupt
SS1 Interrupt
SS2 Interrupt
SS3 Interrupt
Comparator
GPIO (PB4)
Comparator
GPIO (PB4)
Comparator
GPIO (PB4)
Comparator
GPIO (PB4)
Eight analog input channels
Single-ended and differential-input configurations
Internal temperature sensor
Sample rate of 500 thousand samples/second
Four programmable sample conversion sequences from one to eight entries long, with
corresponding conversion result FIFOs
Flexible trigger control
–
–
–
Hardware averaging of up to 64 samples for improved accuracy
Timer
PWM
Timer
PWM
Timer
PWM
Timer
PWM
Controller (software)
Timers
GPIO
Trigger Events
ADCEMUX
ADCPSSI
SS3
SS2
SS1
SS0
Interrupt Control
Control / Status
ADCACTSS
ADCOSTAT
ADCUSTAT
ADCSSPRI
ADCRIS
ADCISC
ADCIM
Preliminary
ADCSSFSTAT0
ADCSSFSTAT1
ADCSSFSTAT2
ADCSSFSTAT3
ADCSSMUX0
ADCSSMUX1
ADCSSMUX2
ADCSSMUX3
ADCSSCTL0
ADCSSCTL1
ADCSSCTL2
ADCSSCTL3
Sequencer 0
Sequencer 1
Sequencer 2
Sequencer 3
Sample
Sample
Sample
Sample
Analog-to-Digital
ADCSSFIFO0
ADCSSFIFO1
ADCSSFIFO2
ADCSSFIFO3
FIFO Block
Converter
October 8, 2006
Analog Inputs
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