Atmel SAM4L Xplained Pro Evaluation Kit Atmel ATSAM4L-XPRO ATSAM4L-XPRO データシート
製品コード
ATSAM4L-XPRO
994
42023E–SAM–07/2013
ATSAM4L8/L4/L2
38. ADC Interface (ADCIFE)
Rev. 1.0.0.0
38.1
Features
•
Multi-channel Analog-to-Digital Converter with 12-bit resolution
•
Selectable single ended or differential input voltage
•
Programmable gain per conversion
•
selectable ADC voltage input reference per conversion
•
Numerous trigger sources
– Software
– Embedded 16-bit timer for periodic trigger
– Continuous trigger
– Peripheral Event trigger
– External trigger, rising, falling or any-edge trigger
•
Multiple sequencer modes:
– Run multiple sequences using DMA transfer
– Run a single conversion on a start-of-conversion
•
Start of conversion or sequence without CPU intervention
•
ADC Power Reduction Mode for low power ADC applications
•
Window monitor, with selectable channel per conversion
•
Programmable Sample & Hold time per conversion
38.2
Overview
The ADC interface (ADCIFE) converts analog input voltages to digital values. The ADCIFE is
based on a 12-bit Cyclic Pipeline topology to achieve sampling rates up to 300 KSPS (In differ-
ential mode without gain).
based on a 12-bit Cyclic Pipeline topology to achieve sampling rates up to 300 KSPS (In differ-
ential mode without gain).
The ADC conversion results are reported in a common register for all channels. Conversions
can be started for all enabled channels, either by a software trigger, by detection of a level
change on the external trigger pin or event system, or by an integrated programmable 16-bit
timer.
can be started for all enabled channels, either by a software trigger, by detection of a level
change on the external trigger pin or event system, or by an integrated programmable 16-bit
timer.
This ADC has selectable single-ended or fully differential inputs and takes benefits from a pro-
grammable gain from x0.5 to x64 included.
grammable gain from x0.5 to x64 included.
The conversions extend from -Vref to +Vref. 16 external channels on both positive and negative
inputs can be managed.
inputs can be managed.
The ADCIFE also integrates an Power Reduction mode, a Window Monitor mode, and connects
with two Peripheral DMA Controller channels (One Rx for configuration and one Tx for transfer-
ing results). These features reduce both power consumption and processor intervention.
with two Peripheral DMA Controller channels (One Rx for configuration and one Tx for transfer-
ing results). These features reduce both power consumption and processor intervention.