EFM32WG Datasheet, PDF (616/834 Pages) List of Unclassifed Manufacturers – The EFM32WG Wonder Gecko is the ideal choice for demanding 8-, 16-, and 32-bit energy sensitive applications.

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25 LESENSE - Low Energy Sensor Interface
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What?
Quick Facts
LESENSE is a low energy sensor interface
capable of autonomously collecting and
processing data from multiple sensors even
when in EM2. Flexible configuration makes
LESENSE a versatile sensor interface
compatible with a wide range of sensors and
measurement schemes.
Why?
Capability to autonomously monitor sensors
allows the EFM32WG to reside in a low
energy mode for long periods of time while
keeping track of sensor status and sensor
events.
How?
LESENSE is highly configurable and is
capable of collecting data from a wide range
of sensor types. Once the data is collected,
the programmable state machine, LESENSE
decoder, is capable of processing sensor
data without CPU intervention. A large result
buffer allows the chip to remain in EM2 for
long periods of time while autonomously
collecting data.
25.1 Introduction
LESENSE is a low energy sensor interface which utilizes on-chip peripherals to perform measurement
of a configurable set of sensors. The results from sensor measurements can be processed by the
LESENSE decoder, which is a configurable state machine with up to 16 states. The results can also be
stored in a result buffer to be collected by CPU or DMA for further processing.
LESENSE operates in EM2, in addition to EM1 and EM0, and can wake up the CPU on configurable
events.
25.2 Features
• Up to 16 sensors
• Autonomous sensor monitoring in EM0, EM1, and EM2
• Highly configurable decoding of sensor results
• Interrupt on sensor events
• Configurable enable signals to external sensors
• Circular buffer for storage of up to 16 sensor results.
• Support for multiple sensor types
• LC sensors
• Capacitive sensing
• General analog sensors
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
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