IIS2ICLX datasheet(6/119 Pages) STMICROELECTRONICS

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2.2

Machine learning core

The IIS2ICLX embeds a dedicated core for machine learning processing that provides system flexibility, allowing

some algorithms run in the application processor to be moved to the MEMS sensor with the advantage of

consistent reduction in power consumption.

Machine learning core logic allows identifying if a data pattern (for example motion, pressure, temperature,

magnetic data, and so forth) matches a user-defined set of classes. Typical examples of applications could be

anomalous vibration recognition, complex movement, or condition identification, activity detection, and so forth.

The IIS2ICLX machine learning core works on data patterns coming from the accelerometer, but it is also possible

to connect and process external sensor data (from a gyroscope or additional external inclinometer/accelerometer,

temperature or pressure sensors) by using the sensor hub feature (mode 2).

The input data can be filtered using a dedicated configurable computation block containing filters and features

computed in a fixed time window defined by the user.

Machine learning processing is based on logical processing composed of a series of configurable nodes

characterized by "if-then-else" conditions where the "feature" values are evaluated against defined thresholds.

Figure 3. Machine learning core in the IIS2ICLX

INPUT

Sensor Data & Hub

Machine

Learning Core

OUTPUT

Accelerometer

Results

External Sensor

Features

Filters

Interrupts

Machine

Learning Core

Logical processing

The IIS2ICLX can be configured to run up to 8 flows simultaneously and independently and every flow can

generate up to 256 results. The total number of nodes can be up to 512.

The results of the machine learning processing are available in dedicated output registers readable from the

application processor at any time.

The IIS2ICLX machine learning core can be configured to generate an interrupt when a change in the result

occurs.

IIS2ICLX

Machine learning core

DS13005 - Rev 7

page 6/119

IIS2ICLX 데이터시트(PDF) 6 Page - STMicroelectronics