LSM6DS3US Datasheet, PDF (16/104 Pages) STMicroelectronics – iNEMO inertial module: always-on 3D accelerometer and 3D gyroscope

Embedded low-power features
2
Embedded low-power features
LSM6DS3US
The LSM6DS3US has been designed to be fully compliant with Android, featuring the
following on-chip functions:
 8 kbyte data buffering
– 4 kbyte FIFO + flexible 4 kbyte (FIFO or programmable)
– 100% efficiency with flexible configurations and partitioning
– possibility to store timestamp
 Event-detection interrupts (fully configurable):
– free-fall
– wakeup
– 6D orientation
– tap and double-tap sensing
– activity / inactivity recognition
 Specific IP blocks with negligible power consumption and high-performance:
– pedometer functions: step detector and step counters
– tilt (Android compliant, refer to Section 2.1: Tilt detection for additional info
– significant motion (Android compliant)
 Sensor hub
– up to 6 total sensors: 2 internal (accelerometer and gyroscope) and 4 external
sensors
 Data rate synchronization with external trigger for reduced sensor access and enhanced
fusion
2.1
Tilt detection
The tilt function helps to detect activity change and has been implemented in hardware
using only the accelerometer to achieve both the targets of ultra-low power consumption
and robustness during the short duration of dynamic accelerations.
It is based on a trigger of an event each time the device's tilt changes by an angle greater
than 35 degrees from the start position.
The tilt function can be used with different scenarios, for example:
a) Trigger when phone is in a front pants pocket and the user goes from sitting to
standing or standing to sitting;
b) Doesn’t trigger when phone is in a front pants pocket and the user is walking,
running or going upstairs.
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DocID028476 Rev 4