Rev 03 Jan 2013 19:42 | Page 7
Modes of Operation
Measurement
: Configures the accelerometer for measurement mode, in which acceleration is
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sampled continuously at the specified data rate.
Standby
: Configures the accelerometer for Standby. The device is non-operational and consumes
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only 10 nA.
Auto Sleep
: Configures the accelerometer for autosleep. When inactivity is detected, the
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accelerometer enters a low-power, low-bandwidth mode; when activity is detected, the
accelerometer enters measurement mode.
Wake Up
: Configures the accelerometer for wakeup mode. This is a low-power, low-bandwidth
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mode in which acceleration is sampled ~6 times per second, and the accelerometer sleeps to
conserve power between samples.
Meas Range
: select the desired full-scale measurement range.
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Data Rate (Hz)
: choose the desired output data rate from the pull-down list.
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Half BW
: select whether the anti-aliasing filter bandwidth is set to 1/2 ODR (wider bandwidth for
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given ODR) or 1/4 ODR (less susceptibility to aliasing, therefore improved signal integrity).
Low Noise Mode
: choose between Normal Mode (lowest power consumption), Low Noise Mode,
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and Ultralow Noise Mode (lowest noise).
Activity Configuration
✔ Activity Interrupt
: when checked, enables activity detection.
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THRESH_ACT [mg]
: specify the threshold, in mg, for activity detection.
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Time_Act [num]
: specifies the number of consecutive samples that must be above the activity
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threshold (THRESH_ACT) for an activity event.
Coupling
: selects between AC (Referenced) and DC (Absolute) activity detection.
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Temperature
