Specifications

BMA180
Preliminary data sheet
Bosch Sensortec
Rev. 1.0 Page 43 / - proprietary information - 06 March 2009
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Specifications within this document are preliminary and subject to change without notice. Document is not intended for publication.
Slope interrupt is performed, if at least 1 axis is leading to an interrupt (OR-connection).
Slope criterion is determined from digital filter output and depends on bandwidth settings: for
example for slope_dur=01b and bandwidth=0111b (1.2kHz), 2*bandwidth=2.4ksamples/s leads
to reaction for interrupt activation of 3*417 µs = 1.25 ms and a minimum slope interrupt duration
of 3*417µs = 1.25ms.
If lower bandwidth is selected
i) the digitally filtered values (lower noise) are taken for the verification of
the any motion criterion and
ii) the time scale to evaluate the criterion is stretched. Thus adjusting the
bandwidth, the slope threshold, the slope duration as well as the full scale
range enables to tailor the sensitivity of the slope algorithm.