± 2g / 4g / 8g / 16g Tri-axis Digital
Accelerometer Technical
Reference Manual
PART NUMBER:
KX132-1211
Rev. 1.0
31-Jul-2019
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Double-Tap Detection
An event can be characterized as a double tap if the second tap crosses the performance index (TTL) inside the TWS
period and ends outside the TDTC. This means that the TDTC determines the minimum time separation that must exist
between the two taps of a double tap event. Similar to the single tap, the first tap event must exceed the performance
index for the time limit contained in FTD. Also, the duration when the first and second events combined exceed the
performance index should not exceed STD. The double tap will be reported at the end of the second TLT. Figure 19
shows a double tap event meeting the PI, latency and window requirements.
Figure 19:
Double Directional-Tap
TM
Timing
