KXTF9-4100【PDF 45/49 页】IC ACCELEROMETER TRI-AXIS 10-LGA

PART NUMBER:

± 2g / 4g / 8g Tri-axis Digital

Accelerometer Specifications

KXTF9-4100

Rev. 6

Jun-2011

Directional Tap Detection Feature Description

The Directional Tap Detection feature of the KXTF9 recognizes single and double tap inputs and reports the

acceleration axis and direction that each tap occurred. Eight performance parameters, as well as a user-

selectable ODR are used to configure the KXTF9 for a desired tap detection response.

Performance Index

The Directional Tap TM detection algorithm uses low and high thresholds to help determine when a tap

event has occurred. A tap event is detected when the previously described jerk summation exceeds

the low threshold (TDT_L_THRESH) for more than the tap detection low limit, but less than the tap

detection high limit as contained in TDT_TAP_TIMER. Samples that exceed the high limit

(TDT_H_THRESH) will be ignored. Figure 5 shows an example of a single tap event meeting the

performance index criteria.

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tel: 607-257-1080 – fax:607-257-1146

www.kionix.com - info@kionix.com

425-2397-1106241613

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