KXTIK-1004 Datasheet, PDF (42/54 Pages) List of Unclassifed Manufacturers – 2g/4g/8g Tri-axis Digital Accelerometer Specifications

± 2g / 4g / 8g Tri-axis Digital
Accelerometer Specifications
PART NUMBER:
KXTIK-1004
Rev. 2
Dec-2011
A WUF (WUF_TIMER) 8-bit raw unsigned value represents a counter that permits the user to qualify each
active/inactive state change. Note that each WUF Timer count qualifies 1 (one) user-defined ODR period
(OWUF). Equation 5 shows how to calculate the WUF_TIMER register value for a desired wake up delay
time.
WUF_TIMER (counts) = Wake Up Delay Time (sec) x OWUF (Hz)
Equation 5. Wake Up Delay Time
Figure 4 below shows the latched response of the motion detection algorithm with WUF Timer = 10 counts.
Typical Motion Interrupt Example
HPF Acceleration
WUF Threshold
0g
10
Ex: Delay Counter = 10
Motion
Inactive
WUF Timer
Figure 4. Latched Motion Interrupt Response
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