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Giải thích chi tiết về linh kiện  This document provides application information for the low-voltage 3-axis digital output
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Interrupt generation
AN2847
20/31
Doc ID 15136 Rev 2
5
Interrupt generation
The LIS331DLH can provide two interrupt signals and offers several possibilities for
personalizing these signals. The registers involved in the interrupt generation behavior are
CTRL_REG3, INT1_CFG, INT2_CFG, INT1_THS, INT2_THS, INT1_DURATION, and
INT2_DURATION.
The LIS331DLH interrupt signal can behave as Free-Fall, Wake-Up or 6D orientation
detection.
Whenever an interrupt condition is verified, the interrupt signal is generated and by reading
the INT1_SRC and INT2_SRC registers it is possible to detect which condition has
occurred.
5.1
Duration
The content of the duration registers set the minimum duration of the interrupt event to be
recognized. Duration steps and maximum values depend on the ODR chosen.
When in Normal mode, duration time is measured in N/ODR, where N is the content of the
duration register and ODR is 50, 100, 400, 1000 Hz.
When in low power mode, duration time is measured in N/ODRLP, where N is the content of
the duration register and ODRLP is 0.5, 1, 2, 5, 10 Hz.
Table 15.
Interrupt mode configuration
AOI
6D
Interrupt mode
0
0
OR combination of interrupt events
0
1
6 direction movement recognition
1
0
AND combination of interrupt events
1
1
6 direction position recognition
Table 16.
Duration LSB value in normal mode
ODR (Hz)
Duration LSB value (ms)
50
20
100
10
400
2.5
1000
1



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