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AN2381 Datasheet(PDF) 35 Page - STMicroelectronics

Part # AN2381
Description  low voltage linear accelerometer
PDF  47 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2381 Datasheet(HTML) 35 Page - STMicroelectronics

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AN2381
Registers Description
35/47
5.5.3
DD_ACK (3Ah)
Direction Detection Acknowledge, dummy register. A read at this address allows the refresh
of the DD_SRC register and clears any DD interrupt signal.
5.5.4
DD_THSI_L (3Ch)
Direction Detection Internal Threshold, less significant bits.
5.5.5
DD_THSI_H (3Dh)
Direction Detection Internal Threshold, most significant bits.
The concatenation of DD_THSI_H and DD_THSI_L registers defines the inner/internal
threshold which is used by the LIS3LV02DL device for direction-detection (refer to
Figure 13). The threshold value is expressed over 16 bit as an unsigned number. In
particular 7FFFh corresponds to full-scale acceleration (i.e. either 2g or 6g depending on
the value of FS bit in CTRL_REG2). In case no hysteresis is desired, the inner and outer
thresholds must be equal.
The inner threshold should be lower than or equal to the outer one. Whenever the inner
thresholds is greater than the outer one, the hysteresis region will be null and the threshold
used to detect the tilt direction is DD_THSE_H & DD_THSE_L only.
5.5.6
DD_THSE_L (3Eh)
Direction Detection External Threshold, less significant bits.
5.5.7
DD_THSE_H (3Fh)
Direction Detection External Threshold, most significant bits.
xx
xx
xx
xx
THSI7
THSI6
THSI5
THSI4
THSI3
THSI2
THSI1
THSI0
THSI7, THSI0
Direction detection Internal Threshold Lsb
THSI15
THSI14
THSI13
THSI12
THSI11
THSI10
THSI9
THSI8
THSI15, THSI8
Direction detection Internal Threshold Msb
THSE7
THSE6
THSE5
THSE4
THSE3
THSE2
THSE1
THSE0
THSE7, THSE0
Direction detection External Threshold Lsb
THSE15
THSE14
THSE13
THSE12
THSE11
THSE10
THSE9
THSE8
THSE15, THSE8
Direction detection External Threshold Msb



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