Sony CXD5602 User Manual page 266

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Figure SCU (Sensor Control Unit)-64 2nd Order IIR Filter Internal Data Flow
3.9.7.3.2 Normalization Processing
The normalization processing performs simplified conversion of multiple axis (2 axis/3 axis) data to single axis
values.
The square sum of each axis becomes a circle when the two axes have the same values, and becomes a sphere
when the three axes have the same value. However, in normalization processing, the values are calculated as
approximates to a rectangular octagon when converting from two axes.

1st order The absolute value of the input is output as-is
Output = |x|

2nd order
Output = 123/128 x Max(|x|,|y|) + 51/128 x Min(|x|,|y|)

3rd order
L1 = 120/128 x Max(|x|,|y|) + 49/128 x Min(|x|,|y|)
Output = Max(L1,|z|) + 44/128 x Min(L1,|z|)
Figure SCU (Sensor Control Unit)-65 shows the data flow of normalization processing.
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Figure SCU (Sensor Control Unit)-65 Normalization Processing Data Flow
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CXD5602 User Manual
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