± 2g / 4g / 8g / 16g Tri-axis Digital
Accelerometer Technical
Reference Manual
PART NUMBER:
KX132-1211
Rev. 1.0
31-Jul-2019
36 Thornwood Dr.
–
Ithaca, NY 14850
© 2019 Kionix
–
All Rights Reserved
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Page
70
of
73
In FIFO, Stream, and Trigger (after a trigger event has occurred) modes, the buffer continues filling sequentially after
the Sample Threshold
is reached. Sample accumulation after the buffer is full depends on the selected operation mode.
FIFO and Trigger modes stop accumulating samples when the buffer is full, and Stream mode begins discarding the
oldest data when new samples are accumulated.
Index
Sample
0
Data0
← FIFO read pointer
1
Data1
2
Data2
3
Data3
4
Data4
5
Data5
6
Data6
7
Data7
← Sample Threshold
8
Data8
9
Data9
Figure 28:
Buffer Full
After the buffer has been filled in Stream mode, the oldest samples are discarded when new samples are collected.
Note in Figure 29 how Data0 was thrown out to make room for Data10.
Index
Sample
0
Data1
← FIFO read pointer
1
Data2
2
Data3
3
Data4
4
Data5
5
Data6
6
Data7
7
Data8
← Sample Threshold
8
Data9
9
Data10
Figure 29:
Buffer Full – Additional Sample Accumulation in Stream Mode
