± 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
67
of
73
Buffer Operation
The following diagrams illustrate the operation of the buffer conceptually. Actual physical implementation has been
abstracted to offer a simplified explanation of how the different buffer modes operate. Figure 22 represents a high-
resolution 3-axis sample within the buffer. Figure 23
– Figure 30 represent a 10-sample version of the buffer (for
simplicity), with Sample Threshold set to 8.
Regardless of the selected mode, the buffer fills sequentially, one byte at a time. Figure 22 shows one 6-byte data
sample.
Index
Byte
0
X_L
-- FIFO read pointer
1
X_H
2
Y_L
3
Y_H
4
Z_L
5
Z_H
buffer write pointer --
→
6
Figure 22:
One Buffer Sample
Regardless of the selected mode, the buffer fills sequentially, one sample at a time. The buffer write pointer shows
where the next sample will be written to the buffer.
Index
Sample
0
Data0
← FIFO read pointer
1
Data1
2
Data2
buffer write pointer →
3
4
5
6
7
← Sample Threshold
8
9
Figure 23:
Buffer Filling
