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VL53L8CH Datasheet(PDF) 21 Page - STMicroelectronics

No. de pieza VL53L8CH
Descripción Electrónicos  Artificial intelligence enabler, high performance 8x8 multizone Time-of-Flight (ToF) sensor
PDF  44 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
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VL53L8CH Datasheet(HTML) 21 Page - STMicroelectronics

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7
Histogram (CNH) output
Up to 6 KB of histogram data can be read by the host at every frame. Selection of what histogram data is placed
in this 6 KB data area is highly configurable, allowing the amount of the data transferred to be optimized for
different applications. The format of the collected histogram data is called compact normalized histogram (CNH):
•
Compact: Options are available to reduce the amount of data compared to the native “raw” histogram data
•
Normalized: Raw data are adjusted to compensate variations caused by frame-to-frame adjustments
•
Histogram: Primary data is in the form of histograms recording return-signal-strength vs range
Figure 21. Raw histogram (128 bins)
The sensor is highly configurable. The user can program the number of bins, bin width, and also the region-of-
interest. Ambient light level is measured during ranging, and is later removed from the histogram data. A record of
the ambient light level that was removed from each histogram is available in a separate area of the data result
buffer.
Data aggregation options during preprocessing include region-of-interest and subsampling operations both
spatially (zone based), and temporally (on histogram bins).
Table 16. ToF ranging core histogram characteristics
Parameter
Value
Units
Ranging core histogram bin width
250
ps
Ranging core histogram bin equivalent range
37.5
mm
Ranging core number of bins in histogram
128
bins
Table 17. CNH parameters
Setting
Value
Units
CNH buffer maximum size
6160
bytes
Bytes-per-histogram bin
5
bytes
Maximum zones per CNH aggregate
64
zones
Maximum histogram binning factor
8
—
Bytes-per-ambient level
5
bytes
Note:
Details of the CNH configuration options available can be found in the user manual UM3183.
VL53L8CH
Histogram (CNH) output
DS14310 - Rev 3
page 21/44



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