Introduction
The purpose of this user manual is to describe the main functions of the VL53L1X ultra lite driver (ULD) to program the
VL53L1X sensor for ranging distances and detecting objects.
The VL53L1X ULD is an optimized version of the initial VL53L1X driver. The table below indicates the main differences between
the two drivers. For example, in the the VL53L1X ULD, the API contains only four files instead of 35, and the code footprint is
much smaller (2.3 KB vs. 9 KB in Flash).
The VL53L1X is the third generation of long distance ranging, Time-of-Flight sensors. Please refer to the VL53L1X datasheet for
more details.
Figure 1. VL53L1X sensor module
Table 1. Main differences between VL53L1X API and VL53L1X ULD API
VL53L1X API VL53L1X ULD API
Code footprint in Flash 9 KB 2.3 KB
Number of files 35 4
Timing budget (ms) [20 - 500] [15, 20, 33, 50, 100, 200, 500]
ROI position configuration Flexible (center and corner) Centered only
Fast ranging 100 Hz Yes No (66 Hz max.)
Dynamic SPAD selection (DSS)
(1)
No Yes
1. DSS is an internal operation which consists of adapting dynamically the number of active SPADs according to the quantity of returned
photons. This avoids saturating the SPAD receiver. DSS is executed at the beginning of each ranging operation.
A guide to using the VL53L1X ultra lite driver
UM2510
User manual
UM2510 - Rev 1 - December 2018
For further information contact your local STMicroelectronics sales office.
www.st.com
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