Datasheet VL53L3CX (STMicroelectronics) - 8

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VL53L3CX Ranging mode description 2.5 Ranging mode description
The VL53L3CX dedicated operating mode (called “preset”) is “ranging mode”. In this mode, the software driver proposes turnkey to allow fast and easy ranging in all customer applications: Ranging mode is the configuration to get the best of the VL53L3CX functionalities. • Ranging mode is natively immune to cover glass crosstalk and smudge beyond 80 cm. With patented algorithms (direct ToF), a temporal filtering is possible to distinguish crosstalk from the object signal over long distances > 80 cm. A best-in-class ranging performance of 300 cm with the cover glass in place is now possible, and can be reached with any computation unlike other sensors on the market. • Ranging mode can detect several objects concurrently within the FoV. Up to four ranges can be output simultaneously by the software driver, to indicate an object's range. Check the latest software driver manual for further details. • Ranging operation is performed by default at 30 Hz once the driver function is called (typical ranging operation lasts 33 ms). It includes internal housekeeping, ranging and post-processing. Note: Ranging mode requires a handshake between the host and the VL53L3CX, at each ranging operation. This handshake is mandatory to ensure the right result is read by the host to continue the ranging operation. Please refer to Section 2.10 Handshake management.
2.6 Digital processing
Digital processing is the final operation of the ranging sequence that computes, validates or rejects a ranging measurement. Part of this processing is performed by the VL53L3CX internal Firmware and completed on the host processor running the software driver. At the end of digital processing, the ranging distance is computed by the VL53L3CX itself. If the distance cannot be measured (no target or weak signal), a corresponding status error code is generated and can be read by the host. A full description of the status errors is provided inside the device driver user manual.
2.7 Reading the results
The VL53L3CX software driver provides turnkey functions to read output results after the measurement: • Signal rate per object detected • Ranging distance per object detected • Min. and max. distances where object is located A full description is provided inside the device driver user manual.
DS13204
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Rev 2 page 8/35
Document Outline Cover image Features Application Description 1 Product overview 1.1 Technical specification 1.2 System block diagram 1.3 Device pinout 1.4 Application schematic 2 Functional description 2.1 System functional description 2.2 State machine description 2.3 Customer manufacturing calibration flow 2.4 Device programming and control 2.5 Ranging mode description 2.6 Digital processing 2.7 Reading the results 2.8 Power sequence 2.8.1 Power up and boot sequence 2.9 Ranging sequence 2.10 Handshake management 3 Control interface 3.1 I2C interface - timing characteristics 3.2 I2C interface - reference registers 4 Electrical characteristics 4.1 Absolute maximum ratings 4.2 Recommended operating conditions 4.3 Electrostatic discharge 4.4 Current consumption 4.5 Digital input and output 5 Ranging performances 5.1 Measurement conditions 5.2 Minimum ranging distance 5.3 Maximum ranging distance 5.4 Ranging accuracy 5.5 Ranging drift with temperature 6 Outline drawings 7 Laser safety considerations 8 Packaging and labeling 8.1 Product marking 8.2 Inner box labeling 8.3 Packing 8.4 Tape and outline drawing 8.5 Lead-free solder reflow process 8.6 Handling and storage precautions 8.6.1 Shock precaution 8.6.2 Part handling 8.6.3 Compression force 8.6.4 Moisture sensitivity level 8.7 Storage temperature conditions 9 Package information 10 Ordering information 11 Acronyms and abbreviations Revision history Contents