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.

VL53L3CX

Ranging mode description

DS13204 - Rev 2

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