2.5

Ranging mode description

The VL53L4CX dedicated operating mode is “Ranging mode”. In this mode the software driver proposes turnkey

functionalities to allow fast and easy ranging in all customer applications.

•

Ranging mode is natively immune to coverglass crosstalk and smudge beyond 80 cm.

•

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 VL53L4CX, at each ranging operation. This

handshake is mandatory to ensure the right result is read by the host to continue the ranging operation.

Refer to Section 2.10 Handshake management for further details.

2.6

Digital processing and reading the results

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 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 device 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 in the VL53L4CX user manual (UM2923).

VL53L4CX

Ranging mode description

DS13805 - Rev 3

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