2.2

State machine description

The following figure shows the device state machine.

Power Off

Host removes AVDD

Host applies AVDD

HW Standby

Host lowers XSHUT

Host raises XSHUT

SW Standby

Host clears interrupt

Next range starts

automatically after Host

has cleared the interrupt

Host initiates STOP

Continuous

Ranging

Initial Boot

Host initiates START

2.3

Customer manufacturing calibration flow

Up to calibrations are needed to ensure the best sensor performances. Offset needed in all applications. If a

cover glass is used, cross-talk calibration is needed also.

Two part-to-part calibrations are needed to ensure the best sensor performances, while one is optional. Offset and

RefSpad calibrations are needed in all applications.

If a cover glass is used, crosstalk calibration data are needed. The xtalk calibration data can be measured during

a part-to-part calibration in the customer production line, and stored in the host, as part-to-part calibration data.

Xtalk calibration data can also be computed from a xtalk characterization of few devices, not in production line,

and stored in the host as generic calibration data.

The detailed procedure is provided in the VL53L4CX user manual (UM2923).

2.4

Device programming and control

The device physical control interface is I²C, described in Section 3 Control interface.

A software layer (driver) is provided to control the device. This avoids complex I²C register operations with turnkey

functions to start, stop, and read the ranging values.

The driver structure and functions are described in the VL53L4CX user manual.

VL53L4CX

State machine description

DS13805 - Rev 3

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