3.8

Ranging sequence

Figure 8. Ranging sequence

Note:

API in the figure above means application programmable interface.

Note:

ttiming_budget is a parameter set by the user, using a dedicated driver function.

3.9

Handshake management

Once a ranging measurement is available, an interrupt is generated. The driver communicates this to the host as

a physical signal on the GPIO1 pin, which is then driven low. The former operating method is called a “hardware

interrupt”, and the latter is referred to as a “polling mode”.

Once the host reads the result, the driver clears the interrupt, and the ranging sequence can continue. If the

interrupt is not cleared, the ranging operation inside the device is on hold. The interrupt behavior allows good

synchronization between the device and the host. This avoids results being lost if the host is not available to

acquire or process the data.

It is strongly recommended to use the hardware interrupt pin to manage this handshake.

VL53L4ED

Functional description

DS14256 - Rev 3

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