VL6180X datasheet(13/79 Pages) STMICROELECTRONICS

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VL6180X

Functional description

2.1

System state diagram

Figure 8 describes the main operating states of the VL6180X. Hardware standby is the reset

state (GPIO0=0)(a). The device is held in reset until GPIO0 is de-asserted. Note that the

device will not respond to I2C communication in this mode. When GPIO0=1, the device

enters software standby after the internal MCU boot sequence has completed. Once in

software standby, ST recommended register initialization settings(b) can be applied along

with any required application specific register settings. Thereafter, the host can command

single-shot range or ALS measurements or alternatively program one of the continuous

operating modes where the device uses an internal timer to schedule measurements at

specified intervals. See Section 2.4.3: Interleaved mode.

Figure 8. System state diagram

Use of GPIO0 is optional

Please contact STMicroelectronics for the latest settings

Power off

Hardware

standby

Software

standby

Range

measurement

ALS

measurement

Continuous

modes(*)

AVDD on

GPIO0=0

AVDD off

AVDD on

GPIO0=1

GPIO0=0

AVDD off

als_start

range_start

done

mode=

continuous

start

stop

auto

MCU boot

(*) Device is placed in a low power state between measurements

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