VL53L1 datasheet(12/39 Pages) STMICROELECTRONICS

Part #	VL53L1

Description	New generation Time-of-Flight ranging sensor with advanced multi-zone and multi-object detection

PDF	39 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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12 / 39 page

Functional description

VL53L1

12/39

DocID029631 Rev 12

2.8

Power sequence

2.8.1

Power-up and boot sequence

There are two options available for device power-up/boot.

Option 1: the XSHUT pin is connected and controlled from the host.

This option optimizes power consumption as the VL53L1 can be completely powered off

when not used, and then woken up through the host GPIO (using the XSHUT pin).

HW standby mode is defined as the period when AVDD is present and XSHUT is low.

Figure 6. Power-up and boot sequence

1. tBOOT is 1.2ms max.

Option 2: the XSHUT pin is not controlled by the host, it is tied to AVDD through the pull-up

resistor.

When the XSHUT pin is not controlled, the power-up sequence is presented in Figure 7. In

this case, the device goes automatically to SW STANDBY after FW BOOT, without entering

HW STANDBY.

Figure 7. Power-up and boot sequence with XSHUT not controlled

1. tBOOT is 1.2 ms max.

Note:

In all cases, XSHUT has to be raised only when AVDD is tied on.

VL53L1 Datasheet(PDF) 12 Page - STMicroelectronics