ST X-NUCLEO-53L1A1 Manuale utente

March 2018 DocID031498 Rev 1 1/17

UM2359

User manual

Getting started with X-NUCLEO-53L1A1 long distance ranging ToF

sensor expansion board based on VL53L1X for STM32 Nucleo

Introduction

This document provides detailed hardware information on the X-NUCLEO-53L1A1

expansion board. This expansion board is compatible with the STM32 Nucleo family and the

Arduino™ electronic boards. It is designed around the VL53L1X ranging sensor and is

based on the ST patented FlightSense™ technology.

To allow the user to validate the VL53L1X in an environment as close as possible to its final

application, the X-NUCLEO-53L1A1 expansion board is delivered with a holder in which

three different height spacers of 0.25, 0.5, and 1 mm can be fitted with the cover glass

above the spacer. The height spacers are used to simulate different air gap distances

between the VL53L1X sensor and the cover glass.

The X-NUCLEO-53L1A1 expansion board is delivered with two VL53L1X breakout boards.

Figure 1. X-NUCLEO-53L1A1 expansion board, spacers, cover glass, and breakout

boards

www.st.com

Contents UM2359

2/17 DocID031498 Rev 1

Contents

1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Document references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 X-NUCLEO-53L1A1 expansion board . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3.2 Electrical schematic and list of materials . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2.1 Electrical schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2.2 List of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.3 Solder drop configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.4 Integrated device pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4 VL53L1X breakout board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1 Electrostatic precaution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.2 Laser considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

DocID031498 Rev 1 3/17

UM2359 Overview

1 Overview

The X-NUCLEO-53L1A1 expansion board features the VL53L1X ranging sensor, based on

ST’s FlightSense™, Time-of-Flight (ToF) technology.

It is compatible with the STM32 Nucleo development board family, and with the Arduino

UNO R3 connector layout.

Several ST expansion boards can be stacked through the Arduino connectors, which

allows, for example, the development of VL53L1X applications with Bluetooth or Wi-Fi

interfaces.

The X-NUCLEO-53L1A1 expansion board is delivered with:

•Three spacers of 0.25, 0.5, and 1 mm height, used to simulate different air gaps

between the VL53L1X and the cover glass.

•Two cover windows to simulate the integration of the VL53L1X into the customer’s final

product.

•Two VL53L1X breakout boards which can be plugged onto the X-NUCLEO-53L1A1

expansion board or connected through flying wires to the X-NUCLEO-53L1A1

expansion board.

•Two 10-pin connectors to enable the customer to connect the two breakout boards onto

the X-NUCLEO-53L1A1 expansion board.

Note: The VL53L1X is delivered with a liner to prevent potential foreign material from penetrating

inside the module holes during the assembly process. This liner must be removed at the

latest possible step during final assembly, before module calibration.

2 Document references

Table 1. Ordering information

Order code Description

X-NUCLEO-53L1A1 STM32 Nucleo expansion board - spacers and glass - two breakout boards

Table 2. Document references

Description DocID

VL53L1X datasheet DS12385

X-NUCLEO-53L1A1 data brief DB3479

P-NUCLEO-53L1A1 data brief DB3477

X-CUBE-53L1A1 data brief DB3523

Getting started with the X-CUBE-53L1A1 Time-of-Flight long distance ranging

sensor software expansion for STM32Cube UM2371

X-NUCLEO-53L1A1 expansion board UM2359

4/17 DocID031498 Rev 1

3 X-NUCLEO-53L1A1 expansion board

This section describes the X-NUCLEO-53L1A1 expansion board features and provides

useful information for understanding the electrical characteristics.

Figure 2. X-NUCLEO-53L1A1 expansion board schematic diagram

3.1 Overview

The board allows the user to test the VL53L1X functionality, to program it and to understand

how to develop an application using the VL53L1X. It integrates:

•2.8 V regulator to supply the VL53L1X

•Level translators to adapt the I/O level to the main board of the microcontroller

•Arduino UNO R3 connectors

•Optional VL53L1X breakout board connectors

•Solder drops to allow different configurations of the expansion board

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DocID031498 Rev 1 5/17

UM2359 X-NUCLEO-53L1A1 expansion board

It is fundamental to program a microcontroller to control the VL53L1X through the I2C bus.

The pplication software and an examples of the C-ANSI source code are available on

www.st.com/VL53L1X.

The X-NUCLEO-53L1A1 expansion board and STM32 Nucleo development board are

connected through the Arduino™ UNO R3 connectors CN5, CN6, CN8, and CN9 as shown

in Figure 3 and as described in Table 3 and Table 4.

The X-NUCLEO-53L1A1 must be plugged onto the STM32 Nucleo development board

through the Arduino™ UNO R3 connectors.

Figure 3. X-NUCLEO-53L1A1 expansion board connector layout

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X-NUCLEO-53L1A1 expansion board UM2359

6/17 DocID031498 Rev 1

Table 3. Left Arduino connector

number

VL53L1X

board

number

name

MCU

X-NUCLEO-53L1A1

expansion board function

CN6 power

1NC NC

2NCIOREF

Not used

3 NC RESET

Power 4 3V3 3V3 3.3 V supply

5 NC 5V Not used

Gnd 6 Gnd Gnd

Gnd

Gnd 7 Gnd Gnd

8NC VIN

Not used

CN8 analog

1NC PA0

2NC PA1

GPIO1 3 INT PA4

Interrupt signal from

VL53L1X on board soldered

device

4 NC PB0 Not used

GPIO1 5 INT* PC1 (1)

1. Depends on STM32 Nucleo board solder bridges, see details in Section 3.3: Solder drop configurations.

These interrupt signals are duplicated, but not used. This offers hardware connection flexibility in case of

conflict on the MCU interface management when the expansion board is used superimposed with other

expansion boards. In this case, remove the solder drop from the used interrupt and instead, fit the solder

drop in “NC”.

By default not used, interrupt

signal from VL53L1X on

board soldered device

6 NC PC0 Not used

DocID031498 Rev 1 7/17

UM2359 X-NUCLEO-53L1A1 expansion board

Table 4. Right Arduino connector

number

VL53L1X

board

number

name

MCU

X-NUCLEO-53L1A1 expansion

board function

CN5 digital

SCL 10 D15 PB8 I2C1_SCL

SDA 9 D14 PB9 I2C1_SDA

8 NC AVDD Not used

Gnd 7 Gnd Gnd Gnd

6INT_LPA5

Not used

5NCPA6

4NCPA7

3 NC PB6

GPIO1_L 2 INT_L* PC7

By default not used, interrupt signal

from optional VL53L1X left breakout

board (1)

1. These interrupt signals are duplicated, but not used by default. This offers hardware connection of the

breakout board VL53L1X interrupt signals and flexibility in case of conflict on the MCU interface

management when the expansion board is used superimposed with other expansion boards. In this case,

select, through a solder drop, the MCU port which is free.

GPIO1_L 1 INT_L PA9

By default not used, interrupt signal

from optional VL53L1X left breakout

board (1)

CN9 digital

8NCPA8

Not used7NCPB10

6 NC PB4

GPIO1_R 5 INT_R* PB5

By default not used, interrupt signal

from optional VL53L1X right breakout

board (1)

4 NC PB3 Not used

GPIO1_R 3 INT_R PA10

By default not used, interrupt signal

from optional VL53L1X right breakout

board (1)

2NCPA2

Not used

1NCPA3

X-NUCLEO-53L1A1 expansion board UM2359

8/17 DocID031498 Rev 1

3.2 Electrical schematic and list of materials

3.2.1 Electrical schematic

Figure 4. X-NUCLEO-53L1A1 expansion board schematic

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DocID031498 Rev 1 9/17

UM2359 X-NUCLEO-53L1A1 expansion board

3.2.2 List of materials

Table 5. List of materials

Components Value Reference Supplier Comments

VL53L1X application

C1, C3 100 nF X5R

Supply voltage decoupling

C2 4.7 µF X5R - 6.3 V

R1 47 k Interrupt output pull up

R2 47 k Reset input pull up

R66, R67 4.7 k SDA and SCL line pull up at 2.8 V

S1 VL53L1X ST ToF ranging sensor

VL53L1X breakout board interfaces

R20 47 k Left breakout board interrupt

output pull up

R21 47 k Left breakout board reset input

pull up

R22 47 k Right breakout board reset input

pull up

R23 47 k Right breakout board interrupt

output pull up

2.8 V regulator application

C8 10 µF X5R - 6.3 V Output voltage decoupling

C9 10 µF X5R - 6.3 V Input voltage decoupling

R35 49.9 k Feedback resistor bridge to set

the output voltage to 2.8 V

R43 20 k

U20 LD39050PUR ST Output programmable regulator

Level translator application

C4, C6, C11 100 nF 2.8 V decoupling capacitor

C5, C7, C13 100 nF

3.3 V decoupling capacitor

C12 1 µF X5R - 6.3V

R68, R69 4.7 k SDA and SCL line pull up at 3.3 V

U3, U9 TXS0108PWR TI For all signals except I2C

interface

U24 ST2329AQTR ST For I2C interface

Add-on feature

C10 100 nF Supply decoupling capacitor

R45 4.7 k Push-button pull up

R46 1 k Output pull up

R60 0 Delay time setting (def = 10 ms)

X-NUCLEO-53L1A1 expansion board UM2359

10/17 DocID031498 Rev 1

3.3 Solder drop configurations

Solder drops allow the following configurations of the X-NUCLEO-53L1A1 expansion board:

•If the developer wants to make an application with several expansion boards stacked

and there is:

– conflict with the microcontroller port allocation, the GPIO1 can be output on the

CN8/A4 (U17 fitted) of the Arduino connector. The default configuration is that

GPIO1 is output on the CN8/A2 (U14 fitted) of the Arduino connector.

– conflict on the I2C addresses, the addresses of the STMPE1600 can be modified

(the default addresses A2, A1, A0, 000, and 001).

•If the developer wants to connect breakout boards (see Figure 5) to the X-NUCLEO-

53L1A1 expansion board:

– the VL53L1X interrupt of the left breakout board can be output on the CN5/D9

(U10 fitted) or CN5/D8 (U11 fitted) of the Arduino connector. By default, the U10

and U11 are not fitted.

– the VL53L1X interrupt of the right breakout board can be output on the CN9/D4

(U15 fitted) or CN9/D2 (U18 fitted) of the Arduino connector. By default, the U15

and U18 are not fitted.

– the VL53L1X interrupts of the left and right breakout boards, GPIO1_L and

GPIO1_R, can be shared with the VL53L1X interrupt on the main board, GPIO1,

by fitting U7 and U8 solder drops. By default U7 and U8 are not fitted.

PB1 Push button

U22 TPS3838K33 TI Supervisory circuit

GPIO expander

C14, C15 100 nF Supply decoupling capacitor

Table 5. List of materials (continued)

Components Value Reference Supplier Comments

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