ST VL6180 Bedienungsanleitung

Introduction

This user manual provides detailed hardware information on the X-NUCLEO-6180A1 expansion board (see figure below). This

board is designed around the VL6180 proximity sensor and it is compatible with the STM32 Nucleo and Arduino Uno boards.

The document provides an introduction to the proximity sensing capabilities of the VL6180 module which is based on ST's

patented Time-of-Flight (ToF) technology. Several ST expansion boards can be superposed through the Arduino connectors,

which allow development of VL6180 applications with Bluetooth or WiFi interfaces.

Figure 1. X-NUCLEO-6180A1 expansion board

Table 1. Ordering information

Order code Description

X-NUCLEO-6180A1 X-NUCLEO-6180A1 expansion board for use with STM32 Nucleo board

References

• VL6180 datasheet: Time-of-Flight proximity sensor and IR emitter two-in-one module

• X-NUCLEO-6180A1 data brief: Proximity Time-of-Flight sensor expansion board based on VL6180 for STM32 Nucleo

How to use the VL6180 proximity sensor X-NUCLEO-6180A1 expansion board

with the STM32 Nucleo board

UM2657

User manual

UM2657 - Rev 1 - March 2020

For further information contact your local STMicroelectronics sales office.

www.st.com

1Hardware description

This section describes the X-NUCLEO-6180A1 expansion board features and provides information on the

electrical schematics.

Figure 2. X-NUCLEO-6180A1 expansion board block diagram

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Hardware description

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1.1 Board description

The X-NUCLEO-6180A1 expansion board allows the user to test the VL6180 functionality and program it. Also,

advice is given on how to develop an application using the VL6180. The X-NUCLEO-6180A1 expansion board

integrates:

• a 4-digit display to render the range value in mm

• a 2.8 V regulator to supply the VL6180

• two level shifters to adapt the I/O level to the microcontroller main board

• the necessary connectivity for the application

It is fundamental to program a microcontroller to control the VL6180 through the I2C bus and drive the 4-digit

display on-board. Application software and examples of C-ANSI source code are available on www.st.com/

VL6180.

The X-NUCLEO-6180A1 expansion board and STM32 Nucleo are connected through Arduino compatible

connectors CN5, CN6, CN8 and CN9 as shown and described in the figure and tables below.

The Arduino connectors on the STM32 Nucleo board support Arduino Uno revision 3.

Figure 3. Arduino connector layout

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Table 2. Arduino left connector on STM32 Nucleo board

CN number X-NUCLEO-6180A1

expansion board Pin number Pin name MCU pin X-NUCLEO-6180A1 expansion board

function

CN6 power

1 NC

VIO 2 VIO Level shifter reference (3.3 V)

3 NC

Power 4 3V3 3.3 V supply

5 NC

Gnd 6 Gnd Gnd Gnd

Gnd 7 Gnd Gnd Gnd

8 NC —

CN8 analog

1 NC

2 NC

GPIO1_B 3 INT_B PA4 Interrupt signal from X-NUCLEO-6180A1

bottom breakout plug-in

GPIO1 4 INT PB0 Interrupt signal from X-NUCLEO-6180A1 on-

board soldered device

GPIO1_B 5 INT_B* PC1 or PB9

(1)

Interrupt signal from X-NUCLEO-6180A1

bottom breakout plug-in

GPIO1 6 INT* PC1 or PB8

(1)

Interrupt signal from X-NUCLEO-6180A1 on-

board soldered device

1. Depends on Nucleo board solder bridges (see details on Nucleo board documentation). These interrupt signals are

duplicated, but not used which offers the hardware connection flexibility in case of a conflict on the MCU interface when the

expansion board is used superposed with other expansion boards. In such cases, remove the 0-ohm resistor from the

current interrupt and connect it in place of the “do not mount” resistor.

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Table 3. Arduino right connector on STM32 Nucleo board

CN number X-NUCLEO-6180A1

expansion board Pin number Pin name MCU pin X-NUCLEO-6180A1 expansion board

function

CN5 digital

SCL 10 D15 PB8 I2C1_SCL

SDA 9 D14 PB9 I2C1_SDA

8 NC

Gnd 7 Gnd Gnd Gnd

GPIO1_L 6 INT_L PA5 Interrupt signal from X-NUCLEO-6180A1 left

breakout plug-in

5 NC

4 NC

3 NC

2 NC

GPIO1_L 1 INT_L* PA9 Interrupt signal from X-NUCLEO-6180A1 left

breakout plug-in (1)

CN9 digital

8 NC

7 NC

6 NC

GPIO1_R 5 INT_R* PB5 Interrupt signal from X-NUCLEO-6180A1 right

breakout plug-in (1)

4 NC

GPIO1_R 3 INT_R PA10 Interrupt signal from X-NUCLEO-6180A1 right

breakout plug-in

2 NC

1 NC

1. These interrupt signals are duplicated, but not used which offers the hardware connection flexibility in case of a conflict on

the MCU interface when the expansion board is used superposed with other expansion boards. In such cases, remove the

0-ohm resistor from the current interrupt and connect it in place of the “do not mount” resistor.

The X-NUCLEO-6180A1 expansion board allows up to three VL6180 breakout boards to be connected to it (see

Figure 4. Connections of VL6180 breakout boards). This allows the development of applications that can control

up to four VL6180 devices.

The I2C bus is shared with the VL6180 on-board I2C bus. The GPIO1 (interrupt) pins and GPIO0 (reset) pins are

separate pins to control each sensor separately.

The GPIO1 signals are output on the Arduino connectors and the GPIO0 signals are controlled through the GPIO

expander device. Refer to Figure 3. Arduino connector layout and Figure 11. X-NUCLEO-6180A1 expansion

board with GPIO expander for detailed connectivity.

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Figure 4. Connections of VL6180 breakout boards

Note: The VL6180 breakout boards can be ordered under the reference: VL6180-SATEL

Figure 5. VL6180 SATEL (2x breakout boards)

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1.2 Electrical schematics and list of materials

The figures of this section describe the electrical schematics for each type of board function. The relevant lists of

materials are also presented.

Figure 6. X-NUCLEO-6180A1 expansion board with VL6180 application

Table 4. List of material for VL6180 application

Reference Value Package Comment

C1, C5 100 nF

0603

Ceramic - decoupling - in a final product, could be in a 0402 package

C2 4.7 µF Ceramic - 6 V - decoupling

R1, R2 47 kΩ Pull up - in a final product, could be in a 0402 package

R15, R16 4.7 kΩ Pull up - in a final product, could be in a 0402 package and used for several devices

S1 VL6180 Module Proximity module

Figure 7. X-NUCLEO-6180A1 expansion board with 2.8 V supply regulator

Note: This regulator is requested to convert the 3.3 V coming from the Nucleo or Arduino boards to 2.8 V. In a final

product, the 2.8 V regulator (if it exists) can be used to supply the VL6180.

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Electrical schematics and list of materials

UM2657 - Rev 1 page 7/14

Figure 8. X-NUCLEO-6180A1 expansion board with level shifters

The level shifters are used only to provide adequate voltage for the I/O’s and I2C bus which allows a 5 V Arduino

board to be connected without hardware modifications. In a final product, depending on the power management

tree, the level shifters could be omitted.

Figure 9. X-NUCLEO-6180A1 expansion board with breakout board connector

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Electrical schematics and list of materials

UM2657 - Rev 1 page 8/14

Figure 10. X-NUCLEO-6180A1 expansion board with display control

Figure 11. X-NUCLEO-6180A1 expansion board with GPIO expander

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Electrical schematics and list of materials

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Table 5. List of materials for other features

Reference Value Package Comment

2v8 regulator

C3, C4 10 µF 0805

R4 20 kΩ

0603

R5 50 kΩ

U1 LD39050PUR DFN6 Regulator

Level shifters

C6, C9 1 µF

0603C7, C8, C10, C11 100 nF

R17, R18, R19, R20 4.7 kΩ

U2, U3 ST2329AQTR QFN10 Level shifter

External VL6180 and Nucleo_Arduino connectors

R14 47 kΩ 0603

R26 10 kΩ 0603

Display control

R6, R7, R8, R9, R10, R11, R12, R13 300 Ω

0603

R28, R29, R30, R31 100 kΩ

Q1, Q2, Q3, Q4 SI2333 SOT23 P channel MOSFET

Display1 ATA2453BG-1 4 digits

GPIO expander

U4 STMPE1600 QFN24 STMicroelectronics

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Electrical schematics and list of materials

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