UM3067
User manual
Getting started with the X-NUCLEO-53L7A1 expansion board for STM32 Nucleo
based on the VL53L7CX
Introduction
The X-NUCLEO-53L7A1 is an expansion board for any STM32 Nucleo development board equipped with the Arduino R3
connectors. It provides a complete evaluation kit that allows you to learn, evaluate, and develop applications using the
VL53L7CX Time-of-Flight 8x8 multizone ranging sensor with 90° FoV.
The expansion board is delivered with a cover glass holder in which you can fit three different spacers of 0.25, 0.5, and 1 mm
height below the cover glass to simulate various air gaps. A small oval cover glass fitting the sensor is included.
Several ST expansion boards can be stacked through the Arduino connectors, which allow, for example, the development of
VL53L7CX applications with Bluetooth or Wi-Fi interfaces.
Figure 1. X-NUCLEO-53L7A1 expansion board, spacers, cover glass holder, and oval cover glass
UM3067 - Rev 2 - March 2023
For further information contact your local STMicroelectronics sales office.
www.st.com
1 Getting started
1.1 Safety considerations
1.1.1 Electrostatic precautions
Warning: Take electrostatic precautions, including ground straps, when using the X-NUCLEO-53L7A1
expansion board. Failure to prevent electrostatic discharge could damage the device.
UM3067
Getting started
Figure 2. Electrostatic logo
1.1.2 Laser safety considerations
The VL53L7CX contains a laser emitter and corresponding drive circuitry.
The laser output is designed to remain within Class 1 laser safety limits under all reasonably foreseeable
conditions including single faults in compliance with IEC 60825-1:2007 and IEC 60825-1:2014.
The laser output power must not be increased and no optics should be used with the intention of focusing the
laser beam.
Caution: Use of controls or adjustments or performance of procedures other than those specified herein may result in
hazardous radiation exposure.
Figure 3. Class 1 laser product label
Figure 4. Laser notice 56: applies to IEC 60825-1:2014
1.2
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Features
• VL53L7CX Time-of-Flight 8x8 multizone ranging sensor with 90° FoV
• Accurate absolute ranging distance, independent of the reflectance of the target
• Up to 350 cm ranging
• Histogram-based technology
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VL53L7CX Time-of-Flight sensor characteristics
• Multiobject detection capability
• 0.25, 0.5, and 1 mm spacers to simulate air gaps
• One cover glass to protect the sensor from dust
• Compatible with STM32 Nucleo development boards
• Equipped with Arduino® UNO R3 connectors
• Full system software supplied, including code examples and graphical user interface
• RoHS, CE, UKCA, and China RoHS compliant
1.3 VL53L7CX Time-of-Flight sensor characteristics
• Laser wavelength: 940 nm
• Invisible laser radiation
• Maximum laser power emitted: 130 mW
• Integration time: 2 ms minimum
1.4 Spacers and covers
The X-NUCLEO-53L7A1 expansion board is delivered with:
• three spacers of 0.25 mm, 0.5 mm, and 1 mm height, used to simulate different air gaps between the
VL53L7CX and the rectangular-shaped cover glass;
• two nine-pin headers that allow connecting the two breakout boards to the X-NUCLEO-53L7A1 expansion
board.
Attention: The VL53L7CX is delivered with a liner to prevent potential foreign material from piercing the module holes
during the assembly process. Remove this liner before use.
1.5
Ordering information
Order code
X-NUCLEO-53L7A1 VL53L7CX
Table 1. Ordering information
Core product
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1.6 Simplified schematic
Figure 5. X-NUCLEO-53L7A1 expansion board - simplified schematic
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Simplified schematic
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2 Using the expansion board
The X-NUCLEO-53L7A1 expansion board allows the user to test the VL53L7CX sensor functionality, to program it
and to understand how to develop an application using this sensor.
The X-NUCLEO-53L7A1 integrates:
• the VL53L7CX sensor;
• Arduino UNO R3 connectors;
• Connectors for SATEL-VL53L7CX optional breakout boards;
Important: Program a microcontroller to control the VL53L7CX through the I2C bus.
The application software and an example of the C-ANSI source code are available on the sensor web page.
The X-NUCLEO-53L7A1 expansion board can be connected to the STM32 Nucleo development board through
the Arduino UNO R3 connectors (CN5, CN6, CN8, and CN9) as shown in Figure 5.
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Using the expansion board
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3 Breakout boards
The X-NUCLEO-53L7A1 package does not include the VL53L7CX breakout boards.
You can purchase them in a pack of two PCBs as SATEL-VL53L7CX.
The X-NUCLEO-53L7A1 supplies the VL53L7CX breakout boards at 3.3 V (see Figure 5).
For mechanical integration purposes, it could be interesting to use the mini PCB by breaking the SATEL-
VL53L7CX along the red line as shown in the figure below. It is easier to integrate this setup into a customer's
device thanks to its small size.
UM3067
Breakout boards
Figure 6. SATEL-VL53L7CX
The SATEL-VL53L7CX boards can be directly plugged onto the X-NUCLEO-53L7A1 through the two 9-pin
headers (see Figure 7. SATEL-VL53L7CX breakout boards connected to the X-NUCLEO-53L7A1 expansion
board).
As an alternative, they can be connected to the X-NUCLEO-53L7A1 by using the mini PCB through flying wires
(see Figure 8).
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Breakout boards
Figure 7. SATEL-VL53L7CX breakout boards connected to the X-NUCLEO-53L7A1 expansion board
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Breakout boards
Figure 8. VL53L7CX mini PCB flying wire connection to the X-NUCLEO-53L7A1 expansion board
NC
NC
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Graphical user interface (GUI) and programming example for the X-NUCLEO-53L7A1
4 Graphical user interface (GUI) and programming example for the
X-NUCLEO-53L7A1
To evaluate the VL53L7CX device performance, use the related GUI.
The X-NUCLEO-53L7A1 expansion board requires the NUCLEO-F401RE development board to use the GUI.
Important: Despite the fact that the X-NUCLEO-53L7A1 can be stacked on any STM32 Nucleo board equipped the Arduino
R3 connectors, the GUI is designed to work with the NUCLEO-F401RE only.
Download the GUI (in the Tools and Software tab of the X-NUCLEO-53L7A1 web page) to evaluate the
VL53L7CX.
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5 Schematic diagrams
INT
LPn
SCL
SDA
I2C_RST
PWR_EN
Sensor.SchDoc
PWR_EN
INT
LPn
SDA
I2C_RST
SCL
Right
Satel li te Connector.SchDoc
PWR_EN
INT
LPn
SCL
I2C_RST
SDA
Left
Satel li te Connector.SchDoc
PA1
PA0
PA3
PA4
PA2
PA6
PA5
PA7
PA8
PA10
PA9
PC1
PC0
PC7
PB0
PB10
PB6
PB5
PB4
PB3
PB8
PB9
Host.SchDoc
3V3
R1
2.2kR22.2k
Figure 9. X-NUCLEO-53L7A1 circuit schematic (1 of 5)
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Schematic diagrams
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Figure 10. X-NUCLEO-53L7A1 circuit schematic (2 of 5)
6.3V
C3
4.7uF
10V
C4
100nF
R4
47k
R7
47k
INT
SCL
SDA
LPn
I2C_RST
TP1
R6
47k
R5
47k
10V
C2
1uF
VIN
1
VSS
2
CE
3
NC
4
VOUT
5
U1
XC6222D331MR-G
PWR_EN
R3
47k
3V35V_NUCLEO
3V3
3V33V3
6.3V
C1
4.7uF
J1
2x1 2.54mmT/H
LK1
3V3_NUCLEO
J2
2x1 2.54mmT/H
LK2
3V3
GND
C1
RSVD3
C6
RSVD2
A7
RSVD1
A6
SDA
C3
RSVD5
C5
GND
C7
AVDDB1AVDD
B7
INT
A3
RSVD6
C2
LPn
A5
IOVDD
A4
SCL
C4
RSVD4
A2
I2C_RST
A1
THERMAL PAD
B4
U2
VL53L7CX
AVDD and IOVDD power supply for main sensor
Max Current = 60 mA + 90 mA = 150 mA
Power = 1.7 V x 150 mA = 255 mW
Satell ite boards supplied directly from host power supplies
Jumpers for current measurement
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Schematic diagrams
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page 11/22
Figure 11. X-NUCLEO-53L7A1 circuit schematic (3 of 5)
Nucleo Arduino Connectors
3V3_NUCLEO5V_NUCLEO
PB8
PB9
PC7
PB10
PB4
PB5
PA10
PA2
PA3
PA1
PA0
PA4
PB0
PC1
PC0
PA9
PB6
PA7
PA6
PA5
PB3
PA8
SSQ-110-03-F-S
1
2
3
4
5
6
7
8
9
10
CN5
10x1, 2.54mm, T/H
SSQ-108-03-F-S
1
2
3
4
5
6
7
8
CN6
8x1, 2.54mm, T/H
SSQ-108-03-F-S
1
2
3
4
5
6
7
8
CN9
8x1, 2.54mm, T/H
SSQ-106-03-F-S
1
2
3
4
5
6
CN8
6x1, 2.54mm, T/H
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Schematic diagrams
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Figure 12. X-NUCLEO-53L7A1 circuit schematic (4 of 5)
INT
SCL
SDA
LPn
I2C_RST
PWR_EN
5V_NUCLEO3V3_NUCLEO
1
2
3
4
5
6
7
8
9
J5_Left
9x1, 2.54mm, T/H
INT
SCL
SDA
LPn
I2C_RST
PWR_EN
5V_NUCLEO3V3_NUCLEO
1
2
3
4
5
6
7
8
9
J5_Right
9x1, 2.54mm, T/H
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Schematic diagrams
Figure 13. X-NUCLEO-53L7A1 circuit schematic (5 of 5)
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6 Bill of materials
Item Q.ty Ref. Part/value Description Manufacturer Order code
1 0 R3 Not Fitted 47k, 0201, 1/20 W
2 1 C4 Fitted 100nF, 0201, 10 V
3 1 C2 Fitted 1uF, 0201, 10 V
4 1 CN5 Fitted -
5 1 CN8 Fitted -
6 1 U2 Fitted
7 1 U1 Fitted SOT-25
8 1 A1 Fitted
9 2 C1, C3 Fitted 4.7uF, 0402, 6.3 V
10 2 J1, J2 Fitted
11 2
12 2
13 2 R1, R2 Fitted
14 2
15 4
J5_Left,
J5_Right
Fitted
CN6, CN9
Fitted
LK1, LK2
Fitted
R4, R5, R6,
R7 Fitted
Table 2. X-NUCLEO-53L7A1 bill of materials
RES, 47k, 1%,
1/20W, 0201
CAP, CER, 100nF,
10V, X5R, 0201
CAP, CER, 1uF,
10V, X5R, 0201
CONN, HEADER,
10POS, SNGL,
2.54mm, T/H
CONN, HEADER,
6POS, SNGL,
2,54mm, T/H
VL53L7CXV0GC/
1
-
-
2.2k, 0402, 1/16WRES, 2.2k, 1%,
-
47k, 0201, 1/20 W
Time-of-Flight 8x8
multizone ranging
sensor with wide
field of v
IC, REG, LDO,
3.3V, 0.7A,
SOT25
PCB XNUCLEO-53L7A1
CAP, CER, 4.7uF,
6.3V, X5R, 0402
CONN, HEADER,
2POS, 2.54MM,
T/H, VERT
CONN, HEADER,
9POS, SNGL,
2.54mm, T/H
CONN, HEADER,
8POS, SNGL,
2,54mm, T/H
1/16W, 0402
LINK, HEADER,
2.54MM
RES, 47k, 1%,
1/20W, 0201
Panasonic ERJ1GNF4702C
Murata GRM033R61A104KE15D
Samsung CL03A105KP3NSNC
Samtec SSQ-110-03-F-S
Samtec SSQ-106-03-F-S
ST VL53L7CXV0GC/1
Torex
Semiconductor
manufacturer PCB4132B
TDK C1005X5R0J475K050BC
Harwin M20-9990245
Samtec SSW-109-01-G-S
Samtec SSQ-108-03-F-S
Stackpole
Electronics
Harwin M7571-05
Panasonic ERJ1GNF4702C
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Bill of materials
XC6222D331MR-G
RMCF0402FT2K20
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7 Board versions
PCB version Schematic diagrams Bill of materials
X$NUCLEO-53L7A1A
1. This code identifies the X-NUCLEO-53L7A1 expansion board first version. It is printed on the board PCB.
(1)
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Board versions
Table 3. X-NUCLEO-53L7A1 versions
X$NUCLEO-53L7A1A schematic diagrams X$NUCLEO-53L7A1A bill of materials
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8 Regulatory compliance information
Notice for US Federal Communication Commission (FCC)
For evaluation only; not FCC approved for resale.
FCC NOTICE - This kit is designed to allow:
(1) Product developers to evaluate electronic components, circuitry, or software associated with the kit to
determine
whether to incorporate such items in a finished product and
(2) Software developers to write software applications for use with the end product.
This kit is not a finished product and when assembled may not be resold or otherwise marketed unless all
required FCC equipment authorizations are first obtained. Operation is subject to the condition that this product
not cause harmful interference to licensed radio stations and that this product accept harmful interference. Unless
the assembled kit is designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit
must operate under the authority of an FCC license holder or must secure an experimental authorization under
part 5 of this chapter 3.1.2
Notice for Innovation, Science and Economic Development Canada (ISED)
For evaluation purposes only. This kit generates, uses, and can radiate radio frequency energy and has not been
tested for compliance with the limits of computing devices pursuant to Industry Canada (IC) rules.
À des fins d'évaluation uniquement. Ce kit génère, utilise et peut émettre de l'énergie radiofréquence et n'a pas
été testé pour sa conformité aux limites des appareils informatiques conformément aux règles d'Industrie Canada
(IC).
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Regulatory compliance information
Notice for European Union
This device is in conformity with the essential requirements of the Directive 2014/30/EU (EMC) and of the
Directive 2015/863/EU (RoHS).
Notice for United Kingdom
This device is in compliance with the UK Electromagnetic Compatibility Regulations 2016 (UK S.I. 2016 No. 1091)
and with the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment
Regulations 2012 (UK S.I. 2012 No. 3032).
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Appendix A References
• VL53L7CX data sheet
• X-NUCLEO-53L7A1 data brief: DB4808
• X-CUBE-TOF1 data brief: DB4449
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References
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Revision history
Date Revision Changes
13-Oct-2022 1 Initial release.
03-Mar-2023 2 Updated Section 3 Breakout boards and Section 1.1.2 Laser safety considerations.
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Table 4. Document revision history
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UM3067
Contents
Contents
1 Getting started ....................................................................2
1.1 Safety considerations ...........................................................2
1.1.1 Electrostatic precautions ...................................................2
1.1.2 Laser safety considerations.................................................2
1.2 Features ......................................................................2
1.3 VL53L7CX Time-of-Flight sensor characteristics ....................................3
1.4 Spacers and covers ............................................................3
1.5 Ordering information ............................................................3
1.6 Simplified schematic ............................................................4
2 Using the expansion board ........................................................5
3 Breakout boards...................................................................6
4 Graphical user interface (GUI) and programming example for the X-NUCLEO-53L7A1
....................................................................................9
5 Schematic diagrams ..............................................................10
6 Bill of materials ...................................................................14
7 Board versions ...................................................................15
8 Regulatory compliance information ...............................................16
Appendix A References ..............................................................17
Revision history .......................................................................18
List of tables ..........................................................................20
List of figures..........................................................................21
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List of tables
List of tables
Table 1. Ordering information..................................................................3
Table 2. X-NUCLEO-53L7A1 bill of materials ......................................................14
Table 3. X-NUCLEO-53L7A1 versions .......................................................... 15
Table 4. Document revision history ............................................................. 18
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UM3067
List of figures
List of figures
Figure 1. X-NUCLEO-53L7A1 expansion board, spacers, cover glass holder, and oval cover glass.................1
Figure 2. Electrostatic logo ..................................................................2
Figure 3. Class 1 laser product label ............................................................2
Figure 4. Laser notice 56: applies to IEC 60825-1:2014...............................................2
Figure 5. X-NUCLEO-53L7A1 expansion board - simplified schematic.....................................4
Figure 6. SATEL-VL53L7CX .................................................................6
Figure 7. SATEL-VL53L7CX breakout boards connected to the X-NUCLEO-53L7A1 expansion board ..............7
Figure 8. VL53L7CX mini PCB flying wire connection to the X-NUCLEO-53L7A1 expansion board .................8
Figure 9. X-NUCLEO-53L7A1 circuit schematic (1 of 5)..............................................10
Figure 10. X-NUCLEO-53L7A1 circuit schematic (2 of 5).............................................. 11
Figure 11. X-NUCLEO-53L7A1 circuit schematic (3 of 5).............................................. 12
Figure 12. X-NUCLEO-53L7A1 circuit schematic (4 of 5).............................................. 13
Figure 13. X-NUCLEO-53L7A1 circuit schematic (5 of 5).............................................. 13
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UM3067
IMPORTANT NOTICE – READ CAREFULLY
STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST
products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST
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are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2023 STMicroelectronics – All rights reserved
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