STMicroelectronics B-L475E-IOT01A User Manual

UM2153

User manual

Discovery kit for IoT node, multi-channel communication

with STM32L4

Introduction

The STM32L4 Discovery kit for the IoT node (B-L475E-IOT01A) allows users to develop applications with direct connection to cloud servers.

The STM32L4 Discovery kit enables a wide diversity of applications by exploiting low-power multilink communication (Bluetooth ® environmental awareness) and Arm ®

Low Energy, Sub-GHz), multiway sensing (detection,

Cortex ® -M4 core-based STM32L4 Series features.

ARDUINO ® Uno V3 and PMOD™ connectivity provide unlimited expansion capabilities with a large choice of specialized add-on boards.

The STM32L4 Discovery kit includes an ST-LINK debugger/programmer and comes with the comprehensive STM32Cube software libraries together with packaged software examples to seamlessly connect to cloud servers. In addition a direct access to the Arm ®

Mbed Enabled ™ on-line resources at http://mbed.org is available.

Figure 1. B-L475E-IOT01A Discovery kit

October 2019

1. Picture is not contractual.

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Contents

Contents

UM2153

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Development toolchains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Demonstration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7.1

STM32L4 Discovery kit for IoT node layout . . . . . . . . . . . . . . . . . . . . . . . 10

7.2

STM32L4 Discovery kit for IoT node mechanical drawing . . . . . . . . . . . . 12

7.3

Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7.3.1

7.3.2

Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7.4

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7.5

Programming/debugging when the power supply is not from

ST-LINK (5V_ST_LINK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7.6

Clock sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7.7

Reset sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7.8

USB OTG FS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

7.9

Quad-SPI NOR Flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

7.10

Virtual COM port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

7.11

RF modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

7.11.1

Bluetooth (V4.1 compliant) SPBTLE-RF module . . . . . . . . . . . . . . . . . . 20

7.11.2

Sub-GHz low-power-programmable RF module

(SPSGRF-868 or SPSGRF-915) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

7.11.3

Wi-Fi module Inventek system ISM43362-M3G-L44 (802.11 b/g/n) . . . 22

7.11.4

Dynamic NFC Tag based on M24SR with its printed NFC antenna . . . . 23

7.12

STMicroelectronics sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

7.12.1

Two on-board ST-MEMS microphones (MP34DT01) . . . . . . . . . . . . . . 24

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7.12.2

Capacitive digital sensor for relative humidity and temperature (HTS221) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

7.12.3

High-performance 3-axis magnetometer (LIS3MDL) . . . . . . . . . . . . . . . 25

7.12.4

3D accelerometer and 3D gyroscope (LSM6DSL) . . . . . . . . . . . . . . . . 26

7.12.5

260-1260 hPa absolute digital output barometer (LPS22HB) . . . . . . . . 26

7.12.6

Time-of-Flight and gesture detection sensor (VL53L0X) . . . . . . . . . . . . 27

7.13

STSAFE-A 100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.14

Buttons and LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7.15

I

2

C addresses of modules used on MB1297 . . . . . . . . . . . . . . . . . . . . . . 29

Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8.1

ARDUINO

® Uno V3 connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

8.2

TAG connector CN5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

8.3

ST-LINK/V2-1 USB Micro-B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

8.4

ST-LINK debug connector CN8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

8.5

USB OTG FS micro-AB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

8.6

PMOD™ connector CN10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

8.7

Jumper JP5 for IDD measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Appendix A STM32L4 Discovery kit for IoT node I/O assignment . . . . . . . . . . . 37

Appendix B Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Appendix C Board revision history and limitations . . . . . . . . . . . . . . . . . . . . . . 53

Appendix D Federal Communications Commission (FCC) and Industry Canada (IC) Compliance . . . . . . . . . . . . . . . . . . . . . . . 54

D.1

FCC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

D.1.1

D.1.2

8.7.1

Part 15.19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Part 15.105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Part 15.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

8.8

IC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

8.8.1

8.8.2

8.8.3

Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Déclaration de conformité . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

RF exposure statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

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List of tables

List of tables

UM2153

Table 1.

Table 2.

Table 3.

Table 4.

Table 5.

Table 6.

Table 7.

Table 8.

I

Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Button and LED control port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

2

C addresses for each module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

ARDUINO

®

connector pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

TAG connector pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

USB Micro-B connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

ST-LINK debug connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

USB OTG FS Micro-AB pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 9.

USB OTG FS power management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 10.

PMOD™ solder bridge configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Table 11.

STM32L4 Discovery kit for IoT node I/O assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 12.

Board revision history and limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Table 13.

Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

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List of figures

List of figures

Figure 1.

B-L475E-IOT01A Discovery kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2.

Hardware block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 3.

STM32L4 Discovery kit for IoT node (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 4.

STM32L4 Discovery kit for IoT node (bottom view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 5.

STM32L4 Discovery kit for IoT node mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 6.

USB composite device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 7.

JP4: 5V_ST_LINK selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 8.

JP4: 5V_ARD selection from CN6 (VIN). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 9.

JP4: 5V_USB_FS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 10.

JP4: 5V_VBAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 11.

JP4: 5V_USB_CHARGER selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 12.

Power tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 13.

SPBTLE-RF module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 14.

SPSGRF module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 15.

ISM43362-M3G-L44 module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 16.

Label for Class 1 laser products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 17.

ARDUINO

®

connector (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 18.

TAG connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 19.

TC2050-IDC-NL cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 20.

USB Micro-B connector CN7 (front view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 21.

USB OTG FS Micro-AB connector CN9 (front view). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 22.

STM32L4 Discovery kit for IoT node (top) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 23.

STM32L475VG microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 24.

STM32L475VG microcontroller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 25.

USB OTG FS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 26.

RF module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 27.

ST-MEMS sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 28.

NFC and STSAFE part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 29.

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 30.

ARDUINO

®

Uno V3 connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 31.

Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 32.

ST-LINK/V2-1 with support of SWD only . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

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Features

1 Features

UM2153

• Ultra-low-power STM32L4 Series MCU based on Arm

®

Cortex

®

-M4 core with 1 Mbyte of

Flash memory and 128 Kbytes of SRAM, in LQFP100 package

• 64-Mbit Quad-SPI Flash memory

• Bluetooth ® V4.1 module (SPBTLE-RF)

• Sub-GHz (868 or 915 MHz) low-power-programmable RF module

(SPSGRF-868 or SPSGRF-915)

• Wi-Fi ® module Inventek system ISM43362-M3G-L44 (802.11 b/g/n compliant)

• Dynamic NFC tag based on M24SR with its printed NFC antenna

• 2 digital omnidirectional microphones (MP34DT01)

• Capacitive digital sensor for relative humidity and temperature (HTS221)

• High-performance 3-axis magnetometer (LIS3MDL)

• 3D accelerometer and 3D gyroscope (LSM6DSL)

• 260-1260 hPa absolute digital output barometer (LPS22HB)

• Time-of-Flight and gesture-detection sensor (VL53L0X)

• 2 push-buttons (user and reset)

• USB OTG FS with Micro-AB connector

• ARDUINO

®

Uno V3 expansion connector

• PMOD™ expansion connector

• Flexible power-supply options: ST-LINK USB V

BUS

or external sources

• On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability: mass storage, Virtual COM port and debug port

• Comprehensive free software including a variety of examples, as part of the STM32Cube package, as well as a cloud connector software expansion, enabling direct access to cloud servers

• Support of wide choice of Integrated Development Environments (IDEs) including IAR

™

,

Keil

®

, GCC-based IDEs, Arm

®

Mbed Enabled

™

• Arm ® Mbed Enabled ™ (see http://mbed.org)

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UM2153 Rev 5

UM2153 Product marking

Evaluation tools marked as "ES" or "E" are not yet qualified and therefore they are not ready to be used as reference design or in production. Any consequences deriving from such usage will not be at ST charge. In no event, ST will be liable for any customer usage of these engineering sample tools as reference design or in production.

"E" or "ES" marking examples of location:

• On the targeted STM32 that is soldered on the board (for illustration of STM32 marking, refer to the section “Package characteristics” of the STM32 datasheet at www.st.com

).

• Next to the evaluation tool ordering part number, that is stuck or silk-screen printed on the board.

• Windows ® OS (7, 8 and 10), Linux ® or macOS ®(a)

• USB Type-A to Micro-B cable

• Keil

®

MDK-ARM

(b)

• IAR ™ EWARM (b)

• GCC-based IDEs

• Arm ® Mbed™ online (c) (see mbed.org

)

The demonstration software, included in the STM32Cube package, is preloaded in the

STM32 Flash memory for easy demonstration of the device peripherals in standalone mode.

The latest versions of the demonstration source code and associated documentation can be downloaded from the www.st.com/stm32app-discovery webpage.

a. macOS

®

is a trademark of Apple Inc. registered in the U.S. and other countries.

b. On Windows® only.

c. Refer to the www.mbed.com

website and to the Ordering information section to determine which order codes are supported.

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56

Ordering information UM2153

To order the B-L475E-IOT01A Discovery kit for IoT node, depending on the frequency of the

Sub-GHz module, refer to

Table 1 .

Order code

B-L475E-IOT01A1

B-L475E-IOT01A2

Table 1. Ordering information

Sub-GHz operating frequency

915 MHz

868 MHz

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7

Hardware layout and configuration

Hardware layout and configuration

The STM32L4 Discovery kit for IoT node is designed around the STM32L475VGT6 (100pin, LQFP package). The hardware block diagram (see

Figure 2 ) illustrates the connection

between the STM32 and peripherals (embedded ST-LINK, ARDUINO ® Uno V3 shields,

PMOD™ connector, Quad-SPI Flash memory, USB OTG connectors, digital microphones, various ST-MEMS sensors and the four RF modules (Wi-Fi, Bluetooth, Sub-GHz and NFC)).

Figure 4

and Figure 5

help users to locate these features on the STM32L4 Discovery kit.

Figure 2. Hardware block diagram

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UM2153 Rev 5

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56

7.1 STM32L4 Discovery kit for IoT node layout

Figure 3. STM32L4 Discovery kit for IoT node (top view)

Figure 4. STM32L4 Discovery kit for IoT node (bottom view)

7.2 STM32L4 Discovery kit for IoT node mechanical drawing

Figure 5. STM32L4 Discovery kit for IoT node mechanical drawing

1. Plastic Spacer Height = 14mm, Overall Height = 26mm +/- 1mm.

UM2153 Hardware layout and configuration

The ST-LINK/V2-1 programming and debugging tool is integrated on the STM32L4 Discovery kit for IoT node. Compared to the ST-LINK/V2 the changes are listed below.

The new features supported on the ST-LINK/V2-1 are:

• USB software re-enumeration

• Virtual COM port interface on USB

• Mass storage interface on USB

• USB power management request for more than 100 mA power on USB

The following features are no more supported on the ST-LINK/V2-1:

• SWIM interface

• Application voltage lower than 3 V

For all general information concerning debugging and programming features common between V2 and V2-1 versions, refer to ST-LINK/V2 in-circuit debugger/programmer for

STM8 and STM32 User manual (UM1075) at the www.st.com

website.

7.3.1 Drivers

Before connecting STM32L475VG to a Windows

®

PC (XP, 7, 8 or 10) via USB, a driver for the ST-LINK/V2-1 must be installed. It is available at the www.st.com website.

Note:

In case the STM32L4 Discovery kit for IoT node is connected to the PC before the driver is installed, some STM32L4 Discovery kit interfaces may be declared as “unknown” in the PC device manager. In this case the user must install the driver files, and update the driver of

the connected device from the device manager (see Figure 6

).

Prefer using the “USB Composite Device” handle for a full recovery.

Figure 6. USB composite device

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7.3.2 ST-LINK/V2-1 firmware upgrade

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The ST-LINK/V2-1 embeds a firmware upgrade mechanism for in-situ upgrade through the

USB port. As the firmware may evolve during the lifetime of the ST-LINK/V2-1 product (for example new functionalities, bug fixes, support for new microcontroller families), it is recommended to visit the www.st.com

website, before starting to use the STM32L4

Discovery kit for IoT node and periodically, to stay up-to-date with the latest firmware version.

The STM32L4 Discovery kit for IoT node is designed to be powered by 5 V DC power supply. It is possible to configure the STM32L4 Discovery kit to use any of the following five sources for the power supply: 5V_ST_LINK, 5V_ARD, 5V_USB_FS, 5V_VBAT and

5V_USB_CHARGER.

In case of external 5 V DC power adapter, the STM32L4 Discovery kit must be powered by a power supply unit or by an auxiliary equipment complying with the standard EN-60950-1:

2006+A11/2009, and must be Safety Extra Low Voltage (SELV) with limited power capability.

• 5V_ST_LINK (See

Figure 7 ) is a 5V DC power with limitation from CN7 (the USB type

Micro-B connector of ST-LINK/V2-1). In this case, jumper of JP4 should be on pins 1 and 2 to select the 5V_ST_LINK power source on silkscreen of JP4. This is the default setting. If the USB enumeration succeeds, the 5V_ST_LINK power is enabled, by asserting the PWR_ENn signal (from STM32F103CBT6). This pin is connected to a power switch ST890, which powers the board. This power switch features also a current limitation to protect the PC in case of a short-circuit on board (more than

750 mA). STM32L4 Discovery kit for IoT node can be powered from the ST-LINK USB connector CN7, but only ST-LINK circuit has the power before USB enumeration, because the host PC only provides 100 mA to the board at that time. During the USB enumeration, STM32L4 Discovery kit for IoT node asks for the 500 mA power to the host PC. If the host is able to provide the required power, the enumeration finishes by a

“SetConfiguration” command and then, the power transistor ST890 is switched ON, the red LED LD7 is turned ON, thus the STM32L4 Discovery kit for IoT node consumes up to 500 mA current, but no more. If the host is not able to provide the requested current, the enumeration fails. Therefore the ST890 remains OFF and the MCU part including the extension board is not powered. As a consequence the red LED LD7 remains turned OFF. In this case it is mandatory to use an external power supply.

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Figure 7. JP4: 5V_ST_LINK selection

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VIN on ARDUINO ®

CN2 pin 8 (named

connector silkscreen). In this case, jumper of JP4 should be on pins

3 and 4 to select the 5V_ARD power source on silkscreen of JP4. In that case, the DC power comes from the power supply through the ARDUINO ® Uno V3 battery shield

(compatible with Adafruit ® PowerBoost 500 Shield).

Figure 8. JP4: 5V_ARD selection from CN6 (VIN)

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• 5V_USB_FS

(see Figure 9 ) is the DC power with 500 mA limitation from CN9, the USB

OTG FS micro-AB connector. In this case, jumper of JP4 should be on pins 5 and 6 to select the 5V_USB_FS power source on silkscreen of JP4.

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Figure 9. JP4: 5V_USB_FS

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• 5V_VBAT

(see Figure 10 ) is the DC power coming from external. In this case, jumper of

JP4 should be on pins 7 and 8 to select the 5V_VBAT power source on silkscreen of

JP4.

Figure 10. JP4: 5V_VBAT

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) is the DC power charger connected to the USB

ST-LINK (CN7). To select the 5V_USB_CHARGER power source on silkscreen of JP4, the jumper of JP4 should be on pins 9 and 10. In this case, if the STM32L4 Discovery kit for IoT node is powered by an external USB charger then the debug is not available. If the PC is connected instead of the charger, the limitation is no longer effective and the

PC could be damaged.

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Figure 11. JP4: 5V_USB_CHARGER selection

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Note: If the board is powered by a USB charger, there is no USB enumeration, so the led LD7 remains OFF permanently and the board is not powered. In this specific case only, the resistor R30 needs to be soldered, to allow the board to be powered anyway.

Caution: Do not connect the PC to the ST-LINK (CN7) when R30 is soldered. The PC may be damaged or the board may not be powered correctly.

The green LED LD5 is lit when the STM32L4 Discovery kit for IoT node is powered by the 5 V correctly.

The power tree is showed in the

Figure 12 .

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Hardware layout and configuration

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when

ST-LINK (5V_ST_LINK)

It is mandatory to power the board first using CN2 (V

IN

) or CN9 (USB_FS_OTG), then connecting the USB cable to the PC. Proceeding this way ensures that the enumeration succeeds thanks to the external power source.

The following power sequence procedure must be respected:

• Connect the jumper JP4 on (5V_ARD) or (5V_USB_FS)

• Connect the external power source to CN2 in case of an ARDUINO

® case of USB FS host interface

shield or to CN9 in

• Check that the red LED LD5 is turned ON

• Connect the PC to USB connector CN7

If this sequence is not respected, the board may be powered by V

BUS the following risks may be encountered:

first from ST-LINK, and

• If more than 500 mA current is needed by the board, the PC may be damaged or current can be limited by PC. As a consequence the board is not powered correctly.

• 500 mA is requested at the enumeration, so there is a risk that the request is rejected and enumeration does not succeed if the PC cannot provide such current.

Three clock sources are described below:

• X1 which is the 8 MHz oscillator for STM32L475VG microcontroller. This clock is not implemented in a basis configuration.

• X2 which is the 32.768 KHz crystal for the STM32L475VG embedded RTC

• X3 which is the 8 MHz clock from ST-LINK MCU for the STM32L475VG microcontroller.

7.8

The reset signal of the STM32L4 Discovery kit is active low and the reset sources includes:

• A reset button B1

• An ARDUINO ® Uno V3 shield board from CN2

• An embedded ST-LINK/V2-1

USB OTG FS

The STM32L4 Discovery kit supports USB OTG FS communication via a USB Micro-AB connector (CN9).

To do this the following components must be added by the users:

• 8 MHz crystal (at X1 position); ref: NX3225GD-8.00M

• 8.2 pF capacitor (0402 size) at C2 position

• 8.2 pF capacitor (0402 size) at C4 position

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Hardware layout and configuration UM2153

• 0 ohm resistor (0402 size) at R5 position

• 0 ohm resistor (0402 size) at R7 position

The STM32L4 Discovery kit can be powered by the USB connectors at 5 V DC with 500 mA current limitation.

A USB power switch (IC19) is also connected on V

BUS green LED LD9 is lit when either:

and provides power to CN9. The

• Power switch is ON and STM32L4 Discovery kit works as an USB host

• V

BUS

is powered by another USB host when STM32L4 Discovery kit works as a USB device.

The red LED LD8 is lit when an over-current occurs.

64-Mbit Quad-SPI NOR Flash memory is connected to the Quad-SPI interface of the

STM32L475VGT6.

7.10 Virtual COM port

The serial interface USART1 is directly available as a Virtual COM port of the PC connected to the ST-LINK/V2-1 USB connector CN7. The Virtual COM port settings are configured as:

115200 b/s, 8 bits data, no parity, 1 stop bit, no flow control.

Four RF interfaces are available on the STM32L4 Discovery kit for IoT node board:

• Bluetooth (V4.1 compliant) SPBTLE-RF module

• Sub-GHz (868 or 915 MHz) low-power-programmable RF module (SPSGRF-868 or

SPSGRF-915),

• Wi-Fi module Inventek system ISM43362-M3G-L44 (802.11 b/g/n compliant)

• Dynamic NFC tag based on M24SR with its printed NFC antenna (double layer inductive antenna etched on the PCB).

7.11.1 Bluetooth (V4.1 compliant) SPBTLE-RF module

The ST SPBTLE-RF module (M1) is implemented on top side of the STM32L4 Discovery kit for IoT node board.

The SPBTLE-RF is an easy to use Bluetooth smart master/slave network processor module, compliant with Bluetooth V4.1. The SPBTLE-RF B-Smart module supports multiple roles simultaneously, and it can act at the same time as Bluetooth Smart sensor and hub device.

The entire Bluetooth Smart stack and protocol are embedded into the SPBTLE-RF B-Smart module. The external host application processor, where the application resides, is connected to the SPBTLE-RF B-Smart module through a standard SPI interface (SPI3 of

STM32L475VGT6).

The SPBTLE-RF B-Smart module provides a complete RF platform in a tiny form factor (foot print of this module is 13.5 mm x 11.5 mm). Radio, antenna, high frequency and LPO

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Figure 13. SPBTLE-RF module

The main features of the ST SPBTLE-RF module are listed below.

• Bluetooth V4.1 compliant (supports master and slave modes, multiple roles supported simultaneously

• Embedded Bluetooth low-energy protocol stack (GAP, GATT, SM, L2CAP, LL, RFPHY)

• Bluetooth low-energy profiles provided separately

• Bluetooth radio performance:

• Embedded ST BlueNRG-MS

• Tx power: + 4 dBm

• Host interface: SPI, IRQ, and RESET. On-field stack upgrading available via SPI.

• Certification: CE qualified, FCC, IC modular approval certified, BQE qualified

• On-board chip antenna

7.11.2 Sub-GHz

(SPSGRF-868 or SPSGRF-915)

Two modules are available depending on the frequency of the Sub-GHz module (M3). The

SPSGRF-868 and SPSGRF-195 are easy-to-use, low-power Sub-GHz modules based on the SPIRIT1 RF transceiver, operating respectively in the 868 MHz SRD and 915 MHz ISM bands.

The modules provide a complete RF platform in a tiny form factor (foot print of this module is

13.5 mm x 11.5 mm). The SPSGRF-915 is an FCC certified module (FCC ID: S9NSPSGRF) and IC certified (IC 8976CSPSGRF), while the SPSGRF-868 is certified CE0051.

The modules include four programmable I/O pins and an SPI serial interface (SPI3 of

STM32L475VG).

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Hardware layout and configuration

Figure 14. SPSGRF module

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The main features of the ST SPSGRF module are listed below.

• Programmable radio features:

– Based on Sub-1GHz SPIRIT1 transceiver and integrated Balun (BALF-SPI-01D3)

– Modulation schemes: 2-FSK, GFSK, MSK, GMSK, OOk and ASK

– Air data rate from 1 to 500 kbps

– On-board antenna

• Programmable RF output power up to +11.6 dBm

• Host interface: SPI

• General I/O (up to 32 programmable I/O functions on 4 GPIO programmable module pins

• Two typical carrier frequency versions:

– SPSGRF-868 with 868 MHz tuned antenna

– SPSGRF-195 with 915 MHz tuned antenna

7.11.3 Wi-Fi module Inventek system ISM43362-M3G-L44 (802.11 b/g/n)

The Inventek system ISM43362-M3G-L44 module (M2) is implemented on top side of the

STM32L4 Discovery kit for IoT node board. This module is an embedded (eS-WiFi) wireless

Internet Connectivity device. The Wi-Fi module hardware consists of an Arm ® Cortex ® -M3

STM32 host processor, an integrated antenna (or optional external antenna) and a

Broadcom Wi-Fi device. The module uses either a UART (UART3 of STM32L475VG) or an

SPI (SPI3 of STM32L475VG) interface. As default, an SPI interface is used, as the corresponding firmware (for SPI capability) is downloaded on the Wi-Fi ISM43362-M3G-L44 module. The Wi-Fi module requires no operating system and has a completely integrated

TCP/IP stack that only requires AT commands to establish connectivity for wireless product.

The foot print of this module is 14.5 mm x 30 mm.

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Figure 15. ISM43362-M3G-L44 module

Note:

The main features of the Inventek system ISM43362-M3G-L44 module are:

• Based on the Broadcom BCM43362 MAC/Baseband/Radio device

• Supports Broadcom WICED SDK

• CPU Arm ® Cortex ® -M3 32-bit RISC core from ST Microelectronics

• IEEE 802.11n D7.0 -OFDM-72.2 Mbps -single stream w/20 MHz, Short GI

• IEEE 802.11g (OFDM 54 Mbps)

• IEEE 802.11b (DSSS 11 Mbps)

• IEEE 802.11i (Security)

– WPA (Wi-Fi Protected Access) –PSK/TKIP

– WPA2 (Wi-Fi Protected Access 2)- AES/CCMP/802.1x Authentication

• GPIO, 5 ADC (SPI interface utilizes ADC pins)

• Power-saving mode allows the design of low-power applications

• Lead Free Design which is compliant with ROHS requirements

• EMI/EMC Metal Shield for best RF performance in noisy environments and to accommodate for lower RF emissions/signature for easier FCC compliance.

• FCC/CE compliance certification

On both MB1297 rev C and MB1297 rev D, the firmware revision inside the Wi-Fi module must be: C3.5.2.3.BETA9. The Wi-Fi module maximum output power is limited to 9 dBm to fulfill FCC/IC/CE requirements. A Wi-Fi output power higher than 9 dBm at the Wi-Fi antenna is not allowed.

Since Wi-Fi and Bluetooth Low Energy modules are using the same frequency ISM band

(2.4 to 2.485 GHz), the simultaneous activity of both modules may affect the RF performances of Wi-Fi and/or Bluetooth Low Energy (in term of range or throughput).

7.11.4 Dynamic NFC Tag based on M24SR with its printed NFC antenna

M24SR64-Y belongs to the ST25 family which includes all STMicroelectronics NFC/RFID

Tag and reader products. The M24SR64-Y device is a dynamic NFC/RFID Tag IC with a dual interface. It embeds an EEPROM memory. It can be operated from an I 2 C interface or by a 13.56 MHz RFID reader or by an NFC phone. The I 2 C interface uses a two-wire serial

I interface, consisting of a bidirectional data line and a clock line. It behaves as a slave in the

2 C protocol.

The RF protocol is compatible with ISO/IEC 14443 Type A and NFC Forum Type 4 Tag.

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The main features of the M24SR64-Y are:

• I

2

C interface (I2C2 of STM32L475VGT6). The two-wire I

2

C serial interface supports

1 MHz protocol.

• Contactless interface:

– NFC Forum Type 4 Tag

– ISO/IEC 14443 Type A

– 106 Kbps data rate

– Internal tuning capacitance: 25 pF

• Memory:

– 8-Kbyte (64-kbit) EEPROM

– Support of NDEF data structure

– Data retention: 200 years

– Write cycle endurance:

1 million Write cycles at 25 °C

600 K Write cycles at 85 °C

500 K Write cycles at 105 °C

• Read up to 246 Bytes in a single command

• Write up to 246 Bytes in a single command

• 7-Byte unique identifier (UID)

• 128-bit password protection

7.12 STMicroelectronics sensors

Several STMicroelectronics sensors are available on the STM32L4 Discovery kit for IoT node board, they are listed below:

• 2 on-board ST-MEMS audio sensor omnidirectional digital microphones (MP34DT01)

• Capacitive digital sensor for relative humidity and temperature (HTS221)

• High-performance 3-axis magnetometer (LIS3MDL)

• 3D accelerometer and 3D gyroscope (LSM6DSL)

• 260-1260 hPa absolute digital output barometer (LPS22HB)

• Time-of-Flight and gesture detection sensor (VL53L0X)

The MP34DT01 is an ultra-compact, low-power, omnidirectional, digital ST-MEMS microphone built with a capacitive sensing element and an IC interface.

The sensing element, capable of detecting acoustic waves, is manufactured using a specialized silicon micromachining process dedicated to produce audio sensors.

The IC interface is manufactured using a CMOS process that allows designing a dedicated circuit able to provide a digital signal externally in PDM format.

The MP34DT01 has an acoustic overload point of 120 dBSPL with a 63 dB signal-to-noise ratio and –26 dBFS sensitivity.

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On the STM32L4 Discovery kit for IoT node, there are two MP34DT01 microphones: one with LR pulled to V

DD

and the second with LR pulled low. DFSDM1_CKOUT and

DFSDM1_DATIN2 are connected for both. In addition, both microphones are spaced at

21 mm apart for the beamforming algorithm to work. Indeed, several algorithm configurations are available for the user to find the best trade off between audio output quality and resource consumption. For more details refer to STEVAL-IHM038V1: 3-phase

BLDC/PMSM motor drive up to 50 W, suitable for fan controllers User manual (UM1697) on the www.st.com

website.

The MP34DT01 is available in a package HCLGA (3x4 x1 mm) 4LD, in a top-port design,

SMD-compliant, EMI-shielded package and it is guaranteed to operate over an extended temperature range from -40°C to +85°C.

digital temperature (HTS221)

The HTS221 is an ultra-compact sensor for relative humidity and temperature. It includes a sensing element and a mixed signal ASIC to provide the measurement information through digital serial interfaces.

The sensing element consists of a polymer dielectric planar capacitor structure capable of detecting relative humidity variations and it is manufactured using a dedicated ST process.

The HTS221 is available in a small top-holed cap land grid array (HLGA-6L (2 x 2 x 0.9 mm)) package guaranteed to operate over a temperature range from -40 °C to +120 °C.

The main features of the HTS221 are:

• 0 to 100% relative humidity range,

• Low-power consumption: 2 μ A @ 1 Hz ODR

• Selectable ODR from 1 Hz to 12.5 Hz

• High rH sensitivity: 0.004% rH/LSB

• Humidity accuracy: ± 3.5% rH, 20 to +80% rH

• Temperature accuracy: ± 0.5 °C,15 to +40 °C

• Embedded 16-bit ADC

• 16-bit humidity and temperature output data

• SPI and I 2 C interfaces. On the STM32L4 Discovery kit for IoT node, the I2C2 bus from

STM32L475VG is used.

• Factory calibrated

• Tiny 2 x 2 x 0.9 mm package

• ECOPACK compliant

The LIS3MDL is an ultra-low-power high-performance three-axis magnetic sensor.

The LIS3MDL has user-selectable full scales of ±4/ ±8/ ±12/±16 gauss.

The self-test capability allows the user to check the functionality of the sensor in the final application.

The device may be configured to generate interrupt signals for magnetic field detection.

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The LIS3MDL includes an I 2 C serial bus interface, that supports standard and fast mode

(100 kHz and 400 kHz), and an SPI serial standard interface. On the STM32L4 Discovery kit IoT node, the I2C2 bus from STM32L475VG is used.

The LIS3MDL is available in a small thin plastic land grid array package (LGA-12

(2.0x2.0x1.0 mm)) and is guaranteed to operate over an extended temperature range of -40

°C to +85 °C.

LIS3MDL is also ECOPACK, RoHS and “Green” compliant.

7.12.4 3D accelerometer and 3D gyroscope (LSM6DSL)

The LSM6DSL is a system-in-package featuring a 3D digital accelerometer and a 3D digital gyroscope performing at 0.65 mA in high-performance mode and enabling always-on low-power features for an optimal motion experience for the consumer.

The event-detection interrupts enable efficient and reliable motion tracking and contextual awareness, implementing hardware recognition of free-fall events, 6D orientation, click and double-click sensing, activity or inactivity, and wake-up events.

The LSM6DSL supports main OS requirements, offering real, virtual and batch sensors with

4 Kbytes for dynamic data batching.

The LSM6DSL has been designed to implement features such as significant motion, tilt, pedometer functions, step detector and step counter, time stamping and to support the data acquisition of an external magnetometer with ironing correction (hard, soft).

The LSM6DSL has a full-scale acceleration range of ±2/±4/±8/±16 g and an angular rate range of ±125/±245/±500/±1000/±2000 dps.

The registers embedded inside the LSM6DSL may be accessed through both the I

2

C and

SPI serial interfaces. On the STM32L4 Discovery kit for IoT node, the I2C2 bus from

STM32L475VGT6 is used.

The LSM6DSL is available in a plastic land grid array (LGA-14L (2.5x3x0.83mm)) package,

ECOPACK, RoHS and “Green” compliant.

7.12.5 260-1260 hPa absolute digital output barometer (LPS22HB)

The absolute pressure-sensing device LPS22HB is an ultra-compact piezoresistive sensor which functions as a digital output barometer.

The device comprises a sensing element and an IC interface which communicates from the sensing element to the application through I 2 C or SPI. On the STM32L4 Discovery kit for

IoT node the I2C2 bus from the STM32L475VG is used.

The sensing element, which detects absolute pressure, consists of a suspended membrane manufactured using a dedicated process developed by ST.

The LPS22HB is available in a full-mold, holed LGA package (HLGA). It is guaranteed to operate over a temperature range extending from -40 °C to +85 °C. The package is holed to allow external pressure to reach the sensing element.

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The main features of the LPS22HB are:

• 260 to 1260 hPa absolute pressure range

• Current consumption down to 3 μ A

• High overpressure capability: 20x full-scale

• Embedded temperature compensation

• 24-bit pressure data output

• 16-bit temperature data output

• ODR from 1 Hz to 75 Hz

• SPI and I ² C interfaces

• Embedded FIFO

• Interrupt functions: Data Ready, FIFO flags, pressure thresholds

• Supply voltage: 1.7 to 3.6 V

• High shock survivability: 22,000 g

• Small and thin package

• ECOPACK lead-free compliant

7.12.6 Time-of-Flight and gesture detection sensor (VL53L0X)

The VL53L0X is a new generation Time-of-Flight (ToF) laser-ranging module housed in a small package, providing accurate distance measurement whatever the target reflectance unlike conventional technologies. It can measure absolute distances up to 2 m, setting a new benchmark in ranging performance levels, opening the door to various new applications.

The VL53L0X integrates a leading-edge SPAD array (Single Photon Avalanche Diodes) and embeds an ST second generation FlightSense patented technology.

The VL53L0X 940 nm VCSEL emitter (Vertical Cavity Surface-Emitting Laser), is totally invisible to the human eye, coupled with internal physical infrared filters, it enables longer ranging distance, higher immunity to ambient light and better robustness to cover-glass optical cross-talk.

The main features of the VL53L0X are listed below.

• Fully integrated miniature module:

– 940 nm Laser VCSEL

– VCSEL driver

– Ranging sensor with advanced embedded micro controller

– 4.4 x 2.4 x 1.0 mm size

• Fast, accurate distance ranging:

– Measures absolute range up to 2 m

– Reported range is independent of the target reflectance

– Operates in high infrared ambient light levels

– Advanced embedded optical cross-talk compensation to simplify cover glass selection

• Eye safe:

– Class 1 laser device compliant with the latest standard IEC 60825-1:2014 - 3rd edition. The laser output will remain within Class 1 limits as long as the

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STMicroelectronics recommended device settings are used and the operating conditions, specified in the STM32L4 datasheets, are respected. The laser output power must not be increased by any means and no optics should be used with the intention of focusing the laser beam.

Figure 16

shows the warning label for

Class 1 laser products.

• Easy integration:

– No additional optics

– Single power supply

– I 2 C interface for device control and data transfer: I2C2 from STM32L475VGT6 is used

– Xshutdown (Reset) and interrupt GPIO

– Programmable I 2 C address

Figure 16. Label for Class 1 laser products

The STSAFE-A100 is a highly secure solution that acts as a secure element, providing authentication and data management services to a local or remote host. It consists of a full turnkey solution with a secure operating system running on the latest generation of secure microcontrollers. The STSAFE-A100 can be integrated in IoT (Internet of things) devices, smart-home, smart-city and industrial applications, consumer electronics devices, consumables and accessories. The STSAFE-A100 can be mounted on:

• A device that authenticates to a remote host (IoT device case), the local host being used as a pass-through to the remote server.

• A peripheral that authenticates to a local host, for example games, mobile accessories or consumables.

The STSAFE-A100 is not implemented on the MB1297 Rev C board.

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The black button B1 located on top side is the reset of the microcontroller

STM32L475VGT6. Refer to the

Figure 3: STM32L4 Discovery kit for IoT node (top view)

.

The blue button B1 located top side is available to be used as a digital input or as alternate wake-up function.

When the button is depressed the logic state is “0”, otherwise the logic state is “1”.

Two green LEDs (LD1 and LD2), located on the top side are available for the user. To light a

LED a high logic state “1” should be written in the corresponding GPIO.

Table 2 gives the assignment of the control ports to the LED indicators.

UM2153 Rev 5

UM2153 Hardware layout and configuration

Reference

LD3

LD4

LD5

LD6

B1

B2

LD1

LD2

LD7

LD8

LD9

Table 2. Button and LED control port

Color Name Comment black blue green green red red green

Reset

Wake-up

LED1

LED2

-

Alternate function Wake-up

PA5 (alternate with ARD.D13)

PB14 yellow blue

LED3 (Wi-Fi)

LED4 (BLE)

PC9, Wi-Fi activity

PC9, Bluetooth activity green 5V Power 5 V available

Bicolor (red and green) ST-LINK COM green when communication

Fault Power Current upper than 750 mA

V

BUS

OCRCR PE3

V

BUS

OK 5 V USB available

7.15 I2C addresses of modules used on MB1297

The

Table 3

displays the I 2 C addresses (read and write) for the modules that are connected to the I2C2 bus.

Modules

HTS221

LIS3MDL

LPS22HB

LSM6DSL

VL53L0X

M24SR64-Y

STSAFE-A100

Table 3. I 2 C addresses for each module

Description SAD[6:0] + R/W

I 2 C write address

Capacitive digital sensor for relative humidity and temperature

3-axis magnetometer

MEMS nano pressure sensor

3D accelerometer and 3D gyroscope

Time-of-Flight ranging and gesture detection sensor

Dynamic NFC/RFID tag IC

-

1011111x

0011110x

1011101x

1101010x

0101001x

1010110x

0100000x

0xBE

0x3C

0xBA

0xD4

0x52

0xAC

0x40

I 2 C read address

0xBF

0x3D

0xBB

0xD5

0x53

0xAD

0x41

UM2153 Rev 5

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56

Connectors

8 Connectors

UM2153

Nine connectors are implemented on the STM32L4 Discovery kit for IoT node:

• CN1, CN2, CN3 and CN4 for ARDUINO

®

Uno V3 connector

• CN5: Tag connector

• CN7: ST-LINK USB connector,

• CN8: ST-LINK debug connector,

• CN9: USB_OTG_FS connector,

• CN10: PMOD™ connector.

In addition, one jumper JP5 is used for I

DD

measurements.

8.1 ARDUINO

®

Uno V3 connectors

CN1, CN2, CN3 and CN4 are female connectors (SMD component devices) compatible with

ARDUINO

®

Uno V3. Most shields designed for ARDUINO

®

can fit to the STM32L4

Discovery kit for IoT node.

Example connector references (see

Figure 17

):

• CN4: Header 6X1_Female_SMD

• CN3: Header 8X1_Female_SMD

• CN2: Header 8X1_Female_SMD

• CN1: Header 10X1_Female_SMD

Figure 17. ARDUINO

®

connector (front view)

&1

&1

&1

&1

06Y9

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UM2153 Rev 5

UM2153 Connectors

Connector

CN2

CN4

CN1

CN3

4

3

2

1

3

7

6

5

2

1

8

Pin number

10

9

5

6

8

7

3

4

1

2

7

8

5

6

3

4

1

2

6

5

4

Table 4. ARDUINO ® connector pinout

Pin name Signal name

STM32 pin

A0

A1

A2

A3

A4

A5

SCL/D15

SDA/D14

AVDD

GND

NC

IOREF

NRST

3.3 V

5V

GND

GND

VIN

SCK/D13

MISO/D12

PWM/MOSI/D

11

PWM/CS/D10

PWM/D9

D8

D7

PWM/D6

PWM/D5

D4

PWM/D3

D2

TX/D1

RX/D0

-

-

STM_NRST

-

-

-

-

-

ARD.A0-ADC

ARD.A1-ADC

ARD.A2-ADC

ARD.A3-ADC

ARD.A4-ADC

ARD.A5-ADC

ARD.D15-I2C1_SCL

ARD.D14-I2C1_SDA

VDDA

GND

ARD.D13-

SPI1_SCK/LED1

ARD.D12-SPI1_MISO

ARD.D11-

SPI1_MISO/PWM

ARD.D10-

SPI_SSN/PWM

ARD.D9-PWM

ARD.D8

ARD.D7

ARD.D6-PWM

ARD.D5-PWM

ARD.D4

ARD.D3-

PWM/INT1_EXTI0

ARD.D2-INT0_EXTI14

ARD.D1-UART4_TX

ARD.D0-UART4_RX

PA15

PB2

PA4

PB1

PB4

PA3

PC5

PC4

PC3

PC2

PC1

PC0

PB8

PB9

-

-

-

-

-

-

-

-

NRST

-

PA5

PA6

PA7

PA2

PB0

PD14

PA0

PA1

Function

-

3.3 V reference

Reset

3.3 V input/output

5V

GND

GND

Power input

ADC

ADC

ADC

ADC

ADC / I2C3_SDA

ADC / I2C3_SCL

I2C1_SCL

I2C1_SDA

VDDA

Ground

SPI1_SCK / LED1

SPI1_MISO

SPI1_MOSI /

TIMxx

TIM2_CH3

TIM2_CH1

GPIO

GPIO

TIM3_CH4

TIM3_CH1

TIMxx

TIM3_CH3 / EXTI0

EXTI14

UART4_TX

UART4_RX

UM2153 Rev 5

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56

Connectors

8.2

UM2153

TAG connector CN5

The TAG connector is implemented on the STM32L4 Discovery kit for IoT node. The TAG connector is a 10-pin footprint supporting SWD mode, which is shared with the same signals as for the ST-LINK.

The TC2050-IDC-NL cable is used to link ST-LINK and TAG connector on the STM32L4

Discovery kit for IoT node, so that the STM32L4 can be easily programmed and debugged without any extra accessory.

Figure 18. TAG connector Figure 19. TC2050-IDC-NL cable

32/57

Connector

CN5

2

8

9

6

7

10

3

4

5

Pin number

1

Table 5. TAG connector pinout

Pin name Signal name

STM32L4 pin

3.3 V

SWD

GND

SWCLK

GND

SWO

NC

NC

NC

NRST

3V3_ST_LINK

SYS_JTMS-SWDIO

-

SYS_JTCK-SWCLK

-

STLINK_JTDO_SWO

-

-

-

STM_NRST

Function

-

PA13

Power

Serial Wire Data

Input/Output

Ground -

PA14 Serial Wire Clock

Ground

PB3

-

-

-

-

-

Serial Wire Output

NRST RESET

UM2153 Rev 5

UM2153 Connectors

8.3 ST-LINK/V2-1 Micro-B

The USB connector is used to connect the embedded ST-LINK/V2-1 to the PC to program and debug the STM32L475VGT6 microcontroller.

Figure 20. USB Micro-B connector CN7 (front view)

Connector

Pin number

CN7

1

4

5

2

3

Table 6. USB Micro-B connector

Pin name Signal name

STM32L4 pin

V

BUS

DM

DP

ID

GND

5V_USB_ST_LINK

USB_STLK_N

USB_STLK_P

USB_STLK_ID

-

-

PA11

PA12

-

-

Function

5 V power and detection

USB diff pair M

USB diff pair P

USB Identification

GND

The ST-LINK debug connector is a 1x4-pin, 2.54-mm pitch male connector. It provides access to the embedded SWJ-DP interface of the STM32F103CBT6 MCU. This SWJ-DP interface is a combined JTAG and serial wire debug port that enables either a serial wire debug or a JTAG probe, to be connected to the target.

Connector Pin number

Table 7. ST-LINK debug connector

Signal name STM32F103CBT6

CN8

1

2

3

4

3V3_ST_LINK

STM_JTCK

GND

STM_JTMS

V

BAT

, V

DDA

, V

DD_1

,

V

DD_2

, V

DD_3

PA14

All GND pins

PA13

Function

3.3 V voltage supply

TCK/SWCLK

GND

JTMS/SWDIO

UM2153 Rev 5

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56

Connectors

8.5 USB OTG FS micro-AB

Figure 21. USB OTG FS Micro-AB connector CN9 (front view)

UM2153

Connector

CN9

Pin number

Table 8. USB OTG FS Micro-AB pinout

Pin names Signal name

STM32L4 pin

1

4

5

2

3

V

BUS

DM

DP

ID

GND

USB_OTG_5V_VBUS

USB_OTG_FS_DM

USB_OTG_FS_DP

USB_OTG_FS_ID

-

PA9

PA11

PA12

PA10

-

Function

5 V power and detection

USB diff pair M

USB diff pair P

USB identification

GND

Table 9. USB OTG FS power management

Pin number Pin names Signal names STM32L4 pin

IC19-3

IC19-4

FAULTn

ENn

USB_OTG_FS_OVRCR_EXTI3

USB_OTG_FS_PWR_EN

PE3

PD12

Function

Over Current IT

USB Power enable

On STM32L4 Discovery kit for IoT node, the PMOD™ connector provides flexibility in small form factor application. Based on PMOD™ Digilent standard popular in connectivity, the

PMOD™ connector is implemented in type 2A and 4A.

The related STM32L475VG I/Os for PMOD™ function are listed in Table 10

. The PMOD™ connector is 2x6 pins with 2.54 mm pitch and right angle female connector.

34/57

UM2153 Rev 5

STM32L4 pin

-

-

-

PD3

PD5

PD6

PD4

-

-

Alternate configuration (UART)

Solder bridge configuration

-

SB14 open;

SB19 close

SB15 open;

SB12 close

SB18 open;

SB20 close

SB21 open;

SB16 close

-

-

-

-

Pin name

Table 10. PMOD™ solder bridge configuration

Standard configuration (SPI)

-

-

-

PMOD-UART2_

CTS/SPI2_MISO

PMOD-UART2_

Tx/SPI2_CSN

PMOD-

UART2_RX

PMOD-UART2_

RTS/SPI2_MOSI

-

-

STM32L4 pin

Solder bridge configuration

-

-

-

PD5

PD4

PD3

PD1

-

-

-

-

-

SB14 close;

SB19 open

SB15 close;

SB12 open

SB18 close;

SB20 open

SB21 close;

SB16 open

-

-

Pin name

-

-

-

PMOD-UART2_

Tx/SPI2_CSN

PMOD-UART2_

RTS/SPI2_MOSI

PMOD-UART2_

CTS/SPI2_MISO

PMOD-

SPI2_SCK

GND

3.3 V

5

6

-

-

-

PMOD™ pin number

-

-

-

1

2

3

4

-

-

-

7 PMOD-IRQ_EXTI2

8

9

10

11

12

Pin name

PMOD-RESET

NC

NC

GND

3.3 V

STM32L4 pin

NC

-

-

-

-

-

PD2

PD0

NC

Connectors

8.7

UM2153

Jumper JP5 for IDD measurements

The STM32 current measurement can be done on JP5. By default a jumper is placed on

JP5.

For current measurement configuration, the jumper on JP5 should be removed and an amp-meters should be placed on JP5.

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UM2153 Rev 5

UM2153 STM32L4 Discovery kit for IoT node I/O assignment

Appendix A STM32L4 Discovery kit for IoT node I/O assignment

Pin

No.

25

26

27

28

29

22

23

24

30

31

16

17

18

19

20

21

10

11

8

9

12

13

14

15

6

7

4

5

1

2

3

Table 11. STM32L4 Discovery kit for IoT node I/O assignment

Pin Name Feature / Comment Signal or Label

PC14/OSC32_IN

PC15/OSC32_OUT

V

SS

V

DD

PH0/OSC_IN

PH1/OSC_OUT

NRST

PC0

PC1

PC2

PC3

V

SSA

V

REF-

V

REF+

V

DDA

PA0

PA1

PA2

PA3

V

SS

V

DD

PA4

PA5

PA6

PE2

PE3

PE4

PE5

PE6

V

BAT

PC13

ADC1_IN2

ADC1_IN3

ADC1_IN4

GND

GND

3.3 V

3.3 V

UART4_TX

UART4_RX

TIM2_CH3

GPIO_Output

GND

3.3 V

GPIO_Output

SPI1_SCK

SPI1_MISO

GPIO_Output

GPIO_EXTI3

GPIO_EXTI4

GPIO_EXTI5

GPIO_EXTI6

Voltage supply

GPIO_EXTI13

RTC CLK

RTC CLK

GND

3.3 V

8MHz CLK

8MHz CLK reset

ADC1_IN1

M24SR64-Y-RF_DISABLE

USB_OTG_OVRCR_EXTI3

M24SR64-Y-GPO

SPSGRF-915-GPIO3_EXTI5

SPBTLE-RF-IRQ_EXTI6

V

BAT

BUTTON_EXTI13

RCC_OSC32_IN

RCC_OSC32_OUT

GND

V

DD_MCU

RCC_OSC_IN

RCC_OSC_OUT

STM_NRST

ARD.A5-ADC

ARD.A4-ADC

ARD.A3-ADC

ARD.A2-ADC

GND

GND

V

DDA

V

DDA

ARD.D1-UART4_TX

ARD.D0-UART4_RX

ARD.D10-SPI_SSN/PWM

ARD.D4

V

SS

V

DD_MCU

ARD.D7

ARD.D13-SPI1_SCK/LED1

ARD.D12-SPI1_MISO

UM2153 Rev 5

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56

STM32L4 Discovery kit for IoT node I/O assignment UM2153

PD14

PD15

PC6

PC7

PC8

PB13

PB14

PB15

PD8

PD9

PD10

PD11

PD12

PD13

PE8

PE9

PE10

PE11

PE12

PE13

PE14

PE15

PB10

PB11

V

SS

V

DD

PB12

PA7

PC4

PC5

PB0

PB1

PB2

PE7

Pin

No.

55

56

57

58

59

60

49

50

51

52

53

54

61

62

63

64

65

43

44

45

46

47

48

39

40

41

42

35

36

37

38

32

33

34

Table 11. STM32L4 Discovery kit for IoT node I/O assignment (continued)

Pin Name Feature / Comment

SPI1_MOSI

ADC1_IN13

ADC1_IN14

TIM3_CH3

TIM3_CH4

GPIO_Output

MEMS microphone

GPIO_Output

MEMS microphone

QSPI NOR Flash memory

QSPI NOR Flash memory

QSPI NOR Flash memory

QSPI NOR Flash memory

QSPI NOR Flash memory

QSPI NOR Flash memory

I2C2_SCL

I2C2_SDA

GND

3.3 V

GPIO_Output

GPIO_Output

GPIO_Output

GPIO_Output

USART3_TX

USART3_RX

GPIO_EXTI10

GPIO_EXTI11

GPIO_EXTI12

GPIO_Output

GPIO_EXTI14

GPIO_EXTI15

GPIO_Output

GPIO_EXTI7

GPIO_EXTI8

Signal or Label

ARD.D11-SPI1_MOSI/PWM

ARD.A1-ADC

ARD.A0-ADC

ARD.D3-PWM/INT1_EXTI0

ARD.D6-PWM

ARD.D8

DFSDM1_DATIN2

ISM43362-RST

DFSDM1_CKOUT

QUADSPI_CLK

QUADSPI_NCS

QUADSPI_BK1_IO0

QUADSPI_BK1_IO1

QUADSPI_BK1_IO2

QUADSPI_BK1_IO3

INTERNAL-I2C2_SCL

INTERNAL-I2C2_SDA

V

SS

V

DD_MCU

ISM43362-BOOT0

ISM43362-WAKEUP

LED2

SPSGRF-915-SDN

INTERNAL-UART3_TX

INTERNAL-UART3_RX

LPS22HB_INT_DRDY_EXTI10

LSM6DSL_INT1_EXTI11

USB_OTG_FS_PWR_EN

SPBTLE-RF-SPI3_CSN

ARD.D2-INT0_EXTI14

HTS221_DRDY_EXTI15

VL53L0X_XSHUT

VL53L0X_GPIO1_EXTI7

LIS3MDL_DRDY_EXTI8

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UM2153 Rev 5

UM2153 STM32L4 Discovery kit for IoT node I/O assignment

Table 11. STM32L4 Discovery kit for IoT node I/O assignment (continued)

Pin Name

PB3

PB4

PB5

PB6

PB7

BOOT0

PB8

PB9

PE0

PE1

PD2

PD3

PD4

PD5

PD6

PD7

PA15

PC10

PC11

PC12

PD0

PD1

PC9

PA8

PA9

PA10

PA11

PA12

PA13

V

DDUSB

V

SS

V

DD

PA14

Pin

No.

92

93

94

95

96

89

90

91

97

98

83

84

85

86

87

88

77

78

79

80

81

82

73

74

75

76

69

70

71

72

66

67

68

Feature / Comment

GPIO_EXTI2

USART2_CTS

USART2_RTS

USART2_TX

USART2_RX

GPIO_Output

ST-LINK

TIM3_CH1

GPIO_Output

USART1_TX

USART1_RX

Boot

I2C1_SCL

I2C1_SDA

GPIO_Output

GPIO_EXTI1

GPIO_EXTI9

GPIO_Output

USB_OTG

USB_OTG

USB_OTG

USB_OTG

ST-LINK

3.3 V

GND

3.3 V

ST-LINK

TIM2_CH1

SPI3_SCK

SPI3_MISO

SPI3_MOSI

GPIO_Output

GPIO_Output

Signal or Label

LED3 (WIFI) & LED4 (BLE)

SPBTLE-RF-RST

USB_OTG_FS_VBUS

USB_OTG_FS_ID

USB_OTG_FS_DM

USB_OTG_FS_DP

SYS_JTMS-SWDIO

V

DD_MCU

GND

V

DD_MCU

SYS_JTCK-SWCLK

ARD.D9-PWM

INTERNAL-SPI3_SCK

INTERNAL-SPI3_MISO

INTERNAL-SPI3_MOSI

PMOD-RESET

PMOD-SPI2_SCK

PMOD-IRQ_EXTI2

PMOD-UART2_CTS/SPI2_MISO

PMOD-UART2_RTS/SPI2_MOSI

PMOD-UART2_TX/SPI2_CSN

PMOD-UART2_RX

STSAFE-A100-RESET

SYS_JTDO-SWO

ARD.D5-PWM

SPSGRF-915-SPI3_CSN

ST-LINK-UART1_TX

ST-LINK-UART1_RX

BOOT0

ARD.D15-I2C1_SCL

ARD.D14-I2C1_SDA

ISM43362-SPI3_CSN

ISM43362-DRDY_EXTI1

UM2153 Rev 5

39/57

56

STM32L4 Discovery kit for IoT node I/O assignment UM2153

Pin

No.

99

100

Table 11. STM32L4 Discovery kit for IoT node I/O assignment (continued)

Pin Name

V

SS

V

DD

Feature / Comment

GND

3.3 V

Signal or Label

GND

V

DD_MCU

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UM2153 Rev 5

UM2153

Appendix B Schematics

Schematics

This section provides the design schematics for the STM32L4 Discovery kit for IoT node:

• Overall schematics for the B-L475E-IOT01A, see

Figure 22

•

STM32L475VG MCU, see Figure 23

and

Figure 24

•

USB OTG FS, see Figure 25

• RF Module, see

Figure 26

•

ST-MEMS sensors, see Figure 27

• NFC and STSAFE Part, see

Figure 28

•

Power supply, see Figure 29

• ARDUINO ® Uno V3 connector, see

Figure 30

•

Peripherals, see Figure 31

• ST-LINK with support of SWD only, see

Figure 32

UM2153 Rev 5

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56

RF Modules Page 5/11

MB1297_RF_Module.SchDoc

INTERNAL-SPI3_SCK

INTERNAL-SPI3_MOSI

INTERNAL-SPI3_MISO

SPSGRF-915-SPI3_CSN

SPSGRF-915-GPIO3_EXTI5

SPSGRF-915-SDN

SPBTLE-RF-SPI3_CSN

SPBTLE-RF-RST

SPBTLE-RF-IRQ_EXTI6

ISM43362-SPI3_CSN

ISM43362-RST

ISM43362-WAKEUP

ISM43362-BOOT0

ISM43362-DRDY_EXTI1

INTERNAL-UART3_RX

INTERNAL-UART3_TX

QUADSPI_NCS

QUADSPI_CLK

QUADSPI_BK1_IO0

QUADSPI_BK1_IO1

QUADSPI_BK1_IO2

QUADSPI_BK1_IO3

NFC & ST-SAFE Page 7/11

MB1297_NFC_SAFE.SchDoc

INTERNAL-I2C2_SCL

INTERNAL-I2C2_SDA

M24SR64-Y-GPO

M24SR64-Y-RF_DISABLE

STSAFE-A100-RESET

MEMS Part Page 6/11

MB1297_MEMS.SchDoc

INTERNAL-I2C2_SCL

INTERNAL-I2C2_SDA

LSM6DSL_INT1_EXTI11

LSM3MDL_DRDY_EXTI8

LPS22HB_INT_DRDY_EXTI10

HTS221_DRDY_EXTI15

VL53L0X_GPIO1_EXTI7

VL53L0X_XSHUT

DFSDM1_CKOUT

DFSDM1_DATIN2

USB_OTG_FS Page 4/11

MB1297_USB_OTG_FS.SchDoc

USB_OTG_FS_OVRCR_EXTI3

USB_OTG_FS_PWR_EN

USB_OTG_FS_VBUS

USB_OTG_FS_DM

USB_OTG_FS_DP

USB_OTG_FS_ID

Figure 22. STM32L4 Discovery kit for IoT node (top)

MCU1 Page 2/11

MB1297_MCU1.SchDoc

INTERNAL-SPI3_SCK

INTERNAL-SPI3_MOSI

INTERNAL-SPI3_MISO

SPSGRF-915-SPI3_CSN

SPSGRF-915-GPIO3_EXTI5

SPSGRF-915-SDN

SPBTLE-RF-SPI3_CSN

SPBTLE-RF-RST

SPBTLE-RF-IRQ_EXTI6

ISM43362-SPI3_CSN

ISM43362-RST

ISM43362-WAKEUP

ISM43362-BOOT0

ISM43362-DRDY_EXTI1

INTERNAL-UART3_RX

INTERNAL-UART3_TX

QUADSPI_NCS

QUADSPI_CLK

QUADSPI_BK1_IO0

QUADSPI_BK1_IO1

QUADSPI_BK1_IO2

QUADSPI_BK1_IO3

ARD.D15-I2C1_SCL

ARD.D14-I2C1_SDA

ARD.D13-SPI1_SCK/LED1

ARD.D12-SPI1_MISO

ARD.D11-SPI1_MOSI/PWM

ARD.D10-SPI_SSN/PWM

ARD.D9-PWM

ARD.D8

ARD.D7

ARD.D6-PWM

ARD.D5-PWM

ARD.D4

ARD.D3-PWM/INT1_EXTI0

ARD.D2-INT0_EXTI14

ARD.D1-UART4_TX

ARD.D0-UART4_RX

ARD.A5-ADC

ARD.A4-ADC

ARD.A3-ADC

ARD.A2-ADC

ARD.A1-ADC

ARD.A0-ADC

INTERNAL-I2C2_SCL

INTERNAL-I2C2_SDA

M24SR64-Y-GPO

M24SR64-Y-RF_DISABLE

STSAFE-A100-RESET

LSM6DSL_INT1_EXTI11

LSM3MDL_DRDY_EXTI8

LED2

LED3(WIFI) & LED4(BLE)

BUTTON_EXTI13

PMOD-UART2_RX

PMOD-UART2_TX/SPI2_CSN

LPS22HB_INT_DRDY_EXTI10 PMOD-UART2_RTS/SPI2_MOSI

HTS221_DRDY_EXTI15

VL53L0X_GPIO1_EXTI7

PMOD-UART2_CTS/SPI2_MISO

PMOD-SPI2_SCK

VL53L0X_XSHUT PMOD-IRQ_EXTI2

PMOD-RESET

DFSDM1_CKOUT

DFSDM1_DATIN2

USB_OTG_FS_OVRCR_EXTI3

USB_OTG_FS_PWR_EN

USB_OTG_FS_VBUS

USB_OTG_FS_DM

USB_OTG_FS_DP

USB_OTG_FS_ID

SYS_JTCK-SWCLK

SYS_JTMS-SWDIO

SYS_JTDO-SWO

ST-LINK-UART1_RX

ST-LINK-UART1_TX

STM_NRST

MB1297_MCU2.SchDoc

MCU2 Page 3/11

Arduino Connectors Page 9/11

MB1297_Arduino.SchDoc

ARD.D15-I2C1_SCL

ARD.D14-I2C1_SDA

ARD.D13-SPI1_SCK/LED1

ARD.D12-SPI1_MISO

ARD.D11-SPI1_MOSI/PWM

ARD.D10-SPI_SSN/PWM

ARD.D9-PWM

ARD.D8

ARD.D7

ARD.D6-PWM

ARD.D5-PWM

ARD.D4

ARD.D3-PWM/INT1_EXTI0

ARD.D2-INT0_EXTI14

ARD.D1-UART4_TX

ARD.D0-UART4_RX

ARD.A5-ADC

ARD.A4-ADC

ARD.A3-ADC

ARD.A2-ADC

ARD.A1-ADC

ARD.A0-ADC

STM_NRST

Peripherals Page 10/11

MB1297_Peripherals.SchDoc

ARD.D13-SPI1_SCK/LED1

STM_NRST

LED2

LED3(WIFI) & LED4(BLE)

BUTTON_EXTI13

PMOD-UART2_RX

PMOD-UART2_TX/SPI2_CSN

PMOD-UART2_RTS/SPI2_MOSI

PMOD-UART2_CTS/SPI2_MISO

PMOD-SPI2_SCK

PMOD-IRQ_EXTI2

PMOD-RESET

STLink V2.1 Page 11/11

MB1297_STLINK_V2-1.SCHDOC

SYS_JTCK-SWCLK

SYS_JTMS-SWDIO

SYS_JTDO-SWO

ST-LINK-UART1_RX

ST-LINK-UART1_TX

STM_NRST

Power part Page 8/11

MB1297_POWER.SchDoc

MB1297 Title: IOT Node Discovery Kit

Project: Project

Size: A4 Reference: MB1297

Date: 29/01/2017

Revision: D

Sheet: 1 of 11

Designed by DiZiC

Figure 23. STM32L475VG microcontroller

USB_OTG_FS_DM

USB_OTG_FS_DP

USB_N

USB_P

ARD.D1-UART4_TX

ARD.D0-UART4_RX

ARD.D10-SPI_SSN/PWM

ARD.D4

ARD.D7

ARD.D13-SPI1_SCK/LED1

ARD.D12-SPI1_MISO

ARD.D11-SPI1_MOSI/PWM

SPBTLE-RF-RST

USB_OTG_FS_VBUS

USB_OTG_FS_ID

SYS_JTMS-SWDIO

SYS_JTCK-SWCLK

ARD.D9-PWM

ARD.A5-ADC

ARD.A4-ADC

ARD.A3-ADC

ARD.A2-ADC

ARD.A1-ADC

ARD.A0-ADC

VL53L0X_XSHUT

VL53L0X_GPIO1_EXTI7

70

71

72

76

77

32

67

68

69

23

24

25

26

29

30

31

U1A

PA0/WKUP1

PA1

PA2

PA3

PA4

PA5

PA6

PA7

PA8

PA9

PA10

PA11

PA12

PA13/SWDIO

PA14/SWCLK

PA15

PB0

PB1

PB2

PB3/SWO

PB4

PB5

PB6

PB7

PB8

PB9

PB10

PB11

PB12

PB13

PB14

PB15

15

16

17

18

33

34

63

64

PC0

PC1

PC2

PC3

PC4

PC5

PC6

PC7

PC8

PC9

PC10

PC11

PC12

PC13/WKUP2

PC14-OSC32_IN

PC15-OSC32_OUT

STM32L475VGTx

90

91

92

93

95

35

36

37

89

96

47

48

51

52

53

54

65

66

78

7

8

9

79

80

PMOD-RESET

PMOD-SPI2_SCK

PMOD-IRQ_EXTI2

PMOD-UART2_CTS/SPI2_MISO

PMOD-UART2_RTS/SPI2_MOSI

PMOD-UART2_TX/SPI2_CSN

PMOD-UART2_RX

STSAFE-A100-RESET

INTERNAL-UART3_TX

INTERNAL-UART3_RX

LPS22HB_INT_DRDY_EXTI10

LSM6DSL_INT1_EXTI11

USB_OTG_FS_PWR_EN

SPBTLE-RF-SPI3_CSN

ARD.D2-INT0_EXTI14

HTS221_DRDY_EXTI15

81

82

83

84

85

86

87

88

55

56

57

58

59

60

61

62

U1B

PD0

PD1

PD2

PD3

PD4

PD5

PD6

PD7

PD8

PD9

PD10

PD11

PD12

PD13

PD14

PD15

PE7

PE8

PE9

PE10

PE11

PE12

PE13

PE14

PE15

PE0

PE1

PE2

PE3

PE4

PE5

PE6

STM32L475VGTx

97

2

3

98

1

4

5

38

39

40

41

42

43

44

45

46

ARD.D3-PWM/INT1_EXTI0

ARD.D6-PWM

ARD.D8

SYS_JTDO-SWO

ARD.D5-PWM

SPSGRF-915-SPI3_CSN

ST-LINK-UART1_TX

ST-LINK-UART1_RX

R8

2K2

3V3

R9

2K2

ISM43362-BOOT0

ISM43362-WAKEUP

LED2

SPSGRF-915-SDN

R11

2K2

LSM3MDL_DRDY_EXTI8

LED3(WIFI) & LED4(BLE)

INTERNAL-SPI3_SCK

INTERNAL-SPI3_MISO

INTERNAL-SPI3_MOSI

BUTTON_EXTI13

R12

0R

3V3

C14

GND

5.1pF

X2

NX3215SA-32.768K

C15

GND

5.1pF

R10

2K2

ARD.D15-I2C1_SCL

ARD.D14-I2C1_SDA

INTERNAL-I2C2_SCL

INTERNAL-I2C2_SDA

ISM43362-SPI3_CSN

ISM43362-DRDY_EXTI1

M24SR64-Y-RF_DISABLE

USB_OTG_FS_OVRCR_EXTI3

M24SR64-Y-GPO

SPSGRF-915-GPIO3_EXTI5

SPBTLE-RF-IRQ_EXTI6

DFSDM1_DATIN2

ISM43362-RST

DFSDM1_CKOUT

QUADSPI_CLK

QUADSPI_NCS

QUADSPI_BK1_IO0

QUADSPI_BK1_IO1

QUADSPI_BK1_IO2

QUADSPI_BK1_IO3

Title: STM32L475 - 1/2

Project:

Size: A4 Reference: MB1297

Date: 29/01/2017

Revision: D

Sheet: 2 of 11

Designed by DiZiC

Figure 24. STM32L475VG microcontroller

STM_NRST

C3

100nF

GND

Not Fitted (8.2pF)

C2

GND

Not Fitted (0R)

R5

C4

GND

Not Fitted (8.2pF)

X1

Not Fitted (NX3225GD-8.00M)

R7

Not Fitted (0R)

L1

VDD_MCU

FCM1608KF-601T03

GND

C5

100nF

GND

C6

1uF

Close

SB17

VBAT

VDD_MCU

GND

C8

1uF

VDDA

12

13

U1C

PH0/PF0-OSC_IN

PH1/PF1-OSC_OUT

22

21

VDDA

VREF+

6

VBAT

50

75

100

28

11

VDD_MCU

VDD

VDD

VDD

VDD

VDD

STM32L475VGTx

NRST

BOOT0

VSSA

VREF-

VDDUSB

VSS

VSS

VSS

VSS

VSS

14

94

19

20

73

74

10

27

49

99

GND

GND

GND

GND

C7

100nF

VDD_MCU

SB9

Open

SB13

Close

VDD_MCU

GND

VDD_MCU

GND

C9

100nF

C10

100nF

C11

100nF

C12

100nF

C13

100nF

Title: STM32L475 - 2/2

Project: Project

Size: A4 Reference: MB1297

Date: 29/01/2017

Revision: D

Sheet: 3 of 11

Designed by DiZiC

Figure 25. USB OTG FS

USB_OTG_FS_OVRCR_EXTI3

USB_OTG_FS_PWR_EN

3V3

VBUS OVRCR LED

R56

1K

LD8

RED

LED

3V3

R58

47K

5V_USB_FS

3V3

R62

47K

5V GND

2

5

4

U19

GND

IN

EN

FAULT

OUT

STMPS2141STR

3

1

GND

C66

4.7uF

R61

0R

VBUS OK LED

R57

47K

1 Q2

BSR14

R55

330R

LD9

GREEN

LED

R59

100K GND

GND

3V3

3

4

5

1

2

CN9

VBUS

DM

DP

ID

GND

GND

8

9

6

7

10

Shield

Shield

Shield

Shield

EXP

475900001

USB_OTG_FS_VBUS

USB_OTG_FS_DM

USB_OTG_FS_DP

USB_OTG_FS_ID

USB_N

USB_P

B3

C3

D3

A2

B2

U20

Vbus

D+out

D-out

Dz

Pup

ID

D+in

D-in

Pd1

Pd2

A3

C1

D1

B1

C2

GND

EMIF02-USB03F2

D2

GND

ESD PROTECTION SHOULD BE CLOSE TO THE CONNECTOR

Title: USB_OTG_FS

Project:

Size: A4 Reference: MB1297

Date: 29/01/2017

Revision: D

Sheet: 4 of 11

Designed by DiZiC

Figure 26. RF module

INTERNAL-SPI3_SCK

INTERNAL-SPI3_MISO

INTERNAL-SPI3_MOSI

SPBTLE-RF-SPI3_CSN

SPBTLE-RF-IRQ_EXTI6

SPBTLE-RF-RST

9

10

7

8

M1

4

2

11

BT Module

5

3V3

GND

C43

100nF

3

1

6

GND

INTERNAL-SPI3_SCK

INTERNAL-SPI3_MISO

INTERNAL-SPI3_MOSI

SPSGRF-915-SPI3_CSN

SPSGRF-915-GPIO3_EXTI5

SPSGRF-915-SDN

3

4

1

2

11

7

8

9

10

M3

SPSGRF

5

3V3

GND

C45

100nF

6

GND

QUADSPI_NCS

QUADSPI_CLK

QUADSPI_BK1_IO0

QUADSPI_BK1_IO1

QUADSPI_BK1_IO2

QUADSPI_BK1_IO3

5

2

1

6

3

7

U11

CS#

SCLK

SI/SIO0

SO/SIO1

VCC

GND

WP#/SIO2

RESET#/SOI3

MX25R6435F

3V3

8

4

GND GND

C48

100nF

5V

LT1963EST-3.3

U12

GND

C49

10uF

1

IN

GND

OUT

3

3V3_WIFI

GND

C50

10uF

GND

C75

2.2uF

INTERNAL-SPI3_MOSI

INTERNAL-SPI3_MISO

INTERNAL-SPI3_SCK

ISM43362-SPI3_CSN

3V3_WIFI

GND

C44

100nF

GND

TP6

GND

TP1

TP2

TP3

TP4

TP5

9

10

11

12

13

7

8

3

4

1

2

5

6

GND

VDD

GND

TMS

TCK

TDI

TDO

TRSTN

ADC4/MOSI

ADC3/MISO

ADC2/SCK

ADC1/SSN

ADC0/DATARDY

R26

47K

3V3

3V3_WIFI

ISM43362-DRDY_EXTI1

GND

C76

2.2uF

GND

C47

100nF

GND GND

ISM43362-WAKEUP

INTERNAL-UART3_TX

INTERNAL-UART3_RX

ISM43362-BOOT0

ISM43362-RST

GND

ISM43362-M3G-L44

M2

GND

RSTN

BOOT0

RES

RES

RES

CFG1

CFG0

GPIO4

GPIO3

GPIO2

GPIO1

GPIO0

31

30

29

28

27

26

25

24

23

35

34

33

32

GND

3V3_WIFI 3V3_WIFI GND

Title: RF Modules

Project:

Size: A4 Reference: MB1297

Date: 29/01/2017

Revision: D

Sheet: 5 of 11

Designed by DiZiC

Figure 27. ST-MEMS sensors

INTERNAL-I2C2_SCL

INTERNAL-I2C2_SDA

LSM6DSL_INT1_EXTI11

GND

3V3

3V3 3V3

13

U3

SCL

14

SDA

VDD

VDDIO

8

5

1

SDO/SA0

12

CS nc nc

4

9

6

INT1

INT2

GND

GND

LSM6DSL

Read=11010101 (D5h)

Write=11010100 (D4h)

SCx

SDx

GND

10

11

3

2

7

GND

C18 C19 C20

4.7uF

100nF 100nF

GND GND GND

INTERNAL-I2C2_SCL

INTERNAL-I2C2_SDA

LSM3MDL_DRDY_EXTI8

INTERNAL-I2C2_SCL

INTERNAL-I2C2_SDA

LPS22HB_INT_DRDY_EXTI10

3V3

3V3

1

11

9

10

7

8

U5

SCL/SPC VDD_IO

SDA/SDI/SDO VDD

SDO/SA1

CS

INT

DRDY

C1

GND

Res

Res

LIS3MDL

Read=00111101 (3Dh)

Write=00111100 (3Ch)

3V3 3V3

6

5

4

3

2

12

C23 C24 C25 C26

GND

100nF

GND

1uF

GND

100nF 100nF

GND GND

3V3 3V3 U7

6

2

4

5

7

CS VDD_IO

SCL/SPC

SDA/SDI/SDO

SDO/SA0

VDD

RES

GND

INT_DRDY GND

1

10

3

8

9

LPS22HB

Read=10111011 (BBh)

Write=10111010 (BAh)

C29 C30 C31

100nF 4.7uF

GND GND

100nF

GND

DFSDM1_CKOUT

DFSDM1_DATIN2

R6

0R

R13

0R

INTERNAL-I2C2_SCL

INTERNAL-I2C2_SDA

VL53L0X_XSHUT

VL53L0X_GPIO1_EXTI7

INTERNAL-I2C2_SCL

INTERNAL-I2C2_SDA

HTS221_DRDY_EXTI15

R14

10K

3V3

3

Microphone MEMS

U2

CLK

4

DOUT

VDD

LR

GND

MP34DT01-M

1

2

5

3V3

C17 C16

10uF

GND GND GND

3

Microphone MEMS

U10

4

CLK

DOUT

VDD

LR

GND

MP34DT01-M

1

2

5

3V3

R67

C74

10K

C46

GND

100nF 10uF

GND GND

3V3

R15

10K

10

9

5

7

8

U4

SCL

SDA

AVDD_VCSEL

AVDD

AVSS_VCSEL

XSHUT

GND

GND2

GPIO1

DNC

GND3

GND4

VL53L0X

Read=01010011(53h)

Write=01010010(52h)

1

11

2

3

4

6

12

GND

3V3

C21

4.7uF

C22

100nF

GND GND

3V3

2

4

U6

SCL/SPC VDD

SDA/SDI/SDO

6

CS

3

DRDY GND

HTS221

Read=10111111 (BFh)

Write=10111110 (BEh)

1

5

GND

3V3

C27 C28

2.2uF

100nF

GND GND

Title: MEMS Sensors

Project:

Size: A4 Reference: MB1297

Date: 29/01/2017

Revision: D

Sheet: 6 of 11

Designed by DiZiC

Figure 28. NFC and STSAFE part

INTERNAL-I2C2_SCL

INTERNAL-I2C2_SDA

M24SR64-Y-GPO

M24SR64-Y-RF_DISABLE

R1

30K

GND

R4

20K

3V3

6

5

U8

SCL

SDA

VCC

VSS

7

1

GPO

RFDIS

AC0

AC1

M24SR64-Y

Read=10101101(ADh)

Write=10101100(ACh)

2

3

8

4

GND

GND

C67

100pF

GND

C68

1uF

GND

C32

100nF

10pF

GND

C53

GND

C69

Not Fitted

10pF

GND

C71

GND

C72

Not Fitted

742792042

L2

3V3

ANT

PCB Antenna 15x15mm

See ANT7-T-M24SR-MB1255

C70

Not Fitted

INTERNAL-I2C2_SCL

INTERNAL-I2C2_SDA

STSAFE-A100-RESET

7

5

U9

SCL

SDA

1

VCC

NC

NC

NC

/RESET

GND

2

3

6

8

4

GND

STSAFE-A100 (Not Fitted)

Read=01000001(41h)

Write=01000000(40h)

3V3

GND

C33

100nF

Title: NFC & ST-SAFE Part

Project:

Size: A4 Reference: MB1297

Date: 12/03/2017

Revision: D

Sheet: 7 of 11

Designed by DiZiC

USB_OTG_FS Page4/11 STLINK_V2-1 Page11/11

POWER SUPPLY Page8/11

3V3

5V

3V3

3V3

ARDUINO Page9/11 MCU1&2 Page2&3/11 Peripherals Page10/11

Figure 29. Power supply

MEMS Page6/11

RF_Module Page5/11

NFC_SAFE Page7/11

5V PWR SELECTION FROM EXTERNAL SOURCES

5V_ST_LINK

5V_ARD

5V_USB_FS

5V_USB_CHARGER

5V

5V_VBAT

7

9

1

3

5

JP4

6

8

2

4

10

HEADER_2X5

R25

HW1

Cannot open file

C:\Data

SHUNT_BK

330R

+5V

LED

LD5

GREEN

GND

GND PROBE

GND

JP6

HW3

Cannot open file

C:\Data

SHUNT_BK

GND GND

JP7

HW4

Cannot open file

C:\Data

SHUNT_BK

GND

5V INPUT PWR FROM ARDUINO

5V / 800mA

From Arduino power pin

VIN

3

C38

10uF

U13 LD1117S50TR

Vin Vout

Tab

2

4

GND GND GND

C39

10uF

5V_ARD

3V3 PWR

3V3 / 800mA

5V

GND

3

C40

10uF

U14

LD1117S33TR

Vin Vout

Tab

2

4

LDO_3V3

C41

10uF

Close

SB4

GND

3V3

HW2

Cannot open file

C:\Data

SHUNT_BK

IDD

C42

100nF

GND GND

Open solder bridge if Discovery is supplied from +3V3 of extension connector

VDD_MCU

JP5

Jumper to measure IDD of the MCU

Title: POWER SUPPLY

Project:

Size: A4 Reference: MB1297

Date: 29/01/2017

Revision: D

Sheet: 8 of 11

Designed by DiZiC

Figure 30. ARDUINO ® Uno V3 connector

ARDUINO UNO connector

R3 1k

5V_ARD

STM_NRST

3V3

5V

GND

WARNING voltage applied to VIN <11.5V

VIN

CN2

5

6

7

8

1

2

3

4

IOREF

NRST

3V3

5V

GND

GND

VIN

Header 8X1_Female_SMD

ARD.A0-ADC

ARD.A1-ADC

ARD.A2-ADC

ARD.A3-ADC

ARD.A4-ADC

ARD.A5-ADC

CN4

3

4

5

6

1

2

A0

A1

A2

A3

A4

A5

Header 6X1_Female_SMD

SCL/D15

SDA/D14

AVDD

GND

SCK/D13

MISO/D12

PWM/MOSI/D11

PWM/CS/D10

PWM/D9

D8

CN1

10

9

8

7

6

5

4

3

2

1

GND

Header 10X1_Female_SMD

ARD.D15-I2C1_SCL

ARD.D14-I2C1_SDA

ARD.D13-SPI1_SCK/LED1

ARD.D12-SPI1_MISO

ARD.D11-SPI1_MOSI/PWM

ARD.D10-SPI_SSN/PWM

ARD.D9-PWM

ARD.D8

R2

0R

VDDA

GND

C1

100nF

D7

PWM/D6

PWM/D5

D4

PWM/D3

D2

TX/D1

RX/D0

CN3

3

2

1

5

4

8

7

6

Header 8X1_Female_SMD

ARD.D7

ARD.D6-PWM

ARD.D5-PWM

ARD.D4

ARD.D3-PWM/INT1_EXTI0

ARD.D2-INT0_EXTI14

ARD.D1-UART4_TX

ARD.D0-UART4_RX

Title: Arduino Uno connector

Project:

Size: A4 Reference: MB1297

Date: 29/01/2017

Revision: D

Sheet: 9 of 11

Designed by DiZiC

RESET BUTTON

STM_NRST

Close

SB2

GND

R19

1K

C34

100nF

B1

GND

C35

10pF

SW-PUSH-CMS_BLACK

GND

100nF should be place close to the MCU

10pF and 1K should be place close to the button

USER LED

The 2 LEDs are top side

GND

ARD.D13-SPI1_SCK/LED1

Close

SB1

GND

R16

10K

R38

200K

C73

3V3

100nF

1

3

5

U21

VCC+

2

VCC-

4

GND

TSV631AILT

R18

1K

LD1

LED

GND

GREEN

LED2

LED3(WIFI) & LED4(BLE)

R20

330R

R21

1K

R22

680R

LD2 LED

GND

GREEN

LD3

LD4

WIFI

LED

GND

YELLOW

LED

3V3

BLUE

BLE

Figure 31. Peripherals

USER & WAKE-UP Button

BUTTON_EXTI13

3V3

Close

SB3

R23

100K

GND

R24

1K

C36

100nF

B2

GND

C37

10pF

SW-PUSH-CMS_BLUE

GND

100nF should be place close to the MCU

10pF and 1K should be place close to the button

PMOD

PMOD-UART2_TX/SPI2_CSN

PMOD-UART2_RTS/SPI2_MOSI

PMOD-UART2_CTS/SPI2_MISO

Open Close

Close Open

Open Close

SB21

Close

SB20

Open

GND

3V3

1

2

3

4

5

6

CN10

7

8

9

10

PMOD-IRQ_EXTI2

11

12

GND

3V3

HEADER_2X6_PMOD

PMOD-RESET

PMOD-SPI2_SCK

PMOD-UART2_RX

Title: Peripherals

Project:

Size: A4 Reference: MB1297

Date: 29/01/2017

Revision: D

Sheet: 10 of 11

Designed by DiZiC

Figure 32. ST-LINK/V2-1 with support of SWD only

ST-LINK MCU

Board Ident: PC13=0

10K

R31

GND

GND

R36

Not Fitted (10K)

GND

3V3_ST_LINK

GND

GND

GND

C51

10pF

1

X3

2

GND

C52

10pF

NX3225GD-8.00M

3V3_ST_LINK

C54

100nF R40

4K7

OSC_IN

OSC_OUT

STM_RST

GND

AIN_1

JP8 GND

R41

4K7

GND

GND

ST-LINK-UART1_RX

ST-LINK-UART1_TX

R42

0R

R43

0R

3

4

1

2

5

6

7

10

11

8

9

12

CN6

Fitted: NO

1

2

VBAT

PC13

PC14

PC15

OSCIN

OSCOUT

NRST

VSSA

VDDA

PA0

PA1

PA2

R27

R29

4K7

100K

R28

2K7

D2

BAT60JFILM

R30

Not Fitted (0R)

5V

3V3_ST_LINK

T_JTMS

SB5

T_JTCK

SB6

T_SWO SB7

T_NRST

SB8

Close

Close

Close

Close

SYS_JTMS-SWDIO

SYS_JTCK-SWCLK

SYS_JTDO-SWO

STM_NRST

USB_RENUMn

STM_JTCK

R32

22R

R33

22R

R34

22R

R35

22R

VDD_2

VSS_2

JTMS/SWDIO

PA12

PA11

PA10

PA9

PA8

PB15

PB14

PB13

PB12

GND GND

36

35

34

33

32

31

30

29

28

27

26

25

U15

STM32F103CBT6

3V3_ST_LINK

STM_JTMS

USB_STLK_P

USB_STLK_N

T_SWO

LED_STLINK

PWR_ENn

T_JTMS

T_JTCK

T_SWDIO_IN

GND

R39

100R

3V3_ST_LINK

3V3_ST_LINK

CN5

3

4

1

2

5

GND

Fitted: NO TC2050-IDC-NL

SWD INTERFACE

ST-LINK POWER 3V3 / 150mA

8

7

10

9

6

5V_ARD

3V3_ST_LINK

C60

100nF

GND

C61

100nF

GND

C62

100nF

GND

C63

100nF

GND

5V_USB_ST_LINK

5V_USB_FS

D3

D4

D5

BAT60JFILM

BAT60JFILM

BAT60JFILM

Only footprint with Cable: TC2050-IDC-NL

SB10

Close

C56

1uF

GND

1

U16 LD3985M33R

Vin Vout

5

3V3_ST_LINK

3

INH

GND

C57

100nF

GND

BYPASS

C58

10nF

C59

1uF

C55

100nF

GND GND GND GND

3V3_ST_LINK

ST-LINK USB CONNECTOR STLINK_LED

Q1

1

R45

100R USB_RENUMn

BSR14

R46 36K

GND

R48 10K

R50

1K5

5V_USB_ST_LINK

5V_USB_CHARGER

CN7

VBUS

DM

DP

ID

GND

3

4

5

1

2 USB_STLK_N

USB_STLK_P

USB_STLK_ID

1050170001

Shield

Shield

Shield

Shield

EXP

EXP

6

7

8

9

10

11

GND

GND

A3

C1

D1

B1

C2

U18

ID

D+in

D-in

Pd1

Pd2

Vbus

D+out

D-out

Dz

Pup

D2

GND

EMIF02-USB03F2

ESD PROTECTION SHOULD BE CLOSE TO THE CONNECTOR

B3

C3

D3

A2

B2 R54

100K

GND

1

LD6

Red

GND

2

R44

330R

3V3_ST_LINK

4 3

R47

330R

_Green

LD_BICOLOR_CMS

ST-LINK DEBUG

SWCLK

STM_JTCK

3V3_ST_LINK

GND

SWDIO

STM_JTMS

CN8 Header 4 pins

Fitted: NO

Must be on a border or the PCB.

LED_STLINK

ST LINK USB Power switch 5V / 1.2A

5V_USB_ST_LINK

C64

1uF

R51 R52 R49

LD7

GND

PWR_ENn

LED

RED

5V_ST_LINK

SB11

1

2

Ilim = 625mA

1.2Ilim = 750mA < Isc

1.5Ilim = 938mA > Isc

U17

IN

IN

OUT

OUT

8

FAULT SET

6

7

5

Open

R53

2K2 3

ON

ST890CDR

GND

4

C65

100nF

GND GND GND

Title: ST-LINK/V2-1 with support of SWD only

Project:

Size: A4 Reference: MB1297

Date: 12/03/2017

Revision:

Sheet: 11

D of 11

Designed by DiZiC

UM2153 Board revision history and limitations

Appendix C Board revision history and limitations

Board

MB1297

MB1297

MB1297

MB1297

Table 12. Board revision history and limitations

Version Revision details Known limitations

A

B

C-01

D-01

Not available; engineering samples only

-

Not available; engineering samples only

-

First official IoT Discovery kit version with following changes compared to MB1297C schematics:

– Capacitor value for NFC matching changed (C53 = 10 pF instead of 47 pF and C71 =

10 pF instead of 47 pF)

– STSAFE-A100 (U9 component) not fitted on MB1297C

– Firmware revision inside the

Wi-Fi module must be:

C3.5.2.3.BETA9. The Wi-Fi module maximum output power is limited to 9 dBm to fulfill

FCC/IC/CE requirements.

– A limitation is present on the

MB1297C-01 board. The reset connexion between STM32L4 and the ST-LINK MCU

(STM32F103) is not present even if schematics are correct.

The software reset is available so that the hardware missing reset may not be necessary. If the hardware reset is needed, a simple workaround is available by soldering an external wire between the SB2 and SB8.

– Firmware revision inside the

Wi-Fi module must be:

C3.5.2.3.BETA9. The Wi-Fi module maximum output power is limited to 9 dBm to fulfill

FCC/IC/CE requirements.

Second official IoT Discovery kit.

No BOM changes compared to the

MB1297 C-01 BOM, that is C53 =

10pF, C71 = 10pF and STSAFE-

A100 (U9 component) not fitted.

Two pcb changes compared to the

MB1297 C-01 pcb:

– The reset connexion between

STM32L4 and the ST-LINK MCU

(STM32F103) is implemented of the MB1297 rev D

– The pcb below the Wi-Fi antenna has been removed to have more

Wi-Fi radiated output power

– Firmware revision inside the Wi-

Fi module must be:

C3.5.2.3.BETA9. The Wi-Fi module maximum output power is then limited to 9 dBm to fulfill

FCC/IC/CE requirements.

– A board serial number is printed on the back side of the board.

This number is on a sticker under the MB1297 reference.

For B-L475EIOT01A1C boards, if this number is lower than 182

404 896 or for B-

L475EIOT01A2C boards, if this number is lower than 184 906

074, the default firmware connecting to AWS Cloud does not work anymore. It can be changed by downloading an updated version available at http://www.st.com/x-cube-aws.

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Federal Communications Commission (FCC) and Industry Canada (IC) Compliance UM2153

Appendix D Federal Communications Commission (FCC) and Industry Canada (IC) Compliance

Applicable for IoT node Discovery kit products with order code B-L475E-IOT01A1

(containing SPSGRF-915 module).

D.1 FCC Compliance Statement

Contains FCC ID: O7P-362

Contains FCC ID: S9NSPBTLERF

Contains FCC ID: S9NSPSGRF

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and the receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

8.8

54/57

Any changes or modifications to this equipment not expressly approved by

STMicroelectronics may cause harmful interference and void the user’s authority to operate this equipment.

IC Compliance Statement

Contains/Contient IC: 10147A-362

Contains/Contient IC: 8976C-SPBTLERF

UM2153 Rev 5

UM2153 Federal Communications Commission (FCC) and Industry Canada (IC) Compliance

Contains/Contient IC: 8976C-SPSGRF

Industry Canada ICES-003 Compliance Label: CAN ICES-3 (B)/NMB-3(B)

This device complies with Industry Canada’s licence-exempt RSSs. Operation is subject to the following two conditions:

1. This device may not cause interference; and

2. This device must accept any interference, including interference that may cause undesired operation of the device.

Étiquette de conformité à la NMB-003 d’Industrie Canada: CAN ICES-3 (B)/NMB-3(B)

Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes:

1.

L’appareil ne doit pas produire de brouillage;

2. L’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en compromettre le fonctionnement.

To satisfy FCC and IC RF Exposure requirements for mobile devices, a separation distance of 20 cm or more should be maintained between the antenna of this device and persons during operation. To ensure compliance, operation at closer than this distance is not recommended. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

Pour satisfaire aux exigences FCC et IC concernant l'exposition aux champs RF pour les appareils mobiles, une distance de séparation de 20 cm ou plus doit être maintenu entre l'antenne de ce dispositif et les personnes pendant le fonctionnement. Pour assurer la conformité, il est déconseillé d'utiliser cet équipement à une distance inférieure. Cet

émetteur ne doit pas être co-situé ou fonctionner conjointement avec une autre antenne ou un autre émetteur.

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Revision history

Revision history

UM2153

Date

31-Mar-2017

14-Apr-2017

28-Jun-2017

14-Mar-2018

08-Oct-2019

Table 13. Document revision history

Revision Changes

1

2

3

4

5

Initial version.

Updated

Section 7.12.6: Time-of-Flight and gesture detection sensor (VL53L0X) to add Class 1 laser information.

Updated:

Section 7.11.3: Wi-Fi module Inventek system

ISM43362-M3G-L44 (802.11 b/g/n)

and Section Appendix B:

Schematics to reflect MB1297 rev D updates.

Updated

Section 7.10: Virtual COM port

and Table 4: ARDUINO® connector pinout .

Updated

Section 1: Features ,

Section 7.9: Quad-SPI NOR Flash memory

, Table 12: Board revision history and limitations

56/57

UM2153 Rev 5

UM2153

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