ST UM2708 Manual de usuario
Introduction
The B-L4S5I-IOT01A Discovery kit for the IoT node allows the user to develop applications with a direct connection to the cloud
servers.
The B-L4S5I-IOT01A Discovery kit for the IoT node enables a wide diversity of applications by exploiting low-power
multilink communication (Bluetooth® Low Energy, Wi‑Fi®, NFC), multiway sensing (detection, environmental awareness) and
Arm® 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 B-L4S5I-IOT01A Discovery kit for the IoT node includes an ST-LINK debugger/programmer and comes with the
comprehensive STM32CubeL4 MCU Package, which provides an STM32 comprehensive software HAL library as well as
various software examples to seamlessly connect to cloud servers.
Figure 1. B-L4S5I-IOT01A Discovery kit for the IoT node
Picture is not contractual.
Discovery kit for IoT node, multi-channel communication with STM32L4+ Series
UM2708
User manual
UM2708 - Rev 2 - December 2021
For further information contact your local STMicroelectronics sales office. www.st.com
1Features
• Ultra-low-power STM32L4+ Series STM32L4S5VIT6 microcontroller based on the Arm® Cortex®-M4 core
with 2 Mbytes of Flash memory and 640 Kbytes of RAM in LQFP100 package
• 64-Mbit Quad-SPI Flash memory from Macronix™
• Bluetooth® 4.1 module (SPBTLE-RF) from STMicroelectronics
• 802.11 b/g/n compliant Wi‑Fi® module (ISM43362-M3G-L44) from Inventek Systems
• Dynamic NFC TAG based on ST25DV04K with its printed NFC antenna
• 2 digital omnidirectional microphones ((I)MP34DT0x) from STMicroelectronics
• Capacitive digital sensor for relative humidity and temperature (HTS221) from STMicroelectronics
• High-performance 3-axis magnetometer (LIS3MDL) from STMicroelectronics
• 3D accelerometer and 3D gyroscope (LSM6DSL) from STMicroelectronics
• 260-1260 hPa absolute digital output barometer (LPS22HB) from STMicroelectronics
• Time-of-flight and gesture-detection sensor (VL53L0X) from STMicroelectronics
• Highly-secure solution (STSAFE-A110) from STMicroelectronics
• 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 VBUS, USB connector, 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 libraries and examples available with the STM32Cube MCU Package
• Support of a wide choice of Integrated Development Environments (IDEs) including IAR Embedded
Workbench®, MDK-ARM, and STM32CubeIDE
Note: Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
UM2708
Features
UM2708 - Rev 2 page 2/41
2Ordering information
To order the B-L4S5I-IOT01A Discovery kit for the IoT node, refer to Table 1. Additional information is available
from the datasheet and reference manual of the target STM32.
Table 1. Ordering information
Order code Board reference Target STM32
B-L4S5I-IOT01A MB1297 STM32L4S5VIT6
2.1 Codification
The meaning of the codification is explained in Table 2.
Table 2. Codification explanation
B-L4S5I-IOT01A Description B-L4S5I-IOT01A
B Discovery kit with a variety of sensors Sensor node
L4S5 MCU product line in STM32 32-bit Arm Cortex MCUs STM32L4R5/S5 in the STM32L4+ Series
ISTM32 Flash memory size:
• I for 2 Mbytes 2 Mbytes
IOT Dedicated to IoT applications Discovery kit for IoT applications
UM2708
Ordering information
UM2708 - Rev 2 page 3/41
3Development environment
The B-L4S5I-IOT01A Discovery kit for the IoT node runs with the STM32L4S5VI 32-bit microcontroller based on
the Arm® Cortex®-M4 core.
3.1 System requirements
• Multi‑OS support: Windows® 10, Linux® 64-bit, or macOS®
• USB Type-A or USB Type-C® to Micro-B cable
Note: macOS® is a trademark of Apple Inc. registered in the U.S. and other countries.
Linux® is a registered trademark of Linus Torvalds.
All other trademarks are the property of their respective owners.
3.2 Development toolchains
• IAR Systems® - IAR Embedded Workbench®(1)
• Keil® - MDK-ARM(1)
• STMicroelectronics - STM32CubeIDE
1. On Windows® only.
3.3 Demonstration software
The demonstration software, included in the STM32Cube MCU Package corresponding to the on-board
microcontroller, 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 www.st.com.
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Development environment
UM2708 - Rev 2 page 4/41
4Conventions
Table 3 provides the conventions used for the ON and OFF settings in the present document.
Table 3. ON/OFF convention
Convention Definition
Jumper JPx ON Jumper fitted
Jumper JPx OFF Jumper not fitted
Jumper JPx [1-2] Jumper fitted between Pin 1 and Pin 2
Solder bridge SBx ON SBx connections closed by 0 Ω resistor
Solder bridge SBx OFF SBx connections left open
Resistor Rx ON Resistor soldered
Resistor Rx OFF Resistor not soldered
UM2708
Conventions
UM2708 - Rev 2 page 5/41
5Delivery recommendations
Before first use, check the board for any damage that might have occurred during shipment, that all socketed
components are firmly fixed in their sockets and that none are loose in the plastic bag.
UM2708
Delivery recommendations
UM2708 - Rev 2 page 6/41
6Hardware layout and configuration
The B-L4S5I-IOT01A Discovery kit for the IoT node is designed around the STM32L4S5VIT6 target
microcontroller in a 100-pin LQFP package. The hardware block diagram (Refer to 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 three RF modules (Wi‑Fi®, Bluetooth®, and NFC). Figure 3 and Figure 4 help users to locate these
features on the B-L4S5I-IOT01A Discovery kit for the IoT node. Figure 5 gives the mechanical dimensions of the
B-L4S5I-IOT01A Discovery kit for the IoT node.
Figure 2. Hardware block diagram
STM32L4S5VIT6
(I)MP34DT0x digital microphone
RTC
SWD
3.3 V Power
supply
32 KHz Crystal
ST-LINK /
V2-1
GPIOs and
UART3
DFSDM
ISM43362-M3G-L44
Wi-Fi® module
PmodTM (2A) connector
PmodTM (4A) connector
LEDs,
reset and wake-up
buttons
GPIOs
GPIOs and
SPI2
GPIOs and
UART2
HS PHY and
Micro-AB USB
connector
OTG FS
QSPI
64-Mbit Quad-SPI Flash
(MX25R6435F)
VCP UART1
ARDUINO® UNo
Shield connectors
GPIOs,
UART4,
and SPI1
Micro-B
USB
connector
GPIOs and
SPI3
SPBTLE-RF
Bluetooth® module
SPSGRF Sub-GHz
(Spirit) module
Not fitted
ST25DV04K NFC
module
GPIOs and
I2C2
LIS3MDL
3-axis magnetometer
LSM6DSL
3D gyroscope
LPS22HB
digital barometer
HTS221
humidity and temperature
VL53L0X
ToF and gesture
detection
STSAFE-A110
authentication and
security
(I)MP34DT0x digital microphone
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Hardware layout and configuration
UM2708 - Rev 2 page 7/41
Figure 3. B-L4S5I-IOT01A Discovery kit for the IoT node layout (top view)
UM2708 - Rev 2 page 8/41
UM2708
Figure 4. B-L4S5I-IOT01A Discovery kit for the IoT node layout (bottom view)
UM2708 - Rev 2 page 9/41
UM2708
Figure 5. B-L4S5I-IOT01A Discovery kit for the IoT node mechanical drawing in millimeters
UM2708 - Rev 2 page 10/41
UM2708
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