Page 1
UM2743
User manual
Discovery kit for LTE Cat M/NBIoT with STM32L4 Series
Introduction
The B-L462E-CELL1 Discovery kit is a turnkey development platform for cellular IoT devices. The Discovery kit contains a
low-power Discovery main board powered by an LBAD0ZZ1SE module, a global coverage antenna, and a fan-out board.
The LBAD0ZZ1SE module includes an STM32L462REY6TR microcontroller, an LBAD0XX1SC-DM ultra-small LTE Cat M/NB
modem, and an ST4SIM-200M GSMA-certified embedded SIM with a prepaid cellular connectivity data plane. ST4SIM-200M
can also be used as an embedded secure element (eSE) for application.
STMod+ and extended pins connectivity provide unlimited expansion capabilities with a large choice of specialized add-on
boards. Moreover, the fan-out board supports add-on boards using mikroBUS™, ESP‑01, Grove I2C, Grove UART, and
breadboard. The B-L462E-CELL1 Discovery kit includes an ST-LINK debugger/programmer and comes with the comprehensive
STM32Cube software libraries together with packaged software examples to demonstrate end-to-end connectivity.
This document provides information about the Discovery kit hardware features and instruction to run the demonstration
application software.
Figure 1. B-L462E-CELL1 Discovery kit for IoT nodes
Picture is not contractual.
UM2743 - Rev 1 - March 2021
For further information contact your local STMicroelectronics sales office.
www.st.com
Page 2
1 Features
• LBAD0ZZ1SE module from Murata powered by STM32L462RE with built-in eSIM (ST4SIM-200M), LTE
Cat M/NBIoT modem (LBAD0XX1SC-DM), and 1 Mbyte of Quad-SPI Flash memory
• Ultra-low-power STM32L4 Series STM32L462REY6TR microcontroller based on the Arm® Cortex®-M4 core
with 512 Kbytes of Flash memory and 160 Kbytes of RAM in a WLCSP64 package
• 64 Mbytes of onboard Quad-SPI Flash memory from Micron®, exclusive with the 1 MByte of Quad-SPI Flash
memory inside the module
• 16 Kbytes of I2C EEPROM (M24128-DFMN6TP) from STMicroelectronics
• 0.96-inch 128 x 64 OLED screen with SPI interface
•
Low-power Audio CODEC with PCM bus and I2C interface (MAX9867ETJ+ from Maxim)
• Ultra-low-power 3D accelerometer and 3D magnetometer (LSM303AGR) from STMicroelectronics
• Capacitive digital sensor for relative humidity and temperature (HTS221) from STMicroelectronics
• 260-1260 hPa absolute digital output barometer (LPS22HH) from STMicroelectronics
• 3 user LEDs
• 2 push-buttons (user and reset)
• Board connectors:
– SMA antenna connector
– Two 50-pin 2.54 mm pitch headers
– STMod+
– micro-SIM card slot
– 3.5 mm CTIA stereo headset jack including analog microphone input
– USB Micro-B connectors for power, USARTs, USB device, and ST-LINK/V2-1
– TAG10
– mikroBUS™ expansion connectors
– ESP‑01 expansion connector
– Grove Seeed Studio™ breadboard, I2C, and UART expansion connectors
• Flexible power-supply options: ST-LINK USB, User USB, UART USB, Power USB, or three AAA batteries
• On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability: mass storage, Virtual
COM port, and debug port
• End-to-end connectivity applications
• Low‑power cellular network services from Truphone
• 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.
®
UM2743
Features
UM2743 - Rev 1
page 2/58
Page 3
2 Ordering information
To order the B-L462E-CELL1 Discovery kit for IoT nodes, refer to Table 1. Additional information is available from
the datasheet and reference manual of the target STM32.
Order code Board references Target STM32
B-L462E-CELL1
1. Fan-out board.
2.1 Codification
The meaning of the codification is explained in Table 2.
• MB1508
• MB1280
Table 1. Ordering information
(1)
UM2743
Ordering information
STM32L462REY6TR
Table 2. Codification explanation
B-L462E-CELL1 Description B-L462E-CELL1
B Discovery kit with a variety of sensors Sensor node
L462 MCU product line in STM32 32-bit Arm Cortex MCUs STM32L462 in the STM32L4 Series
E
CELL Dedicated to cellular applications Discovery kit for cellular applications
STM32 Flash memory size:
• E for 512 Kbytes
512 Kbytes
UM2743 - Rev 1
page 3/58
Page 4
3 Development environment
The B-L462E-CELL1 Discovery kit for IoT nodes runs with the STM32L462RE 32-bit microcontroller based on the
Arm® Cortex®-M4 core.
3.1 System requirements
• Windows® OS (7, 8, or 10), Linux® 64-bit, or macOS
• USB Type-A or USB Type-C® to Micro-B cable
Note:
3.2 Development toolchains
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.
• IAR Systems® - IAR Embedded Workbench
• Keil® - MDK-ARM
(1)
• STMicroelectronics - STM32CubeIDE
1.
On Windows® only.
UM2743
Development environment
®
®(1)
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.
UM2743 - Rev 1
page 4/58
Page 5
4 Conventions
Table 3 provides the conventions used for the ON and OFF settings in the present document.
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
UM2743
Conventions
Table 3. ON/OFF convention
UM2743 - Rev 1
page 5/58
Page 6
5 Delivery 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.
UM2743
Delivery recommendations
UM2743 - Rev 1
page 6/58
Page 7
6 References
Murata provides access to documents and support from CatM1/NB-IoT Type1SE support site for customers who
purchase Evaluation kits for the Type1SE family. Follow the instruction provided in the Murata Type1SE overview
to access the mymurata website and use the code found on the B-L462E-CELL1 insert card.
UM2743
References
UM2743 - Rev 1
page 7/58
Page 8
7 Hardware layout and configuration
The B-L462E-CELL1 Discovery kit for IoT nodes is designed around the LBAD0ZZ1SE Murata module. The
hardware block diagram (Refer to Figure 2) illustrates the connection between LBAD0ZZ1SE and peripherals:
OLED screen, sensors, USB FS connector, USARTs, audio, EEPROM, micro SIM card, and embedded ST-LINK/
V2-1. Figure 3 and Figure 4 help the user to locate these features on the B-L462E-CELL1 Discovery kit for IoT
nodes. Figure 5 and Figure 6 give the mechanical dimensions of the B-L462E-CELL1 board.
Figure 2. Hardware block diagram
UM2743
Hardware layout and configuration
Micro-USB
Stmod+
connector
TAG10
STLINK/V2-1
QSPI
Flash
Micro-USB
OLED
eSE interface
Sensors
EEPROM
Tamper
button
Level shifter
Extension
connector CN12
LEDs
SWD
UART1
QSPI1
USB
SPI3
I2C1
MCU Part
GPIO
TIMER
PCM
I2C0
SIM
ST4SIM
UART1
UART2
RF
Modem
Part
GPIO
Codec
SIM card
eSE interface
USB-UART
converter
SMA
Connector
Extension
connector CN13
Audio
jack
slot
Micro-USB
UM2743 - Rev 1
Battery
LBAD0ZZ1SE
Power USB
page 8/58
Page 9
UM2743 - Rev 1
SIM card slot (CN2)
Modem LED status
(PSM and TX)
Current measurement
User LED(LD1,LD2,LD3)
jumper (JP1)
STMod+(P1)
OLED screen (U1)
TAG10 (CN3)
Reset button (B1)
User button (B2)
Figure 3. B-L462E-CELL1 Discovery kit for IoT nodes (top view)
USB PWR (CN11)
USB ST-LINK (CN9)
ST-LINK MCU (U12)
LBAD0ZZ1SE (U5)
1.8V LDO (U19)
ST-LINK COM (LD6)
Flash (U8)
LSM303AGR (U7)
HTS221 (U10)
LPS22HH (U6)
Sensor interrupt
pins (CN7)
USB UART (CN10)
SMA connector (CN1)
User USB (CN8)
page 9/58
UM2743
Page 10
UM2743 - Rev 1
Figure 4. B-L462E-CELL1 Discovery kit for IoT nodes (bottom view)
Pins to modem (CN13)
Audio jack (CN14)
Audio codec (U24)
3.3V LDO (U25)
3.6V LDO (U30)
Battery case (BT1)
EEPROM (U23)
Level shifters
(U27, U28, and U29)
Pins to MCU (CN12)
page 10/58
UM2743
Page 11
UM2743 - Rev 1
Figure 5. B-L462E-CELL1 Discovery kit for IoT nodes mechanical drawing (top view)
page 11/58
UM2743
Page 12
UM2743 - Rev 1
Figure 6. B-L462E-CELL1 Discovery kit for IoT nodes mechanical drawing (bottom view)
page 12/58
UM2743
Page 13
7.1 Embedded STLINK/V2-1
The ST-LINK/V2-1 programming and debugging tool is integrated on the B-L462E-CELL1 Discovery kit for IoT
nodes. 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 user manual ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 (UM1075) at the
www.st.com website.
7.1.1 Drivers
The ST-LINK/V2-1 requires a dedicated USB driver, which, for Windows 7®, Windows 8® and Windows 10®, is
found at www.st.com.
In case the B-L462E-CELL1 Discovery kit for IoT nodes is connected to the PC before the driver is installed,
some Discovery board interfaces may be declared as “Unknown” in the PC device manager. In this case, the user
must install the dedicated driver files, and update the driver of the connected device from the device manager as
shown in Figure 7.
Note: Prefer using the “USB Composite Device” handle for a full recovery.
UM2743
Embedded STLINK/V2-1
7.1.2 ST-LINK/V2-1 firmware upgrade
The ST-LINK/V2-1 embeds a firmware upgrade mechanism for the 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 B-L462E-CELL1 Discovery kit for IoT nodes and periodically, to stay up-to-date with the latest firmware
version.
Figure 7. USB composite device
UM2743 - Rev 1
page 13/58
Page 14
UM2743
Power supply
7.1.3 Target voltage level on STM32CubeProgrammer
The target voltage level is shown on the STM32CubeProgrammer. On the B-L462E-CELL1 Discovery kit for IoT
nodes, the target (STM32L462RE on the module) voltage is 1.8 V.
Note: To reduce the power consumption for low‑power measurement, the value of R62 and R55 sampling resistors is
raised from 4.7 kΩ to 1 MΩ. In this case, the target voltage can not be correctly measured by ST-LINK and may
be displayed as 1.6 V on STM32CubeProgrammer.
7.2 Power supply
The B-L462E-CELL1 Discovery kit for IoT nodes is designed to be powered by a 5 V DC power supply. It is
possible to configure the B-L462E-CELL1 Discovery kit for IoT nodes to use any of the following five sources
for the power supply: UartUsbVbus, Vbus, 5V_USB_CHG, 5V_USB_PWR, and EXT_BAT. Power sources are
automatically selected by diodes.
All extern power sources are connected to the JP1 jumper, so JP1 can be used to measure the current which is
consumed by the module.
• UartUsbVbus is provided by the CN10 UART USB connector.
• Vbus is provided by the CN8 user USB connector.
• 5V_USB_CHG is provided by the CN9 ST-LINK/V2-1 USB connector. This power source can be controlled
by the onboard ST-LINK/V2-1.
• 5V_USB_PWR is provided by the CN11 power USB connector.
• EXT_BAT is connected to a battery case that contains three AAA batteries. As it can only provide a 4.5 V
power source, this power source is not designed for long-time and huge-current applications. Low-power
applications can consider using this as the main power source and other applications may use this as the
back-up power source.
UM2743 - Rev 1
page 14/58
Page 15
Figure 8. Power tree
UM2743
Power supply
ST-LINK/V2-1
LBAD0ZZ1SE
3.3 V LDO
LD3985M33R
3.6 V LDO
ST1L05BPUR
1.8 V LDO
ST1L05BPUR
USB_ST_LINK
USB_UART
USB_DEVICE
USB_PWR
Battery
0.96-inch
OLED
Quad-SPI
Flash
1V8_MD
SB33
VDDIO_MDM
VDDIO
VDDIO
VDD_SIM
SB34
1.8 V
3.3 V LDO
ST1L05BPUR
HTS221
USB to UART
EEPROM
Audio codec
LSM303AGR
LPS22HH
SIM card
I/O level-
translation
UM2743 - Rev 1
page 15/58
Page 16
7.3 Clock source
One clock source is described below:
• X1 8 MHz clock for the ST-LINK MCU.
The other clock source is the 32.768 KHz in the module which is used to be the RTC clock source for the
STM32L462RE microcontroller.
7.4 Reset sources
The reset signal of the B-L462E-CELL1 Discovery kit for IoT nodes is active LOW and the reset sources include:
• A reset button B1
• An embedded ST-LINK/V2-1
• A TAG10 connector reset pad
7.5 USB device FS
The B-L462E-CELL1 Discovery kit for IoT nodes supports USB device function via the CN8 USB Micro-B
connector.
UM2743
Clock source
7.6 Quad-SPI NOR Flash memory
64 Mbytes of onboard Quad-SPI Flash memory (MT25QU512ABB1EW9-0SIT from Micron) is connected to the
Quad-SPI interface of STM32L462RE in LBAD0ZZ1SE. The Flash shares the same QSPI IO as on‑module Flash
memory. So solder bridge is used to select the target Flash memory (SB43 is OFF and SB28 is ON). On‑module
Flash is used by default.
7.7 Virtual COM port
The serial interface USART1 is directly available as a Virtual COM port of the PC connected to the CN9 ST-LINK/
V2-1 USB connector. The Virtual COM port settings are configured with 115200 bps, 8‑bit data, no parity, one stop
bit, and no flow control.
7.8 STMicroelectronics sensors
Several STMicroelectronics sensors are available on the B-L462E-CELL1 Discovery kit for IoT nodes and are
listed below:
• Ultra-low-power 3D accelerometer and 3D magnetometer (LSM303AGR)
• 260 hPa to 1260 hPa absolute digital output barometer (LPS22HH)
• Capacitive digital sensor for relative humidity and temperature (HTS221)
7.8.1 Ultra-low-power 3D accelerometer and 3D magnetometer (LSM303AGR)
LSM303AGR is an ultra-low-power high-performance system-in-package featuring a 3D digital linear acceleration
sensor and a 3D digital magnetic sensor.
LSM303AGR has linear acceleration full scales of ±2g/±4g/±8g/16g and a magnetic field dynamic range of
±50 gauss.
LSM303AGR includes an I2C serial bus interface that supports standard, fast mode, fast mode plus, and highspeed (100 kHz, 400 kHz, 1 MHz, and 3.4 MHz) and an SPI serial standard interface. On the B-L462E-CELL1
Discovery kit for IoT node the I2C1 bus from the STM32L462REY6TR is used.
The system can be configured to generate an interrupt signal for free-fall, motion detection, and magnetic field
detection.
The magnetic and accelerometer blocks can be enabled or put into power-down mode separately.
LSM303AGR is available in a plastic land grid array package (LGA) and is guaranteed to operate over an
extended temperature range from -40 °C to +85 °C.
• 3 magnetic field channels and 3 acceleration channels
UM2743 - Rev 1
page 16/58
Page 17
• ±50 gauss magnetic dynamic range
• ±2/±4/±8/16 g selectable acceleration full scales
• 16-bit data output
• SPI / I2C serial interfaces
• Analog supply voltage 1.71 V to 3.6 V
• Power-down mode / low-power mode
• Current consumption in power-down: 2 μA
• Accelerometer current consumption Magnetic sensor in power-down mode, 50 Hz ODR in low-power
mode:7.7uA
• Programmable interrupt generators for freefall, motion detection, and magnetic field detection
• Embedded self-test
• Embedded temperature sensor
• Embedded FIFO
•
ECOPACK®, RoHS, and “Green” compliant
7.8.2 260 hPa to 1260 hPa absolute digital output barometer (LPS22HH)
The absolute pressure-sensing device LPS22HH is an ultra-compact piezoresistive sensor that 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 I2C or SPI. On the B-L462E-CELL1 Discovery kit for IoT nodes, the I2C1 bus from
STM32L462REY6TR is used.
The sensing element, which detects absolute pressure, consists of a suspended membrane manufactured using a
dedicated process developed by ST.
LPS22HH 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.
The main features of LPS22HH are:
• From 260 hPa to 1260 hPa absolute pressure range
• Current consumption down to 4 μA
• Absolute pressure accuracy: 0.5 hPa
• Low-pressure sensor noise: 0.65 Pa
• High-performance TCO: 0.65 Pa/°C
• Embedded temperature compensation
• 24-bit pressure data output
• ODR from 1 Hz to 200 Hz
• SPI, I2C, or MIPI I3CSM interfaces
• Embedded FIFO
• Interrupt functions: Data-Ready, FIFO flags, pressure thresholds
• Supply voltage: from 1.7 to 3.6 V
• High shock survivability: 22,000 g
• Small and thin package
• ECOPACK® lead-free compliant
UM2743
STMicroelectronics sensors
UM2743 - Rev 1
page 17/58
Page 18
7.8.3 Capacitive digital sensor for relative humidity and temperature (HTS221)
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.
HTS221 is available in a small top-holed cap land grid array (HLGA-6L 2 mm x 2 mm x 0.9 mm) package
guaranteed to operate over a temperature range from -40 °C to +120 °C.
The main features of HTS221 are:
• 0 to 100% relative humidity range
• Low-power consumption: 2 μA @ 1 Hz ODR
• Selectable ODR from 1 Hz to 12.5 Hz
• High relative humidity (rH) sensitivity: 0.004% rH/LSB
• Humidity accuracy: ± 3.5% rH, from +20% to +80% rH
• Temperature accuracy: ± 0.5 °C, from +15 °C to +40 °C
• Embedded 16-bit ADC
• 16-bit humidity and temperature output data
•
SPI and I2C interfaces. On the B-L462E-CELL1 Discovery kit for IoT nodes, the I2C1 bus from
STM32L462REY6TR is used.
• Factory calibrated: Tiny 2 mm x 2 mm x 0.9 mm package
• ECOPACK® compliant
UM2743
EEPROM (M24128-DFMN6TP)
7.9 EEPROM (M24128-DFMN6TP)
128-Kbit serial I²C bus EEPROM(M24128-DFMN6TP) is connected to the I2C1 interface of STM32L462REY6TR.
Its features are:
• Compatible with all I2C bus modes: – 1 MHz – 400 kHz – 100 kHz
• Memory array:
– 128 Kbits (16 Kbytes) of EEPROM
– Page size: 64 bytes
– Additional Write lockable page (M24128-D order codes)
• Single supply voltage and high speed: 1 MHz clock from 1.7 V to 5.5 V
• Standby supply current: 1uA, device not selected, VIN = VSS or VCC, VCC = 1.8 V
• Write:
– Byte Write within 5 ms
– Page Write within 5 ms
• Operating temperature range from -40 °C up to +85 °C
• Random and Sequential Read modes
• Write protect of the whole memory array
• Enhanced ESD/Latch-Up protection
• More than 4 million write cycles
• More than 200-years data retention
UM2743 - Rev 1
page 18/58
Page 19
UM2743
OLED screen
7.10 OLED screen
9OL9935701000 is a 0.96-inch OLED screen with the SSD1315Z driver IC. On the B-L462E-CELL1 Discovery kit
for IoT nodes, the SPI3 bus from STM32L462REY6TR is used to connect this OLED screen. It has the following
features:
• Small molecular organic light-emitting diode
• Color: White
• Panel matrix: 128x64
• Driver IC: SSD1315Z
• Excellent quick response time
• Extremely thin thickness for best mechanism design: 1.42 mm
• High contrast: 2000:1
• Wide viewing angle: 160°
• 3/4 wire Serial Peripheral Interface
• Wide range of operating temperature: -40 °C to 70 °C
• Anti-glare polarizer
Note: The SPI3 is also shared with ST4SIM-200M. As ST4SIM is powered by the modem power supply, there is a
need to control the LDO at the modem side by sending related AT commands.
7.11 Audio codec
MAX9867ETJ+ is an ultra-low-power stereo audio codec designed for portable consumer devices such as mobile
phones and portable gaming consoles. The codec is connected to the modem through the PCM bus which is
used to transmit voice data and the I2C bus which provides a control for volume levels, signal mixing, and general
operating modes. Its I2C address for write commands is 0x30.
Note: VoLTE and audio features are not used in the current version of the LBAD0ZZ1SE module. The customer must
contact Murata to enable such an option as needed.
UM2743 - Rev 1
page 19/58
Page 20
7.12 Buttons and LEDs
The B1 black button located on the top left side is the reset of the STM32L462REY6TR microcontroller. Refer to
Figure 3.
The B2 blue button located on the top left side is used as a digital input or as an alternate wake-up function.
When the button is depressed the logic state is LOW, otherwise, the logic state is HIGH.
Three LEDs (LD1, LD2, and LD3), located on the top left side are available for the user. To light a LED a logic
state HIGH must be written in the corresponding GPIO. As the GPIOs can be connected to timers in the chip, the
user may use the PWM function to control the brightness of LEDs.
Reference Color Name Comment
B1 Black Reset -
B2 Blue Wake-up Alternate function Wake-up
LD1 Green User LED1 PC6
LD2 Red User LED2 PB15
LD3 Blue User LED3 PB14
LD4 Green LED4
LD5 Green LED5 TX_IND, controlled by the modem
reference Bicolor (red and green) ST-LINK COM Green during communication
LD7 Red Fault Power Current upper than 750 mA
UM2743
Buttons and LEDs
Table 4. Button and LED control port
PSM_IND, controlled by the modem, lights
ON when the modem is not in low‑power
mode, and OFF when the modem is in
low‑power mode.
7.13
I2C addresses of modules used on MB1508
Table 5 displays the I2C read and write addresses for the modules that are connected to the I2C1 bus.
Table 5. I2C addresses for each module
Modules Description SAD[6:0] + R/W I2C write address I2C read address
HTS221
LPS22HH MEMS nano pressure sensor
LSM303AGR
M24128-
DFMN6TP
Capacitive digital sensor for relative
humidity and temperature
3D accelerometer and 3D
magnetometer
128-Kbit serial I2C bus EEPROM
1011111X 0xBE 0xBF
1011101x
(SDA[0]=1])
0011001x
(Linear
acceleration)
0011110x
(Magnetic field)
1010000x
(Memory array)
1011000x
(Identification
page)
0xBA 0xBB
0x32
(Linear
acceleration)
0x3C
(Magnetic field)
0xA0
(Memory array)
0xB0
(Identification
page)
acceleration)
(Magnetic field)
(Memory array)
(Identification
0x33
(Linear
0x3D
0xA1
0xB1
page)
UM2743 - Rev 1
page 20/58
Page 21
8 Connectors
Sixteen connectors are implemented on the B-L462E-CELL1 Discovery kit for IoT nodes:
• CN1 SMA connector for antenna
• CN2 SIM card slot
• CN3 Tag connector
• CN4 ST-LINK select jumper
• CN5 ST-LINK debug connector
• CN6 reserved U.FL connector
• CN7 INT pins of sensors
• CN8 USB connector for DEVICE
• CN9 USB connector for ST_LINK
• CN10 USB connector for UART
• CN11 USB connector for power
• CN12 25*2 pins connector for MCU
• CN13 25*2 pins connector for modem
• CN14 3.5mm stereo headphone connector
• P1 socket 10X2 STMod+
Also, the JP1 jumper is used for IDD measurements.
JP2 jumper is used to program reset.
CN4 jumper is used to program the LBAD0ZZ1SE module.
UM2743
Connectors
8.1
SMA connector for antenna
On the LBAD0ZZ1SE module, the U.FL connector is the only way to connect an external antenna. LBAD0ZZ1SE
can use the SMA rod antenna through the CN1 cable which converts the SMA port to U.FL port. The antenna is
permanently fixed to the SMA connector as per FCC requirement.
UM2743 - Rev 1
page 21/58
Page 22
8.2 SIM card slot
CN2 is a micro-SIM card slot.
The SIM card slot only supports micro-SIM cards and it supports card detect function which can detect the
presence of the SIM card. When the SIM-card exists, the CD signal pin is floating. Otherwise, the signal pin
is pulled down. As R8 is soldered, the floating state is replaced by the pull-up state. Only a Class-C SIM card
handling 1.8V is supported.
Connector Pin number Pin name Signal name Function
CN2
UM2743
SIM card slot
Table 6. SIM card slot
1 CD SIM_DETECT SIM card detection
2 GND - Power
3 GND - Power
4 GND - Power
5 GND - Power
C1 VCC VDD_SIM Power
C2 RST SIM_RST SIM RST
C3 CLK SIM_CLK SIM clock
C5 GND - Power
C6 VPP VDD_SIM Power
C7 I/O SIM_DATA SIM data
8.3 Tag connector
CN3 is a tag connector that provides a direct debug port for the MCU.
The tag connector is implemented on the B-L462E-CELL1 board. The tag connector is a 10-pin footprint
supporting SWD mode, which is shared with the same signals as ST-LINK.
The TC2050-IDC-NL cable is used to link ST-LINK and tag connector on the B-L462E-CELL1 Discovery kit for
IoT nodes, so that the STM32L4 in the module can be easily programmed and debugged without any extra
accessory.
Figure 9. Tag connector
UM2743 - Rev 1
page 22/58
Page 23
Figure 10. TC2050-IDC-NL cable
Table 7. Tag connector pinout
UM2743
ST-LINK select jumper
Connector
CN3
Pin
number
1 1.8V 1V8 - Power
2 TMS/SWDIO TMS/SWDIO PA13 Serial wire data I/O
3 GND - - Ground
4 TCK/SWCLK TCK/SWCLK PA14 Serial wire clock
5 GND - - Ground
6 SWO SWO PB3 Serial wire output
7 NC - - -
8 NC - - -
9 NC - - -
10 RESET# RESET# NRST RESET
8.4 ST-LINK select jumper
The ST-LINK select connector is a 4-pin, 2.54-mm pitch male connector. It is used to decide which target the
ST-LINK is connected to.
Connector
CN4
Pin
number
1 T_JTCK T_JTCK -
2 TCK/SWCLK TCK/SWCLK PA14
3 T_JTMS T_JTMS -
4 TMS/SWDIO TMS/SWDIO PA13
Pin name Signal name
Table 8. ST-LINK select jumper
Pin name Signal name
STM32L
4 pin
STM32L
4 pin
Function
Function
When CN4 [1-2] and
CN4 [3-4] are ON,
the Discovery board
is selected.
UM2743 - Rev 1
page 23/58
Page 24
8.5 ST-LINK debug connector
The ST-LINK debug connector is a 6-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.
Table 9. ST-LINK debug connector pinout
Connector Pin number Pin name Signal name STM32L4 pin Function
1 GND GND - Power
2 T_JTCK TCK/SWCLK PA14 Serial wire clock
CN5
3 GND GND - Power
4 T_JTMS TMS/SWDIO PA13 Serial wire data I/O
5 T_NRST T_NRST NRST RESET
6 T_SWO T_SWO PB3 Serial wire output
8.6 INT pins of sensors
UM2743
ST-LINK debug connector
Table 10. INT pins of sensors
Connector Pin number Pin name Signal name Function
CN7
1 DRDY INT_HUM HTS221 INT
2 INT/DRDY INT_PRE LPS22HH INT
UM2743 - Rev 1
page 24/58
Page 25
8.7 USB connector for the user device
This USB connector is used to connect the USB device port in the STM32L462REY6TR microcontroller. Refer to
Figure 11 for pin‑number location.
This USB connector can be used for communication with external-host USB. USB driver is delivered as part of
STM32Cube MCU Package including CDC and mass-storage device classes.
Table 11. USB connector for the user device
Connector Pin number Pin name Signal name STM32L4 pin Function
1 VBUS VBUS - Power
2 DM USB_DM PA11 USB Device -
CN8
3 DP USB_DP PA12 USB Device +
4 ID - - -
5 GND GND - Power
Figure 11. USB Micro-B connector (front view)
UM2743
USB connector for the user device
8.8 USB connector for ST-LINK
This USB connector is used to connect the embedded ST-LINK/V2-1 to the PC to program and debug the
STM32L462REY6TR microcontroller. Refer to Figure 11 for pin‑number location.
Connector Pin number Pin name Signal name ST-LINK MCU pin Function
1 VBUS 5V_USB_CHG - Power
2 DM STL_USB_D_N PA11 USB ST-LINK -
CN9
3 DP STL_USB_D_P PA12 USB ST-LINK +
4 ID - - -
5 GND GND - Power
Table 12. USB connector for ST-LINK
UM2743 - Rev 1
page 25/58
Page 26
8.9 USB connector for UART
This USB connector is used to connect the UARTs of the modem to debug and update the modem in
LBAD0ZZ1SE. Refer to Figure 11 for pin‑number location.
The user must refer to Murata documentation describing how to use the debug interface.
Connector Pin number Pin name Signal name Function
1 VBUS UartUsbVbus Power
2 DM USBDM USB UART -
CN10
3 DP USBDP USB UART +
4 ID - -
5 GND GND Power
8.10 USB connector for power
This USB connector is only used to power the whole system and it has no communication functions. Refer to
Figure 11 for pin‑number location.
UM2743
USB connector for UART
Table 13. USB connector for UART
Table 14. USB connector for power
Connector Pin number Pin name Signal name Function
1 VBUS 5V_USB_PWR Power
2 DM - -
CN11
3 DP - -
4 ID - -
5 GND GND Power
UM2743 - Rev 1
page 26/58
Page 27
8.11 Extension pin header for MCU
This connector is a 50-pin, 2.54-mm pitch male connector. It is used to connect the MCU’s pins in the module.
Table 15. Extension pin header for MCU
UM2743
Extension pin header for MCU
Connector Pin number Signal name Function
1
2 PB0
AVDD Power -
QUADSPI_IO1
3 PA0 USART2_CTS -
4 PB1
QUADSPI_IO0
5 PA1 USART2_RTS -
6 PB2_R CS_DISP -
7 PA2 USART2_TX -
8 PB3 SWO -
9 PA3 USART2_RX -
10 GND Power -
11 PA4 SPI_NSS
12 PB4 SPI1_MISO -
13 PA5 SPI1_SCK -
14 PB5 SPI1_MOSI -
CN12
15 PA6
16 PB6 SF_EN
17 PA7
QUADSPI_IO3
QUADSPI_IO2
18 PB7_R NC_PWR_EN
19 GND Power -
20 PB8 IIC_SCL -
21 PA8 RCC_MCO -
22 PB9 IIC_SDA -
23 PA9 USART1_TX -
24 PB10
QUADSPI_CLK
25 PA10 USART1_RX SB46 OFF
26 PB11
QUADSPI_nCS
27 PA11 USB_DM -
28 PB14 LED3 -
29 PA12 USB_DP -
30 GND Power -
31 PA13 SWDIO -
32 PB15 LED2 -
How to disconnect with function
block on B-L462E-CELL1 board
(1)
(1)
-
-
PA4 is used on LBAD0ZZ1SE, it is
not recommended to use PA4 as an
extension pin for daughterboard on
CN12.
(1)
-
PB6 is used on LBAD0ZZ1SE, PB6
cannot be used as an extension pin.
(1)
-
PB7_R is used on LBAD0ZZ1SE,
PB7_R cannot be used as an extension
pin.
(1)
(1)
-
-
UM2743 - Rev 1
page 27/58
Page 28
UM2743
Extension pin header for MCU
Connector Pin number Signal name Function
How to disconnect with function
block on B-L462E-CELL1 board
33 PA14 SWCLK -
34 PC6 LED1 -
35 PA15 SPI1_NSS -
PC7 is used on LBAD0ZZ1SE, it is
36 PC7 NC_RST_IND
not recommended to use PC7 as an
extension pin for daughterboard on
37 PC0 ADC1_IN1 -
38 PC9 TIM3_CH4 -
39 GND Power -
Cannot be disconnected from OLED
and LBAD0ZZ1SE on B-L462E-CELL1
40 PC10 SPI3_SCK
board, it is not recommended to use
PC10 as extension pin for daughter
41 PC1 ADC1_IN2 -
CN12
Cannot be disconnected from OLED
and LBAD0ZZ1SE on B-L462E-CELL1
42 PC11 D/C_DISP
board, it is not recommended to use
PC11 as extension pin for daughter
43 PC2 INT_ACC SB14 and SB15 OFF.
Cannot be disconnected from OLED
and LBAD0ZZ1SE on B-L462E-CELL1
44 PC12 SPI3_MOSI
board, it is not recommended to use
PC12 as extension pin for daughter
45 PC3 INT_MAG -
46 PC13
User/Tamper
Button
47 PH0 Extern Clock In -
48 1V8 Power -
49 PH1 RST_DISP -
1. All pins that are exposed to Quad-SPI are not recommended to use to control external devices.
50 PH3 BOOT0 -
CN12.
board on CN12.
board on CN12.
board on CN12.
-
UM2743 - Rev 1
page 28/58
Page 29
8.12 Extension pin header for modem
This connector is a 50-pin, 2.54-mm pitch male connector. It is used to connect the modem pins in LBAD0ZZ1SE.
Note that all signals that are started with FFU are not used with the current module version. Contact Murata to
discuss any options.
Table 16. Extension pin header for modem
Connector Pin number Signal name Function
1
2 VDDIO_MDM Power
3 FFU_I2C0_SDA Audio codec I2C SDA
4 PMU_VBACKUP -
5 VDD_MD Power
6 FFU_PSM_IND -
7 NC_SIM_CLK SIM card signal clock
8 FFU_TX_IND -
9 NC_SIM_RST SIM card reset
10 GND Power
11 NC_SIM_IO SIM card data input/output
12 NC_RST Modem reset
13 VDD_SIM Power
14 FFU_GNSS_CODES_IND -
15 NC_SIM_DETECT SIM card detect
16 FFU_GNSS_EXT_LNA -
17 FFU_CLKOUT Audio Codec clock
CN13
18 FFU_GNSS_SFN_IND -
19 GND Power
20 NC_RST_IND -
21 FFU_PCM_IN Audio PCM signal in
22 NC_UART0_RTS Modem UART0 RTS
23 FFU_PCM_OUT Audio PCM signal out
24 NC_UART0_CTS Modem UART0 CTS
25 FFU_PCM_FS -
26 NC_UART0_TX Modem UART0 TX
27 FFU_PCM_CLK Audio PCM signal clock
28 NC_UART0_RX Modem UART0 RX
29 RFT_UART1_TX Modem UART1 TX
30 GND Power
31 RFT_UART1_RX Modem UART1 RX
32 NC_DWU -
33 RFT_UART1_CTS Modem UART1 CTS
34 NC_HWU -
35 RFT_UART1_RTS Modem UART1 RTS
UM2743
Extension pin header for modem
FFU_I2C0_SCL Audio codec I2C SCL
UM2743 - Rev 1
page 29/58
Page 30
3.5 mm stereo headphone connector
Connector Pin number Signal name Function
36 NC_PWR_BUTTON -
37 RFT_UART2_TX Modem UART2 TX
38 eSIM_SWP -
39 GND Power
40 1V8_MD Power
41 RFT_UART2_RX Modem UART2 RX
42 3V3 Power
CN13
43 RFT_UART2_CTS Modem UART2 CTS
44 FFU_RFFE_VDDIO -
45 RFT_UART2_RTS Modem UART2 RTS
46 FFU_RFFE_SCLK -
47 PMU_AT_IN -
48 FFU_RFFE_SDATA -
49 PMU_AT_OUT -
50 5V Power
UM2743
8.13 3.5 mm stereo headphone connector
This headphone connector supports the CTIA standard which means the sequence of signals is Left, Right, GND
and Mic.
8.14 Socket 10×2 STMod+
On the B-L462E-CELL1 Discovery kit for IoT nodes, the STMod+ connector provides flexibility in a small form
factor application.
The related STM32L462REY6TR I/Os for STMod+ are listed in Table 17. The STMod+ connector is a 20-pin
2.00 mm pitch right-angle female connector.
Table 17. Socket 10×2 STMod+
Connector
CN12
Pin number Signal name
1 PA0_C - - PA0 UART2_CTS/SPI_CS
2
3
4
5 GND - - - Power
6 5V - - - Power
7 PB8_C - - PB8 I2C1_SCL
8 PB5_C - - PB5 SPI3_MOSIs
9 PB4_C - - PB4 SPI3_MISOs
10 PB9_C - - PB9 I2C1_SDA
PC12_C SB56 ON SB60OFF PC12 SPI3_MOSIp
PA2_C SB56 OFF SB60ON PA2 UART2_TX
PC11_C SB55 ON SB58OFF PC11 SPI3_MISOp
PA3_C SB55 OFF SB58ON PA3 UART2_RX
PC10_C SB54 ON SB61OFF PC10 SPI3_SCK
PA1_C SB54 OFF SB61ON PA1 UART2_RTS
Solder bridge
(1)
STM32L4 pin Function
UM2743 - Rev 1
page 30/58
Page 31
UM2743
Jumper description
Connector Pin number Signal name
11 PC1_C - - PC1 INT
12 PH0_C - - PH0 RESET
13 PC0_C - - PC0 ADC1_IN1
14 PC9_C - - PC9 TIM3_CH4
CN12
15 5V - - - Power
16 GND - - - Power
17 PA8_C - - PA8 I/O
18 PA5_C - - PA5 I/O
19 PA15_C - - PA15 I/O
1. Default solder bridge state is shown in bold
20 PB14_C - - PB14 I/O
8.15 Jumper description
The STM32 current measurement can be done on JP1. By default, the JP1 jumper is ON.
For the current measurement configuration, the JP1 jumper is OFF and an ammeter must be placed on JP1.
JP2 connects the NRST of the SWD protocol and the NRST of the LBAD0ZZ1SE module. By default, the JP2
jumper is ON.
JP3 is the ST-LINK serial port network. It can be connected to other devices to read data through jumpers. By
default, the JP3 jumper is OFF.
JP4 is the ST-LINK NRST network, which can control the status of ST-LINK MCU. By default, the JP4 jumper is
OFF.
CN4 is used to select the ST-LINK network. By default, CN4[1-2] and CN4[3-4] are ON.
CN5 is used for ST-LINK debug connector. By default, the CN5 jumper is OFF.
Solder bridge
(1)
STM32L4 pin Function
UM2743 - Rev 1
page 31/58
Page 32
Cellular and end-to-end data plane connectivity setup
9 Cellular and end-to-end data plane connectivity setup
The Discovery board comes with a pre‑programmed application that demonstrates an out-of-the-box end‑to‑end
with low‑power connectivity over LTE Cat M or NB-IoT technology.
For flexibility, the Discovery board supports the dual SIM feature which allows switching between a plastic SIM
card inserted in a SIM socket or the embedded SIM (eSIM) inside the LBAD0ZZ1SE module.
The SIM selection policy is controlled by the modem firmware running on LBAD0XX1SC and stored in its
configuration files which can be modified via AT command. By default, the SIM selection policy is controlled by the
software package provided by STMicroelectronics dedicated for this board and the user does not need to send
explicitly an AT command.
Figure 12. LBAD0ZZ1SE structure diagram
UM2743
ST4SIM-200M supports also an embedded Secure Element (eSE). The eSE can be used to store application
(cloud) credentials (device certificates and keys). The eSE service can be accessed via ISO, modem firmware, or
from the STM32 application through the SPI interface.
9.1
Note: The modem firmware is certified by GCF and PTCRB. The user may use a plastic SIM card from any mobile
SIM card socket
CN2 is a micro-SIM (3FF) card slot that supports only the class‑C SIM card (1.8V). The modem firmware detects
the presence of the SIM card and monitors in runtime SIM removal or insertion. By default, when a SIM card is
inserted, it is used for cellular connectivity, otherwise, eSIM provides connectivity to cellular networks.
Runtime detection of SIM insertion/removal may not be supported by the default pre-programmed application, but
a newer version of such application can be downloaded from www.st.com. If the runtime detection function is not
supported, the user does need to force a reboot by pressing the black “reset button”, after a SIM card is inserted
or removed to force the application to select the SIM slot and use the SIM for the cellular connectivity.
operator but the modem firmware may not have passed the certification from that specific operator. Therefore,
the usage of a plastic SIM card is only at the user's responsibility and it may need an additional procedure to
activate the SIM card. The user may contact Murata to get information about the list of operators on which the
modem firmware is certified.
When a SIM card is used, the cellular middleware can automatically set the APN to be used during registration
to the network. thanks to a pre-defined table IMSI (MCC/MNC) to APN. However, if the IMSI is unknown, the
end-customer may need to define explicitly the APN as defined in the user manual X-CUBE-CELLULAR cellular
connectivity Expansion Package for STM32Cube (UM2426).
UM2743 - Rev 1
page 32/58
Page 33
9.2 eSIM
eSIM is the new standard in SIM technology, developed by the GSMA and already widely accepted by the
telecoms market.
eSIM is a smart, rewritable, and multi‑network SIM which is embedded into the module itself and allows to swap
profiles without removing the SIM. An embedded SIM allows, as a result, to store multiple MNO profiles on a
single device.
An embedded SIM (hosted in ST4SIM-200M) is pre-integrated inside LBAD0ZZ1SE. ST4SIM-200M is GSMA
qualified product pre-integrated with Remote SIM Provisioning platform and interoperable with all GSMA qualified
platforms.
The embedded SIM is pre-provisioned with Truphone® global connectivity profile allowing an out‑of‑the‑box
cellular connectivity experience. The network coverage can be found on the Truphone® web portal.
Before using the eSIM for connectivity, the user must activate the SIM data plane as defined by the following
procedure:
Step 1: Retrieve the ICCID of the Truphone® profile
To retrieve ICCID, the user just needs to connect a PC to the CN9 USB ST-LINK connector and launch a terminal
connected to the COM port associated with the USB ST-LINK.
Refer to Section 7.1 to set up the USB ST-LINK driver.
The terminal configuration must be the following one:
UM2743
eSIM
Figure 13. Terminal configuration
When the PC is connected to the board and powered ON, the pre‑programmed application displays information
on the board OLED display and generates logs on the terminal console.
UM2743 - Rev 1
page 33/58
Page 34
ICCID can be captured on the terminal console as shown in Figure 14.
Figure 14. Terminal console showing ICCID
UM2743
eSIM
In this example, ICCID is 8944477300000021070
Note: If the user accidentally overwrites or deletes the original pre-programmed application, he can still load a new
application from B-L462E-CELL1 and retrieve a new version of the application related to this board. If such
trace is no longer available with the newer application, or if the user wants to read ICCID at any time, he may
manually enter the AT command at AT%CCID via the terminal console as shown in Figure 15:
Figure 15. at AT%CCID command response
UM2743 - Rev 1
page 34/58
Page 35
UM2743
eSIM
Step 2: Connect to the Truphone® web portal to activate the eSIM profile
The user must connect to the Truphone® web portal https://iot.truphone.com (using Chrome, Firefox, Safari, or
Edge browser) and follow the provided instructions to create a user account if needed. Once logged in, the user
can activate the SIM cards (eSIMs) right after completing registration as shown in Figure 16:
Figure 16. Account creation screen
Click on “Activate SIMs” and a new page appears to invite the user to enter the ICCID of the eSIM to be activated.
To activate one or a small number of SIMs, the user simply needs to enter ICCID and click Submit. Multiple
ICCIDs may also be entered.
Figure 17. Activation screen
UM2743 - Rev 1
page 35/58
Page 36
UM2743
eSIM
Once the user enters the ICCIDs to activate, then the type of SIMs about to activate is presented. To proceed, the
user clicks on continue
Figure 18. SIM description details screen
SIM includes a free 50‑Mbyte complementary data available for 90 days after activation
Figure 19. Data plan selection screen
UM2743 - Rev 1
page 36/58
Page 37
Review the activation details and click Activate plan(s).
Figure 20. User account details
UM2743
eSIM
The activation of the SIM card may take a few minutes to complete and the SIM card status is shown on the IoT
portal's dashboard once it is activated.
Figure 21. SIM activation progress screen
UM2743 - Rev 1
page 37/58
Page 38
UM2743
Embedded secure element
After the activation process, the user has access to all the functionalities to manage the SIM cards and
connectivity as well as the activation of any additional SIM cards to the same user account.
Figure 22. Dashboard screenshot
Click on “Activate SIMs” and a new page appears to invite the user to enter the ICCID of the eSIM to be activated.
Step 3: Perform Network search and registration
To force the device to search and register to a cellular network known as PLMN selection, the user simply needs
to reboot the board either by pressing the black reset button or disconnect and reconnect the USB ST-LINK cable.
The first time the boards registers to the network it may take some time, normally a few seconds but it can take
up to 20 minutes to find a network, depending on the radio environment, used technology (Cat M or NB-IoT), and
Truphone® network availability.
9.3
Note: eSE applet is by default not present in ST4SIM-200M. To enable such a feature, the user must contact
Embedded secure element
An eSE (embedded secure element) applet can also be hosted in the ST4SIM-200M. It can be used to store
application credentials (Certificates and keys). The access to eSE is controlled and exposed via a software library
provided by STMicroelectronics as part of the application software developed for the board.
The eSE can be accessed at any time irrespective of the SIM slot that is used for the connectivity. Indeed, a
plastic SIM card can be used for connectivity while eSE can still be used to access application credentials and
related security services. The only constraint is that when eSE is used or accessed (either via ISO or SPI), the
modem hardware cannot enter in its deepest low power as the modem firmware controls the power supply of the
ST4SIM-200M module.
STMicroelectronics.
UM2743 - Rev 1
page 38/58
Page 39
9.4 End-to-end connectivity
9.4.1 End-to-end data transfer
Once the cellular connectivity is activated and the device is registered on the network, the application preprogrammed on STM32 sends regularly (every 2 seconds) an echo message to an echo server located on the
internet. The user can see the trace of the communication result as shown in the terminal window.
Note that the RSSI level is also monitored every 10 seconds and displayed (AT+CSQ) on the terminal console.
UM2743
End-to-end connectivity
Figure 23. Terminal console trace
UM2743 - Rev 1
page 39/58
Page 40
9.4.2 End-to-end ping
When registered to the network, the user can verify the quality (latency, round-trip) of the end-to-end internet
connectivity by sending ICMP ping to a server reachable via the internet. By default, the device pings the Google
DNS server at 8.8.8.8. For that, the user can enter the command ping using the terminal as shown in Figure 24.
UM2743
End-to-end connectivity
Figure 24. Terminal console ping command
UM2743 - Rev 1
page 40/58
Page 41
UM2743
End-to-end connectivity
The user can also check the statistics min/average/max round-trip of 10 pings and displayed on the terminal as
shown in Figure 25.
Figure 25. Terminal console ping command statistics
UM2743 - Rev 1
page 41/58
Page 42
10 B-L462E-CELL1 board information
10.1 Product marking
The stickers located on the top or bottom side of the PCB provide product information:
• Product order code and product identification for the first sticker
• Board reference with revision, and serial number for the second sticker
On the first sticker, the first line provides the product order code, and the second line the product identification.
On the second sticker, the first line has the following format: “MBxxxx-Variant-yzz”, where “MBxxxx” is the board
reference, “Variant” (optional) identifies the mounting variant when several exist, "y" is the PCB revision and "zz"
is the assembly revision, for example B01. The second line shows the board serial number used for traceability.
Evaluation tools marked as “ES” or “E” are not yet qualified and therefore 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 designs or in production.
“E” or “ES” marking examples of location:
• On the targeted STM32 that is soldered on the board (For an illustration of STM32 marking, refer to the
STM32 datasheet “Package information” paragraph at the www.st.com website).
• Next to the evaluation tool ordering part number that is stuck or silk-screen printed on the board.
UM2743
B-L462E-CELL1 board information
10.2 Board revision history
Revision C03
The revision C03 of the MB1508 is the initially released version.
10.3 Known limitations
Revision C03
None
UM2743 - Rev 1
page 42/58
Page 43
UM2743
B-L462E-CELL1 Discovery kit for IoT nodes I/O assignment
Appendix A B-L462E-CELL1 Discovery kit for IoT nodes I/O assignment
Note: The reader must refer to the latest version of the module datasheet to get the latest pin name. He can also use
the latest version of the product specification from Murata.
Table 18. B-L462E-CELL1 Discovery kit for IoT nodes I/O assignment
LBAD0ZZ1SE pin number
1 USART2_RTS PA1/USART2_RTS USART2_RTS
2 USART2_RX PA3/USART2_RX USART2_RX
3 USART2_TX PA2/USART2_TX USART2_TX
4 USART2_CTS PA0/USART2_CTS USART2_CTS
5 VDDA ADC power AVDD
6 VSSA ADC GND GND
7 NRST Reset STM32 NRST
8 NC -
9 NC -
10 GPIO_EXTI7 PC7/GPIO_EXTI7 GPIO_EXIT7
11 NC_RST_IND
12 NC -
13 NC -
14 NC -
15 NC -
16 RFT_UART2_CTS Recovery UART_CTS UART2_CTS
17 RFT_UART2_TX Recovery UART_TX UART2_TX
18 RFT_UART2_RTS Recovery UART_RTS UART2_RTS
19 RFT_UART2_RX Recovery UART_RX UART2_RX
20 NC -
21 NC -
22 NC -
23 RFT_UART1_RTS Log UART_RTS UART1_RTS
24 RFT_UART1_TX Log UART_TX UART1_TX
25 RFT_UART1_RX Log UART_RX UART1_RX
26 RFT_UART1_CTS Log UART_CTS UART1_CTS
27 NC -
28 GND GND GND
29 NC -
30 NC -
31 NC -
32 NC -
33 NC -
LBAD0ZZ1SE pin name
(1)
Feature/comment
Modem reset indicator
(internal usage)
Signal name of Discovery
kit
FFU_RFFE_SCLK
FFU_RFFE_SDATA
(2)
(2)
NC_RST_IND
NC_UART0_RTS
NC_UART0_CTS
NC_UART0_TX
NC_UART0_RX
FFU_TX_IND
FFU_GNSS_COEX_IND
FFU_GNSS_EXT_LNA
NC_DWU
NC_HWU
VDDIO_MDM
PCM_OUT
PCM_FS
PCM_IN
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
UM2743 - Rev 1
page 43/58
Page 44
UM2743
B-L462E-CELL1 Discovery kit for IoT nodes I/O assignment
LBAD0ZZ1SE pin number
34 NC -
35 NC -
36 NC -
37 PMU_AT_IN Anti-tamper PMU_AT_IN
38 NC -
39 NC -
40 NC -
41 NC - NC_PWR_BUTTON
42 GND GND
43 VDD Module power VDD_MD
44 VDD Module power VDD_MD
45 VDD Module power VDD_MD
46 GND GND GND
47 NC -
48 NC -
49 NC_SIM_CLK SIM clock SIM_CLK
50 NC_VSIM SIM power supply VDD_SIM
51 GND GND GND
52 NC_SIM_DETECT SIM detect SIM_DETECT
53 NC_SIM_RST SIM reset SIM_RST
54 PH1_OSC_OUT PH1/RCC_OSC_OUT RST_DISP
55 PH0_OSC_IN PH0/RCC_OSC_IN PH0_OSC_IN
56 NC -
57 NC_SIM_IO SIM data SIM_DATA
58 ADC1_IN1 PC0/ADC1_IN1 ADC1_IN1
59 ADC1_IN3 PC2/ADC1_IN3 ADC1_IN3
60 ADC1_IN2 PC1/ADC1_IN2 INT_ACC
61 ADC1_IN4 PC3/ADC1_IN4 INT_MAG
62 RTC_TAMP1 PC13/RTC_TAMP1 RTC_TAMP1
63 BOOT0 PH3/BOOT0 BOOT0
64 SF_EN PB6/SF_EN SF_EN
65 RCC_MCO PA8/RCC_MCO RCC_MCO
66 NC -
67 NC -
68 VDD_1V8
69 I2C1_SDA PB9/I2C1_SDA I2C1_SDA
70 I2C1_SCL PB8/I2C1_SCL I2C1_SCL
71 VBAT Backup supply 1V8_MD
LBAD0ZZ1SE pin name
(1)
Feature/comment
Reserved for codec
supply/MCU VBAT/MCU
VDDA
Signal name of Discovery
kit
GND
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
PCM_CLK
PMU_AT_OUT
PMU_VBACKUP
CLKOUT
NC_RST
FFU_GNSS_SFN_IND
FFU_PSM_IND
PB7_R
FFU_RFFE_VDDIO
I2C0_SCL
I2C0_SDA
1V8_MD
UM2743 - Rev 1
page 44/58
Page 45
UM2743
B-L462E-CELL1 Discovery kit for IoT nodes I/O assignment
LBAD0ZZ1SE pin number
LBAD0ZZ1SE pin name
(1)
Feature/comment
72 SPI1_SCK PA5/SPI1_SCK SPI1_SCK
73 SPI1_MOSI PB5/SPI1_MOSI SPI1_MOSI
74 SPI1_MISO PB4/SPI1_MISO/NJTRST SPI1_MISO
75 SPI1_NSS PA15/SPI1_NSS/JTDI SPI1_NSS
76 TIM2_CH2
PB3/TIM2_CH2/JTDO/
TRACESWO
77 NC -
78 NC -
79 GND GND GND
80 NC -
81 eSIM_SWP SWP for NFC to ST33 eSIM_SWP
82 NC -
83 NC -
84 VDDUSB 3.3V supply for modem USB 3V3
85 SWCLK PA14/JTCK/SWCLK TCK/SWCLK
86 SWDIO PA13/JTMS/SWDIO TMS/SWDIO
87 USB_DP PA12/USB_DP USB_DP
88 USB_DM PA11/USB_DM USB_DM
89 USART1_RX PA10/USART1_RX STLK_RX
90 USART1_TX PA9/USART1_TX STLK_TX
91 TIM15_CH2 PB15/TIM15_CH2 LED2
92 TIM15_CH1 PB14/TIM15_CH1 LED3
93 TIM3_CH4 PC9/TIM3_CH4 TIM3_CH4
94 TIM3_CH1 PC6/TIM3_CH1 LED1
95 QUADSPI_IO0 PB1/QUADSPI_BK1_IO0 QSPI_IO0
96 QUADSPI_CLK PB10/QUADSPI_CLK QSPI_CLK
97 QUADSPI_nCS PB11/QUADSPI_BK1_NCS QSPI_NCS
98 SF_nCS
Internal serial flash chip
99 QUADSPI_IO1 PB0/QUADSPI_BK1_IO1 QSPI_IO1
100 QUADSPI_IO3 PA6/QUADSPI_BK1_IO3 QSPI_IO3
101 QUADSPI_IO2 PA7/QUADSPI_BK1_IO2 QSPI_IO2
102-126 GND GND GND
1. Pin name may be updated, refer to the latest version of module datasheet.
2. Signals are only for debug or internal usage.
select
Signal name of Discovery
kit
SWO
D/C_DISP
SPI3_MOSI
SPI3_SCK
SPI3_NSS
CS_DISP
(2)
(2)
(2)
(2)
(2)
SF_nCS
UM2743 - Rev 1
page 45/58
Page 46
UM2743
STMod+fan-out expansion board
Appendix B STMod+fan-out expansion board
Refer to the user manual STMod+ fan-out expansion board for STM32 Discovery kits and Evaluation boards
(UM2695).
UM2743 - Rev 1
page 46/58
Page 47
Appendix C Antenna parameters
Figure 26. Electrical and physical properties
UM2743
Antenna parameters
UM2743 - Rev 1
page 47/58
Page 48
Figure 27. S-parameter test
UM2743
Antenna parameters
UM2743 - Rev 1
page 48/58
Page 49
Figure 28. Test efficiency
UM2743
Antenna parameters
UM2743 - Rev 1
page 49/58
Page 50
UM2743
Federal Communications Commission (FCC) and Innovation, Science and Economic Development Canada (ISED) Compliance Statements
Appendix D Federal Communications Commission (FCC) and Innovation,
Science and Economic Development Canada (ISED) Compliance Statements
For FCC and ISED regulatory information regarding embedded LBAD0ZZ1SE Murata module, refer to section 10
of LBAD0ZZ1SE-493 Product Specification No. JEBMM0 1897, Dec 2, 2020.
D.1 FCC Compliance Statement
Part 15.19
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.
Part 15.21
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.
Part 15.105
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 instruction, 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 interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Note: Use only shielded cables.
D.2
Responsible party (in the USA)
Terry Blanchard
Americas Region Legal | Group Vice President and Regional Legal Counsel, The Americas
STMicroelectronics, Inc.
750 Canyon Drive | Suite 300 | Coppell, Texas 75019
USA
Telephone: +1 972-466-7845
ISED Compliance Statement
This device complies with FCC and ISED Canada RF radiation exposure limits set forth for general population for
mobile application (uncontrolled exposure). This device must not be collocated or operating in conjunction with
any other antenna or transmitter.
Compliance Statement
Notice: This device complies with ISED Canada licence-exempt RSS standard(s). 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.
ISED Canada ICES-003 Compliance Label: CAN ICES-3 (B) / NMB-3 (B).
UM2743 - Rev 1
page 50/58
Page 51
Déclaration de conformité
Avis: Le présent appareil est conforme aux CNR d'ISDE 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, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage
est susceptible d'en compromettre le fonctionnement.
Étiquette de conformité à la NMB-003 d'ISDE Canada : CAN ICES-3 (B) / NMB-3 (B).
RF exposure statement
To satisfy FCC and ISED 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 ISED 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.
D.3 CE / RED
UM2743
CE / RED
EN 55032 / CISPR32 (2012) Class B product
Warning: this device is compliant with Class B of EN55032 / CISPR32. In a residential environment, this
equipment may cause radio interference.
Avertissement : cet équipement est conforme à la Classe B de la EN55032 / CISPR 32. Dans un environnement
résidentiel, cet équipement peut créer des interférences radio.
Simplified CE declaration of conformity:
ST Microelectronics hereby declares that the device B-L462E-CELL1 conforms with the essential requirements of
Directive 2014/53/EU. The declaration of conformity can be found at www.st.com.
UM2743 - Rev 1
page 51/58
Page 52
Revision history
UM2743
Table 19. Document revision history
Date Revision Changes
23-Mar-2021 1 Initial release.
UM2743 - Rev 1
page 52/58
Page 53
UM2743
Contents
Contents
1 Features...........................................................................2
2 Ordering information ..............................................................3
2.1 Codification ...................................................................3
3 Development environment .........................................................4
3.1 System requirements ...........................................................4
3.2 Development toolchains .........................................................4
3.3 Demonstration software .........................................................4
4 Conventions.......................................................................5
5 Delivery recommendations ........................................................6
6 References ........................................................................7
7 Hardware layout and configuration.................................................8
7.1 Embedded STLINK/V2-1 .......................................................13
7.1.1 Drivers ...............................................................13
7.1.2 ST-LINK/V2-1 firmware upgrade ............................................13
7.1.3 Target voltage level on STM32CubeProgrammer ...............................14
7.2 Power supply .................................................................14
7.3 Clock source .................................................................16
7.4 Reset sources ................................................................16
7.5 USB device FS ...............................................................16
7.6 Quad-SPI NOR Flash memory ..................................................16
7.7 Virtual COM port ..............................................................16
7.8 STMicroelectronics sensors .....................................................16
7.8.1 Ultra-low-power 3D accelerometer and 3D magnetometer (LSM303AGR) ............16
7.8.2 260 hPa to 1260 hPa absolute digital output barometer (LPS22HH).................17
7.8.3 Capacitive digital sensor for relative humidity and temperature (HTS221).............18
7.9 EEPROM (M24128-DFMN6TP) .................................................18
7.10 OLED screen.................................................................19
7.11 Audio codec ..................................................................19
7.12 Buttons and LEDs .............................................................20
UM2743 - Rev 1
page 53/58
Page 54
UM2743
Contents
7.13 I2C addresses of modules used on MB1508 .......................................20
8 Connectors .......................................................................21
8.1 SMA connector for antenna .....................................................21
8.2 SIM card slot .................................................................22
8.3 Tag connector ................................................................22
8.4 ST-LINK select jumper .........................................................23
8.5 ST-LINK debug connector ......................................................24
8.6 INT pins of sensors ............................................................24
8.7 USB connector for the user device ...............................................25
8.8 USB connector for ST-LINK .....................................................25
8.9 USB connector for UART .......................................................26
8.10 USB connector for power .......................................................26
8.11 Extension pin header for MCU...................................................27
8.12 Extension pin header for modem ................................................29
8.13 3.5 mm stereo headphone connector .............................................30
8.14 Socket 10×2 STMod+..........................................................30
8.15 Jumper description ............................................................31
9 Cellular and end-to-end data plane connectivity setup.............................32
9.1 SIM card socket...............................................................32
9.2 eSIM ........................................................................33
9.3 Embedded secure element .....................................................38
9.4 End-to-end connectivity ........................................................39
9.4.1 End-to-end data transfer ..................................................39
9.4.2 End-to-end ping ........................................................40
10 B-L462E-CELL1 board information ................................................42
10.1 Product marking ..............................................................42
10.2 Board revision history ..........................................................42
10.3 Known limitations .............................................................42
Appendix A B-L462E-CELL1 Discovery kit for IoT nodes I/O assignment ..............43
Appendix B STMod+fan-out expansion board .........................................46
UM2743 - Rev 1
page 54/58
Page 55
UM2743
Contents
Appendix C Antenna parameters .....................................................47
Appendix D Federal Communications Commission (FCC) and Innovation, Science and
Economic Development Canada (ISED) Compliance Statements ...................50
D.1 FCC Compliance Statement ....................................................50
D.2 ISED Compliance Statement ....................................................50
D.3 CE / RED ....................................................................51
Revision history .......................................................................52
Contents ..............................................................................53
List of tables ..........................................................................56
List of figures..........................................................................57
UM2743 - Rev 1
page 55/58
Page 56
UM2743
List of tables
List of tables
Table 1. Ordering information..................................................................3
Table 2. Codification explanation ...............................................................3
Table 3. ON/OFF convention ..................................................................5
Table 4. Button and LED control port ........................................................... 20
Table 5. I2C addresses for each module .........................................................20
Table 6. SIM card slot......................................................................22
Table 7. Tag connector pinout ................................................................ 23
Table 8. ST-LINK select jumper ...............................................................23
Table 9. ST-LINK debug connector pinout ........................................................ 24
Table 10. INT pins of sensors ................................................................. 24
Table 11. USB connector for the user device .......................................................25
Table 12. USB connector for ST-LINK............................................................ 25
Table 13. USB connector for UART ............................................................. 26
Table 14. USB connector for power ............................................................. 26
Table 15. Extension pin header for MCU .......................................................... 27
Table 16. Extension pin header for modem ........................................................29
Table 17. Socket 10×2 STMod+................................................................30
Table 18. B-L462E-CELL1 Discovery kit for IoT nodes I/O assignment .....................................43
Table 19. Document revision history ............................................................. 52
UM2743 - Rev 1
page 56/58
Page 57
UM2743
List of figures
List of figures
Figure 1. B-L462E-CELL1 Discovery kit for IoT nodes ................................................1
Figure 2. Hardware block diagram .............................................................8
Figure 3. B-L462E-CELL1 Discovery kit for IoT nodes (top view) ........................................9
Figure 4. B-L462E-CELL1 Discovery kit for IoT nodes (bottom view) ..................................... 10
Figure 5. B-L462E-CELL1 Discovery kit for IoT nodes mechanical drawing (top view) ......................... 11
Figure 6. B-L462E-CELL1 Discovery kit for IoT nodes mechanical drawing (bottom view) ...................... 12
Figure 7. USB composite device.............................................................. 13
Figure 8. Power tree ......................................................................15
Figure 9. Tag connector.................................................................... 22
Figure 10. TC2050-IDC-NL cable .............................................................. 23
Figure 11. USB Micro-B connector (front view).....................................................25
Figure 12. LBAD0ZZ1SE structure diagram ....................................................... 32
Figure 13. Terminal configuration .............................................................. 33
Figure 14. Terminal console showing ICCID....................................................... 34
Figure 15. at AT%CCID command response ...................................................... 34
Figure 16. Account creation screen ............................................................ 35
Figure 17. Activation screen .................................................................35
Figure 18. SIM description details screen ........................................................ 36
Figure 19. Data plan selection screen ........................................................... 36
Figure 20. User account details ...............................................................37
Figure 21. SIM activation progress screen........................................................ 37
Figure 22. Dashboard screenshot.............................................................. 38
Figure 23. Terminal console trace.............................................................. 39
Figure 24. Terminal console ping command ....................................................... 40
Figure 25. Terminal console ping command statistics ................................................ 41
Figure 26. Electrical and physical properties ...................................................... 47
Figure 27. S-parameter test.................................................................. 48
Figure 28. Test efficiency.................................................................... 49
UM2743 - Rev 1
page 57/58
Page 58
UM2743
IMPORTANT NOTICE – PLEASE 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
products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.
Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of
Purchasers’ products.
No license, express or implied, to any intellectual property right is granted by ST herein.
Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.
ST and the ST logo are trademarks of ST. For additional information about ST trademarks, please refer to www.st.com/trademarks. All other product or service
names are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2021 STMicroelectronics – All rights reserved
UM2743 - Rev 1
page 58/58
Loading...