6 Hardware layout and configuration
The B-L4S5I-IOT01A Discovery kit for the IoT node is designed around the STM32L4S5VIT6U 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
MP34DT01
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
Pmod
TM
(2A) connector
Pmod
TM
(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
MP34DT01
Digital microphone
UM2708
Hardware layout and configuration
UM2708 - Rev 1
page 7/43
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