Summary of STM32WLEX 32-BIT WIRELESS LONG-RANGE MCUS
STMicroelectronics’ STM32WLE5/E4xx MCUs combine an Arm Cortex-M4 core with an integrated ultra-low-power sub-GHz radio supporting LoRa, (G)FSK, (G)MSK, and BPSK, enabling long-range LPWAN connectivity and compatibility with protocols like LoRaWAN, Sigfox, and W-MBUS. They offer up to 256 KB Flash, 64 KB SRAM, multiple serial peripherals, wide frequency range (150–960 MHz), excellent RX sensitivity, and programmable TX power up to +22 dBm while meeting major regional RF regulations.
Parts used in the STM32WLEX Project:
- STM32WLE5/E4xx microcontroller (MCU) with integrated sub-GHz radio
- Arm Cortex-M4 CPU (embedded in MCU)
- Up to 256 KB Flash memory (embedded in MCU)
- Up to 64 KB SRAM (embedded in MCU)
- I2C interfaces (3 x I2C, embedded in MCU)
- USART interfaces (2 x USART, embedded in MCU)
- Low-power UART (1 x LP-UART, embedded in MCU)
- SPI interfaces (2 x SPI, embedded in MCU)
- Sub-GHz radio front-end supporting LoRa, (G)FSK, (G)MSK, BPSK (embedded in MCU)
- Programmable transmitter (supports up to +22 dBm and +15 dBm low power)
STMicroelectronics’ long-range wireless and ultra-low-power devices embed a powerful ultra-low-power LPWAN-compliant radio solution
STMicroelectronics’ STM32WLE5/E4xx long-range wireless and ultra-low-power devices embed a powerful ultra-low-power LPWAN-compliant radio solution, enabling the LoRa® (available in STM32WLx5xx only), (G)FSK, (G)MSK, and BPSK modulations. These MCUs are compatible with standardized or proprietary protocols such as LoRaWAN®, Sigfox, W-MBUS, and more (fully open wireless system on chip).
Features
Key Features
- Arm® Cortex®-M4 CPU up to 48 MHz
- Up to 256 KB Flash and 64 KB SRAM
- Sub-GHz radio – multi-modulations: LoRa, (G)FSK, (G)MSK, BPSK
- Peripherals: 3 x I²C, 2 x USART, 1 x LP-UART, 2 x SP
Additional Features
Radio
- Frequency range: 150…960 MHz
- Modulation: LoRa®, (G)FSK, (G)MSK, and BPSK
- RX sensitivity:
- -123 dBm for 2-FSK (at 1.2 Kbit/s)
- -148 dBm for LoRa® (at 10.4 kHz, spreading factor 12)
- Transmitter high output power, programmable up to +22 dBm
- Transmitter low output power, programmable up to +15 dBm
- Compliant with the following radio frequency regulations:
- ETSI EN 300 220, EN 300 113, EN 301 166, FCC CFR 47 Part 15, 24, 90, 101, and the Japanese ARIB STD-T30, T-67, T-108
- Compatible with standardized or proprietary protocols such as LoRaWAN®, Sigfox™, W-MBus, and more (fully open wireless system-on-chip)
Read more: STM32WLEX 32-BIT WIRELESS LONG-RANGE MCUS
- What radio modulations does the STM32WLE5/E4xx support?
It supports LoRa, (G)FSK, (G)MSK, and BPSK modulations. - What CPU and clock speed are used in these MCUs?
They use an Arm Cortex-M4 CPU running up to 48 MHz. - How much memory is available on the STM32WLE5/E4xx?
They offer up to 256 KB Flash and 64 KB SRAM. - What frequency range does the integrated radio cover?
The radio frequency range is 150 to 960 MHz. - What RX sensitivity can be achieved?
RX sensitivity is -123 dBm for 2-FSK at 1.2 Kbit/s and -148 dBm for LoRa at 10.4 kHz with spreading factor 12. - What transmitter output power levels are available?
Transmitter output power is programmable up to +22 dBm for high power and up to +15 dBm for low power. - Which wireless protocols are compatible with these devices?
They are compatible with LoRaWAN, Sigfox, W-MBUS, and other standardized or proprietary protocols. - What peripherals are provided on the MCU?
Peripherals include 3 I2C, 2 USART, 1 LP-UART, and 2 SPI interfaces. - Are these MCUs compliant with regulatory standards?
Yes, they comply with ETSI EN 300 220, EN 300 113, EN 301 166, FCC CFR 47 Parts 15/24/90/101, and Japanese ARIB standards T30, T-67, T-108.
