STM32WL5xx/STM32WL33x 32-Bit Wireless Long-Range MCUs

The STMicroelectronics STM32WL33xx is an ultra-low-power wireless application processor intended for RF wireless applications in the sub-1 GHz band. It is designed to operate in license-free ISM and SRD frequency bands such as 169 MHz, 433 MHz, 868 MHz, and 915 MHz. It adopts a single-core architecture embedding an Arm® 32-bit Cortex®-M0+ CPU that can operate up to 64 MHz. It integrates high-speed and flexible memory types of up to 256 KB Flash, up to 32 KB RAM, and a one-time programmable (OTP) memory area of 1 KB.

The STM32WL33xx embeds a wide set of peripherals, including a 20-pin (16 segments + 4 commons) LCD driver, 12-bit 8-channel ADC, analog comparator, DAC, LC sensor controller, RTC, IWDG, general purpose timers, AES-128, RNG, CRC, and communication interfaces like USART, SPI, and I2C. Moreover, the security features enable secure boot with USART/SWD block (write protection) and sensitive information storage in Flash (read-out protection).

The STM32WL33xx is compatible with standardized or proprietary protocols such as LoRaWAN®, Sigfox, W-MBUS, and more (fully open wireless system on chip).

STM32WL55x and STM32WL54xx long-range wireless and ultra-low-power devices embed a powerful ultra-low-power LPWAN-compliant radio solution, enabling modulations LoRa® (available in STM32WLx5xx only), (G)FSK, (G)MSK, and BPSK.

The STM32WL55x and STM32WL54xx are compatible with standardized or proprietary protocols such as LoRaWAN, Sigfox, W-MBUS, and more (fully open wireless system on chip).

STM32WL5x Features

• Multiprotocol LPWAN 32-bit Arm Cortex-M4 and Cortex-M0+ MCUs up to 256 KB Flash, 64 KB SRAM
  • Frequency range: 150 MHz to 960 MHz
  • Modulation: LoRa, (G)FSK, (G)MSK and BPSK
  • Transmitter high output power, programmable up to +22 dBm
  • Transmitter low output power, programmable up to +15 dBm
• Compatible with standardized or proprietary protocols such as LoRaWAN, Sigfox, W-MBUS, and more (fully open wireless system on chip)
  • Hardware encryption AES 256-bit
  • Unique device identifier (64-bit UID compliant with IEEE 802-2001 standard)
  • 96-bit unique die identifier
  • Hardware public key accelerator (PKA)
• Advanced security features
  • Trusted zone isolation
  • Key management services
  • Secure sub-GHz MAC layer
  • Secure firmware update (SFU)
  • Secure firmware install (SFI)