STM32WL series

The STM32WL series is based on ultra-low-power platforms, combining microcontroller low power modes with energy-efficient radio:

STM32WL5x/Ex provides stop modes down to 1.07 µA with RTC and full product retention. Its LoRa-enabled radio goes down to 4.82mA* in active RX and 15mA* in TX mode at 10dBm power output.
STM32WL3x provides a deep-stop mode down to 980 nA with 32 Kbytes RAM retention. Its energy-efficient radio goes down to 4 mA* in active RX and 8 mA* in TX mode at 10dBm power output.

* sub-GHz radio current consumption only 

The radio is suitable for systems targeting compliance with radio regulations including, but not limited to, ETSI EN 300 220, FCC CFR 47 Part 15, and the Japanese ARIB T-108.

STM32WL3x microcontrollers support 2/4(G)FSK, (G)MSK, OOK, ASK, BPSK, and DSS modulations, fitting with standard communications such as Sigfox, W-MBUS, mioty^®,bi-directionnal, Wi-Sun (802.15.4g), and other proprietary protocols. An IQ interface is available so developers can develop their own modulation for even more flexibility. STM32WL3x hardware radio sequencer automates common radio operations such as frequency-hopping low-duty-cycle operations, LBT, RX Sniff, auto-ack and many more, saving MCU intervention and boosting radio efficiency. STM32WL5x/Ex microcontrollers integrate a LoRa^®-enabled radio complying with the physical layer requirements of the LoRaWAN^® specification released by the LoRa Alliance^®.

• RF impedance matching circuit to fit with 50Ω antennas.
• RF harmonic filters circuit fine-tuned to achieve the best RF performance.
• Metal shield coating for STM32WL SoC.

STM32WL5M  is compliant with RF regulations: FCC, CE, IC, ARIB.
It is certified for connection to LoRaWAN and SigFox network: LoRaWAN Certified™ and Sigfox verified™.

The STM32WL3x (M0+ single-core), STM32WLEx (M4 single-core), and STM32WL5x (M4 and M0+ dual-core) lines include a wide variety of communication features, such as up to 43 GPIOs, an integrated SMPS for power consumption optimization, and multiple low-power modes to maximize battery life. They also offer dual-power output and support multiple frequency ranges to ensure worldwide compatibility. To meet the needs of the metering market, the STM32WL3x integrates an LCD segment driver and a LC sensor controller for fluid sensing measurements in metering applications.

In addition to their wireless and ultra-low-power features, the STM32WL series includes embedded security hardware functions such as AES hardware encryption and read/write protection.
Additionally, the STM32WLEx provides a public-key accelerator with an elliptic curve cryptographic engine, and the dual-core STM32WL5x line also includes advanced security features such as secure key management services (SKMS), secure areas hardware isolation, secure boot, and secure firmware update.