STMicroelectronics STM32WL55x 32-Bit Wireless Long-Range MCUs embed a powerful and ultra-low-power LPWAN-compliant radio solution that enables LoRa®, (G)FSK, (G)MSK, and BPSK modulations. The microcontrollers are low-power and based on the high-performance Arm® Cortex®-M4 32-bit RISC core operating at a frequency of up to 48MHz. The core implements a full set of DSP instructions and is complemented by an Arm Cortex-M0+ microcontroller. Both cores implement an independent memory protection unit (MPU) that refines the application security. STMicroelectronics STM32WL55x 32-bit Wireless Long-Range MCUs integrate a 12-bit ADC, a 12-bit DAC low-power sample-and-hold, and two ultra-low-power comparators associated with a high-accuracy reference voltage generator. These devices operate at -40°C to +105°C from a 1.8V to 3.6V power supply.
Features
ECOPACK2-compliant package
Radio
Frequency range of 150MHz to 960MHz
Modulation of LoRa, (G)FSK, (G)MSK and BPSK
RX sensitivity of –123dBm for 2-FSK (at 1.2Kbit/s), –148dBm for LoRa (at 10.4kHz, spreading factor 12)
Transmitter high output power, programmable up to +22dBm
Transmitter low output power, programmable up to +15dBm
Compliant with the following radio frequency regulations such as 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)
Ultra-low-power platform
1.8V to 3.6V power supply
-40°C to +105°C temperature range
Shutdown mode of 31nA (VDD = 3V)
Standby (+ RTC) mode of 360nA (VDD = 3V)
Stop2 (+ RTC) mode of 1.07µA (VDD = 3V)
Active-mode MCU of <72µA/MHz (CoreMark®)
Active-mode RX of 4.82mA
Active-mode TX of 15mA at 10dBm and 87mA at 20dBm (LoRa 125kHz)
Core
32-bit Arm Cortex-M4 CPU
Adaptive real-time accelerator (ART accelerator) allowing 0-wait-state execution from flash memory, frequency up to 48MHz, MPU, and DSP instructions
1.25 DMIPS/MHz (Dhrystone 2.1)
32-bit Arm Cortex-M0+ CPU
Frequency up to 48MHz, MPU
0.95DMIPS/MHz (Dhrystone 2.1)
Security and identification
Hardware encryption AES 256-bit
True random number generator (RNG)
Sector protection against read/write operations (PCROP, RDP, WRP)
CRC calculation unit
Unique device identifier (64-bit UID compliant with IEEE 802-2001 standard)
96-bit unique die identifier
Hardware public key accelerator (PKA)
Key management services
Secure sub-GHz MAC layer
Secure firmware update (SFU)
Secure firmware install (SFI)
Supply and reset management
High-efficiency embedded SMPS step-down converter
SMPS to LDO smart switch
Ultra-safe, low-power BOR (brownout reset) with 5 selectable thresholds
Ultra-low-power POR/PDR
Programmable voltage detector (PVD)
VBAT mode with RTC and 20x32-byte backup registers
